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-----------------------------------------------------------
--------- AUTOGENERATED FILE, DO NOT EDIT -----------------
-----------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package desilog is
subtype u8 is unsigned( 7 downto 0);
subtype u16 is unsigned(15 downto 0);
subtype u32 is unsigned(31 downto 0);
subtype u64 is unsigned(63 downto 0);
subtype u2 is unsigned( 1 downto 0);
subtype u4 is unsigned( 3 downto 0);
type string_ptr is access string;
--function str(a : unsigned) return string;
--function str(a : integer) return string;
function dg_boolToBit(bval : boolean) return std_ulogic;
end package;
package body desilog is
function dg_boolToBit(bval : boolean) return std_ulogic is begin
if bval then
return '1';
else
return '0';
end if;
end function;
end;
|
-----------------------------------------------------------
--------- AUTOGENERATED FILE, DO NOT EDIT -----------------
-----------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package desilog is
subtype u8 is unsigned( 7 downto 0);
subtype u16 is unsigned(15 downto 0);
subtype u32 is unsigned(31 downto 0);
subtype u64 is unsigned(63 downto 0);
subtype u2 is unsigned( 1 downto 0);
subtype u4 is unsigned( 3 downto 0);
type string_ptr is access string;
--function str(a : unsigned) return string;
--function str(a : integer) return string;
function dg_boolToBit(bval : boolean) return std_ulogic;
end package;
package body desilog is
function dg_boolToBit(bval : boolean) return std_ulogic is begin
if bval then
return '1';
else
return '0';
end if;
end function;
end;
|
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use work.tce_util.all;
entity ffaccel_input_mux_2 is
generic (
BUSW_0 : integer := 32;
BUSW_1 : integer := 32;
DATAW : integer := 32);
port (
databus0 : in std_logic_vector(BUSW_0-1 downto 0);
databus1 : in std_logic_vector(BUSW_1-1 downto 0);
data : out std_logic_vector(DATAW-1 downto 0);
databus_cntrl : in std_logic_vector(0 downto 0));
end ffaccel_input_mux_2;
architecture rtl of ffaccel_input_mux_2 is
begin
-- If width of input bus is greater than width of output,
-- using the LSB bits.
-- If width of input bus is smaller than width of output,
-- using zero extension to generate extra bits.
sel : process (databus_cntrl, databus0, databus1)
begin
data <= (others => '0');
case databus_cntrl is
when "0" =>
data <= tce_ext(databus0, data'length);
when others =>
data <= tce_ext(databus1, data'length);
end case;
end process sel;
end rtl;
|
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use work.tce_util.all;
entity ffaccel_input_mux_2 is
generic (
BUSW_0 : integer := 32;
BUSW_1 : integer := 32;
DATAW : integer := 32);
port (
databus0 : in std_logic_vector(BUSW_0-1 downto 0);
databus1 : in std_logic_vector(BUSW_1-1 downto 0);
data : out std_logic_vector(DATAW-1 downto 0);
databus_cntrl : in std_logic_vector(0 downto 0));
end ffaccel_input_mux_2;
architecture rtl of ffaccel_input_mux_2 is
begin
-- If width of input bus is greater than width of output,
-- using the LSB bits.
-- If width of input bus is smaller than width of output,
-- using zero extension to generate extra bits.
sel : process (databus_cntrl, databus0, databus1)
begin
data <= (others => '0');
case databus_cntrl is
when "0" =>
data <= tce_ext(databus0, data'length);
when others =>
data <= tce_ext(databus1, data'length);
end case;
end process sel;
end rtl;
|
-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- created by: Veribest WaveBench Version 16.00.00.02
library work; use work.all;
library ieee_proposed; use ieee_proposed.electrical_systems.all;
library ieee; use ieee.std_logic_1164.all;
entity tb_volume_sensor is
end tb_volume_sensor;
architecture test_bench of tb_volume_sensor is
-- Component declarations
-- Signal declarations
signal clk, full, rst : std_logic;
terminal flow, minus_ref : electrical;
begin
-- Signal assignments
-- Component instances
vol1 : entity work.volume_sensor(structural)
port map(
clk => clk,
full => full,
rst => rst,
flow => flow,
minus_ref => minus_ref
);
vio : entity work.v_sine(ideal)
generic map(
freq => 1.0,
amplitude => 16.0
)
port map(
pos => flow,
neg => ELECTRICAL_REF
);
vm_ref : entity work.v_constant(ideal)
generic map(
level => -10.0
)
port map(
pos => minus_ref,
neg => ELECTRICAL_REF
);
-- Test code generation processes
-- clk
P_clk :
process
begin
clk <= '1';
wait for 500000.000 ns;
clk <= '0';
wait for 500000.000 ns;
end process P_clk;
-- rst
P_rst :
process
begin
wait for 0.0 ms; rst <= '0';
wait for 2.0 ms; rst <= '1';
wait for 2.0 ms; rst <= '0';
wait;
end process;
end test_bench;
|
-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- created by: Veribest WaveBench Version 16.00.00.02
library work; use work.all;
library ieee_proposed; use ieee_proposed.electrical_systems.all;
library ieee; use ieee.std_logic_1164.all;
entity tb_volume_sensor is
end tb_volume_sensor;
architecture test_bench of tb_volume_sensor is
-- Component declarations
-- Signal declarations
signal clk, full, rst : std_logic;
terminal flow, minus_ref : electrical;
begin
-- Signal assignments
-- Component instances
vol1 : entity work.volume_sensor(structural)
port map(
clk => clk,
full => full,
rst => rst,
flow => flow,
minus_ref => minus_ref
);
vio : entity work.v_sine(ideal)
generic map(
freq => 1.0,
amplitude => 16.0
)
port map(
pos => flow,
neg => ELECTRICAL_REF
);
vm_ref : entity work.v_constant(ideal)
generic map(
level => -10.0
)
port map(
pos => minus_ref,
neg => ELECTRICAL_REF
);
-- Test code generation processes
-- clk
P_clk :
process
begin
clk <= '1';
wait for 500000.000 ns;
clk <= '0';
wait for 500000.000 ns;
end process P_clk;
-- rst
P_rst :
process
begin
wait for 0.0 ms; rst <= '0';
wait for 2.0 ms; rst <= '1';
wait for 2.0 ms; rst <= '0';
wait;
end process;
end test_bench;
|
-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- created by: Veribest WaveBench Version 16.00.00.02
library work; use work.all;
library ieee_proposed; use ieee_proposed.electrical_systems.all;
library ieee; use ieee.std_logic_1164.all;
entity tb_volume_sensor is
end tb_volume_sensor;
architecture test_bench of tb_volume_sensor is
-- Component declarations
-- Signal declarations
signal clk, full, rst : std_logic;
terminal flow, minus_ref : electrical;
begin
-- Signal assignments
-- Component instances
vol1 : entity work.volume_sensor(structural)
port map(
clk => clk,
full => full,
rst => rst,
flow => flow,
minus_ref => minus_ref
);
vio : entity work.v_sine(ideal)
generic map(
freq => 1.0,
amplitude => 16.0
)
port map(
pos => flow,
neg => ELECTRICAL_REF
);
vm_ref : entity work.v_constant(ideal)
generic map(
level => -10.0
)
port map(
pos => minus_ref,
neg => ELECTRICAL_REF
);
-- Test code generation processes
-- clk
P_clk :
process
begin
clk <= '1';
wait for 500000.000 ns;
clk <= '0';
wait for 500000.000 ns;
end process P_clk;
-- rst
P_rst :
process
begin
wait for 0.0 ms; rst <= '0';
wait for 2.0 ms; rst <= '1';
wait for 2.0 ms; rst <= '0';
wait;
end process;
end test_bench;
|
----------------------------------------------------------------------------------
-- Project Name: Frecuency Counter
-- Target Devices: Spartan 3
-- Engineers: Ángel Larrañaga Muro
-- Nicolás Jurado Jiménez
-- Gonzalo Matarrubia Gonzalez
-- License: All files included in this proyect are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
----------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
ENTITY decoder_decoder_tb_vhd_tb IS
END decoder_decoder_tb_vhd_tb;
ARCHITECTURE behavior OF decoder_decoder_tb_vhd_tb IS
COMPONENT decoder
PORT(
code : IN std_logic_vector(3 DOWNTO 0);
led : OUT std_logic_vector(6 DOWNTO 0)
);
END COMPONENT;
SIGNAL code : std_logic_vector(3 DOWNTO 0);
SIGNAL led : std_logic_vector(6 DOWNTO 0);
TYPE vtest is record
code : std_logic_vector(3 DOWNTO 0);
led : std_logic_vector(6 DOWNTO 0);
END RECORD;
TYPE vtest_vector IS ARRAY (natural RANGE <>) OF vtest;
CONSTANT test: vtest_vector := (
(code => "0000", led => "0000001"),
(code => "0001", led => "1001111"),
(code => "0010", led => "0010010"),
(code => "0011", led => "0000110"),
(code => "0100", led => "1001100"),
(code => "0101", led => "0100100"),
(code => "0110", led => "0100000"),
(code => "0111", led => "0001111"),
(code => "1000", led => "0000000"),
(code => "1001", led => "0000100"),
(code => "1010", led => "1111110"),
(code => "1011", led => "1111110"),
(code => "1100", led => "1111110"),
(code => "1101", led => "1111110"),
(code => "1110", led => "1111110"),
(code => "1111", led => "1111110")
);
BEGIN
uut: decoder PORT MAP(
code => code,
led => led
);
tb: PROCESS
BEGIN
FOR i IN 0 TO test'HIGH LOOP
code <= test(i).code;
WAIT FOR 20 ns;
ASSERT led = test(i).led
REPORT "Salida incorrecta."
SEVERITY FAILURE;
END LOOP;
ASSERT false
REPORT "Simulacin finalizada. Test superado."
SEVERITY FAILURE;
END PROCESS;
END;
|
----------------------------------------------------------------------------------
-- Project Name: Frecuency Counter
-- Target Devices: Spartan 3
-- Engineers: Ángel Larrañaga Muro
-- Nicolás Jurado Jiménez
-- Gonzalo Matarrubia Gonzalez
-- License: All files included in this proyect are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
----------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
ENTITY decoder_decoder_tb_vhd_tb IS
END decoder_decoder_tb_vhd_tb;
ARCHITECTURE behavior OF decoder_decoder_tb_vhd_tb IS
COMPONENT decoder
PORT(
code : IN std_logic_vector(3 DOWNTO 0);
led : OUT std_logic_vector(6 DOWNTO 0)
);
END COMPONENT;
SIGNAL code : std_logic_vector(3 DOWNTO 0);
SIGNAL led : std_logic_vector(6 DOWNTO 0);
TYPE vtest is record
code : std_logic_vector(3 DOWNTO 0);
led : std_logic_vector(6 DOWNTO 0);
END RECORD;
TYPE vtest_vector IS ARRAY (natural RANGE <>) OF vtest;
CONSTANT test: vtest_vector := (
(code => "0000", led => "0000001"),
(code => "0001", led => "1001111"),
(code => "0010", led => "0010010"),
(code => "0011", led => "0000110"),
(code => "0100", led => "1001100"),
(code => "0101", led => "0100100"),
(code => "0110", led => "0100000"),
(code => "0111", led => "0001111"),
(code => "1000", led => "0000000"),
(code => "1001", led => "0000100"),
(code => "1010", led => "1111110"),
(code => "1011", led => "1111110"),
(code => "1100", led => "1111110"),
(code => "1101", led => "1111110"),
(code => "1110", led => "1111110"),
(code => "1111", led => "1111110")
);
BEGIN
uut: decoder PORT MAP(
code => code,
led => led
);
tb: PROCESS
BEGIN
FOR i IN 0 TO test'HIGH LOOP
code <= test(i).code;
WAIT FOR 20 ns;
ASSERT led = test(i).led
REPORT "Salida incorrecta."
SEVERITY FAILURE;
END LOOP;
ASSERT false
REPORT "Simulacin finalizada. Test superado."
SEVERITY FAILURE;
END PROCESS;
END;
|
-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: ch_11_fg_11_10.vhd,v 1.2 2001-10-26 16:29:35 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
architecture behavioral of bus_module is
begin
behavior : process is
-- . . .
-- not in book
constant Tdelay_synch : delay_length := 10 ns;
constant wait_delay : delay_length := 100 ns;
-- end not in book
begin
synch <= '0' after Tdelay_synch;
-- . . .
-- not in book
wait for wait_delay;
-- end not in book
-- ready to start operation
synch <= 'Z' after Tdelay_synch;
wait until synch = 'H';
-- . . . -- proceed with operation
-- . . .
end process behavior;
end architecture behavioral;
|
-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: ch_11_fg_11_10.vhd,v 1.2 2001-10-26 16:29:35 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
architecture behavioral of bus_module is
begin
behavior : process is
-- . . .
-- not in book
constant Tdelay_synch : delay_length := 10 ns;
constant wait_delay : delay_length := 100 ns;
-- end not in book
begin
synch <= '0' after Tdelay_synch;
-- . . .
-- not in book
wait for wait_delay;
-- end not in book
-- ready to start operation
synch <= 'Z' after Tdelay_synch;
wait until synch = 'H';
-- . . . -- proceed with operation
-- . . .
end process behavior;
end architecture behavioral;
|
-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: ch_11_fg_11_10.vhd,v 1.2 2001-10-26 16:29:35 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
architecture behavioral of bus_module is
begin
behavior : process is
-- . . .
-- not in book
constant Tdelay_synch : delay_length := 10 ns;
constant wait_delay : delay_length := 100 ns;
-- end not in book
begin
synch <= '0' after Tdelay_synch;
-- . . .
-- not in book
wait for wait_delay;
-- end not in book
-- ready to start operation
synch <= 'Z' after Tdelay_synch;
wait until synch = 'H';
-- . . . -- proceed with operation
-- . . .
end process behavior;
end architecture behavioral;
|
library ieee;
use ieee.std_logic_1164.all;
entity deserializer is
port (
clock : in std_logic;
sync : in std_logic;
rxd : in std_logic;
txd : out std_logic;
io : inout std_logic_vector(11 downto 0) );
end deserializer;
architecture gideon of deserializer is
signal index : integer range 0 to 31;
signal io_t : std_logic_vector(io'range) := (others => '0');
signal io_o : std_logic_vector(io'range) := (others => '0');
begin
process(clock)
begin
if rising_edge(clock) then
if sync='1' then
index <= 0;
elsif index /= 31 then
index <= index + 1;
end if;
if index <= io'high then
txd <= io(index);
else
txd <= '0';
end if;
if index <= io'high then
io_o(index) <= rxd;
elsif index < (2*io'length) then
io_t(index - io'length) <= rxd;
end if;
end if;
end process;
r_out: for i in io'range generate
io(i) <= io_o(i) when io_t(i)='1' else 'Z';
end generate;
end gideon;
|
library ieee;
use ieee.std_logic_1164.all;
entity deserializer is
port (
clock : in std_logic;
sync : in std_logic;
rxd : in std_logic;
txd : out std_logic;
io : inout std_logic_vector(11 downto 0) );
end deserializer;
architecture gideon of deserializer is
signal index : integer range 0 to 31;
signal io_t : std_logic_vector(io'range) := (others => '0');
signal io_o : std_logic_vector(io'range) := (others => '0');
begin
process(clock)
begin
if rising_edge(clock) then
if sync='1' then
index <= 0;
elsif index /= 31 then
index <= index + 1;
end if;
if index <= io'high then
txd <= io(index);
else
txd <= '0';
end if;
if index <= io'high then
io_o(index) <= rxd;
elsif index < (2*io'length) then
io_t(index - io'length) <= rxd;
end if;
end if;
end process;
r_out: for i in io'range generate
io(i) <= io_o(i) when io_t(i)='1' else 'Z';
end generate;
end gideon;
|
library ieee;
use ieee.std_logic_1164.all;
entity deserializer is
port (
clock : in std_logic;
sync : in std_logic;
rxd : in std_logic;
txd : out std_logic;
io : inout std_logic_vector(11 downto 0) );
end deserializer;
architecture gideon of deserializer is
signal index : integer range 0 to 31;
signal io_t : std_logic_vector(io'range) := (others => '0');
signal io_o : std_logic_vector(io'range) := (others => '0');
begin
process(clock)
begin
if rising_edge(clock) then
if sync='1' then
index <= 0;
elsif index /= 31 then
index <= index + 1;
end if;
if index <= io'high then
txd <= io(index);
else
txd <= '0';
end if;
if index <= io'high then
io_o(index) <= rxd;
elsif index < (2*io'length) then
io_t(index - io'length) <= rxd;
end if;
end if;
end process;
r_out: for i in io'range generate
io(i) <= io_o(i) when io_t(i)='1' else 'Z';
end generate;
end gideon;
|
library ieee;
use ieee.std_logic_1164.all;
entity deserializer is
port (
clock : in std_logic;
sync : in std_logic;
rxd : in std_logic;
txd : out std_logic;
io : inout std_logic_vector(11 downto 0) );
end deserializer;
architecture gideon of deserializer is
signal index : integer range 0 to 31;
signal io_t : std_logic_vector(io'range) := (others => '0');
signal io_o : std_logic_vector(io'range) := (others => '0');
begin
process(clock)
begin
if rising_edge(clock) then
if sync='1' then
index <= 0;
elsif index /= 31 then
index <= index + 1;
end if;
if index <= io'high then
txd <= io(index);
else
txd <= '0';
end if;
if index <= io'high then
io_o(index) <= rxd;
elsif index < (2*io'length) then
io_t(index - io'length) <= rxd;
end if;
end if;
end process;
r_out: for i in io'range generate
io(i) <= io_o(i) when io_t(i)='1' else 'Z';
end generate;
end gideon;
|
library ieee;
use ieee.std_logic_1164.all;
entity deserializer is
port (
clock : in std_logic;
sync : in std_logic;
rxd : in std_logic;
txd : out std_logic;
io : inout std_logic_vector(11 downto 0) );
end deserializer;
architecture gideon of deserializer is
signal index : integer range 0 to 31;
signal io_t : std_logic_vector(io'range) := (others => '0');
signal io_o : std_logic_vector(io'range) := (others => '0');
begin
process(clock)
begin
if rising_edge(clock) then
if sync='1' then
index <= 0;
elsif index /= 31 then
index <= index + 1;
end if;
if index <= io'high then
txd <= io(index);
else
txd <= '0';
end if;
if index <= io'high then
io_o(index) <= rxd;
elsif index < (2*io'length) then
io_t(index - io'length) <= rxd;
end if;
end if;
end process;
r_out: for i in io'range generate
io(i) <= io_o(i) when io_t(i)='1' else 'Z';
end generate;
end gideon;
|
architecture RTL of FIFO is
function func1 (
a : integer;
constant b : integer;
signal c : std_logic;
variable v : std_logic;
file f : std_logic
) return integer;
-- Violations
function func1 (
a : integer;
constant b : integer;
signal c : std_logic;
variable v : std_logic;
file f : std_logic
) return integer;
begin
end architecture RTL;
|
--------------------------------------------------------------------------------
--
-- FIFO Generator v8.4 Core - core wrapper
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2009 - 2010 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--------------------------------------------------------------------------------
--
-- Filename: ssd_command_fifo_top.vhd
--
-- Description:
-- This is the FIFO core wrapper with BUFG instances for clock connections.
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
library unisim;
use unisim.vcomponents.all;
--------------------------------------------------------------------------------
-- Entity Declaration
--------------------------------------------------------------------------------
entity ssd_command_fifo_top is
PORT (
CLK : IN std_logic;
DATA_COUNT : OUT std_logic_vector(7-1 DOWNTO 0);
RST : IN std_logic;
WR_EN : IN std_logic;
RD_EN : IN std_logic;
DIN : IN std_logic_vector(128-1 DOWNTO 0);
DOUT : OUT std_logic_vector(128-1 DOWNTO 0);
FULL : OUT std_logic;
EMPTY : OUT std_logic);
end ssd_command_fifo_top;
architecture xilinx of ssd_command_fifo_top is
SIGNAL clk_i : std_logic;
component ssd_command_fifo is
PORT (
CLK : IN std_logic;
DATA_COUNT : OUT std_logic_vector(7-1 DOWNTO 0);
RST : IN std_logic;
WR_EN : IN std_logic;
RD_EN : IN std_logic;
DIN : IN std_logic_vector(128-1 DOWNTO 0);
DOUT : OUT std_logic_vector(128-1 DOWNTO 0);
FULL : OUT std_logic;
EMPTY : OUT std_logic);
end component;
begin
clk_buf: bufg
PORT map(
i => CLK,
o => clk_i
);
fg0 : ssd_command_fifo PORT MAP (
CLK => clk_i,
DATA_COUNT => data_count,
RST => rst,
WR_EN => wr_en,
RD_EN => rd_en,
DIN => din,
DOUT => dout,
FULL => full,
EMPTY => empty);
end xilinx;
|
--------------------------------------------------------------------------------
--
-- FIFO Generator v8.4 Core - core wrapper
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2009 - 2010 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--------------------------------------------------------------------------------
--
-- Filename: ssd_command_fifo_top.vhd
--
-- Description:
-- This is the FIFO core wrapper with BUFG instances for clock connections.
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
library unisim;
use unisim.vcomponents.all;
--------------------------------------------------------------------------------
-- Entity Declaration
--------------------------------------------------------------------------------
entity ssd_command_fifo_top is
PORT (
CLK : IN std_logic;
DATA_COUNT : OUT std_logic_vector(7-1 DOWNTO 0);
RST : IN std_logic;
WR_EN : IN std_logic;
RD_EN : IN std_logic;
DIN : IN std_logic_vector(128-1 DOWNTO 0);
DOUT : OUT std_logic_vector(128-1 DOWNTO 0);
FULL : OUT std_logic;
EMPTY : OUT std_logic);
end ssd_command_fifo_top;
architecture xilinx of ssd_command_fifo_top is
SIGNAL clk_i : std_logic;
component ssd_command_fifo is
PORT (
CLK : IN std_logic;
DATA_COUNT : OUT std_logic_vector(7-1 DOWNTO 0);
RST : IN std_logic;
WR_EN : IN std_logic;
RD_EN : IN std_logic;
DIN : IN std_logic_vector(128-1 DOWNTO 0);
DOUT : OUT std_logic_vector(128-1 DOWNTO 0);
FULL : OUT std_logic;
EMPTY : OUT std_logic);
end component;
begin
clk_buf: bufg
PORT map(
i => CLK,
o => clk_i
);
fg0 : ssd_command_fifo PORT MAP (
CLK => clk_i,
DATA_COUNT => data_count,
RST => rst,
WR_EN => wr_en,
RD_EN => rd_en,
DIN => din,
DOUT => dout,
FULL => full,
EMPTY => empty);
end xilinx;
|
-----------------------------------------------------------------------------
-- LEON3 Xilinx VC707 Demonstration design
------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2003 - 2008, Gaisler Research
-- Copyright (C) 2008 - 2014, Aeroflex Gaisler
-- Copyright (C) 2015 - 2016, Cobham Gaisler
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
library grlib, techmap;
use grlib.amba.all;
use grlib.devices.all;
use grlib.stdlib.all;
use techmap.gencomp.all;
use techmap.allclkgen.all;
library gaisler;
use gaisler.memctrl.all;
use gaisler.leon3.all;
use gaisler.uart.all;
use gaisler.misc.all;
use gaisler.i2c.all;
use gaisler.spi.all;
use gaisler.net.all;
use gaisler.jtag.all;
use gaisler.grusb.all;
use gaisler.can.all;
use gaisler.l2cache.all;
use gaisler.subsys.all;
-- pragma translate_off
use gaisler.sim.all;
library unisim;
use unisim.all;
-- pragma translate_on
library testgrouppolito;
use testgrouppolito.dprc_pkg.all;
library esa;
use esa.memoryctrl.all;
use work.config.all;
entity leon3mp is
generic (
fabtech : integer := CFG_FABTECH;
memtech : integer := CFG_MEMTECH;
padtech : integer := CFG_PADTECH;
clktech : integer := CFG_CLKTECH;
disas : integer := CFG_DISAS; -- Enable disassembly to console
dbguart : integer := CFG_DUART; -- Print UART on console
pclow : integer := CFG_PCLOW;
SIM_BYPASS_INIT_CAL : string := "OFF";
SIMULATION : string := "FALSE";
USE_MIG_INTERFACE_MODEL : boolean := false;
autonegotiation : integer := 1
);
port (
reset : in std_ulogic;
clk200p : in std_ulogic; -- 200 MHz clock
clk200n : in std_ulogic; -- 200 MHz clock
address : out std_logic_vector(25 downto 0);
data : inout std_logic_vector(15 downto 0);
oen : out std_ulogic;
writen : out std_ulogic;
romsn : out std_logic;
adv : out std_logic;
ddr3_dq : inout std_logic_vector(63 downto 0);
ddr3_dqs_p : inout std_logic_vector(7 downto 0);
ddr3_dqs_n : inout std_logic_vector(7 downto 0);
ddr3_addr : out std_logic_vector(13 downto 0);
ddr3_ba : out std_logic_vector(2 downto 0);
ddr3_ras_n : out std_logic;
ddr3_cas_n : out std_logic;
ddr3_we_n : out std_logic;
ddr3_reset_n : out std_logic;
ddr3_ck_p : out std_logic_vector(0 downto 0);
ddr3_ck_n : out std_logic_vector(0 downto 0);
ddr3_cke : out std_logic_vector(0 downto 0);
ddr3_cs_n : out std_logic_vector(0 downto 0);
ddr3_dm : out std_logic_vector(7 downto 0);
ddr3_odt : out std_logic_vector(0 downto 0);
dsurx : in std_ulogic;
dsutx : out std_ulogic;
dsuctsn : in std_ulogic;
dsurtsn : out std_ulogic;
button : in std_logic_vector(3 downto 0);
switch : inout std_logic_vector(4 downto 0);
led : out std_logic_vector(6 downto 0);
iic_scl : inout std_ulogic;
iic_sda : inout std_ulogic;
usb_refclk_opt : in std_logic;
usb_clkout : in std_logic;
usb_d : inout std_logic_vector(7 downto 0);
usb_nxt : in std_logic;
usb_stp : out std_logic;
usb_dir : in std_logic;
usb_resetn : out std_ulogic;
gtrefclk_p : in std_logic;
gtrefclk_n : in std_logic;
txp : out std_logic;
txn : out std_logic;
rxp : in std_logic;
rxn : in std_logic;
emdio : inout std_logic;
emdc : out std_ulogic;
eint : in std_ulogic;
erst : out std_ulogic;
can_txd : out std_logic_vector(0 to CFG_CAN_NUM-1);
can_rxd : in std_logic_vector(0 to CFG_CAN_NUM-1);
spi_data_out : in std_logic;
spi_data_in : out std_ulogic;
spi_data_cs_b : out std_ulogic;
spi_clk : out std_ulogic
);
end;
architecture rtl of leon3mp is
component sgmii_vc707
generic(
pindex : integer := 0;
paddr : integer := 0;
pmask : integer := 16#fff#;
abits : integer := 8;
autonegotiation : integer := 1;
pirq : integer := 0;
debugmem : integer := 0;
tech : integer := 0
);
port(
sgmiii : in eth_sgmii_in_type;
sgmiio : out eth_sgmii_out_type;
gmiii : out eth_in_type;
gmiio : in eth_out_type;
reset : in std_logic; -- Asynchronous reset for entire core.
apb_clk : in std_logic;
apb_rstn : in std_logic;
apbi : in apb_slv_in_type;
apbo : out apb_slv_out_type
);
end component;
component ahb2mig_7series
generic(
hindex : integer := 0;
haddr : integer := 0;
hmask : integer := 16#f00#;
pindex : integer := 0;
paddr : integer := 0;
pmask : integer := 16#fff#;
SIM_BYPASS_INIT_CAL : string := "OFF";
SIMULATION : string := "FALSE";
USE_MIG_INTERFACE_MODEL : boolean := false
);
port(
ddr3_dq : inout std_logic_vector(63 downto 0);
ddr3_dqs_p : inout std_logic_vector(7 downto 0);
ddr3_dqs_n : inout std_logic_vector(7 downto 0);
ddr3_addr : out std_logic_vector(13 downto 0);
ddr3_ba : out std_logic_vector(2 downto 0);
ddr3_ras_n : out std_logic;
ddr3_cas_n : out std_logic;
ddr3_we_n : out std_logic;
ddr3_reset_n : out std_logic;
ddr3_ck_p : out std_logic_vector(0 downto 0);
ddr3_ck_n : out std_logic_vector(0 downto 0);
ddr3_cke : out std_logic_vector(0 downto 0);
ddr3_cs_n : out std_logic_vector(0 downto 0);
ddr3_dm : out std_logic_vector(7 downto 0);
ddr3_odt : out std_logic_vector(0 downto 0);
ahbso : out ahb_slv_out_type;
ahbsi : in ahb_slv_in_type;
apbi : in apb_slv_in_type;
apbo : out apb_slv_out_type;
calib_done : out std_logic;
rst_n_syn : in std_logic;
rst_n_async : in std_logic;
clk_amba : in std_logic;
sys_clk_p : in std_logic;
sys_clk_n : in std_logic;
clk_ref_i : in std_logic;
ui_clk : out std_logic;
ui_clk_sync_rst : out std_logic
);
end component ;
component ddr_dummy
port (
ddr_dq : inout std_logic_vector(63 downto 0);
ddr_dqs : inout std_logic_vector(7 downto 0);
ddr_dqs_n : inout std_logic_vector(7 downto 0);
ddr_addr : out std_logic_vector(13 downto 0);
ddr_ba : out std_logic_vector(2 downto 0);
ddr_ras_n : out std_logic;
ddr_cas_n : out std_logic;
ddr_we_n : out std_logic;
ddr_reset_n : out std_logic;
ddr_ck_p : out std_logic_vector(0 downto 0);
ddr_ck_n : out std_logic_vector(0 downto 0);
ddr_cke : out std_logic_vector(0 downto 0);
ddr_cs_n : out std_logic_vector(0 downto 0);
ddr_dm : out std_logic_vector(7 downto 0);
ddr_odt : out std_logic_vector(0 downto 0)
);
end component ;
--constant maxahbm : integer := CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH+CFG_GRUSBHC+CFG_GRUSBDC+CFG_GRUSB_DCL;
constant maxahbm : integer := 16;
--constant maxahbs : integer := 1+CFG_DSU+CFG_MCTRL_LEON2+CFG_AHBROMEN+CFG_AHBRAMEN+2+CFG_GRUSBDC;
constant maxahbs : integer := 16;
constant maxapbs : integer := CFG_IRQ3_ENABLE+CFG_GPT_ENABLE+CFG_GRGPIO_ENABLE+CFG_AHBSTAT+CFG_AHBSTAT+CFG_GRUSBHC+CFG_GRUSBDC+CFG_PRC;
signal vcc, gnd : std_logic_vector(31 downto 0);
signal memi : memory_in_type;
signal memo : memory_out_type;
signal wpo : wprot_out_type;
signal sdi : sdctrl_in_type;
signal sdo : sdram_out_type;
signal sdo2, sdo3 : sdctrl_out_type;
signal apbi : apb_slv_in_type;
signal apbo : apb_slv_out_vector := (others => apb_none);
signal ahbsi : ahb_slv_in_type;
signal ahbso : ahb_slv_out_vector := (others => ahbs_none);
signal ahbmi : ahb_mst_in_type;
signal ahbmo : ahb_mst_out_vector := (others => ahbm_none);
signal mig_ahbsi : ahb_slv_in_type;
signal mig_ahbso : ahb_slv_out_type;
signal ui_clk : std_ulogic;
signal clkm : std_ulogic := '0';
signal rstn, rstraw, sdclkl : std_ulogic;
signal clk_200 : std_ulogic;
signal clk25, clk40, clk65 : std_ulogic;
signal cgi, cgi2, cgiu : clkgen_in_type;
signal cgo, cgo2, cgou : clkgen_out_type;
signal u1i, u2i, dui : uart_in_type;
signal u1o, u2o, duo : uart_out_type;
signal irqi : irq_in_vector(0 to CFG_NCPU-1);
signal irqo : irq_out_vector(0 to CFG_NCPU-1);
signal sysi : leon_dsu_stat_base_in_type;
signal syso : leon_dsu_stat_base_out_type;
signal perf : l3stat_in_type;
signal gmiii : eth_in_type;
signal gmiio : eth_out_type;
signal sgmiii : eth_sgmii_in_type;
signal sgmiio : eth_sgmii_out_type;
signal sgmiirst : std_logic;
signal ethernet_phy_int : std_logic;
signal rxd1 : std_logic;
signal txd1 : std_logic;
signal ethi : eth_in_type;
signal etho : eth_out_type;
signal egtx_clk :std_ulogic;
signal negtx_clk :std_ulogic;
signal gpti : gptimer_in_type;
signal gpto : gptimer_out_type;
signal gpioi : gpio_in_type;
signal gpioo : gpio_out_type;
signal clklock, elock, uclk ,ulock : std_ulogic;
signal lock, calib_done, clkml, lclk, rst, ndsuact : std_ulogic;
signal tck, tckn, tms, tdi, tdo : std_ulogic;
signal lcd_datal : std_logic_vector(11 downto 0);
signal lcd_hsyncl, lcd_vsyncl, lcd_del, lcd_reset_bl : std_ulogic;
signal i2ci, dvi_i2ci : i2c_in_type;
signal i2co, dvi_i2co : i2c_out_type;
signal spii : spi_in_type;
signal spio : spi_out_type;
signal slvsel : std_logic_vector(CFG_SPICTRL_SLVS-1 downto 0);
constant BOARD_FREQ : integer := 200000; -- input frequency in KHz
constant CPU_FREQ : integer := BOARD_FREQ * CFG_CLKMUL / CFG_CLKDIV; -- cpu frequency in KHz
signal stati : ahbstat_in_type;
signal fpi : grfpu_in_vector_type;
signal fpo : grfpu_out_vector_type;
signal dsurx_int : std_logic;
signal dsutx_int : std_logic;
signal dsuctsn_int : std_logic;
signal dsurtsn_int : std_logic;
signal dsu_sel : std_logic;
signal usbi : grusb_in_vector(0 downto 0);
signal usbo : grusb_out_vector(0 downto 0);
signal can_lrx, can_ltx : std_logic_vector(0 to 7);
signal clkref : std_logic;
signal migrstn : std_logic;
attribute keep : boolean;
attribute syn_keep : string;
attribute keep of clkm : signal is true;
attribute keep of uclk : signal is true;
begin
----------------------------------------------------------------------
--- Reset and Clock generation -------------------------------------
----------------------------------------------------------------------
vcc <= (others => '1'); gnd <= (others => '0');
cgi.pllctrl <= "00"; cgi.pllrst <= rstraw;
clk_gen : if (CFG_MIG_7SERIES = 0) generate
clk_pad_ds : clkpad_ds generic map (tech => padtech, level => sstl, voltage => x15v) port map (clk200p, clk200n, lclk);
clkgen0 : clkgen -- clock generator
generic map (clktech, CFG_CLKMUL, CFG_CLKDIV, CFG_MCTRL_SDEN,
CFG_CLK_NOFB, 0, 0, 0, BOARD_FREQ)
port map (lclk, lclk, clkm, open, open, open, open, cgi, cgo, open, open, open);
end generate;
reset_pad : inpad generic map (tech => padtech, level => cmos, voltage => x18v) port map (reset, rst);
rst0 : rstgen -- reset generator
generic map (acthigh => 1, syncin => 0)
port map (rst, clkm, lock, rstn, rstraw);
lock <= calib_done when CFG_MIG_7SERIES = 1 else cgo.clklock;
rst1 : rstgen -- reset generator
generic map (acthigh => 1)
port map (rst, clkm, lock, migrstn, open);
----------------------------------------------------------------------
--- AHB CONTROLLER --------------------------------------------------
----------------------------------------------------------------------
ahb0 : ahbctrl -- AHB arbiter/multiplexer
generic map (defmast => CFG_DEFMST, split => CFG_SPLIT,
rrobin => CFG_RROBIN, ioaddr => CFG_AHBIO, fpnpen => CFG_FPNPEN,
nahbm => maxahbm, nahbs => maxahbs, devid => XILINX_VC707)
port map (rstn, clkm, ahbmi, ahbmo, ahbsi, ahbso);
----------------------------------------------------------------------
--- LEON processor and DSU -----------------------------------------
----------------------------------------------------------------------
leon : leon_dsu_stat_base
generic map (
leon => CFG_LEON, ncpu => CFG_NCPU, fabtech => fabtech, memtech => memtech,
nwindows => CFG_NWIN, dsu => CFG_DSU, fpu => CFG_FPU, v8 => CFG_V8, cp => 0,
mac => CFG_MAC, pclow => pclow, notag => 0, nwp => CFG_NWP, icen => CFG_ICEN,
irepl => CFG_IREPL, isets => CFG_ISETS, ilinesize => CFG_ILINE,
isetsize => CFG_ISETSZ, isetlock => CFG_ILOCK, dcen => CFG_DCEN,
drepl => CFG_DREPL, dsets => CFG_DSETS, dlinesize => CFG_DLINE,
dsetsize => CFG_DSETSZ, dsetlock => CFG_DLOCK, dsnoop => CFG_DSNOOP,
ilram => CFG_ILRAMEN, ilramsize => CFG_ILRAMSZ, ilramstart => CFG_ILRAMADDR,
dlram => CFG_DLRAMEN, dlramsize => CFG_DLRAMSZ, dlramstart => CFG_DLRAMADDR,
mmuen => CFG_MMUEN, itlbnum => CFG_ITLBNUM, dtlbnum => CFG_DTLBNUM,
tlb_type => CFG_TLB_TYPE, tlb_rep => CFG_TLB_REP, lddel => CFG_LDDEL,
disas => disas, tbuf => CFG_ITBSZ, pwd => CFG_PWD, svt => CFG_SVT,
rstaddr => CFG_RSTADDR, smp => CFG_NCPU-1, cached => CFG_DFIXED,
wbmask => CFG_BWMASK, busw => CFG_CACHEBW, netlist => CFG_LEON_NETLIST,
ft => CFG_LEONFT_EN, npasi => CFG_NP_ASI, pwrpsr => CFG_WRPSR,
rex => CFG_REX, altwin => CFG_ALTWIN, grfpush => CFG_GRFPUSH,
dsu_hindex => 2, dsu_haddr => 16#D00#, dsu_hmask => 16#F00#, atbsz => CFG_ATBSZ,
stat => CFG_STAT_ENABLE, stat_pindex => 8, stat_paddr => 16#100#,
stat_pmask => 16#ffc#, stat_ncnt => CFG_STAT_CNT, stat_nmax => CFG_STAT_NMAX)
port map (
rstn => rstn, ahbclk => clkm, cpuclk => clkm, hclken => vcc(0),
leon_ahbmi => ahbmi, leon_ahbmo => ahbmo(CFG_NCPU-1 downto 0),
leon_ahbsi => ahbsi, leon_ahbso => ahbso,
irqi => irqi, irqo => irqo,
stat_apbi => apbi, stat_apbo => apbo(8), stat_ahbsi => ahbsi,
stati => perf,
dsu_ahbsi => ahbsi, dsu_ahbso => ahbso(2),
dsu_tahbmi => ahbmi, dsu_tahbsi => ahbsi,
sysi => sysi, syso => syso);
led1_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (led(1), syso.proc_error);
sysi.dsu_enable <= '1';
dsui_break_pad : inpad generic map (level => cmos, voltage => x18v, tech => padtech)
port map (button(3), sysi.dsu_break);
dsuact_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (led(0), ndsuact);
ndsuact <= not syso.dsu_active;
-- Debug UART
dcomgen : if CFG_AHB_UART = 1 generate
dcom0 : ahbuart
generic map (hindex => CFG_NCPU, pindex => 7, paddr => 7)
port map (rstn, clkm, dui, duo, apbi, apbo(7), ahbmi, ahbmo(CFG_NCPU));
dui.extclk <= '0';
end generate;
nouah : if CFG_AHB_UART = 0 generate
apbo(7) <= apb_none;
duo.txd <= '0';
duo.rtsn <= '0';
dui.extclk <= '0';
end generate;
sw4_pad : iopad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (switch(4), '0', '1', dsu_sel);
dsutx_int <= duo.txd when dsu_sel = '1' else u1o.txd;
dui.rxd <= dsurx_int when dsu_sel = '1' else '1';
u1i.rxd <= dsurx_int when dsu_sel = '0' else '1';
dsurtsn_int <= duo.rtsn when dsu_sel = '1' else u1o.rtsn;
dui.ctsn <= dsuctsn_int when dsu_sel = '1' else '1';
u1i.ctsn <= dsuctsn_int when dsu_sel = '0' else '1';
dsurx_pad : inpad generic map (level => cmos, voltage => x18v, tech => padtech) port map (dsurx, dsurx_int);
dsutx_pad : outpad generic map (level => cmos, voltage => x18v, tech => padtech) port map (dsutx, dsutx_int);
dsuctsn_pad : inpad generic map (level => cmos, voltage => x18v, tech => padtech) port map (dsuctsn, dsuctsn_int);
dsurtsn_pad : outpad generic map (level => cmos, voltage => x18v, tech => padtech) port map (dsurtsn, dsurtsn_int);
ahbjtaggen0 :if CFG_AHB_JTAG = 1 generate
ahbjtag0 : ahbjtag generic map(tech => fabtech, hindex => CFG_NCPU+1)
port map(rstn, clkm, tck, tms, tdi, tdo, ahbmi, ahbmo(CFG_NCPU+1),
open, open, open, open, open, open, open, gnd(0));
end generate;
nojtag : if CFG_AHB_JTAG = 0 generate ahbmo(CFG_NCPU+1) <= ahbm_none; end generate;
----------------------------------------------------------------------
--- Memory controller ----------------------------------------------
----------------------------------------------------------------------
memi.writen <= '1'; memi.wrn <= "1111"; memi.bwidth <= "01";
memi.brdyn <= '0'; memi.bexcn <= '1';
mctrl_gen : if CFG_MCTRL_LEON2 /= 0 generate
mctrl0 : mctrl generic map (hindex => 0, pindex => 0,
paddr => 0, srbanks => 2, ram8 => CFG_MCTRL_RAM8BIT,
ram16 => CFG_MCTRL_RAM16BIT, sden => CFG_MCTRL_SDEN,
invclk => CFG_CLK_NOFB, sepbus => CFG_MCTRL_SEPBUS,
pageburst => CFG_MCTRL_PAGE, rammask => 0, iomask => 0)
port map (rstn, clkm, memi, memo, ahbsi, ahbso(0), apbi, apbo(0), wpo, sdo);
addr_pad : outpadv generic map (width => 26, tech => padtech, level => cmos, voltage => x18v)
port map (address(25 downto 0), memo.address(26 downto 1));
roms_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (romsn, memo.romsn(0));
oen_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (oen, memo.oen);
adv_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (adv, '0');
wri_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (writen, memo.writen);
data_pad : iopadvv generic map (tech => padtech, width => 16, level => cmos, voltage => x18v)
port map (data(15 downto 0), memo.data(31 downto 16),
memo.vbdrive(31 downto 16), memi.data(31 downto 16));
end generate;
nomctrl : if CFG_MCTRL_LEON2 = 0 generate
roms_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (romsn, vcc(0)); --ahbso(0) <= ahbso_none;
end generate;
-----------------------------------------------------------------------------
-- L2 cache, optionally covering DDR3 SDRAM memory controller
-----------------------------------------------------------------------------
l2cen : if CFG_L2_EN /= 0 generate
l2cblock : block
signal mem_ahbsi : ahb_slv_in_type;
signal mem_ahbso : ahb_slv_out_vector := (others => ahbs_none);
signal mem_ahbmi : ahb_mst_in_type;
signal mem_ahbmo : ahb_mst_out_vector := (others => ahbm_none);
signal l2c_stato : std_logic_vector(10 downto 0);
begin
l2c0 : l2c generic map (
hslvidx => 4, hmstidx => 0, cen => CFG_L2_PEN,
haddr => 16#400#, hmask => 16#c00#, ioaddr => 16#FF0#,
cached => CFG_L2_MAP, repl => CFG_L2_RAN, ways => CFG_L2_WAYS,
linesize => CFG_L2_LSZ, waysize => CFG_L2_SIZE,
memtech => memtech, bbuswidth => AHBDW,
bioaddr => 16#FFE#, biomask => 16#fff#,
sbus => 0, mbus => 1, arch => CFG_L2_SHARE,
ft => CFG_L2_EDAC)
port map(rst => rstn, clk => clkm, ahbsi => ahbsi, ahbso => ahbso(4),
ahbmi => mem_ahbmi, ahbmo => mem_ahbmo(0), ahbsov => mem_ahbso,
sto => l2c_stato);
memahb0 : ahbctrl -- AHB arbiter/multiplexer
generic map (defmast => CFG_DEFMST, split => CFG_SPLIT,
rrobin => CFG_RROBIN, ioaddr => 16#FFE#,
ioen => 1, nahbm => 1, nahbs => 1)
port map (rstn, clkm, mem_ahbmi, mem_ahbmo, mem_ahbsi, mem_ahbso);
mem_ahbso(0) <= mig_ahbso;
mig_ahbsi <= mem_ahbsi;
perf.event(15 downto 7) <= (others => '0');
perf.esource(15 downto 7) <= (others => (others => '0'));
perf.event(6) <= l2c_stato(10); -- Data uncorrectable error
perf.event(5) <= l2c_stato(9); -- Data correctable error
perf.event(4) <= l2c_stato(8); -- Tag uncorrectable error
perf.event(3) <= l2c_stato(7); -- Tag correctable error
perf.event(2) <= l2c_stato(2); -- Bus access
perf.event(1) <= l2c_stato(1); -- Miss
perf.event(0) <= l2c_stato(0); -- Hit
perf.esource(6 downto 3) <= (others => (others => '0'));
perf.esource(2 downto 0) <= (others => l2c_stato(6 downto 3));
perf.req <= (others => '0');
perf.sel <= (others => '0');
perf.latcnt <= '0';
--perf.timer <= dbgi(0).timer(31 downto 0);
end block l2cblock;
end generate l2cen;
nol2c : if CFG_L2_EN = 0 generate
ahbso(4) <= mig_ahbso;
mig_ahbsi <= ahbsi;
perf <= l3stat_in_none;
end generate;
----------------------------------------------------------------------
--- DDR3 memory controller ------------------------------------------
----------------------------------------------------------------------
mig_gen : if (CFG_MIG_7SERIES = 1) generate
gen_mig : if (USE_MIG_INTERFACE_MODEL /= true) generate
ddrc : ahb2mig_7series generic map (
hindex => 4*(1-CFG_L2_EN), haddr => 16#400#, hmask => 16#F00#,
pindex => 4, paddr => 4,
SIM_BYPASS_INIT_CAL => SIM_BYPASS_INIT_CAL,
SIMULATION => SIMULATION, USE_MIG_INTERFACE_MODEL => USE_MIG_INTERFACE_MODEL)
port map (
ddr3_dq => ddr3_dq,
ddr3_dqs_p => ddr3_dqs_p,
ddr3_dqs_n => ddr3_dqs_n,
ddr3_addr => ddr3_addr,
ddr3_ba => ddr3_ba,
ddr3_ras_n => ddr3_ras_n,
ddr3_cas_n => ddr3_cas_n,
ddr3_we_n => ddr3_we_n,
ddr3_reset_n => ddr3_reset_n,
ddr3_ck_p => ddr3_ck_p,
ddr3_ck_n => ddr3_ck_n,
ddr3_cke => ddr3_cke,
ddr3_cs_n => ddr3_cs_n,
ddr3_dm => ddr3_dm,
ddr3_odt => ddr3_odt,
ahbsi => mig_ahbsi,
ahbso => mig_ahbso,
apbi => apbi,
apbo => apbo(4),
calib_done => calib_done,
rst_n_syn => migrstn,
rst_n_async => rstraw,
clk_amba => clkm,
sys_clk_p => clk200p,
sys_clk_n => clk200n,
clk_ref_i => clkref,
ui_clk => clkm,
ui_clk_sync_rst => open
);
clkgenmigref0 : clkgen
generic map (clktech, 16, 8, 0,CFG_CLK_NOFB, 0, 0, 0, 100000)
port map (clkm, clkm, clkref, open, open, open, open, cgi, cgo, open, open, open);
end generate gen_mig;
gen_mig_model : if (USE_MIG_INTERFACE_MODEL = true) generate
-- pragma translate_off
mig_ahbram : ahbram_sim
generic map (
hindex => 4*(1-CFG_L2_EN),
haddr => 16#400#,
hmask => 16#C00#,
tech => 0,
kbytes => 1000,
pipe => 0,
maccsz => AHBDW,
fname => "ram.srec"
)
port map(
rst => rstn,
clk => clkm,
ahbsi => mig_ahbsi,
ahbso => mig_ahbso
);
ddr3_dq <= (others => 'Z');
ddr3_dqs_p <= (others => 'Z');
ddr3_dqs_n <= (others => 'Z');
ddr3_addr <= (others => '0');
ddr3_ba <= (others => '0');
ddr3_ras_n <= '0';
ddr3_cas_n <= '0';
ddr3_we_n <= '0';
ddr3_reset_n <= '1';
ddr3_ck_p <= (others => '0');
ddr3_ck_n <= (others => '0');
ddr3_cke <= (others => '0');
ddr3_cs_n <= (others => '0');
ddr3_dm <= (others => '0');
ddr3_odt <= (others => '0');
calib_done <= '1';
clkm <= not clkm after 5.0 ns;
-- pragma translate_on
end generate gen_mig_model;
end generate;
no_mig_gen : if (CFG_MIG_7SERIES = 0) generate
ahbram0 : ahbram
generic map (hindex => 4*(1-CFG_L2_EN), haddr => 16#400#, tech => CFG_MEMTECH, kbytes => 128)
port map ( rstn, clkm, mig_ahbsi, mig_ahbso);
ddrdummy0 : ddr_dummy
port map (
ddr_dq => ddr3_dq,
ddr_dqs => ddr3_dqs_p,
ddr_dqs_n => ddr3_dqs_n,
ddr_addr => ddr3_addr,
ddr_ba => ddr3_ba,
ddr_ras_n => ddr3_ras_n,
ddr_cas_n => ddr3_cas_n,
ddr_we_n => ddr3_we_n,
ddr_reset_n => ddr3_reset_n,
ddr_ck_p => ddr3_ck_p,
ddr_ck_n => ddr3_ck_n,
ddr_cke => ddr3_cke,
ddr_cs_n => ddr3_cs_n,
ddr_dm => ddr3_dm,
ddr_odt => ddr3_odt
);
calib_done <= '1';
end generate no_mig_gen;
led2_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (led(2), calib_done);
led3_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (led(3), lock);
-----------------------------------------------------------------------
--- ETHERNET ---------------------------------------------------------
-----------------------------------------------------------------------
eth0 : if CFG_GRETH = 1 generate -- Gaisler ethernet MAC
e1 : grethm
generic map(
hindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG,
pindex => 14, paddr => 16#C00#, pmask => 16#C00#, pirq => 5, memtech => memtech,
mdcscaler => CPU_FREQ/1000, rmii => 0, enable_mdio => 1, fifosize => CFG_ETH_FIFO,
nsync => 2, edcl => CFG_DSU_ETH, edclbufsz => CFG_ETH_BUF, phyrstadr => 7,
macaddrh => CFG_ETH_ENM, macaddrl => CFG_ETH_ENL, enable_mdint => 1,
ipaddrh => CFG_ETH_IPM, ipaddrl => CFG_ETH_IPL,
giga => CFG_GRETH1G, ramdebug => 0, gmiimode => 1)
port map( rst => rstn, clk => clkm, ahbmi => ahbmi,
ahbmo => ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG),
apbi => apbi, apbo => apbo(14), ethi => gmiii, etho => gmiio);
sgmiirst <= not rstraw;
sgmii0 : sgmii_vc707
generic map(
pindex => 11,
paddr => 16#010#,
pmask => 16#ff0#,
abits => 8,
autonegotiation => autonegotiation,
pirq => 11,
debugmem => 1,
tech => fabtech
)
port map(
sgmiii => sgmiii,
sgmiio => sgmiio,
gmiii => gmiii,
gmiio => gmiio,
reset => sgmiirst,
apb_clk => clkm,
apb_rstn => rstn,
apbi => apbi,
apbo => apbo(11)
);
emdio_pad : iopad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (emdio, sgmiio.mdio_o, sgmiio.mdio_oe, sgmiii.mdio_i);
emdc_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (emdc, sgmiio.mdc);
eint_pad : inpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (eint, sgmiii.mdint);
erst_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (erst, sgmiio.reset);
sgmiii.clkp <= gtrefclk_p;
sgmiii.clkn <= gtrefclk_n;
txp <= sgmiio.txp;
txn <= sgmiio.txn;
sgmiii.rxp <= rxp;
sgmiii.rxn <= rxn;
end generate;
noeth0 : if CFG_GRETH = 0 generate
-- TODO:
end generate;
-----------------------------------------------------------------------
--- CAN --------------------------------------------------------------
-----------------------------------------------------------------------
can0 : if CFG_CAN = 1 generate
can0 : can_mc
generic map (slvndx => 6, ioaddr => CFG_CANIO,
iomask => 16#FF0#, irq => CFG_CANIRQ, memtech => memtech,
ncores => CFG_CAN_NUM, sepirq => CFG_CANSEPIRQ)
port map (rstn, clkm, ahbsi, ahbso(6), can_lrx, can_ltx );
can_pads : for i in 0 to CFG_CAN_NUM-1 generate
can_tx_pad : outpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (can_txd(i), can_ltx(i));
can_rx_pad : inpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (can_rxd(i), can_lrx(i));
end generate;
end generate;
ncan : if CFG_CAN = 0 generate ahbso(6) <= ahbs_none; end generate;
-------------------------------------------------------------------------------
-- USB ------------------------------------------------------------------------
-------------------------------------------------------------------------------
-- Note that more than one USB component can not be instantiated at the same
-- time (board has only one USB transceiver), therefore they share AHB
-- master/slave indexes
-----------------------------------------------------------------------------
-- Shared pads
-----------------------------------------------------------------------------
usbpads: if (CFG_GRUSBHC + CFG_GRUSBDC + CFG_GRUSB_DCL) /= 0 generate
-- Incoming 60 MHz clock from transceiver, arch 3 = through BUFGDLL or
-- arch 2 = through BUFG or similiar.
--usb_clkout_pad : clkpad
--generic map (tech => padtech, arch => 3)
--port map (usb_clkout, uclk, cgo.clklock, ulock);
usb_clkout_pad : clkpad generic map (tech => padtech, arch => 2) port map (usb_clkout,uclk);
usb_d_pad: iopadv
generic map(tech => padtech, width => 8)
port map (usb_d, usbo(0).dataout(7 downto 0), usbo(0).oen,
usbi(0).datain(7 downto 0));
usb_nxt_pad : inpad generic map (tech => padtech)
port map (usb_nxt, usbi(0).nxt);
usb_dir_pad : inpad generic map (tech => padtech)
port map (usb_dir, usbi(0).dir);
usb_resetn_pad : outpad generic map (tech => padtech)
port map (usb_resetn, usbo(0).reset);
usb_stp_pad : outpad generic map (tech => padtech)
port map (usb_stp, usbo(0).stp);
end generate usbpads;
nousb: if (CFG_GRUSBHC + CFG_GRUSBDC + CFG_GRUSB_DCL) = 0 generate
--ulock <= '1';
usb_resetn_pad : outpad generic map (tech => padtech, slew => 1)
port map (usb_resetn, '0');
usb_stp_pad : outpad generic map (tech => padtech, slew => 1)
port map (usb_stp, '0');
end generate nousb;
-----------------------------------------------------------------------------
-- USB 2.0 Host Controller
-----------------------------------------------------------------------------
usbhc0: if CFG_GRUSBHC = 1 generate
usbhc0 : grusbhc
generic map (
ehchindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH,
ehcpindex => 13, ehcpaddr => 13, ehcpirq => 3, ehcpmask => 16#fff#,
uhchindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH+1,
uhchsindex => 8, uhchaddr => 16#A00#, uhchmask => 16#fff#, uhchirq => 4, tech => fabtech,
memtech => memtech, ehcgen => CFG_GRUSBHC_EHC, uhcgen => CFG_GRUSBHC_UHC,
endian_conv => CFG_GRUSBHC_ENDIAN, be_regs => CFG_GRUSBHC_BEREGS,
be_desc => CFG_GRUSBHC_BEDESC, uhcblo => CFG_GRUSBHC_BLO,
bwrd => CFG_GRUSBHC_BWRD, vbusconf => CFG_GRUSBHC_VBUSCONF)
port map (
clkm,uclk,rstn,apbi,apbo(13),ahbmi,ahbsi,
ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH),
ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH+1
downto
CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH+1),
ahbso(8 downto 8),
usbo,usbi);
end generate usbhc0;
-----------------------------------------------------------------------------
-- USB 2.0 Device Controller
-----------------------------------------------------------------------------
usbdc0: if CFG_GRUSBDC = 1 generate
usbdc0: grusbdc
generic map(
hsindex => 8, hirq => 6, haddr => 16#004#, hmask => 16#FFC#,
hmindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH,
aiface => CFG_GRUSBDC_AIFACE, uiface => 1,
nepi => CFG_GRUSBDC_NEPI, nepo => CFG_GRUSBDC_NEPO,
i0 => CFG_GRUSBDC_I0, i1 => CFG_GRUSBDC_I1,
i2 => CFG_GRUSBDC_I2, i3 => CFG_GRUSBDC_I3,
i4 => CFG_GRUSBDC_I4, i5 => CFG_GRUSBDC_I5,
i6 => CFG_GRUSBDC_I6, i7 => CFG_GRUSBDC_I7,
i8 => CFG_GRUSBDC_I8, i9 => CFG_GRUSBDC_I9,
i10 => CFG_GRUSBDC_I10, i11 => CFG_GRUSBDC_I11,
i12 => CFG_GRUSBDC_I12, i13 => CFG_GRUSBDC_I13,
i14 => CFG_GRUSBDC_I14, i15 => CFG_GRUSBDC_I15,
o0 => CFG_GRUSBDC_O0, o1 => CFG_GRUSBDC_O1,
o2 => CFG_GRUSBDC_O2, o3 => CFG_GRUSBDC_O3,
o4 => CFG_GRUSBDC_O4, o5 => CFG_GRUSBDC_O5,
o6 => CFG_GRUSBDC_O6, o7 => CFG_GRUSBDC_O7,
o8 => CFG_GRUSBDC_O8, o9 => CFG_GRUSBDC_O9,
o10 => CFG_GRUSBDC_O10, o11 => CFG_GRUSBDC_O11,
o12 => CFG_GRUSBDC_O12, o13 => CFG_GRUSBDC_O13,
o14 => CFG_GRUSBDC_O14, o15 => CFG_GRUSBDC_O15,
memtech => memtech, keepclk => 1)
port map(
uclk => uclk,
usbi => usbi(0),
usbo => usbo(0),
hclk => clkm,
hrst => rstn,
ahbmi => ahbmi,
ahbmo => ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH),
ahbsi => ahbsi,
ahbso => ahbso(8)
);
end generate usbdc0;
-----------------------------------------------------------------------------
-- USB DCL
-----------------------------------------------------------------------------
usb_dcl0: if CFG_GRUSB_DCL = 1 generate
usb_dcl0: grusb_dcl
generic map (
hindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH,
memtech => memtech, keepclk => 1, uiface => 1)
port map (
uclk, usbi(0), usbo(0), clkm, rstn, ahbmi,
ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH));
end generate usb_dcl0;
----------------------------------------------------------------------
--- I2C Controller --------------------------------------------------
----------------------------------------------------------------------
--i2cm: if CFG_I2C_ENABLE = 1 generate -- I2C master
i2c0 : i2cmst generic map (pindex => 9, paddr => 9, pmask => 16#FFF#, pirq => 10, filter => 9)
port map (rstn, clkm, apbi, apbo(9), i2ci, i2co);
i2c_scl_pad : iopad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (iic_scl, i2co.scl, i2co.scloen, i2ci.scl);
i2c_sda_pad : iopad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (iic_sda, i2co.sda, i2co.sdaoen, i2ci.sda);
--end generate i2cm;
----------------------------------------------------------------------
--- APB Bridge and various periherals -------------------------------
----------------------------------------------------------------------
apb0 : apbctrl -- AHB/APB bridge
generic map (hindex => 1, haddr => CFG_APBADDR, hmask => 16#F00#, nslaves => 16)
port map (rstn, clkm, ahbsi, ahbso(1), apbi, apbo );
irqctrl : if CFG_IRQ3_ENABLE /= 0 generate
irqctrl0 : irqmp -- interrupt controller
generic map (pindex => 2, paddr => 2, ncpu => CFG_NCPU)
port map (rstn, clkm, apbi, apbo(2), irqo, irqi);
end generate;
irq3 : if CFG_IRQ3_ENABLE = 0 generate
x : for i in 0 to CFG_NCPU-1 generate
irqi(i).irl <= "0000";
end generate;
apbo(2) <= apb_none;
end generate;
gpt : if CFG_GPT_ENABLE /= 0 generate
timer0 : gptimer -- timer unit
generic map (pindex => 3, paddr => 3, pirq => CFG_GPT_IRQ,
sepirq => CFG_GPT_SEPIRQ, sbits => CFG_GPT_SW, ntimers => CFG_GPT_NTIM,
nbits => CFG_GPT_TW, wdog => CFG_GPT_WDOGEN*CFG_GPT_WDOG)
port map (rstn, clkm, apbi, apbo(3), gpti, gpto);
gpti <= gpti_dhalt_drive(syso.dsu_tstop);
end generate;
nogpt : if CFG_GPT_ENABLE = 0 generate apbo(3) <= apb_none; end generate;
gpio0 : if CFG_GRGPIO_ENABLE /= 0 generate -- GPIO unit
grgpio0: grgpio
generic map(pindex => 10, paddr => 10, imask => CFG_GRGPIO_IMASK, nbits => 7)
port map(rst => rstn, clk => clkm, apbi => apbi, apbo => apbo(10),
gpioi => gpioi, gpioo => gpioo);
pio_pads : for i in 0 to 3 generate
pio_pad : iopad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (switch(i), gpioo.dout(i), gpioo.oen(i), gpioi.din(i));
end generate;
pio_pads2 : for i in 4 to 5 generate
pio_pad : inpad generic map (tech => padtech, level => cmos, voltage => x18v)
port map (button(i-4), gpioi.din(i));
end generate;
end generate;
ua1 : if CFG_UART1_ENABLE /= 0 generate
uart1 : apbuart -- UART 1
generic map (pindex => 1, paddr => 1, pirq => 2, console => dbguart,
fifosize => CFG_UART1_FIFO)
port map (rstn, clkm, apbi, apbo(1), u1i, u1o);
u1i.extclk <= '0';
serrx_pad : outpad generic map (level => cmos, voltage => x18v, tech => padtech)
port map (led(5), rxd1);
sertx_pad : outpad generic map (level => cmos, voltage => x18v, tech => padtech)
port map (led(6), txd1);
end generate;
noua0 : if CFG_UART1_ENABLE = 0 generate apbo(1) <= apb_none; end generate;
spic: if CFG_SPICTRL_ENABLE = 1 generate -- SPI controller
spi1 : spictrl
generic map (pindex => 12, paddr => 12, pmask => 16#fff#, pirq => 12,
fdepth => CFG_SPICTRL_FIFO, slvselen => CFG_SPICTRL_SLVREG,
slvselsz => CFG_SPICTRL_SLVS, odmode => 0, netlist => 0,
syncram => CFG_SPICTRL_SYNCRAM, ft => CFG_SPICTRL_FT)
port map (rstn, clkm, apbi, apbo(12), spii, spio, slvsel);
spii.spisel <= '1'; -- Master only
miso_pad : inpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_data_out, spii.miso);
mosi_pad : outpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_data_in, spio.mosi);
sck_pad : outpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_clk, spio.sck);
slvsel_pad : outpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_data_cs_b, slvsel(0));
end generate spic;
nospi: if CFG_SPICTRL_ENABLE = 0 generate
miso_pad : inpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_data_out, spii.miso);
mosi_pad : outpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_data_in, vcc(0));
sck_pad : outpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_clk, gnd(0));
slvsel_pad : outpad generic map (level => cmos, voltage => x18v,tech => padtech)
port map (spi_data_cs_b, vcc(0));
end generate;
ahbs : if CFG_AHBSTAT = 1 generate -- AHB status register
stati <= ahbstat_in_none;
ahbstat0 : ahbstat generic map (pindex => 15, paddr => 15, pirq => 7,
nftslv => CFG_AHBSTATN)
port map (rstn, clkm, ahbmi, ahbsi, stati, apbi, apbo(15));
end generate;
-----------------------------------------------------------------------
--- AHB ROM ----------------------------------------------------------
-----------------------------------------------------------------------
bpromgen : if CFG_AHBROMEN /= 0 generate
brom : entity work.ahbrom
generic map (hindex => 7, haddr => CFG_AHBRODDR, pipe => CFG_AHBROPIP)
port map ( rstn, clkm, ahbsi, ahbso(7));
end generate;
-----------------------------------------------------------------------
--- AHB RAM ----------------------------------------------------------
-----------------------------------------------------------------------
ocram : if CFG_AHBRAMEN = 1 generate
ahbram0 : ahbram generic map (hindex => 5, haddr => CFG_AHBRADDR,
tech => CFG_MEMTECH, kbytes => CFG_AHBRSZ)
port map ( rstn, clkm, ahbsi, ahbso(5));
end generate;
-----------------------------------------------------------------------
--- DYNAMIC PARTIAL RECONFIGURATION ---------------------------------
-----------------------------------------------------------------------
prc : if CFG_PRC = 1 generate
p1 : dprc generic map(hindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH, pindex => 5, paddr => 5, cfg_clkmul => 4, cfg_clkdiv => 8, raw_freq => BOARD_FREQ, clk_sel => 0, edac_en => CFG_EDAC_EN,
pirq => 6, technology => CFG_FABTECH, crc_en => CFG_CRC_EN, words_block => CFG_WORDS_BLOCK, fifo_dcm_inst => CFG_DCM_FIFO, fifo_depth => CFG_DPR_FIFO)
port map( rstn => rstn, clkm => clkm, clkraw => clkm, clk100 => '0', ahbmi => ahbmi, ahbmo => ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH), apbi => apbi, apbo => apbo(5), rm_reset => open);
end generate;
-----------------------------------------------------------------------
--- Test report module ----------------------------------------------
-----------------------------------------------------------------------
-- pragma translate_off
test0 : ahbrep generic map (hindex => 3, haddr => 16#200#)
port map (rstn, clkm, ahbsi, ahbso(3));
-- pragma translate_on
-----------------------------------------------------------------------
--- Drive unused bus elements ---------------------------------------
-----------------------------------------------------------------------
nam1 : for i in (CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_GRETH+CFG_GRUSBDC+CFG_GRUSBHC*2+CFG_GRUSB_DCL+CFG_PRC) to NAHBMST-1 generate
ahbmo(i) <= ahbm_none;
end generate;
-----------------------------------------------------------------------
--- Boot message ----------------------------------------------------
-----------------------------------------------------------------------
-- pragma translate_off
x : report_design
generic map (
msg1 => "LEON3 Xilinx VC707 Demonstration design",
fabtech => tech_table(fabtech), memtech => tech_table(memtech),
mdel => 1
);
-- pragma translate_on
end;
|
library UNISIM;
use UNISIM.vcomponents.all;
library ieee;
use ieee.std_logic_1164.all;
entity clk_gen is
port(
sys_clk_p_i : in std_logic;
sys_clk_n_i : in std_logic;
sys_clk_o : out std_logic;
sys_clk_bufg_o : out std_logic
);
end clk_gen;
architecture syn of clk_gen is
-- Internal clock signal
signal s_sys_clk : std_logic;
begin
-- IBUFGDS: Differential Global Clock Input Buffer
-- Virtex-6
-- Xilinx HDL Language Template, version 13.4
cpm_ibufgds_clk_gen : IBUFGDS
generic map (
DIFF_TERM => FALSE, -- Differential Termination
IBUF_LOW_PWR => TRUE, -- Low power (TRUE) vs. performance (FALSE) setting for referenced I/O standards
IOSTANDARD => "DEFAULT"
)
port map (
O => s_sys_clk, -- Clock buffer output
I => sys_clk_p_i, -- Diff_p clock buffer input (connect directly to top-level port)
IB => sys_clk_n_i -- Diff_n clock buffer input (connect directly to top-level port)
);
sys_clk_o <= s_sys_clk;
-- BUFG: Global Clock Buffer
-- Virtex-6
-- Xilinx HDL Language Template, version 13.4
cmp_bufg_clk_gen : BUFG
port map (
O => sys_clk_bufg_o, -- 1-bit output: Clock buffer output
I => s_sys_clk -- 1-bit input: Clock buffer input
);
end syn;
|
package fifo_pkg is
end package;
package fifo_pkg is
end package;
|
--------------------------------------------------------------------------------
--
-- BLK MEM GEN v7.1 Core - Top-level core wrapper
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2006-2010 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--------------------------------------------------------------------------------
--
-- Filename: Instruction_Memory_exdes.vhd
--
-- Description:
-- This is the actual BMG core wrapper.
--
--------------------------------------------------------------------------------
-- Author: IP Solutions Division
--
-- History: August 31, 2005 - First Release
--------------------------------------------------------------------------------
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_ARITH.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
LIBRARY UNISIM;
USE UNISIM.VCOMPONENTS.ALL;
--------------------------------------------------------------------------------
-- Entity Declaration
--------------------------------------------------------------------------------
ENTITY Instruction_Memory_exdes IS
PORT (
--Inputs - Port A
WEA : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
ADDRA : IN STD_LOGIC_VECTOR(4 DOWNTO 0);
DINA : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
DOUTA : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
CLKA : IN STD_LOGIC
);
END Instruction_Memory_exdes;
ARCHITECTURE xilinx OF Instruction_Memory_exdes IS
COMPONENT BUFG IS
PORT (
I : IN STD_ULOGIC;
O : OUT STD_ULOGIC
);
END COMPONENT;
COMPONENT Instruction_Memory IS
PORT (
--Port A
WEA : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
ADDRA : IN STD_LOGIC_VECTOR(4 DOWNTO 0);
DINA : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
DOUTA : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
CLKA : IN STD_LOGIC
);
END COMPONENT;
SIGNAL CLKA_buf : STD_LOGIC;
SIGNAL CLKB_buf : STD_LOGIC;
SIGNAL S_ACLK_buf : STD_LOGIC;
BEGIN
bufg_A : BUFG
PORT MAP (
I => CLKA,
O => CLKA_buf
);
bmg0 : Instruction_Memory
PORT MAP (
--Port A
WEA => WEA,
ADDRA => ADDRA,
DINA => DINA,
DOUTA => DOUTA,
CLKA => CLKA_buf
);
END xilinx;
|
entity tb_rec08 is
end tb_rec08;
library ieee;
use ieee.std_logic_1164.all;
use work.rec08_pkg.all;
architecture behav of tb_rec08 is
signal inp : std_logic;
signal r : myrec;
begin
dut: entity work.rec08
port map (inp => inp, o => r);
process
begin
inp <= '1';
wait for 1 ns;
assert r = (a => "1", b => '0') severity failure;
inp <= '0';
wait for 1 ns;
assert r = (a => "0", b => '1') severity failure;
wait;
end process;
end behav;
|
-- $Id: tb_nexys3_fusp.vhd 1181 2019-07-08 17:00:50Z mueller $
-- SPDX-License-Identifier: GPL-3.0-or-later
-- Copyright 2011-2016 by Walter F.J. Mueller <[email protected]>
--
------------------------------------------------------------------------------
-- Module Name: tb_nexys3_fusp - sim
-- Description: Test bench for nexys3 (base+fusp)
--
-- Dependencies: simlib/simclk
-- simlib/simclkcnt
-- xlib/s6_cmt_sfs
-- rlink/tbcore/tbcore_rlink
-- tb_nexys3_core
-- serport/tb/serport_master_tb
-- nexys3_fusp_aif [UUT]
--
-- To test: generic, any nexys3_fusp_aif target
--
-- Target Devices: generic
-- Tool versions: xst 13.1-14.7; ghdl 0.29-0.33
--
-- Revision History:
-- Date Rev Version Comment
-- 2016-09-02 805 1.3.3 tbcore_rlink without CLK_STOP now
-- 2016-02-13 730 1.3.2 direct instantiation of tbcore_rlink
-- 2016-01-03 724 1.3.1 use serport/tb/serport_master_tb
-- 2015-04-12 666 1.3 use serport_master instead of serport_uart_rxtx
-- 2013-10-06 538 1.2 pll support, use clksys_vcodivide ect
-- 2011-12-23 444 1.1 new system clock scheme, new tbcore_rlink iface
-- 2011-11-25 432 1.0 Initial version (derived from tb_nexys2_fusp)
------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee.std_logic_textio.all;
use std.textio.all;
use work.slvtypes.all;
use work.rlinklib.all;
use work.xlib.all;
use work.nexys3lib.all;
use work.simlib.all;
use work.simbus.all;
use work.sys_conf.all;
entity tb_nexys3_fusp is
end tb_nexys3_fusp;
architecture sim of tb_nexys3_fusp is
signal CLKOSC : slbit := '0'; -- board clock (100 Mhz)
signal CLKCOM : slbit := '0'; -- communication clock
signal CLKCOM_CYCLE : integer := 0;
signal RESET : slbit := '0';
signal CLKDIV : slv2 := "00"; -- run with 1 clocks / bit !!
signal RXDATA : slv8 := (others=>'0');
signal RXVAL : slbit := '0';
signal RXERR : slbit := '0';
signal RXACT : slbit := '0';
signal TXDATA : slv8 := (others=>'0');
signal TXENA : slbit := '0';
signal TXBUSY : slbit := '0';
signal RX_HOLD : slbit := '0';
signal I_RXD : slbit := '1';
signal O_TXD : slbit := '1';
signal I_SWI : slv8 := (others=>'0');
signal I_BTN : slv5 := (others=>'0');
signal O_LED : slv8 := (others=>'0');
signal O_ANO_N : slv4 := (others=>'0');
signal O_SEG_N : slv8 := (others=>'0');
signal O_MEM_CE_N : slbit := '1';
signal O_MEM_BE_N : slv2 := (others=>'1');
signal O_MEM_WE_N : slbit := '1';
signal O_MEM_OE_N : slbit := '1';
signal O_MEM_ADV_N : slbit := '1';
signal O_MEM_CLK : slbit := '0';
signal O_MEM_CRE : slbit := '0';
signal I_MEM_WAIT : slbit := '0';
signal O_MEM_ADDR : slv23 := (others=>'Z');
signal IO_MEM_DATA : slv16 := (others=>'0');
signal O_PPCM_CE_N : slbit := '0';
signal O_PPCM_RST_N : slbit := '0';
signal O_FUSP_RTS_N : slbit := '0';
signal I_FUSP_CTS_N : slbit := '0';
signal I_FUSP_RXD : slbit := '1';
signal O_FUSP_TXD : slbit := '1';
signal UART_RESET : slbit := '0';
signal UART_RXD : slbit := '1';
signal UART_TXD : slbit := '1';
signal CTS_N : slbit := '0';
signal RTS_N : slbit := '0';
signal R_PORTSEL_SER : slbit := '0'; -- if 1 use alternate serport
signal R_PORTSEL_XON : slbit := '0'; -- if 1 use xon/xoff
constant sbaddr_portsel: slv8 := slv(to_unsigned( 8,8));
constant clock_period : Delay_length := 10 ns;
constant clock_offset : Delay_length := 200 ns;
begin
CLKGEN : simclk
generic map (
PERIOD => clock_period,
OFFSET => clock_offset)
port map (
CLK => CLKOSC
);
CLKGEN_COM : s6_cmt_sfs
generic map (
VCO_DIVIDE => sys_conf_clksys_vcodivide,
VCO_MULTIPLY => sys_conf_clksys_vcomultiply,
OUT_DIVIDE => sys_conf_clksys_outdivide,
CLKIN_PERIOD => 10.0,
CLKIN_JITTER => 0.01,
STARTUP_WAIT => false,
GEN_TYPE => sys_conf_clksys_gentype)
port map (
CLKIN => CLKOSC,
CLKFX => CLKCOM,
LOCKED => open
);
CLKCNT : simclkcnt port map (CLK => CLKCOM, CLK_CYCLE => CLKCOM_CYCLE);
TBCORE : entity work.tbcore_rlink
port map (
CLK => CLKCOM,
RX_DATA => TXDATA,
RX_VAL => TXENA,
RX_HOLD => RX_HOLD,
TX_DATA => RXDATA,
TX_ENA => RXVAL
);
RX_HOLD <= TXBUSY or RTS_N; -- back pressure for data flow to tb
N3CORE : entity work.tb_nexys3_core
port map (
I_SWI => I_SWI,
I_BTN => I_BTN,
O_MEM_CE_N => O_MEM_CE_N,
O_MEM_BE_N => O_MEM_BE_N,
O_MEM_WE_N => O_MEM_WE_N,
O_MEM_OE_N => O_MEM_OE_N,
O_MEM_ADV_N => O_MEM_ADV_N,
O_MEM_CLK => O_MEM_CLK,
O_MEM_CRE => O_MEM_CRE,
I_MEM_WAIT => I_MEM_WAIT,
O_MEM_ADDR => O_MEM_ADDR,
IO_MEM_DATA => IO_MEM_DATA
);
UUT : nexys3_fusp_aif
port map (
I_CLK100 => CLKOSC,
I_RXD => I_RXD,
O_TXD => O_TXD,
I_SWI => I_SWI,
I_BTN => I_BTN,
O_LED => O_LED,
O_ANO_N => O_ANO_N,
O_SEG_N => O_SEG_N,
O_MEM_CE_N => O_MEM_CE_N,
O_MEM_BE_N => O_MEM_BE_N,
O_MEM_WE_N => O_MEM_WE_N,
O_MEM_OE_N => O_MEM_OE_N,
O_MEM_ADV_N => O_MEM_ADV_N,
O_MEM_CLK => O_MEM_CLK,
O_MEM_CRE => O_MEM_CRE,
I_MEM_WAIT => I_MEM_WAIT,
O_MEM_ADDR => O_MEM_ADDR,
IO_MEM_DATA => IO_MEM_DATA,
O_PPCM_CE_N => O_PPCM_CE_N,
O_PPCM_RST_N => O_PPCM_RST_N,
O_FUSP_RTS_N => O_FUSP_RTS_N,
I_FUSP_CTS_N => I_FUSP_CTS_N,
I_FUSP_RXD => I_FUSP_RXD,
O_FUSP_TXD => O_FUSP_TXD
);
SERMSTR : entity work.serport_master_tb
generic map (
CDWIDTH => CLKDIV'length)
port map (
CLK => CLKCOM,
RESET => UART_RESET,
CLKDIV => CLKDIV,
ENAXON => R_PORTSEL_XON,
ENAESC => '0',
RXDATA => RXDATA,
RXVAL => RXVAL,
RXERR => RXERR,
RXOK => '1',
TXDATA => TXDATA,
TXENA => TXENA,
TXBUSY => TXBUSY,
RXSD => UART_RXD,
TXSD => UART_TXD,
RXRTS_N => RTS_N,
TXCTS_N => CTS_N
);
proc_port_mux: process (R_PORTSEL_SER, UART_TXD, CTS_N,
O_TXD, O_FUSP_TXD, O_FUSP_RTS_N)
begin
if R_PORTSEL_SER = '0' then -- use main board rs232, no flow cntl
I_RXD <= UART_TXD; -- write port 0 inputs
UART_RXD <= O_TXD; -- get port 0 outputs
RTS_N <= '0';
I_FUSP_RXD <= '1'; -- port 1 inputs to idle state
I_FUSP_CTS_N <= '0';
else -- otherwise use pmod1 rs232
I_FUSP_RXD <= UART_TXD; -- write port 1 inputs
I_FUSP_CTS_N <= CTS_N;
UART_RXD <= O_FUSP_TXD; -- get port 1 outputs
RTS_N <= O_FUSP_RTS_N;
I_RXD <= '1'; -- port 0 inputs to idle state
end if;
end process proc_port_mux;
proc_moni: process
variable oline : line;
begin
loop
wait until rising_edge(CLKCOM);
if RXERR = '1' then
writetimestamp(oline, CLKCOM_CYCLE, " : seen RXERR=1");
writeline(output, oline);
end if;
end loop;
end process proc_moni;
proc_simbus: process (SB_VAL)
begin
if SB_VAL'event and to_x01(SB_VAL)='1' then
if SB_ADDR = sbaddr_portsel then
R_PORTSEL_SER <= to_x01(SB_DATA(0));
R_PORTSEL_XON <= to_x01(SB_DATA(1));
end if;
end if;
end process proc_simbus;
end sim;
|
entity repro2 is
end;
architecture behav of repro2 is
-- AXI-Lite Interface signals
type address_channel is record
--DUT inputs
awaddr : bit_vector;
awvalid : bit;
end record;
type t_if is record
write_channel : address_channel;
end record;
subtype ST_IF_32 is t_if (
write_channel (
awaddr(31 downto 0) )
);
signal s : st_if_32;
begin
s.write_channel.awaddr <= x"0000_1000", x"1000_ffff" after 2 ns;
process
begin
wait for 1 ns;
assert s.write_channel.awvalid = '0';
assert s.write_channel.awaddr(12) = '1';
wait for 2 ns;
assert s.write_channel.awaddr(14) = '1';
wait;
end process;
end;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc306.vhd,v 1.2 2001-10-26 16:30:25 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c03s01b04x00p04n01i00306ent IS
END c03s01b04x00p04n01i00306ent;
ARCHITECTURE c03s01b04x00p04n01i00306arch OF c03s01b04x00p04n01i00306ent IS
type REAL5 is range B"000" to B"111"; -- Failure_here
-- ERROR - SEMANTIC ERROR: RANGE CONSTRAINT IN FLOATING POINT TYPE
-- DEFINITION MUST BE OF FLOATING POINT TYPE
BEGIN
TESTING: PROCESS
BEGIN
assert FALSE
report "***FAILED TEST: c03s01b04x00p04n01i00306 - Range constraint must be floating point."
severity ERROR;
wait;
END PROCESS TESTING;
END c03s01b04x00p04n01i00306arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc306.vhd,v 1.2 2001-10-26 16:30:25 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c03s01b04x00p04n01i00306ent IS
END c03s01b04x00p04n01i00306ent;
ARCHITECTURE c03s01b04x00p04n01i00306arch OF c03s01b04x00p04n01i00306ent IS
type REAL5 is range B"000" to B"111"; -- Failure_here
-- ERROR - SEMANTIC ERROR: RANGE CONSTRAINT IN FLOATING POINT TYPE
-- DEFINITION MUST BE OF FLOATING POINT TYPE
BEGIN
TESTING: PROCESS
BEGIN
assert FALSE
report "***FAILED TEST: c03s01b04x00p04n01i00306 - Range constraint must be floating point."
severity ERROR;
wait;
END PROCESS TESTING;
END c03s01b04x00p04n01i00306arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc306.vhd,v 1.2 2001-10-26 16:30:25 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c03s01b04x00p04n01i00306ent IS
END c03s01b04x00p04n01i00306ent;
ARCHITECTURE c03s01b04x00p04n01i00306arch OF c03s01b04x00p04n01i00306ent IS
type REAL5 is range B"000" to B"111"; -- Failure_here
-- ERROR - SEMANTIC ERROR: RANGE CONSTRAINT IN FLOATING POINT TYPE
-- DEFINITION MUST BE OF FLOATING POINT TYPE
BEGIN
TESTING: PROCESS
BEGIN
assert FALSE
report "***FAILED TEST: c03s01b04x00p04n01i00306 - Range constraint must be floating point."
severity ERROR;
wait;
END PROCESS TESTING;
END c03s01b04x00p04n01i00306arch;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package mux_types_pkg is
type mux_input_t is array(natural range <>) of std_logic_vector;
end package;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
use work.constants.all;
use work.mux_types_pkg.all;
entity mux is
generic(
WIDTH: integer := XLEN;
PORTS: integer := 2
);
port(
I_inputs: in mux_input_t(PORTS-1 downto 0)(WIDTH-1 downto 0);
I_sel: in integer range 0 to PORTS-1;
O_output: out std_logic_vector(WIDTH-1 downto 0)
);
end mux;
architecture Behavioral of mux is
begin
O_output <= I_inputs(I_sel);
end Behavioral; |
--
-- BananaCore - A processor written in VHDL
--
-- Created by Rogiel Sulzbach.
-- Copyright (c) 2014-2015 Rogiel Sulzbach. All rights reserved.
--
library ieee;
use ieee.numeric_std.all;
use ieee.std_logic_1164.all;
use ieee.std_logic_1164.std_logic;
library BananaCore;
use BananaCore.Core.all;
use BananaCore.Memory.all;
use BananaCore.RegisterPackage.all;
-- The BitwiseOrInstructionExecutor entity
entity BitwiseOrInstructionExecutor is
port(
-- the processor main clock
clock: in BananaCore.Core.Clock;
-- enables the instruction
enable: in std_logic;
-- the first register to operate on (argument 0)
arg0_address: in RegisterAddress;
-- the first register to operate on (argument 1)
arg1_address: in RegisterAddress;
-- a bus indicating if the instruction is ready or not
instruction_ready: out std_logic := '0';
------------------------------------------
-- MEMORY BUS
------------------------------------------
-- the address to read/write memory from/to
memory_address: out MemoryAddress := (others => '0');
-- the memory being read to
memory_data_read: in MemoryData;
-- the memory being written to
memory_data_write: out MemoryData := (others => '0');
-- the operation to perform on the memory
memory_operation: out MemoryOperation := MEMORY_OP_DISABLED;
-- a flag indicating if a memory operation should be performed
memory_enable: out std_logic;
-- a flag indicating if a memory operation has completed
memory_ready: in std_logic;
------------------------------------------
-- REGISTER BUS
------------------------------------------
-- the processor register address bus
register_address: out RegisterAddress := (others => '0');
-- the processor register data bus
register_data_read: in RegisterData;
-- the processor register data bus
register_data_write: out RegisterData := (others => '0');
-- the processor register operation signal
register_operation: out RegisterOperation := OP_REG_DISABLED;
-- the processor register enable signal
register_enable: out std_logic := '0';
-- a flag indicating if a register operation has completed
register_ready: in std_logic
);
end BitwiseOrInstructionExecutor;
architecture BitwiseOrInstructionExecutorImpl of BitwiseOrInstructionExecutor is
type state_type is (
fetch_arg0,
store_arg0,
fetch_arg1,
store_arg1,
execute,
store_result,
complete
);
signal state: state_type := fetch_arg0;
signal arg0: RegisterData;
signal arg1: RegisterData;
signal result: RegisterData;
begin
process (clock) begin
if clock'event and clock = '1' then
if enable = '1' then
case state is
when fetch_arg0 =>
instruction_ready <= '0';
register_address <= arg0_address;
register_operation <= OP_REG_GET;
register_enable <= '1';
state <= store_arg0;
when store_arg0 =>
if register_ready = '1' then
arg0 <= register_data_read;
register_enable <= '0';
state <= fetch_arg1;
else
state <= store_arg0;
end if;
when fetch_arg1 =>
register_address <= arg1_address;
register_operation <= OP_REG_GET;
register_enable <= '1';
state <= store_arg1;
when store_arg1 =>
if register_ready = '1' then
arg1 <= register_data_read;
register_enable <= '0';
state <= execute;
else
state <= store_arg1;
end if;
when execute =>
result <= arg0 or arg1;
state <= store_result;
when store_result =>
register_address <= AccumulatorRegister;
register_operation <= OP_REG_SET;
register_data_write <= result;
register_enable <= '1';
instruction_ready <= '1';
state <= complete;
when complete =>
state <= complete;
end case;
else
instruction_ready <= '0';
state <= fetch_arg0;
end if;
end if;
end process;
end BitwiseOrInstructionExecutorImpl;
|
-- ____ _ _
-- / ___| ___ _ _ _ __ __| | __ _ __ _| |_ ___ ___
-- \___ \ / _ \| | | | '_ \ / _` |/ _` |/ _` | __/ _ \/ __|
-- ___) | (_) | |_| | | | | (_| | (_| | (_| | || __/\__ \
-- |____/ \___/ \__,_|_| |_|\__,_|\__, |\__,_|\__\___||___/
-- |___/
-- ======================================================================
--
-- title: VHDL module - hwt_sawtooth
--
-- project: PG-Soundgates
-- author: Hendrik Hangmann, University of Paderborn
--
-- description: Hardware thread for a sawtooth wave
--
-- ======================================================================
library ieee;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
--library proc_common_v3_00_a;
--use proc_common_v3_00_a.proc_common_pkg.all;
library reconos_v3_00_c;
use reconos_v3_00_c.reconos_pkg.all;
library soundgates_v1_00_a;
use soundgates_v1_00_a.soundgates_common_pkg.all;
use soundgates_v1_00_a.soundgates_reconos_pkg.all;
entity hwt_sawtooth is
generic(
SND_COMP_CLK_FREQ : integer := 100_000_000
);
port (
-- OSIF FIFO ports
OSIF_FIFO_Sw2Hw_Data : in std_logic_vector(31 downto 0);
OSIF_FIFO_Sw2Hw_Fill : in std_logic_vector(15 downto 0);
OSIF_FIFO_Sw2Hw_Empty : in std_logic;
OSIF_FIFO_Sw2Hw_RE : out std_logic;
OSIF_FIFO_Hw2Sw_Data : out std_logic_vector(31 downto 0);
OSIF_FIFO_Hw2Sw_Rem : in std_logic_vector(15 downto 0);
OSIF_FIFO_Hw2Sw_Full : in std_logic;
OSIF_FIFO_Hw2Sw_WE : out std_logic;
-- MEMIF FIFO ports
MEMIF_FIFO_Hwt2Mem_Data : out std_logic_vector(31 downto 0);
MEMIF_FIFO_Hwt2Mem_Rem : in std_logic_vector(15 downto 0);
MEMIF_FIFO_Hwt2Mem_Full : in std_logic;
MEMIF_FIFO_Hwt2Mem_WE : out std_logic;
MEMIF_FIFO_Mem2Hwt_Data : in std_logic_vector(31 downto 0);
MEMIF_FIFO_Mem2Hwt_Fill : in std_logic_vector(15 downto 0);
MEMIF_FIFO_Mem2Hwt_Empty : in std_logic;
MEMIF_FIFO_Mem2Hwt_RE : out std_logic;
HWT_Clk : in std_logic;
HWT_Rst : in std_logic
);
end hwt_sawtooth;
architecture Behavioral of hwt_sawtooth is
----------------------------------------------------------------
-- Subcomponent declarations
----------------------------------------------------------------
component sawtooth is
port(
clk : in std_logic;
rst : in std_logic;
ce : in std_logic;
incr : in signed(31 downto 0);
offset : in signed(31 downto 0);
saw : out signed(31 downto 0)
);
end component;
signal clk : std_logic;
signal rst : std_logic;
-- ReconOS Stuff
signal i_osif : i_osif_t;
signal o_osif : o_osif_t;
signal i_memif : i_memif_t;
signal o_memif : o_memif_t;
signal i_ram : i_ram_t;
signal o_ram : o_ram_t;
constant MBOX_START : std_logic_vector(31 downto 0) := x"00000000";
constant MBOX_FINISH : std_logic_vector(31 downto 0) := x"00000001";
-- /ReconOS Stuff
type STATE_TYPE is (STATE_INIT, STATE_WAITING, STATE_REFRESH_INPUT_PHASE_OFFSET, STATE_REFRESH_INPUT_PHASE_INCR, STATE_PROCESS, STATE_WRITE_MEM, STATE_NOTIFY, STATE_EXIT);
signal state : STATE_TYPE;
----------------------------------------------------------------
-- Common sound component signals, constants and types
----------------------------------------------------------------
constant C_MAX_SAMPLE_COUNT : integer := 64;
-- define size of local RAM here
constant C_LOCAL_RAM_SIZE : integer := C_MAX_SAMPLE_COUNT;
constant C_LOCAL_RAM_ADDRESS_WIDTH : integer := 6;--clog2(C_LOCAL_RAM_SIZE);
constant C_LOCAL_RAM_SIZE_IN_BYTES : integer := 4*C_LOCAL_RAM_SIZE;
type LOCAL_MEMORY_T is array (0 to C_LOCAL_RAM_SIZE-1) of std_logic_vector(31 downto 0);
signal o_RAMAddr_saw : std_logic_vector(0 to C_LOCAL_RAM_ADDRESS_WIDTH-1);
signal o_RAMData_saw : std_logic_vector(0 to 31); -- saw to local ram
signal i_RAMData_saw : std_logic_vector(0 to 31); -- local ram to saw
signal o_RAMWE_saw : std_logic;
signal o_RAMAddr_reconos : std_logic_vector(0 to C_LOCAL_RAM_ADDRESS_WIDTH-1);
signal o_RAMAddr_reconos_2 : std_logic_vector(0 to 31);
signal o_RAMData_reconos : std_logic_vector(0 to 31);
signal o_RAMWE_reconos : std_logic;
signal i_RAMData_reconos : std_logic_vector(0 to 31);
signal osif_ctrl_signal : std_logic_vector(31 downto 0);
signal ignore : std_logic_vector(31 downto 0);
constant o_RAMAddr_max : std_logic_vector(0 to C_LOCAL_RAM_ADDRESS_WIDTH-1) := (others=>'1');
shared variable local_ram : LOCAL_MEMORY_T;
signal snd_comp_header : snd_comp_header_msg_t; -- common sound component header
signal sample_count : unsigned(15 downto 0) := to_unsigned(C_MAX_SAMPLE_COUNT, 16);
----------------------------------------------------------------
-- Component dependent signals
----------------------------------------------------------------
signal saw_ce : std_logic; -- saw clock enable (like a start/stop signal)
signal phase_offset_addr : std_logic_vector(31 downto 0);
signal phase_incr_addr : std_logic_vector(31 downto 0);
signal phase_offset : std_logic_vector(31 downto 0);
signal phase_incr : std_logic_vector(31 downto 0);
signal saw_data : signed(31 downto 0);
signal state_inner_process : std_logic;
----------------------------------------------------------------
-- OS Communication
----------------------------------------------------------------
constant saw_START : std_logic_vector(31 downto 0) := x"0000000F";
constant saw_EXIT : std_logic_vector(31 downto 0) := x"000000F0";
begin
-----------------------------------
-- Hard wirings
-----------------------------------
clk <= HWT_Clk;
rst <= HWT_Rst;
o_RAMData_saw <= std_logic_vector(saw_data);
o_RAMAddr_reconos(0 to C_LOCAL_RAM_ADDRESS_WIDTH-1) <= o_RAMAddr_reconos_2((32-C_LOCAL_RAM_ADDRESS_WIDTH) to 31);
-- ReconOS Stuff
osif_setup (
i_osif,
o_osif,
OSIF_FIFO_Sw2Hw_Data,
OSIF_FIFO_Sw2Hw_Fill,
OSIF_FIFO_Sw2Hw_Empty,
OSIF_FIFO_Hw2Sw_Rem,
OSIF_FIFO_Hw2Sw_Full,
OSIF_FIFO_Sw2Hw_RE,
OSIF_FIFO_Hw2Sw_Data,
OSIF_FIFO_Hw2Sw_WE
);
memif_setup (
i_memif,
o_memif,
MEMIF_FIFO_Mem2Hwt_Data,
MEMIF_FIFO_Mem2Hwt_Fill,
MEMIF_FIFO_Mem2Hwt_Empty,
MEMIF_FIFO_Hwt2Mem_Rem,
MEMIF_FIFO_Hwt2Mem_Full,
MEMIF_FIFO_Mem2Hwt_RE,
MEMIF_FIFO_Hwt2Mem_Data,
MEMIF_FIFO_Hwt2Mem_WE
);
ram_setup (
i_ram,
o_ram,
o_RAMAddr_reconos_2,
o_RAMWE_reconos,
o_RAMData_reconos,
i_RAMData_reconos
);
-- /ReconOS Stuff
saw_inst : sawtooth
port map(
clk => clk,
rst => rst,
ce => saw_ce,
incr => signed(phase_incr),
offset => signed(phase_offset),
saw => saw_data
);
local_ram_ctrl_1 : process (clk) is
begin
if (rising_edge(clk)) then
if (o_RAMWE_reconos = '1') then
local_ram(to_integer(unsigned(o_RAMAddr_reconos))) := o_RAMData_reconos;
else
i_RAMData_reconos <= local_ram(to_integer(unsigned(o_RAMAddr_reconos)));
end if;
end if;
end process;
local_ram_ctrl_2 : process (clk) is
begin
if (rising_edge(clk)) then
if (o_RAMWE_saw = '1') then
local_ram(to_integer(unsigned(o_RAMAddr_saw))) := o_RAMData_saw;
--else -- else not needed, because saw is not consuming any samples
-- i_RAMData_saw <= local_ram(conv_integer(unsigned(o_RAMAddr_saw)));
end if;
end if;
end process;
saw_CTRL_FSM_PROC : process (clk, rst, o_osif, o_memif) is
variable done : boolean;
begin
if rst = '1' then
osif_reset(o_osif);
memif_reset(o_memif);
ram_reset(o_ram);
state <= STATE_INIT;
sample_count <= to_unsigned(C_MAX_SAMPLE_COUNT, 16);
osif_ctrl_signal <= (others => '0');
saw_ce <= '0';
o_RAMWE_saw <= '0';
state_inner_process <= '0';
done := False;
elsif rising_edge(clk) then
saw_ce <= '0';
o_RAMWE_saw <= '0';
osif_ctrl_signal <= ( others => '0');
case state is
-- INIT State gets the address of the header struct
when STATE_INIT =>
snd_comp_get_header(i_osif, o_osif, i_memif, o_memif, snd_comp_header, done);
if done then
-- Initialize your signals
phase_offset_addr <= snd_comp_header.opt_arg_addr;
phase_incr_addr <= std_logic_vector(unsigned(snd_comp_header.opt_arg_addr) + 4);
state <= STATE_WAITING;
end if;
when STATE_WAITING =>
-- Software process "Synthesizer" sends the start signal via mbox_start
osif_mbox_get(i_osif, o_osif, MBOX_START, osif_ctrl_signal, done);
if done then
if osif_ctrl_signal = saw_START then
sample_count <= to_unsigned(C_MAX_SAMPLE_COUNT, 16);
state <= STATE_REFRESH_INPUT_PHASE_OFFSET;
elsif osif_ctrl_signal = saw_EXIT then
state <= STATE_EXIT;
end if;
end if;
when STATE_REFRESH_INPUT_PHASE_OFFSET =>
memif_read_word(i_memif, o_memif, phase_offset_addr, phase_offset, done);
if done then
state <= STATE_REFRESH_INPUT_PHASE_INCR;
end if;
when STATE_REFRESH_INPUT_PHASE_INCR =>
memif_read_word(i_memif, o_memif, phase_incr_addr, phase_incr, done);
if done then
state <= STATE_PROCESS;
end if;
when STATE_PROCESS =>
if sample_count > 0 then
case state_inner_process is
when '0' =>
o_RAMWE_saw <= '1';
saw_ce <= '1'; -- ein takt früher
state_inner_process <= '1';
when '1' =>
o_RAMAddr_saw <= std_logic_vector(unsigned(o_RAMAddr_saw) + 1);
sample_count <= sample_count - 1;
state_inner_process <= '0';
when others =>
state_inner_process <= '0';
end case;
else
-- Samples have been generated
o_RAMAddr_saw <= (others => '0');
state <= STATE_WRITE_MEM;
end if;
when STATE_WRITE_MEM =>
memif_write(i_ram, o_ram, i_memif, o_memif, X"00000000", snd_comp_header.dest_addr, std_logic_vector(to_unsigned(C_LOCAL_RAM_SIZE_IN_BYTES,24)), done);
if done then
state <= STATE_NOTIFY;
end if;
when STATE_NOTIFY =>
osif_mbox_put(i_osif, o_osif, MBOX_FINISH, snd_comp_header.dest_addr, ignore, done);
if done then
state <= STATE_WAITING;
end if;
when STATE_EXIT =>
osif_thread_exit(i_osif,o_osif);
end case;
end if;
end process;
end Behavioral;
-- ====================================
-- = RECONOS Function Library - Copy and Paste!
-- ====================================
-- osif_mbox_put(i_osif, o_osif, MBOX_NAME, SOURCESIGNAL, ignore, done);
-- osif_mbox_get(i_osif, o_osif, MBOX_NAME, TARGETSIGNAL, done);
-- Read from shared memory:
-- Speicherzugriffe:
-- Wortzugriff:
-- memif_read_word(i_memif, o_memif, addr, TARGETSIGNAL, done);
-- memif_write_word(i_memif, o_memif, addr, SOURCESIGNAL, done);
-- Die Laenge ist bei Speicherzugriffen Byte adressiert!
-- memif_read(i_ram, o_ram, i_memif, o_memif, SRC_ADDR std_logic_vector(31 downto 0);
-- dst_addr std_logic_vector(31 downto 0);
-- BYTES std_logic_vector(23 downto 0);
-- done);
-- memif_write(i_ram, o_ram, i_memif, o_memif,
-- src_addr : in std_logic_vector(31 downto 0),
-- dst_addr : in std_logic_vector(31 downto 0);
-- len : in std_logic_vector(23 downto 0);
-- done);
|
-- megafunction wizard: %RAM: 1-PORT%
-- GENERATION: STANDARD
-- VERSION: WM1.0
-- MODULE: altsyncram
-- ============================================================
-- File Name: ram_dq_PHASE_k.vhd
-- Megafunction Name(s):
-- altsyncram
--
-- Simulation Library Files(s):
-- altera_mf
-- ============================================================
-- ************************************************************
-- THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE!
--
-- 12.1 Build 243 01/31/2013 SP 1 SJ Full Version
-- ************************************************************
--Copyright (C) 1991-2012 Altera Corporation
--Your use of Altera Corporation's design tools, logic functions
--and other software and tools, and its AMPP partner logic
--functions, and any output files from any of the foregoing
--(including device programming or simulation files), and any
--associated documentation or information are expressly subject
--to the terms and conditions of the Altera Program License
--Subscription Agreement, Altera MegaCore Function License
--Agreement, or other applicable license agreement, including,
--without limitation, that your use is for the sole purpose of
--programming logic devices manufactured by Altera and sold by
--Altera or its authorized distributors. Please refer to the
--applicable agreement for further details.
LIBRARY ieee;
USE ieee.std_logic_1164.all;
LIBRARY altera_mf;
USE altera_mf.all;
ENTITY ram_dq_PHASE_k IS
PORT
(
address : IN STD_LOGIC_VECTOR (4 DOWNTO 0);
clock : IN STD_LOGIC := '1';
data : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
wren : IN STD_LOGIC ;
q : OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
);
END ram_dq_PHASE_k;
ARCHITECTURE SYN OF ram_dq_phase_k IS
SIGNAL sub_wire0 : STD_LOGIC_VECTOR (7 DOWNTO 0);
COMPONENT altsyncram
GENERIC (
clock_enable_input_a : STRING;
clock_enable_output_a : STRING;
intended_device_family : STRING;
lpm_hint : STRING;
lpm_type : STRING;
numwords_a : NATURAL;
operation_mode : STRING;
outdata_aclr_a : STRING;
outdata_reg_a : STRING;
power_up_uninitialized : STRING;
read_during_write_mode_port_a : STRING;
widthad_a : NATURAL;
width_a : NATURAL;
width_byteena_a : NATURAL
);
PORT (
address_a : IN STD_LOGIC_VECTOR (4 DOWNTO 0);
clock0 : IN STD_LOGIC ;
data_a : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
wren_a : IN STD_LOGIC ;
q_a : OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
);
END COMPONENT;
BEGIN
q <= sub_wire0(7 DOWNTO 0);
altsyncram_component : altsyncram
GENERIC MAP (
clock_enable_input_a => "BYPASS",
clock_enable_output_a => "BYPASS",
intended_device_family => "Cyclone III",
lpm_hint => "ENABLE_RUNTIME_MOD=YES,INSTANCE_NAME=PH_K",
lpm_type => "altsyncram",
numwords_a => 32,
operation_mode => "SINGLE_PORT",
outdata_aclr_a => "NONE",
outdata_reg_a => "CLOCK0",
power_up_uninitialized => "FALSE",
read_during_write_mode_port_a => "NEW_DATA_NO_NBE_READ",
widthad_a => 5,
width_a => 8,
width_byteena_a => 1
)
PORT MAP (
address_a => address,
clock0 => clock,
data_a => data,
wren_a => wren,
q_a => sub_wire0
);
END SYN;
-- ============================================================
-- CNX file retrieval info
-- ============================================================
-- Retrieval info: PRIVATE: ADDRESSSTALL_A NUMERIC "0"
-- Retrieval info: PRIVATE: AclrAddr NUMERIC "0"
-- Retrieval info: PRIVATE: AclrByte NUMERIC "0"
-- Retrieval info: PRIVATE: AclrData NUMERIC "0"
-- Retrieval info: PRIVATE: AclrOutput NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_ENABLE NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_SIZE NUMERIC "8"
-- Retrieval info: PRIVATE: BlankMemory NUMERIC "1"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_INPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_OUTPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: Clken NUMERIC "0"
-- Retrieval info: PRIVATE: DataBusSeparated NUMERIC "1"
-- Retrieval info: PRIVATE: IMPLEMENT_IN_LES NUMERIC "0"
-- Retrieval info: PRIVATE: INIT_FILE_LAYOUT STRING "PORT_A"
-- Retrieval info: PRIVATE: INIT_TO_SIM_X NUMERIC "0"
-- Retrieval info: PRIVATE: INTENDED_DEVICE_FAMILY STRING "Cyclone III"
-- Retrieval info: PRIVATE: JTAG_ENABLED NUMERIC "1"
-- Retrieval info: PRIVATE: JTAG_ID STRING "PH_K"
-- Retrieval info: PRIVATE: MAXIMUM_DEPTH NUMERIC "0"
-- Retrieval info: PRIVATE: MIFfilename STRING ""
-- Retrieval info: PRIVATE: NUMWORDS_A NUMERIC "32"
-- Retrieval info: PRIVATE: RAM_BLOCK_TYPE NUMERIC "0"
-- Retrieval info: PRIVATE: READ_DURING_WRITE_MODE_PORT_A NUMERIC "3"
-- Retrieval info: PRIVATE: RegAddr NUMERIC "1"
-- Retrieval info: PRIVATE: RegData NUMERIC "1"
-- Retrieval info: PRIVATE: RegOutput NUMERIC "1"
-- Retrieval info: PRIVATE: SYNTH_WRAPPER_GEN_POSTFIX STRING "0"
-- Retrieval info: PRIVATE: SingleClock NUMERIC "1"
-- Retrieval info: PRIVATE: UseDQRAM NUMERIC "1"
-- Retrieval info: PRIVATE: WRCONTROL_ACLR_A NUMERIC "0"
-- Retrieval info: PRIVATE: WidthAddr NUMERIC "5"
-- Retrieval info: PRIVATE: WidthData NUMERIC "8"
-- Retrieval info: PRIVATE: rden NUMERIC "0"
-- Retrieval info: LIBRARY: altera_mf altera_mf.altera_mf_components.all
-- Retrieval info: CONSTANT: CLOCK_ENABLE_INPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: CLOCK_ENABLE_OUTPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: INTENDED_DEVICE_FAMILY STRING "Cyclone III"
-- Retrieval info: CONSTANT: LPM_HINT STRING "ENABLE_RUNTIME_MOD=YES,INSTANCE_NAME=PH_K"
-- Retrieval info: CONSTANT: LPM_TYPE STRING "altsyncram"
-- Retrieval info: CONSTANT: NUMWORDS_A NUMERIC "32"
-- Retrieval info: CONSTANT: OPERATION_MODE STRING "SINGLE_PORT"
-- Retrieval info: CONSTANT: OUTDATA_ACLR_A STRING "NONE"
-- Retrieval info: CONSTANT: OUTDATA_REG_A STRING "CLOCK0"
-- Retrieval info: CONSTANT: POWER_UP_UNINITIALIZED STRING "FALSE"
-- Retrieval info: CONSTANT: READ_DURING_WRITE_MODE_PORT_A STRING "NEW_DATA_NO_NBE_READ"
-- Retrieval info: CONSTANT: WIDTHAD_A NUMERIC "5"
-- Retrieval info: CONSTANT: WIDTH_A NUMERIC "8"
-- Retrieval info: CONSTANT: WIDTH_BYTEENA_A NUMERIC "1"
-- Retrieval info: USED_PORT: address 0 0 5 0 INPUT NODEFVAL "address[4..0]"
-- Retrieval info: USED_PORT: clock 0 0 0 0 INPUT VCC "clock"
-- Retrieval info: USED_PORT: data 0 0 8 0 INPUT NODEFVAL "data[7..0]"
-- Retrieval info: USED_PORT: q 0 0 8 0 OUTPUT NODEFVAL "q[7..0]"
-- Retrieval info: USED_PORT: wren 0 0 0 0 INPUT NODEFVAL "wren"
-- Retrieval info: CONNECT: @address_a 0 0 5 0 address 0 0 5 0
-- Retrieval info: CONNECT: @clock0 0 0 0 0 clock 0 0 0 0
-- Retrieval info: CONNECT: @data_a 0 0 8 0 data 0 0 8 0
-- Retrieval info: CONNECT: @wren_a 0 0 0 0 wren 0 0 0 0
-- Retrieval info: CONNECT: q 0 0 8 0 @q_a 0 0 8 0
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.vhd TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.inc FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.cmp TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.bsf TRUE FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k_inst.vhd FALSE
-- Retrieval info: LIB_FILE: altera_mf
|
-- megafunction wizard: %RAM: 1-PORT%
-- GENERATION: STANDARD
-- VERSION: WM1.0
-- MODULE: altsyncram
-- ============================================================
-- File Name: ram_dq_PHASE_k.vhd
-- Megafunction Name(s):
-- altsyncram
--
-- Simulation Library Files(s):
-- altera_mf
-- ============================================================
-- ************************************************************
-- THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE!
--
-- 12.1 Build 243 01/31/2013 SP 1 SJ Full Version
-- ************************************************************
--Copyright (C) 1991-2012 Altera Corporation
--Your use of Altera Corporation's design tools, logic functions
--and other software and tools, and its AMPP partner logic
--functions, and any output files from any of the foregoing
--(including device programming or simulation files), and any
--associated documentation or information are expressly subject
--to the terms and conditions of the Altera Program License
--Subscription Agreement, Altera MegaCore Function License
--Agreement, or other applicable license agreement, including,
--without limitation, that your use is for the sole purpose of
--programming logic devices manufactured by Altera and sold by
--Altera or its authorized distributors. Please refer to the
--applicable agreement for further details.
LIBRARY ieee;
USE ieee.std_logic_1164.all;
LIBRARY altera_mf;
USE altera_mf.all;
ENTITY ram_dq_PHASE_k IS
PORT
(
address : IN STD_LOGIC_VECTOR (4 DOWNTO 0);
clock : IN STD_LOGIC := '1';
data : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
wren : IN STD_LOGIC ;
q : OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
);
END ram_dq_PHASE_k;
ARCHITECTURE SYN OF ram_dq_phase_k IS
SIGNAL sub_wire0 : STD_LOGIC_VECTOR (7 DOWNTO 0);
COMPONENT altsyncram
GENERIC (
clock_enable_input_a : STRING;
clock_enable_output_a : STRING;
intended_device_family : STRING;
lpm_hint : STRING;
lpm_type : STRING;
numwords_a : NATURAL;
operation_mode : STRING;
outdata_aclr_a : STRING;
outdata_reg_a : STRING;
power_up_uninitialized : STRING;
read_during_write_mode_port_a : STRING;
widthad_a : NATURAL;
width_a : NATURAL;
width_byteena_a : NATURAL
);
PORT (
address_a : IN STD_LOGIC_VECTOR (4 DOWNTO 0);
clock0 : IN STD_LOGIC ;
data_a : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
wren_a : IN STD_LOGIC ;
q_a : OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
);
END COMPONENT;
BEGIN
q <= sub_wire0(7 DOWNTO 0);
altsyncram_component : altsyncram
GENERIC MAP (
clock_enable_input_a => "BYPASS",
clock_enable_output_a => "BYPASS",
intended_device_family => "Cyclone III",
lpm_hint => "ENABLE_RUNTIME_MOD=YES,INSTANCE_NAME=PH_K",
lpm_type => "altsyncram",
numwords_a => 32,
operation_mode => "SINGLE_PORT",
outdata_aclr_a => "NONE",
outdata_reg_a => "CLOCK0",
power_up_uninitialized => "FALSE",
read_during_write_mode_port_a => "NEW_DATA_NO_NBE_READ",
widthad_a => 5,
width_a => 8,
width_byteena_a => 1
)
PORT MAP (
address_a => address,
clock0 => clock,
data_a => data,
wren_a => wren,
q_a => sub_wire0
);
END SYN;
-- ============================================================
-- CNX file retrieval info
-- ============================================================
-- Retrieval info: PRIVATE: ADDRESSSTALL_A NUMERIC "0"
-- Retrieval info: PRIVATE: AclrAddr NUMERIC "0"
-- Retrieval info: PRIVATE: AclrByte NUMERIC "0"
-- Retrieval info: PRIVATE: AclrData NUMERIC "0"
-- Retrieval info: PRIVATE: AclrOutput NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_ENABLE NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_SIZE NUMERIC "8"
-- Retrieval info: PRIVATE: BlankMemory NUMERIC "1"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_INPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_OUTPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: Clken NUMERIC "0"
-- Retrieval info: PRIVATE: DataBusSeparated NUMERIC "1"
-- Retrieval info: PRIVATE: IMPLEMENT_IN_LES NUMERIC "0"
-- Retrieval info: PRIVATE: INIT_FILE_LAYOUT STRING "PORT_A"
-- Retrieval info: PRIVATE: INIT_TO_SIM_X NUMERIC "0"
-- Retrieval info: PRIVATE: INTENDED_DEVICE_FAMILY STRING "Cyclone III"
-- Retrieval info: PRIVATE: JTAG_ENABLED NUMERIC "1"
-- Retrieval info: PRIVATE: JTAG_ID STRING "PH_K"
-- Retrieval info: PRIVATE: MAXIMUM_DEPTH NUMERIC "0"
-- Retrieval info: PRIVATE: MIFfilename STRING ""
-- Retrieval info: PRIVATE: NUMWORDS_A NUMERIC "32"
-- Retrieval info: PRIVATE: RAM_BLOCK_TYPE NUMERIC "0"
-- Retrieval info: PRIVATE: READ_DURING_WRITE_MODE_PORT_A NUMERIC "3"
-- Retrieval info: PRIVATE: RegAddr NUMERIC "1"
-- Retrieval info: PRIVATE: RegData NUMERIC "1"
-- Retrieval info: PRIVATE: RegOutput NUMERIC "1"
-- Retrieval info: PRIVATE: SYNTH_WRAPPER_GEN_POSTFIX STRING "0"
-- Retrieval info: PRIVATE: SingleClock NUMERIC "1"
-- Retrieval info: PRIVATE: UseDQRAM NUMERIC "1"
-- Retrieval info: PRIVATE: WRCONTROL_ACLR_A NUMERIC "0"
-- Retrieval info: PRIVATE: WidthAddr NUMERIC "5"
-- Retrieval info: PRIVATE: WidthData NUMERIC "8"
-- Retrieval info: PRIVATE: rden NUMERIC "0"
-- Retrieval info: LIBRARY: altera_mf altera_mf.altera_mf_components.all
-- Retrieval info: CONSTANT: CLOCK_ENABLE_INPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: CLOCK_ENABLE_OUTPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: INTENDED_DEVICE_FAMILY STRING "Cyclone III"
-- Retrieval info: CONSTANT: LPM_HINT STRING "ENABLE_RUNTIME_MOD=YES,INSTANCE_NAME=PH_K"
-- Retrieval info: CONSTANT: LPM_TYPE STRING "altsyncram"
-- Retrieval info: CONSTANT: NUMWORDS_A NUMERIC "32"
-- Retrieval info: CONSTANT: OPERATION_MODE STRING "SINGLE_PORT"
-- Retrieval info: CONSTANT: OUTDATA_ACLR_A STRING "NONE"
-- Retrieval info: CONSTANT: OUTDATA_REG_A STRING "CLOCK0"
-- Retrieval info: CONSTANT: POWER_UP_UNINITIALIZED STRING "FALSE"
-- Retrieval info: CONSTANT: READ_DURING_WRITE_MODE_PORT_A STRING "NEW_DATA_NO_NBE_READ"
-- Retrieval info: CONSTANT: WIDTHAD_A NUMERIC "5"
-- Retrieval info: CONSTANT: WIDTH_A NUMERIC "8"
-- Retrieval info: CONSTANT: WIDTH_BYTEENA_A NUMERIC "1"
-- Retrieval info: USED_PORT: address 0 0 5 0 INPUT NODEFVAL "address[4..0]"
-- Retrieval info: USED_PORT: clock 0 0 0 0 INPUT VCC "clock"
-- Retrieval info: USED_PORT: data 0 0 8 0 INPUT NODEFVAL "data[7..0]"
-- Retrieval info: USED_PORT: q 0 0 8 0 OUTPUT NODEFVAL "q[7..0]"
-- Retrieval info: USED_PORT: wren 0 0 0 0 INPUT NODEFVAL "wren"
-- Retrieval info: CONNECT: @address_a 0 0 5 0 address 0 0 5 0
-- Retrieval info: CONNECT: @clock0 0 0 0 0 clock 0 0 0 0
-- Retrieval info: CONNECT: @data_a 0 0 8 0 data 0 0 8 0
-- Retrieval info: CONNECT: @wren_a 0 0 0 0 wren 0 0 0 0
-- Retrieval info: CONNECT: q 0 0 8 0 @q_a 0 0 8 0
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.vhd TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.inc FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.cmp TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k.bsf TRUE FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL ram_dq_PHASE_k_inst.vhd FALSE
-- Retrieval info: LIB_FILE: altera_mf
|
---------------------------------------------------------------------------
--
-- Title: Hardware Thread User Logic Exit Thread
-- To be used as a place holder, and size estimate for HWTI
--
---------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
use IEEE.std_logic_misc.all;
library Unisim;
use Unisim.all;
---------------------------------------------------------------------------
-- Port declarations
---------------------------------------------------------------------------
-- Definition of Ports:
--
-- Misc. Signals
-- clock
--
-- HWTI to HWTUL interconnect
-- intrfc2thrd_address 32 bits memory
-- intrfc2thrd_value 32 bits memory function
-- intrfc2thrd_function 16 bits control
-- intrfc2thrd_goWait 1 bits control
--
-- HWTUL to HWTI interconnect
-- thrd2intrfc_address 32 bits memory
-- thrd2intrfc_value 32 bits memory function
-- thrd2intrfc_function 16 bits function
-- thrd2intrfc_opcode 6 bits memory function
--
---------------------------------------------------------------------------
-- Thread Manager Entity section
---------------------------------------------------------------------------
entity user_logic_hwtul is
port (
clock : in std_logic;
intrfc2thrd_address : in std_logic_vector(0 to 31);
intrfc2thrd_value : in std_logic_vector(0 to 31);
intrfc2thrd_function : in std_logic_vector(0 to 15);
intrfc2thrd_goWait : in std_logic;
thrd2intrfc_address : out std_logic_vector(0 to 31);
thrd2intrfc_value : out std_logic_vector(0 to 31);
thrd2intrfc_function : out std_logic_vector(0 to 15);
thrd2intrfc_opcode : out std_logic_vector(0 to 5)
);
end entity user_logic_hwtul;
---------------------------------------------------------------------------
-- Architecture section
---------------------------------------------------------------------------
architecture IMP of user_logic_hwtul is
---------------------------------------------------------------------------
-- Signal declarations
---------------------------------------------------------------------------
type state_machine is (
FUNCTION_RESET,
FUNCTION_USER_SELECT,
FUNCTION_START,
FUNCTION_EXIT,
STATE_1,
STATE_2,
STATE_3,
STATE_4,
STATE_5,
STATE_6,
STATE_7,
STATE_8,
STATE_9,
STATE_10,
STATE_11,
STATE_12,
STATE_13,
STATE_14,
STATE_15,
STATE_16,
STATE_17,
STATE_18,
STATE_19,
STATE_20,
WAIT_STATE,
ERROR_STATE);
-- Function definitions
constant U_FUNCTION_RESET : std_logic_vector(0 to 15) := x"0000";
constant U_FUNCTION_WAIT : std_logic_vector(0 to 15) := x"0001";
constant U_FUNCTION_USER_SELECT : std_logic_vector(0 to 15) := x"0002";
constant U_FUNCTION_START : std_logic_vector(0 to 15) := x"0003";
constant U_STATE_1 : std_logic_vector(0 to 15) := x"0101";
constant U_STATE_2 : std_logic_vector(0 to 15) := x"0102";
constant U_STATE_3 : std_logic_vector(0 to 15) := x"0103";
constant U_STATE_4 : std_logic_vector(0 to 15) := x"0104";
constant U_STATE_5 : std_logic_vector(0 to 15) := x"0105";
constant U_STATE_6 : std_logic_vector(0 to 15) := x"0106";
constant U_STATE_7 : std_logic_vector(0 to 15) := x"0107";
constant U_STATE_8 : std_logic_vector(0 to 15) := x"0108";
constant U_STATE_9 : std_logic_vector(0 to 15) := x"0109";
constant U_STATE_10 : std_logic_vector(0 to 15) := x"0110";
constant U_STATE_11 : std_logic_vector(0 to 15) := x"0111";
constant U_STATE_12 : std_logic_vector(0 to 15) := x"0112";
constant U_STATE_13 : std_logic_vector(0 to 15) := x"0113";
constant U_STATE_14 : std_logic_vector(0 to 15) := x"0114";
constant U_STATE_15 : std_logic_vector(0 to 15) := x"0115";
constant U_STATE_16 : std_logic_vector(0 to 15) := x"0116";
constant U_STATE_17 : std_logic_vector(0 to 15) := x"0117";
constant U_STATE_18 : std_logic_vector(0 to 15) := x"0118";
constant U_STATE_19 : std_logic_vector(0 to 15) := x"0119";
constant U_STATE_20 : std_logic_vector(0 to 15) := x"0120";
-- Range 0003 to 7999 reserved for user logic's state machine
-- Range 8000 to 9999 reserved for system calls
constant FUNCTION_HTHREAD_ATTR_INIT : std_logic_vector(0 to 15) := x"8000";
constant FUNCTION_HTHREAD_ATTR_DESTROY : std_logic_vector(0 to 15) := x"8001";
constant FUNCTION_HTHREAD_CREATE : std_logic_vector(0 to 15) := x"8010";
constant FUNCTION_HTHREAD_JOIN : std_logic_vector(0 to 15) := x"8011";
constant FUNCTION_HTHREAD_SELF : std_logic_vector(0 to 15) := x"8012";
constant FUNCTION_HTHREAD_YIELD : std_logic_vector(0 to 15) := x"8013";
constant FUNCTION_HTHREAD_EQUAL : std_logic_vector(0 to 15) := x"8014";
constant FUNCTION_HTHREAD_EXIT : std_logic_vector(0 to 15) := x"8015";
constant FUNCTION_HTHREAD_EXIT_ERROR : std_logic_vector(0 to 15) := x"8016";
constant FUNCTION_HTHREAD_MUTEXATTR_INIT : std_logic_vector(0 to 15) := x"8020";
constant FUNCTION_HTHREAD_MUTEXATTR_DESTROY : std_logic_vector(0 to 15) := x"8021";
constant FUNCTION_HTHREAD_MUTEXATTR_SETNUM : std_logic_vector(0 to 15) := x"8022";
constant FUNCTION_HTHREAD_MUTEXATTR_GETNUM : std_logic_vector(0 to 15) := x"8023";
constant FUNCTION_HTHREAD_MUTEX_INIT : std_logic_vector(0 to 15) := x"8030";
constant FUNCTION_HTHREAD_MUTEX_DESTROY : std_logic_vector(0 to 15) := x"8031";
constant FUNCTION_HTHREAD_MUTEX_LOCK : std_logic_vector(0 to 15) := x"8032";
constant FUNCTION_HTHREAD_MUTEX_UNLOCK : std_logic_vector(0 to 15) := x"8033";
constant FUNCTION_HTHREAD_MUTEX_TRYLOCK : std_logic_vector(0 to 15) := x"8034";
constant FUNCTION_HTHREAD_CONDATTR_INIT : std_logic_vector(0 to 15) := x"8040";
constant FUNCTION_HTHREAD_CONDATTR_DESTROY : std_logic_vector(0 to 15) := x"8041";
constant FUNCTION_HTHREAD_CONDATTR_SETNUM : std_logic_vector(0 to 15) := x"8042";
constant FUNCTION_HTHREAD_CONDATTR_GETNUM : std_logic_vector(0 to 15) := x"8043";
constant FUNCTION_HTHREAD_COND_INIT : std_logic_vector(0 to 15) := x"8050";
constant FUNCTION_HTHREAD_COND_DESTROY : std_logic_vector(0 to 15) := x"8051";
constant FUNCTION_HTHREAD_COND_SIGNAL : std_logic_vector(0 to 15) := x"8052";
constant FUNCTION_HTHREAD_COND_BROADCAST : std_logic_vector(0 to 15) := x"8053";
constant FUNCTION_HTHREAD_COND_WAIT : std_logic_vector(0 to 15) := x"8054";
-- Ranged A000 to FFFF reserved for supported library calls
constant FUNCTION_MALLOC : std_logic_vector(0 to 15) := x"A000";
constant FUNCTION_CALLOC : std_logic_vector(0 to 15) := x"A001";
constant FUNCTION_FREE : std_logic_vector(0 to 15) := x"A002";
-- user_opcode Constants
constant OPCODE_NOOP : std_logic_vector(0 to 5) := "000000";
-- Memory sub-interface specific opcodes
constant OPCODE_LOAD : std_logic_vector(0 to 5) := "000001";
constant OPCODE_STORE : std_logic_vector(0 to 5) := "000010";
constant OPCODE_DECLARE : std_logic_vector(0 to 5) := "000011";
constant OPCODE_READ : std_logic_vector(0 to 5) := "000100";
constant OPCODE_WRITE : std_logic_vector(0 to 5) := "000101";
constant OPCODE_ADDRESS : std_logic_vector(0 to 5) := "000110";
-- Function sub-interface specific opcodes
constant OPCODE_PUSH : std_logic_vector(0 to 5) := "010000";
constant OPCODE_POP : std_logic_vector(0 to 5) := "010001";
constant OPCODE_CALL : std_logic_vector(0 to 5) := "010010";
constant OPCODE_RETURN : std_logic_vector(0 to 5) := "010011";
constant Z32 : std_logic_vector(0 to 31) := (others => '0');
signal current_state, next_state : state_machine := FUNCTION_RESET;
signal return_state, return_state_next: state_machine := FUNCTION_RESET;
signal toUser_address : std_logic_vector(0 to 31);
signal toUser_value : std_logic_vector(0 to 31);
signal toUser_function : std_logic_vector(0 to 15);
signal toUser_goWait : std_logic;
signal retVal, retVal_next : std_logic_vector(0 to 31);
signal arg, arg_next : std_logic_vector(0 to 31);
signal reg1, reg1_next : std_logic_vector(0 to 31);
signal reg2, reg2_next : std_logic_vector(0 to 31);
signal reg3, reg3_next : std_logic_vector(0 to 31);
signal reg4, reg4_next : std_logic_vector(0 to 31);
signal reg5, reg5_next : std_logic_vector(0 to 31);
signal reg6, reg6_next : std_logic_vector(0 to 31);
signal reg7, reg7_next : std_logic_vector(0 to 31);
signal reg8, reg8_next : std_logic_vector(0 to 31);
---------------------------------------------------------------------------
-- Begin architecture
---------------------------------------------------------------------------
begin -- architecture IMP
HWTUL_STATE_PROCESS : process (clock, intrfc2thrd_goWait) is
begin
if (clock'event and (clock = '1')) then
toUser_address <= intrfc2thrd_address;
toUser_value <= intrfc2thrd_value;
toUser_function <= intrfc2thrd_function;
toUser_goWait <= intrfc2thrd_goWait;
return_state <= return_state_next;
retVal <= retVal_next;
arg <= arg_next;
reg1 <= reg1_next;
reg2 <= reg2_next;
reg3 <= reg3_next;
reg4 <= reg4_next;
reg5 <= reg5_next;
reg6 <= reg6_next;
reg7 <= reg7_next;
reg8 <= reg8_next;
-- Find out if the HWTI is tell us what to do
if (intrfc2thrd_goWait = '1') then
case intrfc2thrd_function is
-- Typically the HWTI will tell us to control our own destiny
when U_FUNCTION_USER_SELECT =>
current_state <= next_state;
-- List all the functions the HWTI could tell us to run
when U_FUNCTION_RESET =>
current_state <= FUNCTION_RESET;
when U_FUNCTION_START =>
current_state <= FUNCTION_START;
when U_STATE_1 =>
current_state <= STATE_1;
when U_STATE_2 =>
current_state <= STATE_2;
when U_STATE_3 =>
current_state <= STATE_3;
when U_STATE_4 =>
current_state <= STATE_4;
when U_STATE_5 =>
current_state <= STATE_5;
when U_STATE_6 =>
current_state <= STATE_6;
when U_STATE_7 =>
current_state <= STATE_7;
when U_STATE_8 =>
current_state <= STATE_8;
when U_STATE_9 =>
current_state <= STATE_9;
when U_STATE_10 =>
current_state <= STATE_10;
when U_STATE_11 =>
current_state <= STATE_11;
when U_STATE_12 =>
current_state <= STATE_12;
when U_STATE_13 =>
current_state <= STATE_13;
when U_STATE_14 =>
current_state <= STATE_14;
when U_STATE_15 =>
current_state <= STATE_15;
when U_STATE_16 =>
current_state <= STATE_16;
when U_STATE_17 =>
current_state <= STATE_17;
when U_STATE_18 =>
current_state <= STATE_18;
when U_STATE_19 =>
current_state <= STATE_19;
when U_STATE_20 =>
current_state <= STATE_20;
-- If the HWTI tells us to do something we don't know, error
when OTHERS =>
current_state <= ERROR_STATE;
end case;
else
current_state <= WAIT_STATE;
end if;
end if;
end process HWTUL_STATE_PROCESS;
HWTUL_STATE_MACHINE : process (clock) is
begin
-- Default register assignments
thrd2intrfc_opcode <= OPCODE_NOOP; -- When issuing an OPCODE, must be a pulse
thrd2intrfc_address <= Z32;
thrd2intrfc_value <= Z32;
thrd2intrfc_function <= U_FUNCTION_USER_SELECT;
return_state_next <= return_state;
next_state <= current_state;
retVal_next <= retVal;
arg_next <= arg;
reg1_next <= reg1;
reg2_next <= reg2;
reg3_next <= reg3;
reg4_next <= reg4;
reg5_next <= reg5;
reg6_next <= reg6;
reg7_next <= reg7;
reg8_next <= reg8;
-----------------------------------------------------------------------
-- Testcase: create_2.c
-- reg6 = * function
-- reg7 = thread
-----------------------------------------------------------------------
-- The state machine
case current_state is
when FUNCTION_RESET =>
--Set default values
thrd2intrfc_opcode <= OPCODE_NOOP;
thrd2intrfc_address <= Z32;
thrd2intrfc_value <= Z32;
thrd2intrfc_function <= U_FUNCTION_START;
-- struct test_data * data = (struct test_data *) arg;
when FUNCTION_START =>
-- Pop the argument
thrd2intrfc_value <= Z32;
thrd2intrfc_opcode <= OPCODE_POP;
next_state <= WAIT_STATE;
return_state_next <= STATE_1;
when STATE_1 =>
arg_next <= intrfc2thrd_value;
-- Read the address of function
thrd2intrfc_opcode <= OPCODE_LOAD;
thrd2intrfc_address <= intrfc2thrd_value;
next_state <= WAIT_STATE;
return_state_next <= STATE_2;
when STATE_2 =>
reg6_next <= intrfc2thrd_value;
next_state <= STATE_3;
-- hthread_create( &data->thread, NULL, data->function, NULL );
when STATE_3 =>
-- push NULL
thrd2intrfc_opcode <= OPCODE_PUSH;
thrd2intrfc_value <= Z32;
next_state <= WAIT_STATE;
return_state_next <= STATE_4;
when STATE_4 =>
-- push data->function
thrd2intrfc_opcode <= OPCODE_PUSH;
thrd2intrfc_value <= reg6;
next_state <= WAIT_STATE;
return_state_next <= STATE_5;
when STATE_5 =>
-- push NULL
thrd2intrfc_opcode <= OPCODE_PUSH;
thrd2intrfc_value <= Z32;
next_state <= WAIT_STATE;
return_state_next <= STATE_6;
when STATE_6 =>
-- push &data->thread
thrd2intrfc_opcode <= OPCODE_PUSH;
thrd2intrfc_value <= arg + x"00000004";
next_state <= WAIT_STATE;
return_state_next <= STATE_7;
when STATE_7 =>
-- call hthread_create
thrd2intrfc_opcode <= OPCODE_CALL;
thrd2intrfc_function <= FUNCTION_HTHREAD_CREATE;
thrd2intrfc_value <= Z32(0 to 15) & U_STATE_8;
next_state <= WAIT_STATE;
-- retVal = hthread_join( data->thread, NULL );
when STATE_8 =>
-- Load the value of data->thread
thrd2intrfc_opcode <= OPCODE_LOAD;
thrd2intrfc_address <= arg + x"00000004";
next_state <= WAIT_STATE;
return_state_next <= STATE_9;
when STATE_9 =>
reg7_next <= intrfc2thrd_value;
-- push NULL
thrd2intrfc_opcode <= OPCODE_PUSH;
thrd2intrfc_value <= Z32;
next_state <= WAIT_STATE;
return_state_next <= STATE_10;
when STATE_10 =>
-- push data->thread
thrd2intrfc_opcode <= OPCODE_PUSH;
thrd2intrfc_value <= reg7;
next_state <= WAIT_STATE;
return_state_next <= STATE_11;
when STATE_11 =>
-- call hthread_join
thrd2intrfc_opcode <= OPCODE_CALL;
thrd2intrfc_function <= FUNCTION_HTHREAD_JOIN;
thrd2intrfc_value <= Z32(0 to 15) & U_STATE_12;
next_state <= WAIT_STATE;
when STATE_12 =>
retVal_next <= intrfc2thrd_value;
next_state <= FUNCTION_EXIT;
when FUNCTION_EXIT =>
--Same as hthread_exit( (void *) retVal );
thrd2intrfc_value <= retVal;
thrd2intrfc_opcode <= OPCODE_RETURN;
next_state <= WAIT_STATE;
when WAIT_STATE =>
next_state <= return_state;
when ERROR_STATE =>
next_state <= ERROR_STATE;
when others =>
next_state <= ERROR_STATE;
end case;
end process HWTUL_STATE_MACHINE;
end architecture IMP;
|
------------------------------------------------------------------------------
-- Title : Wishbone BPM SWAP flat interface
------------------------------------------------------------------------------
-- Author : Jose Alvim Berkenbrock
-- Company : CNPEM LNLS-DIG
-- Platform : FPGA-generic
-------------------------------------------------------------------------------
-- Description: Wishbone interface with BPM Swap core. In flat style.
-------------------------------------------------------------------------------
-- Copyright (c) 2013 CNPEM
-- Licensed under GNU Lesser General Public License (LGPL) v3.0
-------------------------------------------------------------------------------
-- Revisions :
-- Date Version Author Description
-- 2013-04-12 1.0 jose.berkenbrock Created
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
-- Main Wishbone Definitions
use work.wishbone_pkg.all;
-- BPM cores
use work.swap_pkg.all;
-- Register Bank
use work.bpm_swap_wbgen2_pkg.all;
entity wb_bpm_swap is
generic
(
g_interface_mode : t_wishbone_interface_mode := CLASSIC;
g_address_granularity : t_wishbone_address_granularity := WORD;
g_delay_vec_width : natural := 8;
g_swap_div_freq_vec_width : natural := 16;
g_ch_width : natural := 16
);
port
(
rst_n_i : in std_logic;
clk_sys_i : in std_logic;
fs_rst_n_i : in std_logic;
fs_clk_i : in std_logic;
-----------------------------
-- Wishbone signals
-----------------------------
wb_adr_i : in std_logic_vector(c_wishbone_address_width-1 downto 0) := (others => '0');
wb_dat_i : in std_logic_vector(c_wishbone_data_width-1 downto 0) := (others => '0');
wb_dat_o : out std_logic_vector(c_wishbone_data_width-1 downto 0);
wb_sel_i : in std_logic_vector(c_wishbone_data_width/8-1 downto 0) := (others => '0');
wb_we_i : in std_logic := '0';
wb_cyc_i : in std_logic := '0';
wb_stb_i : in std_logic := '0';
wb_ack_o : out std_logic;
wb_stall_o : out std_logic;
-----------------------------
-- External ports
-----------------------------
-- Input data from ADCs
cha_i : in std_logic_vector(g_ch_width-1 downto 0);
chb_i : in std_logic_vector(g_ch_width-1 downto 0);
chc_i : in std_logic_vector(g_ch_width-1 downto 0);
chd_i : in std_logic_vector(g_ch_width-1 downto 0);
ch_valid_i : in std_logic;
-- Output data to BPM DSP chain
cha_o : out std_logic_vector(g_ch_width-1 downto 0);
chb_o : out std_logic_vector(g_ch_width-1 downto 0);
chc_o : out std_logic_vector(g_ch_width-1 downto 0);
chd_o : out std_logic_vector(g_ch_width-1 downto 0);
ch_tag_o : out std_logic_vector(0 downto 0);
ch_valid_o : out std_logic;
-- RFFE swap clock (or switchwing clock)
rffe_swclk_o : out std_logic;
-- RFFE swap clock synchronization trigger
sync_trig_i : in std_logic
);
end wb_bpm_swap;
architecture rtl of wb_bpm_swap is
constant c_periph_addr_size : natural := 1+2;
signal fs_rst_n : std_logic;
-----------------------------
-- Wishbone Register Interface signals
-----------------------------
-- wb_bpm_swap reg structure
signal regs_in : t_bpm_swap_in_registers;
signal regs_out : t_bpm_swap_out_registers;
-----------------------------
-- Wishbone slave adapter signals/structures
-----------------------------
signal wb_slv_adp_out : t_wishbone_master_out;
signal wb_slv_adp_in : t_wishbone_master_in;
signal resized_addr : std_logic_vector(c_wishbone_address_width-1 downto 0);
signal deswap_delay : std_logic_vector(g_delay_vec_width-1 downto 0);
component wb_bpm_swap_regs
port (
rst_n_i : in std_logic;
clk_sys_i : in std_logic;
wb_adr_i : in std_logic_vector(0 downto 0);
wb_dat_i : in std_logic_vector(31 downto 0);
wb_dat_o : out std_logic_vector(31 downto 0);
wb_cyc_i : in std_logic;
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic;
wb_stall_o : out std_logic;
fs_clk_i : in std_logic;
regs_i : in t_bpm_swap_in_registers;
regs_o : out t_bpm_swap_out_registers
);
end component;
begin
-----------------------------
-- Slave adapter for Wishbone Register Interface
-----------------------------
cmp_slave_adapter : wb_slave_adapter
generic map (
g_master_use_struct => true,
g_master_mode => PIPELINED,
g_master_granularity => WORD,
g_slave_use_struct => false,
g_slave_mode => g_interface_mode,
g_slave_granularity => g_address_granularity
)
port map (
clk_sys_i => clk_sys_i,
rst_n_i => rst_n_i,
master_i => wb_slv_adp_in,
master_o => wb_slv_adp_out,
sl_adr_i => resized_addr,
sl_dat_i => wb_dat_i,
sl_sel_i => wb_sel_i,
sl_cyc_i => wb_cyc_i,
sl_stb_i => wb_stb_i,
sl_we_i => wb_we_i,
sl_dat_o => wb_dat_o,
sl_ack_o => wb_ack_o,
sl_rty_o => open,
sl_err_o => open,
sl_stall_o => wb_stall_o
);
-- See wb_bpm_swap_port.vhd for register bank addresses.
resized_addr(c_periph_addr_size-1 downto 0) <= wb_adr_i(c_periph_addr_size-1 downto 0); --cbar_master_out(0).adr(c_periph_addr_size-1 downto 0);
resized_addr(c_wishbone_address_width-1 downto c_periph_addr_size) <= (others => '0');
-- Register Bank / Wishbone Interface
cmp_wb_bpm_swap_regs : wb_bpm_swap_regs
port map (
rst_n_i => rst_n_i,
clk_sys_i => clk_sys_i,
wb_adr_i => wb_slv_adp_out.adr(0 downto 0),
wb_dat_i => wb_slv_adp_out.dat,
wb_dat_o => wb_slv_adp_in.dat,
wb_cyc_i => wb_slv_adp_out.cyc,
wb_sel_i => wb_slv_adp_out.sel,
wb_stb_i => wb_slv_adp_out.stb,
wb_we_i => wb_slv_adp_out.we,
wb_ack_o => wb_slv_adp_in.ack,
wb_stall_o => wb_slv_adp_in.stall,
fs_clk_i => fs_clk_i,
regs_i => regs_in,
regs_o => regs_out
);
-- Registers assignment
regs_in.ctrl_reserved_i <= (others => '0');
regs_in.dly_reserved_i <= (others => '0');
-- Unused wishbone signals
wb_slv_adp_in.err <= '0';
wb_slv_adp_in.rty <= '0';
cmp_bpm_swap : bpm_swap
generic map (
g_delay_vec_width => g_delay_vec_width,
g_swap_div_freq_vec_width => g_swap_div_freq_vec_width,
g_ch_width => g_ch_width
)
port map (
clk_i => fs_clk_i,
rst_n_i => fs_rst_n_i,
cha_i => cha_i,
chb_i => chb_i,
chc_i => chc_i,
chd_i => chd_i,
ch_valid_i => ch_valid_i,
cha_o => cha_o,
chb_o => chb_o,
chc_o => chc_o,
chd_o => chd_o,
ch_tag_o => ch_tag_o,
ch_valid_o => ch_valid_o,
rffe_swclk_o => rffe_swclk_o,
sync_trig_i => sync_trig_i,
swap_mode_i => regs_out.ctrl_mode_o,
swap_div_f_i => regs_out.ctrl_swap_div_f_o,
deswap_delay_i => deswap_delay
);
deswap_delay <= regs_out.dly_deswap_o(g_delay_vec_width-1 downto 0);
end rtl;
|
-- ----------------------------------------------------------------------
-- DspUnit : Advanced So(P)C Sequential Signal Processor
-- Copyright (C) 2007-2010 by Adrien LELONG (www.lelongdunet.com)
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the
-- Free Software Foundation, Inc.,
-- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-- ----------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.dspunit_pac.all;
use work.dspalu_pac.all;
-------------------------------------------------------------------------------
entity conv_circ is
port (
--@inputs
clk : in std_logic;
op_en : in std_logic;
alu_result1 : in std_logic_vector((sig_width - 1) downto 0);
alu_result_acc1 : in std_logic_vector((acc_width - 1) downto 0);
alu_result2 : in std_logic_vector((sig_width - 1) downto 0);
alu_result_acc2 : in std_logic_vector((acc_width - 1) downto 0);
gcount : in unsigned(15 downto 0);
data_in_m0 : in std_logic_vector((sig_width - 1) downto 0);
data_in_m1 : in std_logic_vector((sig_width - 1) downto 0);
length_reg : in std_logic_vector((cmdreg_data_width -1) downto 0);
--@outputs;
dsp_bus : out t_dsp_bus;
test : out std_logic_vector((sig_width - 1) downto 0)
);
end conv_circ;
--=----------------------------------------------------------------------------
architecture archi_conv_circ of conv_circ is
-----------------------------------------------------------------------------
-- @constants definition
-----------------------------------------------------------------------------
--=--------------------------------------------------------------------------
--
-- @component declarations
--
-----------------------------------------------------------------------------
--=--------------------------------------------------------------------------
-- @signals definition
-----------------------------------------------------------------------------
signal s_dsp_bus : t_dsp_bus;
type t_conv_circ_state is (st_init, st_integral, st_store, st_waitpipe, st_startpipe);
signal s_state : t_conv_circ_state;
signal s_length : unsigned((cmdreg_width - 1) downto 0);
signal s_conv_res : std_logic_vector((sig_width - 1) downto 0);
begin -- archs_conv_circ
-----------------------------------------------------------------------------
--
-- @instantiations
--
-----------------------------------------------------------------------------
--=---------------------------------------------------------------------------
p_conv_circ : process (clk)
begin -- process p_conv_circ
if rising_edge(clk) then -- rising clock edge
if op_en = '0' then
s_state <= st_init;
--s_dsp_bus <= c_dsp_bus_init;
s_dsp_bus.op_done <= '0';
-- memory 0
-- s_dsp_bus.data_out_m0 <= (others => '0');
s_dsp_bus.addr_r_m0 <= (others => '0');
s_dsp_bus.addr_w_m0 <= (others => '0');
s_dsp_bus.wr_en_m0 <= '0';
--s_dsp_bus.c_en_m0 <= '0';
-- memory 1
-- s_dsp_bus.data_out_m1 <= (others => '0');
s_dsp_bus.addr_m1 <= (others => '0');
s_dsp_bus.wr_en_m1 <= '0';
--s_dsp_bus.c_en_m1 <= '0';
-- memory 2
-- s_dsp_bus.data_out_m2 <= (others => '0');
s_dsp_bus.addr_m2 <= (others => '0');
s_dsp_bus.wr_en_m2 <= '0';
--s_dsp_bus.c_en_m2 <= '0';
-- alu
--s_dsp_bus.mul_in_a1 <= (others <= '0');
--s_dsp_bus.mul_in_b1 <= (others <= '0');
--s_dsp_bus.mul_in_a2 <= (others <= '0');
--s_dsp_bus.mul_in_b2 <= (others <= '0');
s_dsp_bus.acc_mode1 <= acc_store;
s_dsp_bus.acc_mode2 <= acc_store;
s_dsp_bus.alu_select <= alu_mul;
-- global counter
--s_dsp_bus.gcounter_reset <= '0';
-------------------------------------------------------------------------------
-- operation management
-------------------------------------------------------------------------------
else
case s_state is
when st_init =>
s_dsp_bus.addr_r_m0 <= (others => '0');
s_dsp_bus.addr_m1 <= s_length;
s_dsp_bus.addr_m2 <= (others => '0');
s_dsp_bus.wr_en_m2 <= '0';
if s_dsp_bus.op_done = '0' then
s_state <= st_startpipe;
end if;
when st_startpipe =>
if s_dsp_bus.addr_r_m0 = 1 then
s_state <= st_integral;
-- s_dsp_bus.acc_mode1 <= acc_add;
end if;
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
-- accumulator init
s_dsp_bus.acc_mode1 <= acc_store;
when st_waitpipe =>
if s_dsp_bus.addr_r_m0 = 1 then
s_state <= st_store;
s_dsp_bus.acc_mode1 <= acc_store;
-- s_dsp_bus.wr_en_m2 <= '1';
end if;
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
when st_store =>
-- save accumulator result in memory
s_dsp_bus.wr_en_m2 <= '1';
if(s_dsp_bus.addr_m2 = s_length) then
s_state <= st_init;
s_dsp_bus.op_done <= '1';
else
s_dsp_bus.acc_mode1 <= acc_add;
s_dsp_bus.addr_m2 <= s_dsp_bus.addr_m2 + 1;
s_state <= st_integral;
end if;
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
when st_integral =>
s_dsp_bus.wr_en_m2 <= '0';
-- perform mac operation
s_dsp_bus.acc_mode1 <= acc_add;
-- end of integration
if s_dsp_bus.addr_r_m0 = s_length then
s_state <= st_waitpipe;
s_dsp_bus.addr_r_m0 <= (others => '0');
else
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
end if;
when others => null;
end case;
end if;
end if;
end process p_conv_circ;
--=---------------------------------------------------------------------------
--
-- @concurrent signal assignments
--
-----------------------------------------------------------------------------
dsp_bus <= s_dsp_bus;
-- multiplication of signals is made before accumulation
s_dsp_bus.mul_in_a1 <= data_in_m0;
s_dsp_bus.mul_in_b1 <= data_in_m1;
s_conv_res <= std_logic_vector(alu_result_acc1((sig_width - 1) downto 0));
s_dsp_bus.data_out_m2 <= s_conv_res;
s_dsp_bus.data_out_m0 <= s_conv_res;
s_dsp_bus.data_out_m1 <= s_conv_res;
s_dsp_bus.c_en_m0 <= '1';
s_dsp_bus.c_en_m1 <= '1';
s_dsp_bus.c_en_m2 <= '1';
s_dsp_bus.gcounter_reset <= '1';
s_length <= unsigned(length_reg);
test <= s_conv_res;
end archi_conv_circ;
-------------------------------------------------------------------------------
|
-- ----------------------------------------------------------------------
-- DspUnit : Advanced So(P)C Sequential Signal Processor
-- Copyright (C) 2007-2010 by Adrien LELONG (www.lelongdunet.com)
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the
-- Free Software Foundation, Inc.,
-- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-- ----------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.dspunit_pac.all;
use work.dspalu_pac.all;
-------------------------------------------------------------------------------
entity conv_circ is
port (
--@inputs
clk : in std_logic;
op_en : in std_logic;
alu_result1 : in std_logic_vector((sig_width - 1) downto 0);
alu_result_acc1 : in std_logic_vector((acc_width - 1) downto 0);
alu_result2 : in std_logic_vector((sig_width - 1) downto 0);
alu_result_acc2 : in std_logic_vector((acc_width - 1) downto 0);
gcount : in unsigned(15 downto 0);
data_in_m0 : in std_logic_vector((sig_width - 1) downto 0);
data_in_m1 : in std_logic_vector((sig_width - 1) downto 0);
length_reg : in std_logic_vector((cmdreg_data_width -1) downto 0);
--@outputs;
dsp_bus : out t_dsp_bus;
test : out std_logic_vector((sig_width - 1) downto 0)
);
end conv_circ;
--=----------------------------------------------------------------------------
architecture archi_conv_circ of conv_circ is
-----------------------------------------------------------------------------
-- @constants definition
-----------------------------------------------------------------------------
--=--------------------------------------------------------------------------
--
-- @component declarations
--
-----------------------------------------------------------------------------
--=--------------------------------------------------------------------------
-- @signals definition
-----------------------------------------------------------------------------
signal s_dsp_bus : t_dsp_bus;
type t_conv_circ_state is (st_init, st_integral, st_store, st_waitpipe, st_startpipe);
signal s_state : t_conv_circ_state;
signal s_length : unsigned((cmdreg_width - 1) downto 0);
signal s_conv_res : std_logic_vector((sig_width - 1) downto 0);
begin -- archs_conv_circ
-----------------------------------------------------------------------------
--
-- @instantiations
--
-----------------------------------------------------------------------------
--=---------------------------------------------------------------------------
p_conv_circ : process (clk)
begin -- process p_conv_circ
if rising_edge(clk) then -- rising clock edge
if op_en = '0' then
s_state <= st_init;
--s_dsp_bus <= c_dsp_bus_init;
s_dsp_bus.op_done <= '0';
-- memory 0
-- s_dsp_bus.data_out_m0 <= (others => '0');
s_dsp_bus.addr_r_m0 <= (others => '0');
s_dsp_bus.addr_w_m0 <= (others => '0');
s_dsp_bus.wr_en_m0 <= '0';
--s_dsp_bus.c_en_m0 <= '0';
-- memory 1
-- s_dsp_bus.data_out_m1 <= (others => '0');
s_dsp_bus.addr_m1 <= (others => '0');
s_dsp_bus.wr_en_m1 <= '0';
--s_dsp_bus.c_en_m1 <= '0';
-- memory 2
-- s_dsp_bus.data_out_m2 <= (others => '0');
s_dsp_bus.addr_m2 <= (others => '0');
s_dsp_bus.wr_en_m2 <= '0';
--s_dsp_bus.c_en_m2 <= '0';
-- alu
--s_dsp_bus.mul_in_a1 <= (others <= '0');
--s_dsp_bus.mul_in_b1 <= (others <= '0');
--s_dsp_bus.mul_in_a2 <= (others <= '0');
--s_dsp_bus.mul_in_b2 <= (others <= '0');
s_dsp_bus.acc_mode1 <= acc_store;
s_dsp_bus.acc_mode2 <= acc_store;
s_dsp_bus.alu_select <= alu_mul;
-- global counter
--s_dsp_bus.gcounter_reset <= '0';
-------------------------------------------------------------------------------
-- operation management
-------------------------------------------------------------------------------
else
case s_state is
when st_init =>
s_dsp_bus.addr_r_m0 <= (others => '0');
s_dsp_bus.addr_m1 <= s_length;
s_dsp_bus.addr_m2 <= (others => '0');
s_dsp_bus.wr_en_m2 <= '0';
if s_dsp_bus.op_done = '0' then
s_state <= st_startpipe;
end if;
when st_startpipe =>
if s_dsp_bus.addr_r_m0 = 1 then
s_state <= st_integral;
-- s_dsp_bus.acc_mode1 <= acc_add;
end if;
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
-- accumulator init
s_dsp_bus.acc_mode1 <= acc_store;
when st_waitpipe =>
if s_dsp_bus.addr_r_m0 = 1 then
s_state <= st_store;
s_dsp_bus.acc_mode1 <= acc_store;
-- s_dsp_bus.wr_en_m2 <= '1';
end if;
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
when st_store =>
-- save accumulator result in memory
s_dsp_bus.wr_en_m2 <= '1';
if(s_dsp_bus.addr_m2 = s_length) then
s_state <= st_init;
s_dsp_bus.op_done <= '1';
else
s_dsp_bus.acc_mode1 <= acc_add;
s_dsp_bus.addr_m2 <= s_dsp_bus.addr_m2 + 1;
s_state <= st_integral;
end if;
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
when st_integral =>
s_dsp_bus.wr_en_m2 <= '0';
-- perform mac operation
s_dsp_bus.acc_mode1 <= acc_add;
-- end of integration
if s_dsp_bus.addr_r_m0 = s_length then
s_state <= st_waitpipe;
s_dsp_bus.addr_r_m0 <= (others => '0');
else
-- index increment
s_dsp_bus.addr_r_m0 <= s_dsp_bus.addr_r_m0 + 1;
s_dsp_bus.addr_m1 <= (s_dsp_bus.addr_m1 - 1) and s_length;
end if;
when others => null;
end case;
end if;
end if;
end process p_conv_circ;
--=---------------------------------------------------------------------------
--
-- @concurrent signal assignments
--
-----------------------------------------------------------------------------
dsp_bus <= s_dsp_bus;
-- multiplication of signals is made before accumulation
s_dsp_bus.mul_in_a1 <= data_in_m0;
s_dsp_bus.mul_in_b1 <= data_in_m1;
s_conv_res <= std_logic_vector(alu_result_acc1((sig_width - 1) downto 0));
s_dsp_bus.data_out_m2 <= s_conv_res;
s_dsp_bus.data_out_m0 <= s_conv_res;
s_dsp_bus.data_out_m1 <= s_conv_res;
s_dsp_bus.c_en_m0 <= '1';
s_dsp_bus.c_en_m1 <= '1';
s_dsp_bus.c_en_m2 <= '1';
s_dsp_bus.gcounter_reset <= '1';
s_length <= unsigned(length_reg);
test <= s_conv_res;
end archi_conv_circ;
-------------------------------------------------------------------------------
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
---------------------------------------------------
-- School: University of Massachusetts Dartmouth
-- Department: Computer and Electrical Engineering
-- Engineer: Daniel Noyes
--
-- Create Date: SPRING 2016
-- Module Name: Button Controller
-- Project Name: Button Controller
-- Target Devices: Spartan-3E
-- Tool versions: Xilinx ISE 14.7
-- Description: Button Controller
-- Four input debouncer
---------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use work.all;
entity buttoncontrol is
Port ( CLK : in STD_LOGIC;
INPUT : in STD_LOGIC_VECTOR (3 downto 0);
OUTPUT : out STD_LOGIC_VECTOR (3 downto 0));
end buttoncontrol;
architecture Structural of buttoncontrol is
signal EN : STD_LOGIC := '1';
begin
BTN_0: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(0),
OUTPUT => OUTPUT(0));
BTN_1: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(1),
OUTPUT => OUTPUT(1));
BTN_2: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(2),
OUTPUT => OUTPUT(2));
BTN_3: entity work.debounce
port map( CLK => CLK,
EN => EN,
INPUT => INPUT(3),
OUTPUT => OUTPUT(3));
end Structural;
|
architecture rtl of fifo is
signal sig8 : record_type_3(
element1
(7 downto 0),
element2
(4 downto 0)
(7 downto 0)
(
elementA
(7 downto 0)
,
elementB
(3 downto 0)
),
element3
(3 downto 0)(elementC
(4 downto 1), elementD
(1 downto 0)),
element5(
elementE
(3 downto 0)
(6 downto 0)
,
elementF
(7 downto 0)
),
element6
(4 downto 0),
element7
(7 downto 0));
signal sig9 : t_data_struct(data
(7 downto 0));
signal sig9 : t_data_struct(
data
(7 downto 0)
);
begin
end architecture rtl;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity psl_test_cover is
end entity psl_test_cover;
architecture test of psl_test_cover is
signal s_rst_n : std_logic := '0';
signal s_clk : std_logic := '0';
signal s_write : std_logic;
signal s_read : std_logic;
begin
s_rst_n <= '1' after 100 ns;
s_clk <= not s_clk after 10 ns;
TestP : process is
begin
report "RUNNING PSL_TEST_COVER test case";
report "================================";
s_write <= '0';
s_read <= '0';
wait until s_rst_n = '1' and rising_edge(s_clk);
s_write <= '1'; -- cover should hit
wait until rising_edge(s_clk);
s_read <= '1'; -- assertion should hit
wait until rising_edge(s_clk);
s_write <= '0';
s_read <= '0';
wait;
end process TestP;
-- -psl statements
-- psl default clock is rising_edge(s_clk);
-- cover directive seems not supported (ignored by GHDL)
-- psl cover { s_write ; not(s_read)};
end architecture test;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity psl_test_cover is
end entity psl_test_cover;
architecture test of psl_test_cover is
signal s_rst_n : std_logic := '0';
signal s_clk : std_logic := '0';
signal s_write : std_logic;
signal s_read : std_logic;
begin
s_rst_n <= '1' after 100 ns;
s_clk <= not s_clk after 10 ns;
TestP : process is
begin
report "RUNNING PSL_TEST_COVER test case";
report "================================";
s_write <= '0';
s_read <= '0';
wait until s_rst_n = '1' and rising_edge(s_clk);
s_write <= '1'; -- cover should hit
wait until rising_edge(s_clk);
s_read <= '1'; -- assertion should hit
wait until rising_edge(s_clk);
s_write <= '0';
s_read <= '0';
wait;
end process TestP;
-- -psl statements
-- psl default clock is rising_edge(s_clk);
-- cover directive seems not supported (ignored by GHDL)
-- psl cover { s_write ; not(s_read)};
end architecture test;
|
-----------------------------------------------------------------------------
-- LEON3 Demonstration design
-- Copyright (C) 2004 Jiri Gaisler, Gaisler Research
------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2003 - 2008, Gaisler Research
-- Copyright (C) 2008 - 2014, Aeroflex Gaisler
-- Copyright (C) 2015, Cobham Gaisler
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
library grlib, techmap;
use grlib.amba.all;
use grlib.stdlib.all;
use grlib.devices.all;
use techmap.gencomp.all;
use techmap.allclkgen.all;
library gaisler;
use gaisler.memctrl.all;
use gaisler.ddrpkg.all;
use gaisler.leon3.all;
use gaisler.uart.all;
use gaisler.misc.all;
use gaisler.i2c.all;
use gaisler.net.all;
use gaisler.jtag.all;
library esa;
use esa.memoryctrl.all;
use work.config.all;
use work.ml50x.all;
-- pragma translate_off
library unisim;
use unisim.ODDR;
-- pragma translate_on
entity leon3mp is
generic (
fabtech : integer := CFG_FABTECH;
memtech : integer := CFG_MEMTECH;
padtech : integer := CFG_PADTECH;
ncpu : integer := CFG_NCPU;
disas : integer := CFG_DISAS; -- Enable disassembly to console
dbguart : integer := CFG_DUART; -- Print UART on console
pclow : integer := CFG_PCLOW
);
port (
sys_rst_in : in std_ulogic;
clk_100 : in std_ulogic; -- 100 MHz main clock
clk_200_p : in std_ulogic; -- 200 MHz
clk_200_n : in std_ulogic; -- 200 MHz
sysace_clk_in : in std_ulogic; -- System ACE clock
sram_flash_addr : out std_logic_vector(23 downto 0);
sram_flash_data : inout std_logic_vector(31 downto 0);
sram_cen : out std_logic;
sram_bw : out std_logic_vector (0 to 3);
sram_oen : out std_ulogic;
sram_flash_we_n : out std_ulogic;
flash_ce : out std_logic;
flash_oen : out std_logic;
flash_adv_n : out std_logic;
sram_clk : out std_ulogic;
sram_clk_fb : in std_ulogic;
sram_mode : out std_ulogic;
sram_adv_ld_n : out std_ulogic;
--pragma translate_off
iosn : out std_ulogic;
--pragma translate_on
ddr2_ck : out std_logic_vector(1 downto 0);
ddr2_ck_n : out std_logic_vector(1 downto 0);
ddr2_cke : out std_logic_vector(1 downto 0);
ddr2_cs_n : out std_logic_vector(1 downto 0);
ddr2_odt : out std_logic_vector(1 downto 0);
ddr2_we_n : out std_ulogic; -- ddr write enable
ddr2_ras_n : out std_ulogic; -- ddr ras
ddr2_cas_n : out std_ulogic; -- ddr cas
ddr2_dm : out std_logic_vector (7 downto 0); -- ddr dm
ddr2_dqs : inout std_logic_vector (7 downto 0); -- ddr dqs
ddr2_dqs_n : inout std_logic_vector (7 downto 0); -- ddr dqs
ddr2_a : out std_logic_vector (13 downto 0); -- ddr address
ddr2_ba : out std_logic_vector (1+CFG_DDR2SP downto 0); -- ddr bank address
ddr2_dq : inout std_logic_vector (63 downto 0); -- ddr data
txd1 : out std_ulogic; -- UART1 tx data
rxd1 : in std_ulogic; -- UART1 rx data
-- txd2 : out std_ulogic; -- UART2 tx data
-- rxd2 : in std_ulogic; -- UART2 rx data
gpio : inout std_logic_vector(13 downto 0); -- I/O port
led : out std_logic_vector(12 downto 0);
bus_error : out std_logic_vector(1 downto 0);
phy_gtx_clk : out std_logic;
phy_mii_data : inout std_logic; -- ethernet PHY interface
phy_tx_clk : in std_ulogic;
phy_rx_clk : in std_ulogic;
phy_rx_data : in std_logic_vector(7 downto 0);
phy_dv : in std_ulogic;
phy_rx_er : in std_ulogic;
phy_col : in std_ulogic;
phy_crs : in std_ulogic;
phy_tx_data : out std_logic_vector(7 downto 0);
phy_tx_en : out std_ulogic;
phy_tx_er : out std_ulogic;
phy_mii_clk : out std_ulogic;
phy_rst_n : out std_ulogic;
phy_int : in std_ulogic;
ps2_keyb_clk : inout std_logic;
ps2_keyb_data : inout std_logic;
ps2_mouse_clk : inout std_logic;
ps2_mouse_data : inout std_logic;
usb_csn : out std_logic;
usb_rstn : out std_logic;
iic_scl : inout std_ulogic;
iic_sda : inout std_ulogic;
dvi_iic_scl : inout std_logic;
dvi_iic_sda : inout std_logic;
tft_lcd_data : out std_logic_vector(11 downto 0);
tft_lcd_clk_p : out std_ulogic;
tft_lcd_clk_n : out std_ulogic;
tft_lcd_hsync : out std_ulogic;
tft_lcd_vsync : out std_ulogic;
tft_lcd_de : out std_ulogic;
tft_lcd_reset_b : out std_ulogic;
sace_usb_a : out std_logic_vector(6 downto 0);
sace_mpce : out std_ulogic;
sace_usb_d : inout std_logic_vector(15 downto 0);
sace_usb_oen : out std_ulogic;
sace_usb_wen : out std_ulogic;
sysace_mpirq : in std_ulogic
);
end;
architecture rtl of leon3mp is
component ODDR
generic
( DDR_CLK_EDGE : string := "OPPOSITE_EDGE";
-- INIT : bit := '0';
SRTYPE : string := "SYNC");
port
(
Q : out std_ulogic;
C : in std_ulogic;
CE : in std_ulogic;
D1 : in std_ulogic;
D2 : in std_ulogic;
R : in std_ulogic;
S : in std_ulogic
);
end component;
component svga2ch7301c
generic (
tech : integer := 0;
idf : integer := 0;
dynamic : integer := 0
);
port (
clk : in std_ulogic;
rstn : in std_ulogic;
clksel : in std_logic_vector(1 downto 0);
vgao : in apbvga_out_type;
vgaclk_fb : in std_ulogic;
clk25_fb : in std_ulogic;
clk40_fb : in std_ulogic;
clk65_fb : in std_ulogic;
vgaclk : out std_ulogic;
clk25 : out std_ulogic;
clk40 : out std_ulogic;
clk65 : out std_ulogic;
dclk_p : out std_ulogic;
dclk_n : out std_ulogic;
locked : out std_ulogic;
data : out std_logic_vector(11 downto 0);
hsync : out std_ulogic;
vsync : out std_ulogic;
de : out std_ulogic
);
end component;
constant blength : integer := 12;
constant fifodepth : integer := 8;
constant maxahbm : integer := NCPU+CFG_AHB_UART
+CFG_GRETH+CFG_AHB_JTAG+CFG_SVGA_ENABLE;
signal ddr_clk_fb : std_logic;
signal vcc, gnd : std_logic_vector(4 downto 0);
signal memi : memory_in_type;
signal memo : memory_out_type;
signal wpo : wprot_out_type;
signal sdi : sdctrl_in_type;
signal sdo : sdctrl_out_type;
signal sdo2 : sdctrl_out_type;
signal apbi : apb_slv_in_type;
signal apbo : apb_slv_out_vector := (others => apb_none);
signal ahbsi : ahb_slv_in_type;
signal ahbso : ahb_slv_out_vector := (others => ahbs_none);
signal ahbmi : ahb_mst_in_type;
signal ahbmo : ahb_mst_out_vector := (others => ahbm_none);
signal clkm, rstn, rstraw, srclkl : std_ulogic;
signal clk_200 : std_ulogic;
signal clk25, clk40, clk65 : std_ulogic;
signal cgi, cgi2 : clkgen_in_type;
signal cgo, cgo2 : clkgen_out_type;
signal u1i, u2i, dui : uart_in_type;
signal u1o, u2o, duo : uart_out_type;
signal irqi : irq_in_vector(0 to NCPU-1);
signal irqo : irq_out_vector(0 to NCPU-1);
signal dbgi : l3_debug_in_vector(0 to NCPU-1);
signal dbgo : l3_debug_out_vector(0 to NCPU-1);
signal dsui : dsu_in_type;
signal dsuo : dsu_out_type;
signal ethi, ethi1, ethi2 : eth_in_type;
signal etho, etho1, etho2 : eth_out_type;
signal gpti : gptimer_in_type;
signal gpto : gptimer_out_type;
signal gpioi : gpio_in_type;
signal gpioo : gpio_out_type;
signal clklock, lock, lclk, clkml, rst, ndsuact : std_ulogic;
signal tck, tckn, tms, tdi, tdo : std_ulogic;
signal ddrclk, ddrrst : std_ulogic;
signal egtx_clk_fb : std_ulogic;
signal egtx_clk, legtx_clk, l2egtx_clk : std_ulogic;
signal kbdi : ps2_in_type;
signal kbdo : ps2_out_type;
signal moui : ps2_in_type;
signal mouo : ps2_out_type;
signal vgao : apbvga_out_type;
signal lcd_datal : std_logic_vector(11 downto 0);
signal lcd_hsyncl, lcd_vsyncl, lcd_del, lcd_reset_bl : std_ulogic;
signal clk_sel : std_logic_vector(1 downto 0);
signal vgalock : std_ulogic;
signal clkvga, clkvga_p, clkvga_n : std_ulogic;
signal i2ci, dvi_i2ci : i2c_in_type;
signal i2co, dvi_i2co : i2c_out_type;
constant BOARD_FREQ_200 : integer := 200000; -- input frequency in KHz
constant BOARD_FREQ : integer := 100000; -- input frequency in KHz
constant CPU_FREQ : integer := BOARD_FREQ * CFG_CLKMUL / CFG_CLKDIV; -- cpu frequency in KHz
constant I2C_FILTER : integer := (CPU_FREQ*5+50000)/100000+1;
constant IOAEN : integer := CFG_DDR2SP + CFG_GRACECTRL;
signal stati : ahbstat_in_type;
signal ssrclkfb : std_ulogic;
-- Used for connecting input/output signals to the DDR3 controller
signal migi : mig_app_in_type;
signal migo : mig_app_out_type;
signal phy_init_done : std_ulogic;
signal clk0_tb, rst0_tb, rst0_tbn : std_ulogic;
signal sysmoni : grsysmon_in_type;
signal sysmono : grsysmon_out_type;
signal clkace : std_ulogic;
signal acei : gracectrl_in_type;
signal aceo : gracectrl_out_type;
attribute syn_keep : boolean;
attribute syn_preserve : boolean;
attribute syn_keep of clkml : signal is true;
attribute syn_preserve of clkml : signal is true;
attribute syn_keep of clkm : signal is true;
attribute syn_preserve of clkm : signal is true;
attribute syn_keep of egtx_clk : signal is true;
attribute syn_preserve of egtx_clk : signal is true;
attribute syn_keep of clkvga : signal is true;
attribute syn_preserve of clkvga : signal is true;
attribute syn_keep of clk25 : signal is true;
attribute syn_preserve of clk25 : signal is true;
attribute syn_keep of clk40 : signal is true;
attribute syn_preserve of clk40 : signal is true;
attribute syn_keep of clk65 : signal is true;
attribute syn_preserve of clk65 : signal is true;
attribute syn_keep of clk_200 : signal is true;
attribute syn_preserve of clk_200 : signal is true;
attribute syn_preserve of phy_init_done : signal is true;
attribute keep : boolean;
attribute keep of lock : signal is true;
attribute keep of clkml : signal is true;
attribute keep of clkm : signal is true;
attribute keep of egtx_clk : signal is true;
attribute keep of clkvga : signal is true;
attribute keep of clk25 : signal is true;
attribute keep of clk40 : signal is true;
attribute keep of clk65 : signal is true;
attribute keep of clk_200 : signal is true;
attribute keep of phy_init_done : signal is true;
attribute syn_noprune : boolean;
attribute syn_noprune of sysace_clk_in_pad : label is true;
begin
usb_csn <= '1';
usb_rstn <= rstn;
rst0_tbn <= not rst0_tb;
----------------------------------------------------------------------
--- Reset and Clock generation -------------------------------------
----------------------------------------------------------------------
vcc <= (others => '1'); gnd <= (others => '0');
cgi.pllctrl <= "00"; cgi.pllrst <= rstraw; cgi.pllref <= ssrclkfb;
ssrref_pad : clkpad generic map (tech => padtech)
port map (sram_clk_fb, ssrclkfb);
clk_pad : clkpad generic map (tech => padtech, arch => 2)
port map (clk_100, lclk);
clk200_pad : clkpad_ds generic map (tech => padtech, level => lvds, voltage => x25v)
port map (clk_200_p, clk_200_n, clk_200);
srclk_pad : outpad generic map (tech => padtech, slew => 1, strength => 24)
port map (sram_clk, srclkl);
sysace_clk_in_pad : clkpad generic map (tech => padtech)
port map (sysace_clk_in, clkace);
clkgen0 : clkgen -- system clock generator
generic map (CFG_FABTECH, CFG_CLKMUL, CFG_CLKDIV, 1, 0, 0, 0, 0, BOARD_FREQ, 0)
port map (lclk, gnd(0), clkm, open, open, srclkl, open, cgi, cgo);
gclk : if CFG_GRETH1G /= 0 generate
clkgen1 : clkgen -- Ethernet 1G PHY clock generator
generic map (CFG_FABTECH, 5, 4, 0, 0, 0, 0, 0, BOARD_FREQ, 0)
port map (lclk, gnd(0), egtx_clk, open, open, open, open, cgi2, cgo2);
cgi2.pllctrl <= "00"; cgi2.pllrst <= rstraw; --cgi2.pllref <= egtx_clk_fb;
x0 : ODDR port map ( Q => phy_gtx_clk, C => egtx_clk, CE => vcc(0),
-- D1 => gnd(0), D2 => vcc(0), R => gnd(0), S => gnd(0));
D1 => vcc(0), D2 => gnd(0), R => gnd(0), S => gnd(0));
end generate;
nogclk : if CFG_GRETH1G = 0 generate
cgo2.clklock <= '1'; phy_gtx_clk <= '0';
end generate;
resetn_pad : inpad generic map (tech => padtech) port map (sys_rst_in, rst);
rst0 : rstgen -- reset generator
port map (rst, clkm, clklock, rstn, rstraw);
clklock <= lock and cgo.clklock and cgo2.clklock and vgalock;
----------------------------------------------------------------------
--- AHB CONTROLLER --------------------------------------------------
----------------------------------------------------------------------
ahb0 : ahbctrl -- AHB arbiter/multiplexer
generic map (defmast => CFG_DEFMST, split => CFG_SPLIT,
rrobin => CFG_RROBIN, ioaddr => CFG_AHBIO, devid => XILINX_ML501,
ioen => IOAEN, nahbm => maxahbm, nahbs => 8)
port map (rstn, clkm, ahbmi, ahbmo, ahbsi, ahbso);
----------------------------------------------------------------------
--- LEON3 processor and DSU -----------------------------------------
----------------------------------------------------------------------
l3 : if CFG_LEON3 = 1 generate
cpu : for i in 0 to NCPU-1 generate
u0 : leon3s -- LEON3 processor
generic map (i, fabtech, memtech, CFG_NWIN, CFG_DSU, CFG_FPU, CFG_V8,
0, CFG_MAC, pclow, CFG_NOTAG, CFG_NWP, CFG_ICEN, CFG_IREPL, CFG_ISETS, CFG_ILINE,
CFG_ISETSZ, CFG_ILOCK, CFG_DCEN, CFG_DREPL, CFG_DSETS, CFG_DLINE, CFG_DSETSZ,
CFG_DLOCK, CFG_DSNOOP, CFG_ILRAMEN, CFG_ILRAMSZ, CFG_ILRAMADDR, CFG_DLRAMEN,
CFG_DLRAMSZ, CFG_DLRAMADDR, CFG_MMUEN, CFG_ITLBNUM, CFG_DTLBNUM, CFG_TLB_TYPE, CFG_TLB_REP,
CFG_LDDEL, disas, CFG_ITBSZ, CFG_PWD, CFG_SVT, CFG_RSTADDR, NCPU-1,
CFG_DFIXED, CFG_SCAN, CFG_MMU_PAGE, CFG_BP, CFG_NP_ASI, CFG_WRPSR)
port map (clkm, rstn, ahbmi, ahbmo(i), ahbsi, ahbso,
irqi(i), irqo(i), dbgi(i), dbgo(i));
end generate;
bus_error(0) <= not dbgo(0).error;
bus_error(1) <= rstn;
dsugen : if CFG_DSU = 1 generate
dsu0 : dsu3 -- LEON3 Debug Support Unit
generic map (hindex => 2, haddr => 16#900#, hmask => 16#F00#,
ncpu => NCPU, tbits => 30, tech => memtech, irq => 0, kbytes => CFG_ATBSZ)
port map (rstn, clkm, ahbmi, ahbsi, ahbso(2), dbgo, dbgi, dsui, dsuo);
dsui.enable <= '1';
-- dsubre_pad : inpad generic map (tech => padtech) port map (dsubre, dsui.break);
dsui.break <= gpioo.val(11); -- South Button
-- dsuact_pad : outpad generic map (tech => padtech) port map (dsuact, ndsuact);
led(4) <= dsuo.active;
end generate;
end generate;
nodsu : if CFG_DSU = 0 generate
dsuo.tstop <= '0'; dsuo.active <= '0';
end generate;
dcomgen : if CFG_AHB_UART = 1 generate
dcom0: ahbuart -- Debug UART
generic map (hindex => NCPU, pindex => 7, paddr => 7)
port map (rstn, clkm, dui, duo, apbi, apbo(7), ahbmi, ahbmo(NCPU));
-- dsurx_pad : inpad generic map (tech => padtech) port map (rxd1, dui.rxd);
-- dsutx_pad : outpad generic map (tech => padtech) port map (txd1, duo.txd);
dui.rxd <= rxd1 when gpioo.val(0) = '1' else '1';
end generate;
txd1 <= duo.txd when gpioo.val(0) = '1' else u1o.txd;
ahbjtaggen0 :if CFG_AHB_JTAG = 1 generate
ahbjtag0 : ahbjtag generic map(tech => fabtech, hindex => NCPU+CFG_AHB_UART)
port map(rstn, clkm, tck, tms, tdi, tdo, ahbmi, ahbmo(NCPU+CFG_AHB_UART),
open, open, open, open, open, open, open, gnd(0));
end generate;
----------------------------------------------------------------------
--- Memory controllers ----------------------------------------------
----------------------------------------------------------------------
memi.writen <= '1'; memi.wrn <= "1111"; memi.bwidth <= "01";
memi.brdyn <= '1'; memi.bexcn <= '1';
mctrl0 : if CFG_MCTRL_LEON2 = 1 generate
mctrl0 : mctrl generic map (hindex => 3, pindex => 0,
ramaddr => 16#400# + (CFG_DDR2SP+CFG_MIG_DDR2)*16#800#, rammask => 16#FE0#,
paddr => 0, srbanks => 1, ram8 => CFG_MCTRL_RAM8BIT,
ram16 => CFG_MCTRL_RAM16BIT, sden => CFG_MCTRL_SDEN,
invclk => CFG_MCTRL_INVCLK, sepbus => CFG_MCTRL_SEPBUS)
port map (rstn, clkm, memi, memo, ahbsi, ahbso(3), apbi, apbo(0), wpo, open);
end generate;
flash_adv_n_pad : outpad generic map (tech => padtech)
port map (flash_adv_n, gnd(0));
sram_adv_ld_n_pad : outpad generic map (tech => padtech)
port map (sram_adv_ld_n, gnd(0));
sram_mode_pad : outpad generic map (tech => padtech)
port map (sram_mode, gnd(0));
addr_pad : outpadv generic map (width => 24, tech => padtech)
port map (sram_flash_addr, memo.address(24 downto 1));
rams_pad : outpad generic map ( tech => padtech)
port map (sram_cen, memo.ramsn(0));
roms_pad : outpad generic map (tech => padtech)
port map (flash_ce, memo.romsn(0));
ramoen_pad : outpad generic map (tech => padtech)
port map (sram_oen, memo.ramoen(0));
flash_oen_pad : outpad generic map (tech => padtech)
port map (flash_oen, memo.oen);
--pragma translate_off
iosn_pad : outpad generic map (tech => padtech)
port map (iosn, memo.iosn);
--pragma translate_on
rwen_pad : outpadv generic map (width => 2, tech => padtech)
port map (sram_bw(0 to 1), memo.wrn(3 downto 2));
rwen_pad2 : outpadv generic map (width => 2, tech => padtech)
port map (sram_bw(2 to 3), memo.wrn(1 downto 0));
wri_pad : outpad generic map (tech => padtech)
port map (sram_flash_we_n, memo.writen);
data_pads : iopadvv generic map (tech => padtech, width => 16)
port map (sram_flash_data(15 downto 0), memo.data(31 downto 16),
memo.vbdrive(31 downto 16), memi.data(31 downto 16));
data_pads2 : iopadvv generic map (tech => padtech, width => 16)
port map (sram_flash_data(31 downto 16), memo.data(15 downto 0),
memo.vbdrive(15 downto 0), memi.data(15 downto 0));
migsp0 : if (CFG_MIG_DDR2 = 1) generate
ahb2mig0 : entity work.ahb2mig_ml50x
generic map ( hindex => 0, haddr => 16#400#, hmask => MIGHMASK,
MHz => 400, Mbyte => 512, nosync => 0) --boolean'pos(CFG_MIG_CLK4=12)) --CFG_CLKDIV/12)
port map (
rst_ahb => rstn, rst_ddr => rst0_tbn, clk_ahb => clkm, clk_ddr => clk0_tb,
ahbsi => ahbsi, ahbso => ahbso(0), migi => migi, migo => migo);
migv5 : mig_36_1
generic map (
CKE_WIDTH => CKE_WIDTH, CS_NUM => CS_NUM, CS_WIDTH => CS_WIDTH, CS_BITS => CS_BITS,
COL_WIDTH => COL_WIDTH, ROW_WIDTH => ROW_WIDTH,
NOCLK200 => true, SIM_ONLY => 1)
port map(
ddr2_dq => ddr2_dq(DQ_WIDTH-1 downto 0),
ddr2_a => ddr2_a(ROW_WIDTH-1 downto 0),
ddr2_ba => ddr2_ba(1 downto 0), ddr2_ras_n => ddr2_ras_n,
ddr2_cas_n => ddr2_cas_n, ddr2_we_n => ddr2_we_n,
ddr2_cs_n => ddr2_cs_n(CS_NUM-1 downto 0), ddr2_odt => ddr2_odt(0 downto 0),
ddr2_cke => ddr2_cke(CKE_WIDTH-1 downto 0),
ddr2_dm => ddr2_dm(DM_WIDTH-1 downto 0),
sys_clk => clk_200, idly_clk_200 => clk_200, sys_rst_n => rstraw,
phy_init_done => phy_init_done,
rst0_tb => rst0_tb, clk0_tb => clk0_tb,
app_wdf_afull => migo.app_wdf_afull,
app_af_afull => migo.app_af_afull,
rd_data_valid => migo.app_rd_data_valid,
app_wdf_wren => migi.app_wdf_wren,
app_af_wren => migi.app_en, app_af_addr => migi.app_addr,
app_af_cmd => migi.app_cmd,
rd_data_fifo_out => migo.app_rd_data, app_wdf_data => migi.app_wdf_data,
app_wdf_mask_data => migi.app_wdf_mask,
ddr2_dqs => ddr2_dqs(DQS_WIDTH-1 downto 0),
ddr2_dqs_n => ddr2_dqs_n(DQS_WIDTH-1 downto 0),
ddr2_ck => ddr2_ck((CLK_WIDTH-1) downto 0),
ddr2_ck_n => ddr2_ck_n((CLK_WIDTH-1) downto 0)
);
lock <= phy_init_done;
led(5) <= phy_init_done;
ddr2_a(13) <= '0';
ddr2_odt(1) <= '0';
ddr2_cs_n(1) <= '0';
end generate;
ddrsp0 : if (CFG_DDR2SP /= 0) and (CFG_MIG_DDR2 = 0) generate
ddrc0 : ddr2spa generic map ( fabtech => fabtech, memtech => memtech,
hindex => 0, haddr => 16#400#, hmask => 16#E00#, ioaddr => 1,
pwron => CFG_DDR2SP_INIT, MHz => BOARD_FREQ_200/1000, TRFC => CFG_DDR2SP_TRFC,
clkmul => CFG_DDR2SP_FREQ/10, clkdiv => 20, ahbfreq => CPU_FREQ/1000,
col => CFG_DDR2SP_COL, Mbyte => CFG_DDR2SP_SIZE, ddrbits => 64,
ddelayb0 => CFG_DDR2SP_DELAY0, ddelayb1 => CFG_DDR2SP_DELAY1,
ddelayb2 => CFG_DDR2SP_DELAY2, ddelayb3 => CFG_DDR2SP_DELAY3,
ddelayb4 => CFG_DDR2SP_DELAY4, ddelayb5 => CFG_DDR2SP_DELAY5,
ddelayb6 => CFG_DDR2SP_DELAY6, ddelayb7 => CFG_DDR2SP_DELAY7,
numidelctrl => 1, norefclk => 0, odten => 3, nclk => 2,
eightbanks => 1)
port map ( rst, rstn, clk_200, clkm, clk_200, lock,
clkml, clkml, ahbsi, ahbso(0),
ddr2_ck, ddr2_ck_n, ddr_clk_fb, ddr_clk_fb, ddr2_cke, ddr2_cs_n,
ddr2_we_n, ddr2_ras_n, ddr2_cas_n,
ddr2_dm, ddr2_dqs, ddr2_dqs_n, ddr2_a, ddr2_ba, ddr2_dq, ddr2_odt);
end generate;
noddr : if (CFG_DDR2SP = 0) and (CFG_MIG_DDR2 = 0) generate lock <= '1'; end generate;
----------------------------------------------------------------------
--- System ACE I/F Controller ---------------------------------------
----------------------------------------------------------------------
grace: if CFG_GRACECTRL = 1 generate
grace0 : gracectrl generic map (hindex => 4, hirq => 3,
haddr => 16#002#, hmask => 16#fff#, split => CFG_SPLIT)
port map (rstn, clkm, clkace, ahbsi, ahbso(4), acei, aceo);
end generate;
nograce: if CFG_GRACECTRL /= 1 generate
aceo <= gracectrl_none;
end generate;
sace_usb_a_pads : outpadv generic map (width => 7, tech => padtech)
port map (sace_usb_a, aceo.addr);
sace_mpce_pad : outpad generic map (tech => padtech)
port map (sace_mpce, aceo.cen);
sace_usb_d_pads : iopadv generic map (tech => padtech, width => 16)
port map (sace_usb_d, aceo.do, aceo.doen, acei.di);
sace_usb_oen_pad : outpad generic map (tech => padtech)
port map (sace_usb_oen, aceo.oen);
sace_usb_wen_pad : outpad generic map (tech => padtech)
port map (sace_usb_wen, aceo.wen);
sysace_mpirq_pad : inpad generic map (tech => padtech)
port map (sysace_mpirq, acei.irq);
----------------------------------------------------------------------
--- APB Bridge and various periherals -------------------------------
----------------------------------------------------------------------
bpromgen : if CFG_AHBROMEN /= 0 generate
brom : entity work.ahbrom
generic map (hindex => 6, haddr => CFG_AHBRODDR, pipe => CFG_AHBROPIP)
port map ( rstn, clkm, ahbsi, ahbso(6));
end generate;
----------------------------------------------------------------------
--- APB Bridge and various periherals -------------------------------
----------------------------------------------------------------------
apb0 : apbctrl -- AHB/APB bridge
generic map (hindex => 1, haddr => CFG_APBADDR, nslaves => 16)
port map (rstn, clkm, ahbsi, ahbso(1), apbi, apbo );
ua1 : if CFG_UART1_ENABLE /= 0 generate
uart1 : apbuart -- UART 1
generic map (pindex => 1, paddr => 1, pirq => 2, console => dbguart,
fifosize => CFG_UART1_FIFO)
port map (rstn, clkm, apbi, apbo(1), u1i, u1o);
u1i.extclk <= '0'; u1i.ctsn <= '0';
u1i.rxd <= rxd1 when gpioo.val(0) = '0' else '1';
end generate;
led(0) <= gpioo.val(0); led(1) <= not rxd1;
led(2) <= not duo.txd when gpioo.val(0) = '1' else not u1o.txd;
led (12 downto 6) <= (others => '0');
irqctrl : if CFG_IRQ3_ENABLE /= 0 generate
irqctrl0 : irqmp -- interrupt controller
generic map (pindex => 2, paddr => 2, ncpu => NCPU)
port map (rstn, clkm, apbi, apbo(2), irqo, irqi);
end generate;
irq3 : if CFG_IRQ3_ENABLE = 0 generate
x : for i in 0 to NCPU-1 generate
irqi(i).irl <= "0000";
end generate;
apbo(2) <= apb_none;
end generate;
gpt : if CFG_GPT_ENABLE /= 0 generate
timer0 : gptimer -- timer unit
generic map (pindex => 3, paddr => 3, pirq => CFG_GPT_IRQ,
sepirq => CFG_GPT_SEPIRQ, sbits => CFG_GPT_SW, ntimers => CFG_GPT_NTIM,
nbits => CFG_GPT_TW)
port map (rstn, clkm, apbi, apbo(3), gpti, gpto);
gpti.dhalt <= dsuo.tstop; gpti.extclk <= '0';
led(3) <= gpto.wdog;
end generate;
nogpt : if CFG_GPT_ENABLE = 0 generate apbo(3) <= apb_none; end generate;
kbd : if CFG_KBD_ENABLE /= 0 generate
ps21 : apbps2 generic map(pindex => 4, paddr => 4, pirq => 4)
port map(rstn, clkm, apbi, apbo(4), moui, mouo);
ps20 : apbps2 generic map(pindex => 5, paddr => 5, pirq => 5)
port map(rstn, clkm, apbi, apbo(5), kbdi, kbdo);
end generate;
nokbd : if CFG_KBD_ENABLE = 0 generate apbo(5) <= apb_none; kbdo <= ps2o_none; end generate;
kbdclk_pad : iopad generic map (tech => padtech)
port map (ps2_keyb_clk,kbdo.ps2_clk_o, kbdo.ps2_clk_oe, kbdi.ps2_clk_i);
kbdata_pad : iopad generic map (tech => padtech)
port map (ps2_keyb_data, kbdo.ps2_data_o, kbdo.ps2_data_oe, kbdi.ps2_data_i);
mouclk_pad : iopad generic map (tech => padtech)
port map (ps2_mouse_clk, mouo.ps2_clk_o, mouo.ps2_clk_oe, moui.ps2_clk_i);
mouata_pad : iopad generic map (tech => padtech)
port map (ps2_mouse_data, mouo.ps2_data_o, mouo.ps2_data_oe, moui.ps2_data_i);
vga : if CFG_VGA_ENABLE /= 0 generate
vga0 : apbvga generic map(memtech => memtech, pindex => 6, paddr => 6)
port map(rstn, clkm, clkvga, apbi, apbo(6), vgao);
clk_sel <= "00";
end generate;
svga : if CFG_SVGA_ENABLE /= 0 generate
svga0 : svgactrl generic map(memtech => memtech, pindex => 6, paddr => 6,
hindex => CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG,
clk0 => 40000, clk1 => 40000, clk2 => 25000, clk3 => 15385, burstlen => 6)
port map(rstn, clkm, clkvga, apbi, apbo(6), vgao, ahbmi,
ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG), clk_sel);
end generate;
vgadvi : if (CFG_VGA_ENABLE + CFG_SVGA_ENABLE) /= 0 generate
dvi0 : svga2ch7301c generic map (tech => fabtech, dynamic => 1)
port map (lclk, rstraw, clk_sel, vgao, clkvga, clk25, clk40, clk65,
clkvga, clk25, clk40, clk65, clkvga_p, clkvga_n,
vgalock, lcd_datal, lcd_hsyncl, lcd_vsyncl, lcd_del);
i2cdvi : i2cmst
generic map (pindex => 9, paddr => 9, pmask => 16#FFF#,
pirq => 6, filter => I2C_FILTER)
port map (rstn, clkm, apbi, apbo(9), dvi_i2ci, dvi_i2co);
end generate;
novga : if (CFG_VGA_ENABLE + CFG_SVGA_ENABLE) = 0 generate
apbo(6) <= apb_none; vgalock <= '1';
lcd_datal <= (others => '0'); clkvga_p <= '0'; clkvga_n <= '0';
lcd_hsyncl <= '0'; lcd_vsyncl <= '0'; lcd_del <= '0';
dvi_i2co.scloen <= '1'; dvi_i2co.sdaoen <= '1';
end generate;
tft_lcd_data_pad : outpadv generic map (width => 12, tech => padtech)
port map (tft_lcd_data, lcd_datal);
tft_lcd_clkp_pad : outpad generic map (tech => padtech)
port map (tft_lcd_clk_p, clkvga_p);
tft_lcd_clkn_pad : outpad generic map (tech => padtech)
port map (tft_lcd_clk_n, clkvga_n);
tft_lcd_hsync_pad : outpad generic map (tech => padtech)
port map (tft_lcd_hsync, lcd_hsyncl);
tft_lcd_vsync_pad : outpad generic map (tech => padtech)
port map (tft_lcd_vsync, lcd_vsyncl);
tft_lcd_de_pad : outpad generic map (tech => padtech)
port map (tft_lcd_de, lcd_del);
tft_lcd_reset_pad : outpad generic map (tech => padtech)
port map (tft_lcd_reset_b, rstn);
dvi_i2c_scl_pad : iopad generic map (tech => padtech)
port map (dvi_iic_scl, dvi_i2co.scl, dvi_i2co.scloen, dvi_i2ci.scl);
dvi_i2c_sda_pad : iopad generic map (tech => padtech)
port map (dvi_iic_sda, dvi_i2co.sda, dvi_i2co.sdaoen, dvi_i2ci.sda);
gpio0 : if CFG_GRGPIO_ENABLE /= 0 generate -- GPIO unit
grgpio0: grgpio
generic map(pindex => 8, paddr => 8, imask => 16#00F0#, nbits => 14)
port map(rst => rstn, clk => clkm, apbi => apbi, apbo => apbo(8),
gpioi => gpioi, gpioo => gpioo);
gpio_pads : iopadvv generic map (tech => padtech, width => 14)
port map (gpio, gpioo.dout(13 downto 0), gpioo.oen(13 downto 0),
gpioi.din(13 downto 0));
end generate;
ahbs : if CFG_AHBSTAT = 1 generate -- AHB status register
ahbstat0 : ahbstat generic map (pindex => 15, paddr => 15, pirq => 7,
nftslv => CFG_AHBSTATN)
port map (rstn, clkm, ahbmi, ahbsi, stati, apbi, apbo(15));
end generate;
i2cm: if CFG_I2C_ENABLE = 1 generate -- I2C master
i2c0 : i2cmst
generic map (pindex => 12, paddr => 12, pmask => 16#FFF#,
pirq => 11, filter => I2C_FILTER)
port map (rstn, clkm, apbi, apbo(12), i2ci, i2co);
i2c_scl_pad : iopad generic map (tech => padtech)
port map (iic_scl, i2co.scl, i2co.scloen, i2ci.scl);
i2c_sda_pad : iopad generic map (tech => padtech)
port map (iic_sda, i2co.sda, i2co.sdaoen, i2ci.sda);
end generate i2cm;
-----------------------------------------------------------------------
--- ETHERNET ---------------------------------------------------------
-----------------------------------------------------------------------
eth1 : if CFG_GRETH = 1 generate -- Gaisler ethernet MAC
e1 : grethm generic map(hindex => NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_SVGA_ENABLE,
pindex => 11, paddr => 11, pirq => 12, memtech => memtech,
mdcscaler => CPU_FREQ/1000, enable_mdio => 1, fifosize => CFG_ETH_FIFO,
nsync => 1, edcl => CFG_DSU_ETH, edclbufsz => CFG_ETH_BUF,
macaddrh => CFG_ETH_ENM, macaddrl => CFG_ETH_ENL, phyrstadr => 7,
ipaddrh => CFG_ETH_IPM, ipaddrl => CFG_ETH_IPL, giga => CFG_GRETH1G,
enable_mdint => 1)
port map( rst => rstn, clk => clkm, ahbmi => ahbmi,
ahbmo => ahbmo(NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_SVGA_ENABLE),
apbi => apbi, apbo => apbo(11), ethi => ethi, etho => etho);
emdio_pad : iopad generic map (tech => padtech)
port map (phy_mii_data, etho.mdio_o, etho.mdio_oe, ethi.mdio_i);
etxc_pad : clkpad generic map (tech => padtech, arch => 2)
port map (phy_tx_clk, ethi.tx_clk);
erxc_pad : clkpad generic map (tech => padtech, arch => 2)
port map (phy_rx_clk, ethi.rx_clk);
erxd_pad : inpadv generic map (tech => padtech, width => 8)
port map (phy_rx_data, ethi.rxd(7 downto 0));
erxdv_pad : inpad generic map (tech => padtech)
port map (phy_dv, ethi.rx_dv);
erxer_pad : inpad generic map (tech => padtech)
port map (phy_rx_er, ethi.rx_er);
erxco_pad : inpad generic map (tech => padtech)
port map (phy_col, ethi.rx_col);
erxcr_pad : inpad generic map (tech => padtech)
port map (phy_crs, ethi.rx_crs);
etxd_pad : outpadv generic map (tech => padtech, width => 8)
port map (phy_tx_data, etho.txd(7 downto 0));
etxen_pad : outpad generic map (tech => padtech)
port map ( phy_tx_en, etho.tx_en);
etxer_pad : outpad generic map (tech => padtech)
port map (phy_tx_er, etho.tx_er);
emdc_pad : outpad generic map (tech => padtech)
port map (phy_mii_clk, etho.mdc);
erst_pad : outpad generic map (tech => padtech)
port map (phy_rst_n, rstn);
emdintn_pad : inpad generic map (tech => padtech)
port map (phy_int, ethi.mdint);
ethi.gtx_clk <= egtx_clk;
end generate;
-----------------------------------------------------------------------
--- SYSTEM MONITOR ---------------------------------------------------
-----------------------------------------------------------------------
grsmon: if CFG_GRSYSMON = 1 generate
sysm0 : grsysmon generic map (tech => fabtech, hindex => 5,
hirq => 10, caddr => 16#003#, cmask => 16#fff#,
saddr => 16#004#, smask => 16#ffe#, split => CFG_SPLIT,
extconvst => 0, wrdalign => 1, INIT_40 => X"0000",
INIT_41 => X"0000", INIT_42 => X"0800", INIT_43 => X"0000",
INIT_44 => X"0000", INIT_45 => X"0000", INIT_46 => X"0000",
INIT_47 => X"0000", INIT_48 => X"0000", INIT_49 => X"0000",
INIT_4A => X"0000", INIT_4B => X"0000", INIT_4C => X"0000",
INIT_4D => X"0000", INIT_4E => X"0000", INIT_4F => X"0000",
INIT_50 => X"0000", INIT_51 => X"0000", INIT_52 => X"0000",
INIT_53 => X"0000", INIT_54 => X"0000", INIT_55 => X"0000",
INIT_56 => X"0000", INIT_57 => X"0000",
SIM_MONITOR_FILE => "sysmon.txt")
port map (rstn, clkm, ahbsi, ahbso(5), sysmoni, sysmono);
sysmoni <= grsysmon_in_gnd;
end generate grsmon;
-----------------------------------------------------------------------
--- AHB RAM ----------------------------------------------------------
-----------------------------------------------------------------------
ocram : if CFG_AHBRAMEN = 1 generate
ahbram0 : ahbram generic map (hindex => 7, haddr => CFG_AHBRADDR,
tech => CFG_MEMTECH, kbytes => CFG_AHBRSZ, pipe => CFG_AHBRPIPE)
port map ( rstn, clkm, ahbsi, ahbso(7));
end generate;
-----------------------------------------------------------------------
--- AHB DEBUG --------------------------------------------------------
-----------------------------------------------------------------------
-- dma0 : ahbdma
-- generic map (hindex => CFG_NCPU+CFG_AHB_UART+CFG_GRETH+CFG_AHB_JTAG,
-- pindex => 13, paddr => 13, dbuf => 6)
-- port map (rstn, clkm, apbi, apbo(13), ahbmi,
-- ahbmo(CFG_NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_SVGA_ENABLE+CFG_GRETH));
-- at0 : ahbtrace
-- generic map ( hindex => 7, ioaddr => 16#200#, iomask => 16#E00#,
-- tech => memtech, irq => 0, kbytes => 8)
-- port map ( rstn, clkm, ahbmi, ahbsi, ahbso(7));
-----------------------------------------------------------------------
--- Drive unused bus elements ---------------------------------------
-----------------------------------------------------------------------
-- nam1 : for i in (NCPU+CFG_AHB_UART+CFG_AHB_JTAG+CFG_SVGA_ENABLE+CFG_GRETH) to NAHBMST-1 generate
-- ahbmo(i) <= ahbm_none;
-- end generate;
-- nap0 : for i in 11 to NAPBSLV-1 generate apbo(i) <= apb_none; end generate;
-- nah0 : for i in 8 to NAHBSLV-1 generate ahbso(i) <= ahbs_none; end generate;
-----------------------------------------------------------------------
--- Boot message ----------------------------------------------------
-----------------------------------------------------------------------
-- pragma translate_off
x : report_design
generic map (
msg1 => system_table(XILINX_ML501),
fabtech => tech_table(fabtech), memtech => tech_table(memtech),
mdel => 1
);
-- pragma translate_on
end;
|
-- William Fan
-- 2/19/2011
-- 2 Digit Timer RTL
entity 2dtimer is
generic (fclk: integer := 50_000_000); --50MHz
port (ena, clk, rst: in bit;
ssdL, ssdR: out bit_vector(6 downto 0));
end entity;
architecture tdt of 2dtimer is
begin
process (clk, rst, ena)
variable ncounter: natural range 0 to fclk := 0;
variable counterR: natural range 0 to 10 := 0;
variable counterL: natural range 0 to 6 := 0;
begin
--- timer counter
if (rst='1') then
ncounter := 0;
counterR := 0;
counterL := 0;
elsif (rst='0') then
if (clk'event and clk='1') then
if (ena='1' and counterL<6) then
ncounter := ncounter + 1;
if (ncounter=fclk) then
ncounter := 0;
counterR := counterR + 1;
end if;
if (counterR=10) then
counterR := 0;
counterL := counterL + 1;
end if;
end if;
end if;
end if;
--- LCD driver
case counterR is
when 0 => ssdR<="0000001";
when 1 => ssdR<="1001111";
when 2 => ssdR<="0010010";
when 3 => ssdR<="0000110";
when 4 => ssdR<="1001100";
when 5 => ssdR<="0100100";
when 6 => ssdR<="0100000";
when 7 => ssdR<="0001111";
when 8 => ssdR<="0000000";
when 9 => ssdR<="0000100";
when others => ssdR<="0110000";
end case;
case counterL is
when 0 => ssdL<="0000001";
when 1 => ssdL<="1001111";
when 2 => ssdL<="0010010";
when 3 => ssdL<="0000110";
when 4 => ssdL<="1001100";
when 5 => ssdL<="0100100";
when 6 => ssdL<="0100000";
when others => ssdL<="0110000";
end case;
end process;
end architecture;
|
-- comment
library ieee;
use ieee.std_logic_1164.all;
--use work.abc.all;
entity enti is
generic (
bla : std_ulogic := '1';
bla1 : std_ulogic_vector(1 downto 0) := "-0";
bla2 : natural := 1;
bla3 : std_ulogic_vector := "00");
port (
bla4 : in std_ulogic;
bla5 : in std_ulogic);
end;
architecture rtl of enti is
begin -- architecture rtl
end architecture rtl;
architecture bhv of enti is
begin -- architecture bhv
end architecture bhv;
package pd is
constant c : natural;
end package pd;
package body pd is
constant c : natural := 1;
end package body pd;
entity enti2 is
end entity enti2;
entity enti3 is
begin
end entity;
architecture rtl of enti3 is
begin -- architecture rtl
end architecture rtl;
entity enti4 is
end enti4;
library ieee;
use ieee.std_logic_1164.all;
use work.pd.all;
architecture Rtl of enti4 is
constant c : natural := 1;
signal s : std_ulogic := '1';
type t1 is array (0 to 1) of std_ulogic_vector(7 downto 0);
type t2 is array (natural range <>) of std_ulogic_vector;
function f1 (
signal sig : std_ulogic_vector(1 to 9); constant c : in natural) return boolean is
variable v : natural := c;
begin
return false;
end;
signal d : std_ulogic_vector(8 downto 0);
component compi is
generic (
foo : std_ulogic);
port (
bar : in std_ulogic);
end component compi;
begin -- architecture rtl
enti_1 : entity work.enti
port map (
bla4 => '0',
bla5 => '0');
a : s <= '0';
d(1 downto 0) <= '1' & s;
g : for i in 1 to 3 generate
enti_2 : entity work.enti(rtl)
port map (
bla4 => '0',
bla5 => not s);
foo : if c = 1 generate
enti_3 : entity work.enti(bhv)
port map (
bla4 => '0',
bla5 => not s);
enti_4 : compi
generic map (
foo => '0')
port map (
bar => s);
end generate foo;
d(2) <= not s;
end generate;
p : process (s) is
constant s1 : integer := 2;
begin -- process bla
if s = '0' then -- asynchronous reset (active low)
elsif rising_edge(s) then -- rising clock edge
d(4) <= '1';
else
d(4) <=
d
(
d'left
)
nand
d(1);
end if;
assert d = "000000000" report "blubb";
assert d(s1) report "blubb";
assert d(s1) = not d(1) report "blubb";
for i in 0 to 1 loop
if i = 0 then
assert d(s1) = d(d'left) report "blubb" & integer'image(s1);
end if;
end loop; -- i
while true loop
case d is
when "111100000" => d <= "000000000";
when "111100001" => d <= (others => '0');
when others => null;
end case;
end loop;
end process p;
end architecture rtl;
|
------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2003 - 2008, Gaisler Research
-- Copyright (C) 2008 - 2014, Aeroflex Gaisler
-- Copyright (C) 2015 - 2016, Cobham Gaisler
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-----------------------------------------------------------------------------
-- Entity: ddrram
-- File: ddrram.vhd
-- Author: Magnus Hjorth, Aeroflex Gaisler
-- Description: Generic simulation model of DDR SDRAM (JESD79E)
------------------------------------------------------------------------------
--pragma translate_off
use std.textio.all;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library grlib;
use grlib.stdio.hread;
use grlib.stdlib.all;
entity ddrram is
generic (
width: integer := 32;
abits: integer range 12 to 14 := 12;
colbits: integer range 8 to 13 := 8;
rowbits: integer range 1 to 14 := 12;
implbanks: integer range 1 to 4 := 1;
fname: string;
lddelay: time := (0 ns);
speedbin: integer range 0 to 5 := 0; -- 0:DDR200,1:266,2:333,3:400C,4:400B,5:400A
density: integer range 0 to 3 := 0; -- 0:128Mbit 1:256Mbit 2:512Mbit 3:1Gbit / chip
igndqs: integer range 0 to 1 := 0
);
port (
ck: in std_ulogic;
cke: in std_ulogic;
csn: in std_ulogic;
rasn: in std_ulogic;
casn: in std_ulogic;
wen: in std_ulogic;
dm: in std_logic_vector(width/8-1 downto 0);
ba: in std_logic_vector(1 downto 0);
a: in std_logic_vector(abits-1 downto 0);
dq: inout std_logic_vector(width-1 downto 0);
dqs: inout std_logic_vector(width/8-1 downto 0)
);
end;
architecture sim of ddrram is
type moderegs is record
-- Mode register (0)
opmode: std_logic_vector(6 downto 0);
caslat: std_logic_vector(2 downto 0);
bt: std_ulogic;
blen: std_logic_vector(2 downto 0);
-- Extended mode register (1)
opmode1: std_logic_vector(10 downto 0);
res1: std_ulogic;
ds: std_ulogic;
dlldis: std_ulogic;
end record;
-- Mode registers as signal, useful for debugging
signal mr: moderegs;
-- Handshaking between command and DQ/DQS processes
signal read_en, write_en: boolean := false;
signal hcmode: boolean := false; -- Shift DQS/read data one cycle for CL=1.5/2.5
signal hcread_en: boolean := false; -- One cycle earlier for half-cycle mode read preamble gen
signal read_data, write_data: std_logic_vector(2*width-1 downto 0);
signal write_mask: std_logic_vector(width/4-1 downto 0);
signal initdone: boolean := false;
-- Small delta-t to adjust calculations for jitter tol.
constant deltat: time := 50 ps;
-- Timing parameters
constant tWR: time := 15 ns;
constant tMRD_ck: integer := 2;
type timetab is array (0 to 5) of time;
constant tRAS : timetab := (50 ns, 45 ns, 42 ns, 40 ns, 40 ns, 40 ns);
constant tRP : timetab := (20 ns, 20 ns, 18 ns, 18 ns, 15 ns, 15 ns);
constant tRCD: timetab := (20 ns, 20 ns, 18 ns, 18 ns, 15 ns, 15 ns);
constant tRRD: timetab := (15 ns, 15 ns, 12 ns, 10 ns, 10 ns, 10 ns);
constant tRFC_lt1G: timetab := (80 ns, 75 ns, 72 ns, 70 ns, 70 ns, 70 ns); --Assuming<1Gb
constant tRFC_mt1G: time := 120 ns;
function tRFC return time is
begin
if density < 3 then return tRFC_lt1G(speedbin);
else return tRFC_mt1G; end if;
end tRFC;
begin
-----------------------------------------------------------------------------
-- Init sequence checker
-----------------------------------------------------------------------------
initp: process
variable cyctr : integer := 0;
procedure checkcmd(crasn,ccasn,cwen: std_ulogic;
cba: std_logic_vector(1 downto 0);
a10,a8,a0: std_ulogic) is
begin
wait until rising_edge(ck);
cyctr := cyctr+1;
while cke='1' and (csn='1' or (rasn='1' and casn='1' and wen='1')) loop
wait until rising_edge(ck);
cyctr := cyctr+1;
end loop;
assert cke='1' and csn='0' and rasn=crasn and casn=ccasn and wen=cwen and
(cba="--" or cba=ba) and (a10='-' or a10=a(10)) and (a8='-' or a8=a(8)) and
(a0='-' or a0=a(0))
report "Wrong command during init sequence" severity warning;
end checkcmd;
begin
initdone <= false;
-- Allow cke to be X or U for a while during sim start
if is_x(cke) then
wait until not is_x(cke);
end if;
assert cke='0' report "CKE not deasserted on power-up" severity warning;
wait until cke/='0' for 200 us;
assert cke='0' report "CKE raised with less than 200 us init delay" severity warning;
wait until cke/='0' and rising_edge(ck);
assert cke='1' and (csn='1' or (rasn='1' and casn='1' and wen='1'));
-- Precharge all
checkcmd('0','1','0',"--",'1','-','-');
-- EMRS enable DLL
checkcmd('0','0','0',"01",'-','-','0');
-- MRS reset DLL
checkcmd('0','0','0',"00",'-','1','-');
cyctr := 0;
-- 200 cycle NOP
-- Precharge all
checkcmd('0','1','0',"--",'1','-','-');
assert cyctr >= 200
report "Command issued too quickly after DLL reset" severity warning;
-- 2 x auto refresh
checkcmd('0','0','1',"--",'-','-','-');
checkcmd('0','0','1',"--",'-','-','-');
-- MRS !reset DLL
checkcmd('0','0','0',"00",'-','0','-');
initdone <= true;
wait;
end process;
-----------------------------------------------------------------------------
-- Command state machine
-----------------------------------------------------------------------------
cmdp: process(ck)
subtype coldata is std_logic_vector(width-1 downto 0);
type coldata_arr is array(0 to implbanks*(2**(colbits+rowbits))-1) of coldata;
variable memdata: coldata_arr;
procedure load_srec is
file TCF : text open read_mode is fname;
variable L1: line;
variable CH : character;
variable rectype : std_logic_vector(3 downto 0);
variable recaddr : std_logic_vector(31 downto 0);
variable reclen : std_logic_vector(7 downto 0);
variable recdata : std_logic_vector(0 to 16*8-1);
variable col, coloffs, len: integer;
begin
L1:= new string'("");
while not endfile(TCF) loop
readline(TCF,L1);
if (L1'length /= 0) then
while (not (L1'length=0)) and (L1(L1'left) = ' ') loop
std.textio.read(L1,CH);
end loop;
if L1'length > 0 then
read(L1, ch);
if (ch = 'S') or (ch = 's') then
hread(L1, rectype);
hread(L1, reclen);
len := to_integer(unsigned(reclen))-1;
recaddr := (others => '0');
case rectype is
when "0001" => hread(L1, recaddr(15 downto 0)); len := len - 2;
when "0010" => hread(L1, recaddr(23 downto 0)); len := len - 3;
when "0011" => hread(L1, recaddr); len := len - 4;
when others => next;
end case;
hread(L1, recdata(0 to len*8-1));
col := to_integer(unsigned(recaddr(log2(width/8)+rowbits+colbits+1 downto log2(width/8))));
coloffs := 8*to_integer(unsigned(recaddr(log2(width/8)-1 downto 0)));
while len > width/8 loop
assert coloffs=0;
memdata(col) := recdata(0 to width-1);
col := col+1;
len := len-width/8;
recdata(0 to recdata'length-width-1) := recdata(width to recdata'length-1);
end loop;
memdata(col)(width-1-coloffs downto width-coloffs-len*8) := recdata(0 to len*8-1);
end if;
end if;
end if;
end loop;
end load_srec;
variable vmr: moderegs := ((others => '0'), "UUU", 'U', "UUU", (others => '0'), '0', '0', '0');
type bankstate is record
openrow: integer;
opentime: time;
closetime: time;
writetime: time;
autopch: integer;
end record;
type bankstate_arr is array(natural range <>) of bankstate;
variable banks: bankstate_arr(3 downto 0) := (others => (-1, 0 ns, 0 ns, 0 ns, -1));
type int_arr is array(natural range <>) of integer;
type dataacc is record
r,w: boolean;
col: int_arr(0 to 1);
bank: integer;
end record;
type dataacc_arr is array(natural range <>) of dataacc;
variable accpipe: dataacc_arr(0 to 9);
variable cmd: std_logic_vector(2 downto 0);
variable bank: integer;
variable colv: unsigned(a'high-1 downto 0);
variable alow: unsigned(2 downto 0);
variable col: integer;
variable prev_re, re: time;
variable blen: integer;
variable lastref: time := 0 ns;
variable i: integer;
variable b: boolean;
variable mrscount: integer := 0;
variable loaded: boolean := false;
procedure checktime(got, exp: time; gt: boolean; req: string) is
begin
assert (got + deltat > exp and gt) or (got-deltat < exp and not gt)
report (req & " violation, got: " & tost(got/(1 ps)) & " ps, exp: " & tost(exp/(1 ps)) & "ps")
severity warning;
end checktime;
begin
if rising_edge(ck) then
-- Update pipe regs
prev_re := re;
re := now;
accpipe(1 to accpipe'high) := accpipe(0 to accpipe'high-1);
accpipe(0).r:=false; accpipe(0).w:=false;
-- Main command handler
cmd := rasn & casn & wen;
if mrscount > 0 then
mrscount := mrscount-1;
assert cke='1' and (csn='1' or cmd="111") report "tMRS violation!" severity warning;
end if;
if cke='1' and csn='0' and cmd/="111" then
checktime(now-lastref, tRFC, true, "tRFC");
end if;
if cke='1' and csn='0' then
case cmd is
when "111" => -- NOP
when "011" => -- RAS
assert initdone report "Opening row before init sequence done!" severity warning;
bank := to_integer(unsigned(ba));
assert banks(bank).openrow < 0
report "Row already open" severity warning;
checktime(now-banks(bank).closetime, tRP(speedbin), true, "tRP");
for x in 0 to 3 loop
checktime(now-banks(x).opentime, tRRD(speedbin), true, "tRRD");
end loop;
banks(bank).openrow := to_integer(unsigned(a(rowbits-1 downto 0)));
banks(bank).opentime := now;
when "101" | "100" => -- Read/Write
bank := to_integer(unsigned(ba));
assert banks(bank).openrow >= 0
report "Row not open" severity error;
checktime(now-banks(bank).opentime, tRCD(speedbin), true, "tRCD");
for x in 0 to 3 loop
-- Xilinx V4 MIG controller issues multiple overlapping load commands
-- during calibration, therefore this assertion is bypassed before
-- load-delay has passed.
assert (not accpipe(x).r and not accpipe(x).w) or (now < lddelay);
end loop;
if cmd(0)='1' then accpipe(3).r:=true; else accpipe(3).w:=true; end if;
colv := unsigned(std_logic_vector'(a(a'high downto 11) & a(9 downto 0)));
case vmr.blen is
when "001" => blen := 2;
when "010" => blen := 4;
when "011" => blen := 8;
when others => assert false report "Invalid burst length setting in MR!" severity error;
end case;
alow := unsigned(a(2 downto 0));
for x in 0 to blen-1 loop
accpipe(3-x/2).bank := bank;
if cmd(0)='1' then accpipe(3-x/2).r:=true; else accpipe(3-x/2).w:=true; end if;
if vmr.bt='0' then -- Sequential
colv(log2(blen)-1 downto 0) := alow(log2(blen)-1 downto 0) + x;
else -- Interleaved
colv(log2(blen)-1 downto 0) := alow(log2(blen)-1 downto 0) xor to_unsigned(x,log2(blen));
end if;
col := to_integer(unsigned(ba))*(2**(colbits+rowbits)) +
banks(bank).openrow * (2**colbits) + to_integer(colv(colbits-1 downto 0));
accpipe(3-x/2).col(x mod 2) := col;
end loop;
-- Auto precharge
if a(10)='1' then
if cmd(0)='1' then
banks(bank).autopch := blen/2;
else
banks(bank).autopch := 1+blen/2 + (tWR-deltat+(re-prev_re))/(re-prev_re);
end if;
end if;
when "110" => -- Burst terminate
assert not accpipe(3).w
report "Burst terminate on write burst!" severity warning;
assert banks(accpipe(3).bank).autopch<0
report "Burst terminate on read with auto-precharge!" severity warning;
assert accpipe(3).r
report "Burst terminate with no effect!" severity warning;
for x in 3 downto 0 loop
accpipe(x).r := false;
accpipe(x).w := false;
end loop;
when "010" => -- Precharge
for x in 3 downto 0 loop
accpipe(x).r := false;
accpipe(x).w := false;
end loop;
for x in 0 to 3 loop
if a(10)='1' or ba=std_logic_vector(to_unsigned(x,2)) then
assert banks(x).autopch<0
report "Precharging bank that is auto-precharged" severity note;
assert a(10)='1' or banks(x).openrow>=0
report "Precharging single bank that is in idle state" severity note;
banks(x).autopch := 0; -- Handled below
end if;
end loop;
when "001" => -- Auto refresh
for x in 0 to 3 loop
assert banks(x).openrow < 0
report "Bank in wrong state for auto refresh!" severity warning;
checktime(now-banks(x).closetime, tRP(speedbin), true, "tRP");
end loop;
lastref := now;
when "000" => -- MRS
for x in 0 to 3 loop
checktime(now-banks(x).closetime, tRP(speedbin), true, "tRP");
end loop;
case ba is
when "00" =>
vmr.opmode(a'high-7 downto 0) := a(a'high downto 7);
vmr.caslat := a(6 downto 4);
vmr.bt := a(3);
vmr.blen := a(2 downto 0);
when "01" =>
vmr.opmode1(a'high-3 downto 0) := a(a'high downto 3);
vmr.res1 := a(2);
vmr.ds := a(1);
vmr.dlldis := a(0);
when others =>
assert false report ("MRS to invalid bank addr: " & std_logic'image(ba(1)) & std_logic'image(ba(0))) severity warning;
end case;
mrscount := tMRD_ck-1;
when others =>
assert false report ("Invalid command: " & std_logic'image(rasn) & std_logic'image(casn) & std_logic'image(wen)) severity warning;
end case;
end if;
-- Manual or auto precharge
for x in 0 to 3 loop
if banks(x).autopch=0 then
checktime(now-banks(x).writetime, tWR, true, "tWR");
checktime(now-banks(x).opentime, tRAS(speedbin), true, "tRAS");
banks(x).openrow := -1;
banks(x).closetime := now;
end if;
if banks(x).autopch >= 0 then
banks(x).autopch := banks(x).autopch - 1;
end if;
end loop;
-- Read/write management
if not loaded and lddelay < now then
load_srec;
loaded := true;
end if;
case vmr.caslat is
when "010" => i := 2; b:=false; -- CL2
when "011" => i := 3; b:=false; -- CL3
when "101" => i := 2; b:=true; -- CL1.5
when "110" => i := 3; b:=true; -- CL2.5
when others => i := 1;
end case;
hcmode <= b;
if b then hcread_en <= accpipe(1+i).r; else hcread_en <= false; end if;
if accpipe(2+i).r then
assert i>1 report "Incorrect CL setting!" severity warning;
read_en <= true;
-- print("Reading from col " & tost(accpipe(2+i).col(0)) & " and " & tost(accpipe(2+i).col(1)));
-- col0 <= accpipe(2+i).col(0); col1 <= accpipe(2+i).col(1);
read_data <= memdata(accpipe(2+i).col(0)) & memdata(accpipe(2+i).col(1));
else
read_en <= false;
end if;
write_en <= accpipe(3).w or accpipe(4).w;
if accpipe(5).w and write_mask/=(write_mask'range => '1') then
assert not is_x(write_mask) report "Write error";
for x in 0 to 1 loop
for b in width/8-1 downto 0 loop
if write_mask((1-x)*width/8+b)='0' then
memdata(accpipe(5).col(x))(8*b+7 downto 8*b) :=
write_data( (1-x)*width+b*8+7 downto (1-x)*width+b*8);
end if;
end loop;
end loop;
banks(accpipe(5).bank).writetime := now;
end if;
end if;
mr <= vmr;
end process;
-----------------------------------------------------------------------------
-- DQS/DQ handling and data sampling process
-----------------------------------------------------------------------------
dqproc: process
variable rdata: std_logic_vector(2*width-1 downto 0);
variable hdata: std_logic_vector(width-1 downto 0);
variable hmask: std_logic_vector(width/8-1 downto 0);
variable prevdqs: std_logic_vector(width/8-1 downto 0);
begin
dq <= (others => 'Z');
dqs <= (others => 'Z');
wait until (hcmode and hcread_en) or read_en or write_en;
assert not ((read_en or hcread_en) and write_en);
if (read_en or hcread_en) then
if hcmode then
wait until falling_edge(ck);
end if;
dqs <= (others => '0');
wait until falling_edge(ck);
while read_en loop
rdata := read_data;
if not hcmode then
wait until rising_edge(ck);
end if;
dqs <= (others => '1');
dq <= rdata(2*width-1 downto width);
if hcmode then
wait until rising_edge(ck);
else
wait until falling_edge(ck);
end if;
dqs <= (others => '0');
dq <= rdata(width-1 downto 0);
if hcmode then
wait until falling_edge(ck);
end if;
end loop;
if not hcmode then
wait until rising_edge(ck);
end if;
else
wait until falling_edge(ck);
assert to_X01(dqs)=(dqs'range => '0') or igndqs/=0;
while write_en loop
prevdqs := to_X01(dqs);
if igndqs /= 0 then
wait on ck,write_en;
else
wait until to_X01(dqs) /= prevdqs or not write_en or rising_edge(ck);
end if;
if rising_edge(ck) then
-- Just to make sure missing DQS is not undetected
write_data <= (others => 'X');
write_mask <= (others => 'X');
end if;
for x in dqs'range loop
if (igndqs=0 and prevdqs(x)='0' and to_X01(dqs(x))='1') or (igndqs/=0 and rising_edge(ck)) then
hdata(8*x+7 downto 8*x) := dq(8*x+7 downto 8*x);
hmask(x) := dm(x);
elsif (igndqs=0 and prevdqs(x)='1' and to_X01(dqs(x))='0') or (igndqs/=0 and falling_edge(ck)) then
write_data(width+8*x+7 downto width+8*x) <= hdata(8*x+7 downto 8*x);
write_data(8*x+7 downto 8*x) <= dq(8*x+7 downto 8*x);
write_mask(width/8+x) <= hmask(x);
write_mask(x) <= dm(x);
end if;
end loop;
end loop;
end if;
end process;
end;
-- pragma translate_on
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
-- ZPU
--
-- Copyright 2004-2008 oharboe - Øyvind Harboe - [email protected]
-- Copyright 2010-2012 Alvaro Lopes - [email protected]
--
-- The FreeBSD license
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
library board;
use board.zpu_config.all;
use board.zpupkg.all;
use board.wishbonepkg.all;
--library UNISIM;
--use UNISIM.vcomponents.all;
entity zpu_core_extreme is
port (
wb_clk_i: in std_logic;
wb_rst_i: in std_logic;
-- Master wishbone interface
wb_ack_i: in std_logic;
wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
wb_dat_o: out std_logic_vector(wordSize-1 downto 0);
wb_adr_o: out std_logic_vector(maxAddrBitIncIO downto 0);
wb_cyc_o: out std_logic;
wb_stb_o: out std_logic;
wb_we_o: out std_logic;
wb_inta_i: in std_logic;
poppc_inst: out std_logic;
break: out std_logic;
-- STACK
stack_a_read: in std_logic_vector(wordSize-1 downto 0);
stack_b_read: in std_logic_vector(wordSize-1 downto 0);
stack_a_write: out std_logic_vector(wordSize-1 downto 0);
stack_b_write: out std_logic_vector(wordSize-1 downto 0);
stack_a_writeenable: out std_logic;
stack_a_enable: out std_logic;
stack_b_writeenable: out std_logic;
stack_b_enable: out std_logic;
stack_a_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_b_addr: out std_logic_vector(stackSize_bits+1 downto 2);
stack_clk: out std_logic;
-- ROM wb interface
rom_wb_ack_i: in std_logic;
rom_wb_dat_i: in std_logic_vector(wordSize-1 downto 0);
rom_wb_adr_o: out std_logic_vector(maxAddrBit downto 0);
rom_wb_cyc_o: out std_logic;
rom_wb_stb_o: out std_logic;
rom_wb_cti_o: out std_logic_vector(2 downto 0);
rom_wb_stall_i: in std_logic;
-- Debug interface
dbg_out: out zpu_dbg_out_type;
dbg_in: in zpu_dbg_in_type
);
end zpu_core_extreme;
architecture behave of zpu_core_extreme is
component lshifter is
port (
clk: in std_logic;
rst: in std_logic;
enable: in std_logic;
done: out std_logic;
inputA: in std_logic_vector(31 downto 0);
inputB: in std_logic_vector(31 downto 0);
output: out std_logic_vector(63 downto 0);
multorshift: in std_logic
);
end component;
signal lshifter_enable: std_logic;
signal lshifter_done: std_logic;
signal lshifter_input: std_logic_vector(31 downto 0);
signal lshifter_amount: std_logic_vector(31 downto 0);
signal lshifter_output: std_logic_vector(63 downto 0);
signal lshifter_multorshift: std_logic;
signal begin_inst: std_logic;
signal trace_opcode: std_logic_vector(7 downto 0);
signal trace_pc: std_logic_vector(maxAddrBitIncIO downto 0);
signal trace_sp: std_logic_vector(maxAddrBitIncIO downto minAddrBit);
signal trace_topOfStack: std_logic_vector(wordSize-1 downto 0);
signal trace_topOfStackB: std_logic_vector(wordSize-1 downto 0);
-- state machine.
type State_Type is
(
State_Execute,
State_Store,
State_StoreB,
State_StoreB2,
State_Load,
State_LoadMemory,
State_LoadStack,
State_Loadb,
State_Resync1,
State_Resync2,
State_LoadSP,
State_WaitSPB,
State_ResyncFromStoreStack,
State_Neqbranch,
State_Ashiftleft,
State_Mult,
State_MultF16
);
type DecodedOpcodeType is
(
Decoded_Nop,
Decoded_Idle,
Decoded_Im0,
Decoded_ImN,
Decoded_LoadSP,
Decoded_Dup,
Decoded_DupStackB,
Decoded_StoreSP,
Decoded_Pop,
Decoded_PopDown,
Decoded_AddSP,
Decoded_AddStackB,
Decoded_Shift,
Decoded_Emulate,
Decoded_Break,
Decoded_PushSP,
Decoded_PopPC,
Decoded_Add,
Decoded_Or,
Decoded_And,
Decoded_Load,
Decoded_Not,
Decoded_Flip,
Decoded_Store,
Decoded_PopSP,
Decoded_Interrupt,
Decoded_Neqbranch,
Decoded_Eq,
Decoded_Storeb,
Decoded_Storeh,
Decoded_Ulessthan,
Decoded_Lessthan,
Decoded_Ashiftleft,
Decoded_Ashiftright,
Decoded_Loadb,
Decoded_Call,
Decoded_Mult,
Decoded_MultF16
);
constant spMaxBit: integer := 10;
constant minimal_implementation: boolean := false;
subtype index is integer range 0 to 3;
signal tOpcode_sel : index;
function pc_to_cpuword(pc: unsigned) return unsigned is
variable r: unsigned(wordSize-1 downto 0);
begin
r := (others => DontCareValue);
r(maxAddrBit downto 0) := pc;
return r;
end pc_to_cpuword;
function pc_to_memaddr(pc: unsigned) return unsigned is
variable r: unsigned(maxAddrBit downto 0);
begin
r := (others => '0');
r(maxAddrBit downto minAddrBit) := pc(maxAddrBit downto minAddrBit);
return r;
end pc_to_memaddr;
-- Prefetch stage registers
type stackChangeType is (
Stack_Same,
Stack_Push,
Stack_Pop,
Stack_DualPop
);
type tosSourceType is
(
Tos_Source_PC,
Tos_Source_FetchPC,
Tos_Source_Idim0,
Tos_Source_IdimN,
Tos_Source_StackB,
Tos_Source_SP,
Tos_Source_Add,
Tos_Source_And,
Tos_Source_Or,
Tos_Source_Eq,
Tos_Source_Not,
Tos_Source_Flip,
Tos_Source_LoadSP,
Tos_Source_AddSP,
Tos_Source_AddStackB,
Tos_Source_Shift,
Tos_Source_Ulessthan,
Tos_Source_Lessthan,
Tos_Source_None
);
type decoderstate_type is (
State_Run,
State_Jump,
State_Inject,
State_InjectJump
);
type decoderegs_type is record
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opWillFreeze: std_logic; -- '1' if we know in advance this opcode will freeze pipeline
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
pcint: unsigned(maxAddrBit downto 0);
idim: std_logic;
im: std_logic;
stackOperation: stackChangeType;
spOffset: unsigned(4 downto 0);
im_emu: std_logic;
--emumode: std_logic;
break: std_logic;
state: decoderstate_type;
end record;
type prefetchregs_type is record
sp: unsigned(spMaxBit downto 2);
spnext: unsigned(spMaxBit downto 2);
valid: std_logic;
decodedOpcode: DecodedOpcodeType;
tosSource: tosSourceType;
opcode: std_logic_vector(OpCode_Size-1 downto 0);
pc: unsigned(maxAddrBit downto 0);
fetchpc: unsigned(maxAddrBit downto 0);
idim: std_logic;
break: std_logic;
load: std_logic;
opWillFreeze: std_logic;
recompute_sp: std_logic;
end record;
type exuregs_type is record
idim: std_logic;
break: std_logic;
inInterrupt:std_logic;
tos: unsigned(wordSize-1 downto 0);
tos_save: unsigned(wordSize-1 downto 0);
nos_save: unsigned(wordSize-1 downto 0);
state: State_Type;
-- Wishbone control signals (registered)
wb_cyc: std_logic;
wb_stb: std_logic;
wb_we: std_logic;
end record;
-- Registers for each stage
signal exr: exuregs_type;
signal prefr: prefetchregs_type;
signal decr: decoderegs_type;
signal pcnext: unsigned(maxAddrBit downto 0); -- Helper only. TODO: move into variable
signal sp_load: unsigned(spMaxBit downto 2); -- SP value to load, coming from EXU into PFU
signal decode_load_sp: std_logic; -- Load SP signal from EXU to PFU
signal exu_busy: std_logic; -- EXU busy ( stalls PFU )
signal pfu_busy: std_logic; -- PFU busy ( stalls DFU )
signal decode_jump: std_logic; -- Jump signal from EXU to DFU
signal jump_address: unsigned(maxAddrBit downto 0); -- Jump address from EXU to DFU
signal do_interrupt: std_logic; -- Helper.
-- Sampled signals from the opcode. Left as signals
-- in order to simulate design.
signal sampledOpcode: std_logic_vector(OpCode_Size-1 downto 0);
signal sampledDecodedOpcode: DecodedOpcodeType;
signal sampledOpWillFreeze: std_logic;
signal sampledStackOperation: stackChangeType;
signal sampledspOffset: unsigned(4 downto 0);
signal sampledTosSource: tosSourceType;
signal nos: unsigned(wordSize-1 downto 0); -- This is only a helper
signal wroteback_q: std_logic; -- TODO: get rid of this here, move to EXU regs
-- Test debug signals
signal freeze_all: std_logic := '0';
signal single_step: std_logic := '0';
begin
-- Debug interface
dbg_out.pc <= std_logic_vector(prefr.pc);
dbg_out.opcode <= prefr.opcode;
dbg_out.sp <= std_logic_vector(prefr.sp);
dbg_out.brk <= exr.break;
dbg_out.stacka <= std_logic_vector(exr.tos);
dbg_out.stackb <= std_logic_vector(nos);
dbg_out.idim <= prefr.idim;
shl: lshifter
port map (
clk => wb_clk_i,
rst => wb_rst_i,
enable => lshifter_enable,
done => lshifter_done,
inputA => lshifter_input,
inputB => lshifter_amount,
output => lshifter_output,
multorshift => lshifter_multorshift
);
stack_clk <= wb_clk_i;
traceFileGenerate:
if Generate_Trace generate
trace_file: trace
port map (
clk => wb_clk_i,
begin_inst => begin_inst,
pc => trace_pc,
opcode => trace_opcode,
sp => trace_sp,
memA => trace_topOfStack,
memB => trace_topOfStackB,
busy => '0',--busy,
intsp => (others => 'U')
);
end generate;
tOpcode_sel <= to_integer(decr.pcint(minAddrBit-1 downto 0));
do_interrupt <= '1' when wb_inta_i='1'
and exr.inInterrupt='0'
else '0';
decodeControl:
process(rom_wb_dat_i, tOpcode_sel, sp_load, decr,
do_interrupt, dbg_in.inject, dbg_in.opcode)
variable tOpcode : std_logic_vector(OpCode_Size-1 downto 0);
variable localspOffset: unsigned(4 downto 0);
begin
if dbg_in.inject='1' then
tOpcode := dbg_in.opcode;
else
case (tOpcode_sel) is
when 0 => tOpcode := std_logic_vector(rom_wb_dat_i(31 downto 24));
when 1 => tOpcode := std_logic_vector(rom_wb_dat_i(23 downto 16));
when 2 => tOpcode := std_logic_vector(rom_wb_dat_i(15 downto 8));
when 3 => tOpcode := std_logic_vector(rom_wb_dat_i(7 downto 0));
when others =>
null;
end case;
end if;
sampledOpcode <= tOpcode;
sampledStackOperation <= Stack_Same;
sampledTosSource <= Tos_Source_None;
sampledOpWillFreeze <= '0';
localspOffset(4):=not tOpcode(4);
localspOffset(3 downto 0) := unsigned(tOpcode(3 downto 0));
if do_interrupt='1' and decr.im='0' then
sampledDecodedOpcode <= Decoded_Interrupt;
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_PC;
else
if (tOpcode(7 downto 7)=OpCode_Im) then
if decr.im='0' then
sampledStackOperation <= Stack_Push;
sampledTosSource <= Tos_Source_Idim0;
sampledDecodedOpcode<=Decoded_Im0;
else
sampledTosSource <= Tos_Source_IdimN;
sampledDecodedOpcode<=Decoded_ImN;
end if;
elsif (tOpcode(7 downto 5)=OpCode_StoreSP) then
sampledStackOperation <= Stack_Pop;
sampledTosSource <= Tos_Source_StackB;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Pop;
sampledTosSource <= Tos_Source_StackB;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_PopDown;
sampledTosSource <= Tos_Source_None;
else
sampledDecodedOpcode<=Decoded_StoreSP;
sampledOpWillFreeze<='1';
sampledTosSource <= Tos_Source_StackB;
end if;
elsif (tOpcode(7 downto 5)=OpCode_LoadSP) then
sampledStackOperation <= Stack_Push;
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Dup;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_DupStackB;
sampledTosSource <= Tos_Source_StackB;
else
sampledDecodedOpcode<=Decoded_LoadSP;
sampledTosSource <= Tos_Source_LoadSP;
end if;
elsif (tOpcode(7 downto 5)=OpCode_Emulate) then
-- Emulated instructions implemented in hardware
if minimal_implementation then
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
else
if (tOpcode(5 downto 0)=OpCode_Loadb) then
sampledStackOperation<=Stack_Same;
sampledDecodedOpcode<=Decoded_Loadb;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Neqbranch) then
sampledStackOperation<=Stack_DualPop;
sampledDecodedOpcode<=Decoded_Neqbranch;
sampledOpWillFreeze <= '1';
elsif (tOpcode(5 downto 0)=OpCode_Call) then
sampledDecodedOpcode<=Decoded_Call;
sampledStackOperation<=Stack_Same;
sampledTosSource<=Tos_Source_FetchPC;
elsif (tOpcode(5 downto 0)=OpCode_Eq) then
sampledDecodedOpcode<=Decoded_Eq;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Eq;
elsif (tOpcode(5 downto 0)=OpCode_Ulessthan) then
sampledDecodedOpcode<=Decoded_Ulessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Ulessthan;
elsif (tOpcode(5 downto 0)=OpCode_Lessthan) then
sampledDecodedOpcode<=Decoded_Lessthan;
sampledStackOperation<=Stack_Pop;
sampledTosSource<=Tos_Source_Lessthan;
elsif (tOpcode(5 downto 0)=OpCode_StoreB) then
sampledDecodedOpcode<=Decoded_StoreB;
sampledStackOperation<=Stack_DualPop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Mult) then
sampledDecodedOpcode<=Decoded_Mult;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
elsif (tOpcode(5 downto 0)=OpCode_Ashiftleft) then
sampledDecodedOpcode<=Decoded_Ashiftleft;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Emulate;
sampledStackOperation<=Stack_Push; -- will push PC
sampledTosSource <= Tos_Source_FetchPC;
end if;
end if;
elsif (tOpcode(7 downto 4)=OpCode_AddSP) then
if localspOffset=0 then
sampledDecodedOpcode<=Decoded_Shift;
sampledTosSource <= Tos_Source_Shift;
elsif localspOffset=1 then
sampledDecodedOpcode<=Decoded_AddStackB;
sampledTosSource <= Tos_Source_AddStackB;
else
sampledDecodedOpcode<=Decoded_AddSP;
sampledTosSource <= Tos_Source_AddSP;
end if;
else
case tOpcode(3 downto 0) is
when OpCode_Break =>
sampledDecodedOpcode<=Decoded_Break;
sampledOpWillFreeze <= '1';
when OpCode_PushSP =>
sampledStackOperation <= Stack_Push;
sampledDecodedOpcode<=Decoded_PushSP;
sampledTosSource <= Tos_Source_SP;
when OpCode_PopPC =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_PopPC;
sampledTosSource <= Tos_Source_StackB;
when OpCode_Add =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Add;
sampledTosSource <= Tos_Source_Add;
when OpCode_Or =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_Or;
sampledTosSource <= Tos_Source_Or;
when OpCode_And =>
sampledStackOperation <= Stack_Pop;
sampledDecodedOpcode<=Decoded_And;
sampledTosSource <= Tos_Source_And;
when OpCode_Load =>
sampledDecodedOpcode<=Decoded_Load;
sampledOpWillFreeze<='1';
when OpCode_Not =>
sampledDecodedOpcode<=Decoded_Not;
sampledTosSource <= Tos_Source_Not;
when OpCode_Flip =>
sampledDecodedOpcode<=Decoded_Flip;
sampledTosSource <= Tos_Source_Flip;
when OpCode_Store =>
sampledStackOperation <= Stack_DualPop;
sampledDecodedOpcode<=Decoded_Store;
sampledOpWillFreeze<='1';
when OpCode_PopSP =>
sampledDecodedOpcode<=Decoded_PopSP;
sampledOpWillFreeze<='1';
when OpCode_NA4 =>
if enable_fmul16 then
sampledDecodedOpcode<=Decoded_MultF16;
sampledStackOperation<=Stack_Pop;
sampledOpWillFreeze<='1';
else
sampledDecodedOpcode<=Decoded_Nop;
end if;
when others =>
sampledDecodedOpcode<=Decoded_Nop;
end case;
end if;
end if;
sampledspOffset <= localspOffset;
end process;
-- Decode/Fetch unit
rom_wb_stb_o <= not exu_busy;
process(decr, jump_address, decode_jump, wb_clk_i, sp_load,
sampledDecodedOpcode,sampledOpcode,decode_load_sp,
exu_busy, pfu_busy,
pcnext, rom_wb_ack_i, wb_rst_i, sampledStackOperation, sampledspOffset,
sampledTosSource, prefr.recompute_sp, sampledOpWillFreeze,
dbg_in.flush, dbg_in.inject,dbg_in.injectmode,
prefr.valid, prefr.break, rom_wb_stall_i
)
variable w: decoderegs_type;
begin
w := decr;
pcnext <= decr.fetchpc + 1;
rom_wb_adr_o <= std_logic_vector(pc_to_memaddr(decr.fetchpc));
rom_wb_cti_o <= CTI_CYCLE_INCRADDR;
if wb_rst_i='1' then
w.pc := (others => '0');
w.pcint := (others => '0');
w.valid := '0';
w.fetchpc := (others => '0');
w.im:='0';
w.im_emu:='0';
w.state := State_Run;
w.break := '0';
rom_wb_cyc_o <= '0';
else
rom_wb_cyc_o <= '1';
case decr.state is
when State_Run =>
if pfu_busy='0' then
if dbg_in.injectmode='0' and decr.break='0' and rom_wb_stall_i='0' then
w.fetchpc := pcnext;
end if;
-- Jump request
if decode_jump='1' then
w.valid := '0';
w.im := '0';
w.break := '0'; -- Invalidate eventual break after branch instruction
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o<='0';
--if rom_wb_stall_i='0' then
w.fetchpc := jump_address;
--else
w.state := State_Jump;
--end if;
else
if dbg_in.injectmode='1' then --or decr.break='1' then
-- At this point we ought to push a new op into the pipeline.
-- Since we're entering inject mode, invalidate next operation,
-- but save the current IM flag.
w.im_emu := decr.im;
w.valid := '0';
--rom_wb_cti_o <= CTI_CYCLE_ENDOFBURST;
rom_wb_cyc_o <='0';
-- Wait until no work is to be done
if prefr.valid='0' and decr.valid='0' and exu_busy='0' then
w.state := State_Inject;
w.im:='0';
end if;
if decr.break='0' then
w.pc := decr.pcint;
end if;
else
if decr.break='1' then
w.valid := '0';
else
w.valid := rom_wb_ack_i;
end if;
if rom_wb_ack_i='1' then
w.im := sampledOpcode(7);
if sampledDecodedOpcode=Decoded_Break then
w.break:='1';
end if;
end if;
if prefr.break='0' and rom_wb_stall_i='0' then
w.pcint := decr.fetchpc;
w.pc := decr.pcint;
end if;
if rom_wb_stall_i='0' then
w.opcode := sampledOpcode;
end if;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
when State_Jump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Run;
when State_InjectJump =>
w.valid := '0';
w.pcint := decr.fetchpc;
w.fetchpc := pcnext;
w.state := State_Inject;
when State_Inject =>
-- NOTE: disable ROM
rom_wb_cyc_o <= '0';
if dbg_in.injectmode='0' then
w.im := decr.im_emu;
w.fetchpc := decr.pcint;
w.state := State_Run;
w.break := '0';
else
-- Handle opcode injection
-- TODO: merge this with main decode.
-- NOTE: we don't check busy here, it's up to debug unit to do it
--if pfu_busy='0' then
--w.fetchpc := pcnext;
-- Jump request
if decode_jump='1' then
w.fetchpc := jump_address;
w.valid := '0';
w.im := '0';
w.state := State_InjectJump;
else
w.valid := dbg_in.inject;
if dbg_in.inject='1' then
w.im := sampledOpcode(7);
--w.break := '0';
--w.pcint := decr.fetchpc;
w.opcode := sampledOpcode;
--w.pc := decr.pcint;
end if;
end if;
w.opWillFreeze := sampledOpWillFreeze;
w.decodedOpcode := sampledDecodedOpcode;
w.stackOperation := sampledStackOperation;
w.spOffset := sampledspOffset;
w.tosSource := sampledTosSource;
w.idim := decr.im;
end if;
--end if;
end case;
end if; -- rst
if rising_edge(wb_clk_i) then
decr <= w;
end if;
end process;
-- Prefetch/Load unit.
sp_load <= exr.tos(spMaxBit downto 2); -- Will be delayed one clock cycle
process(wb_clk_i, wb_rst_i, decr, prefr, exu_busy, decode_jump, sp_load,
decode_load_sp, dbg_in.flush)
variable w: prefetchregs_type;
variable i_op_freeze: std_logic;
begin
w := prefr;
pfu_busy<='0';
stack_b_addr <= std_logic_vector(prefr.spnext + 1);
w.recompute_sp:='0';
-- Stack
w.load := decode_load_sp;
if decode_load_sp='1' then
pfu_busy <= '1';
w.spnext := sp_load;
w.recompute_sp := '1';
else
pfu_busy <= exu_busy;
if decr.valid='1' then
if (exu_busy='0' and decode_jump='0') or prefr.recompute_sp='1' then
case decr.stackOperation is
when Stack_Push =>
w.spnext := prefr.spnext - 1;
when Stack_Pop =>
w.spnext := prefr.spnext + 1;
when Stack_DualPop =>
w.spnext := prefr.spnext + 2;
when others =>
end case;
w.sp := prefr.spnext;
end if;
end if;
end if;
case decr.decodedOpcode is
when Decoded_LoadSP | decoded_AddSP =>
stack_b_addr <= std_logic_vector(prefr.spnext + decr.spOffset);
when others =>
end case;
if decode_jump='1' then -- this is a pipeline "invalidate" flag.
w.valid := '0';
else
if dbg_in.flush='1' then
w.valid := '0';
else
w.valid := decr.valid;
end if;
end if;
-- Moved op_will_freeze from decoder to here
case decr.decodedOpcode is
when Decoded_StoreSP
| Decoded_LoadB
| Decoded_Neqbranch
| Decoded_StoreB
| Decoded_Mult
| Decoded_Ashiftleft
| Decoded_Break
| Decoded_Load
| Decoded_Store
| Decoded_PopSP
| Decoded_MultF16 =>
i_op_freeze := '1';
when others =>
i_op_freeze := '0';
end case;
if exu_busy='0' then
w.decodedOpcode := decr.decodedOpcode;
w.tosSource := decr.tosSource;
w.opcode := decr.opcode;
w.opWillFreeze := i_op_freeze;
w.pc := decr.pc;
w.fetchpc := decr.pcint;
w.idim := decr.idim;
w.break := decr.break;
end if;
if wb_rst_i='1' then
w.spnext := unsigned(spStart(10 downto 2));
--w.sp := unsigned(spStart(10 downto 2));
w.valid := '0';
w.idim := '0';
w.recompute_sp:='0';
end if;
if rising_edge(wb_clk_i) then
prefr <= w;
end if;
end process;
process(prefr,exr,nos)
begin
trace_pc <= (others => '0');
trace_pc(maxAddrBit downto 0) <= std_logic_vector(prefr.pc);
trace_opcode <= prefr.opcode;
trace_sp <= (others => '0');
trace_sp(10 downto 2) <= std_logic_vector(prefr.sp);
trace_topOfStack <= std_logic_vector( exr.tos );
trace_topOfStackB <= std_logic_vector( nos );
end process;
-- IO/Memory Accesses
wb_adr_o(maxAddrBitIncIO downto 0) <= std_logic_vector(exr.tos_save(maxAddrBitIncIO downto 0));
wb_cyc_o <= exr.wb_cyc;
wb_stb_o <= exr.wb_stb;
wb_we_o <= exr.wb_we;
wb_dat_o <= std_logic_vector( exr.nos_save );
freeze_all <= dbg_in.freeze;
process(exr, wb_inta_i, wb_clk_i, wb_rst_i, pcnext, stack_a_read,stack_b_read,
wb_ack_i, wb_dat_i, do_interrupt,exr, prefr, nos,
single_step, freeze_all, dbg_in.step, wroteback_q,lshifter_done,lshifter_output
)
variable spOffset: unsigned(4 downto 0);
variable w: exuregs_type;
variable instruction_executed: std_logic;
variable wroteback: std_logic;
begin
w := exr;
instruction_executed := '0'; -- used for single stepping
stack_b_writeenable <= '0';
stack_a_enable <= '1';
stack_b_enable <= '1';
exu_busy <= '0';
decode_jump <= '0';
jump_address <= (others => DontCareValue);
lshifter_enable <= '0';
lshifter_amount <= std_logic_vector(exr.tos_save);
lshifter_input <= std_logic_vector(exr.nos_save);
lshifter_multorshift <= '0';
poppc_inst <= '0';
begin_inst<='0';
stack_a_addr <= std_logic_vector( prefr.sp );
stack_a_writeenable <= '0';
wroteback := wroteback_q;
stack_b_writeenable <= '0';
stack_a_write <= std_logic_vector(exr.tos);
spOffset(4):=not prefr.opcode(4);
spOffset(3 downto 0) := unsigned(prefr.opcode(3 downto 0));
if wb_inta_i='0' then
w.inInterrupt := '0';
end if;
stack_b_write<=(others => DontCareValue);
if wroteback_q='1' then
nos <= unsigned(stack_a_read);
else
nos <= unsigned(stack_b_read);
end if;
decode_load_sp <= '0';
case exr.state is
when State_Resync1 =>
exu_busy <= '1';
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_ResyncFromStoreStack =>
exu_busy <= '1';
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
w.state := State_Resync2;
wroteback := '0';
when State_Resync2 =>
w.tos := unsigned(stack_a_read);
instruction_executed := '1';
exu_busy <= '0';
wroteback := '0';
stack_b_enable <= '1';
w.state := State_Execute;
when State_Execute =>
instruction_executed:='0';
if prefr.valid='1' then
exu_busy <= prefr.opWillFreeze;
if freeze_all='0' or single_step='1' then
wroteback := '0';
w.nos_save := nos;
w.tos_save := exr.tos;
w.idim := prefr.idim;
w.break:= prefr.break;
begin_inst<='1';
instruction_executed := '1';
-- TOS big muxer
case prefr.tosSource is
when Tos_Source_PC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.pc;
when Tos_Source_FetchPC =>
w.tos := (others => '0');
w.tos(maxAddrBit downto 0) := prefr.fetchpc;
when Tos_Source_Idim0 =>
for i in wordSize-1 downto 7 loop
w.tos(i) := prefr.opcode(6);
end loop;
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_IdimN =>
w.tos(wordSize-1 downto 7) := exr.tos(wordSize-8 downto 0);
w.tos(6 downto 0) := unsigned(prefr.opcode(6 downto 0));
when Tos_Source_StackB =>
w.tos := nos;
when Tos_Source_SP =>
w.tos := (others => '0');
w.tos(31) := '1'; -- Stack address
w.tos(10 downto 2) := prefr.sp;
when Tos_Source_Add =>
w.tos := exr.tos + nos;
when Tos_Source_And =>
w.tos := exr.tos and nos;
when Tos_Source_Or =>
w.tos := exr.tos or nos;
when Tos_Source_Eq =>
w.tos := (others => '0');
if nos = exr.tos then
w.tos(0) := '1';
end if;
when Tos_Source_Ulessthan =>
w.tos := (others => '0');
if exr.tos < nos then
w.tos(0) := '1';
end if;
when Tos_Source_Lessthan =>
w.tos := (others => '0');
if signed(exr.tos) < signed(nos) then
w.tos(0) := '1';
end if;
when Tos_Source_Not =>
w.tos := not exr.tos;
when Tos_Source_Flip =>
for i in 0 to wordSize-1 loop
w.tos(i) := exr.tos(wordSize-1-i);
end loop;
when Tos_Source_LoadSP =>
w.tos := unsigned(stack_b_read);
when Tos_Source_AddSP =>
w.tos := w.tos + unsigned(stack_b_read);
when Tos_Source_AddStackB =>
w.tos := w.tos + nos;
when Tos_Source_Shift =>
w.tos := exr.tos + exr.tos;
when others =>
end case;
case prefr.decodedOpcode is
when Decoded_Interrupt =>
w.inInterrupt := '1';
jump_address <= to_unsigned(32, maxAddrBit+1);
decode_jump <= '1';
stack_a_writeenable<='1';
wroteback:='1';
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Im0 =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_ImN =>
when Decoded_Nop =>
when Decoded_PopPC | Decoded_Call =>
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0);
poppc_inst <= '1';
stack_b_enable<='0';
-- Delay
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_Emulate =>
decode_jump <= '1';
jump_address <= (others => '0');
jump_address(9 downto 5) <= unsigned(prefr.opcode(4 downto 0));
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_PushSP =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_LoadSP =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_DupStackB =>
stack_a_writeenable <= '1';
wroteback:='1';
when Decoded_Dup =>
stack_a_writeenable<='1';
wroteback:='1';
when Decoded_AddSP =>
stack_a_writeenable <= '1';
when Decoded_StoreSP =>
stack_a_writeenable <= '1';
wroteback:='1';
stack_a_addr <= std_logic_vector(prefr.sp + spOffset);
instruction_executed := '0';
w.state := State_WaitSPB;
when Decoded_PopDown =>
stack_a_writeenable<='1';
when Decoded_Pop =>
when Decoded_Ashiftleft =>
w.state := State_Ashiftleft;
when Decoded_Mult =>
w.state := State_Mult;
when Decoded_MultF16 =>
w.state := State_MultF16;
when Decoded_Store =>
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(nos);
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when Decoded_Load | Decoded_Loadb | Decoded_StoreB =>
--w.tos_save := exr.tos; -- Byte select
instruction_executed := '0';
wroteback := wroteback_q; -- Keep WB
if exr.tos(wordSize-1)='1' then
stack_a_addr<=std_logic_vector(exr.tos(10 downto 2));
stack_a_enable<='1';
w.state := State_LoadStack;
else
stack_a_enable <= '0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
w.wb_we :='0';
w.wb_cyc :='1';
w.wb_stb :='1';
w.state := State_Load;
end if;
when Decoded_PopSP =>
decode_load_sp <= '1';
instruction_executed := '0';
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
w.state := State_Resync2;
--when Decoded_Break =>
-- w.break := '1';
when Decoded_Neqbranch =>
instruction_executed := '0';
w.state := State_NeqBranch;
when others =>
end case;
else -- freeze_all
--
-- Freeze the entire pipeline.
--
exu_busy<='1';
stack_a_enable<='0';
stack_b_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
end if;
end if; -- valid
when State_Ashiftleft =>
exu_busy <= '1';
lshifter_enable <= '1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_Mult =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(31 downto 0));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_MultF16 =>
exu_busy <= '1';
lshifter_enable <= '1';
lshifter_multorshift <='1';
w.tos := unsigned(lshifter_output(47 downto 16));
if lshifter_done='1' then
exu_busy<='0';
w.state := State_Execute;
end if;
when State_WaitSPB =>
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Store =>
exu_busy <= '1';
-- Keep writeback flag
wroteback := wroteback_q;
if wb_ack_i='1' then
stack_a_addr <= std_logic_vector(prefr.spnext);
stack_a_enable<='1';
stack_b_enable<='1';
wroteback := '0';
--exu_busy <= '1';
w.wb_cyc := '0';
w.state := State_Resync2;
else
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_a_enable<='0';
stack_b_enable<='0';
end if;
when State_Loadb =>
w.tos(wordSize-1 downto 8) := (others => '0');
case exr.tos_save(1 downto 0) is
when "11" =>
w.tos(7 downto 0) := unsigned(exr.tos(7 downto 0));
when "10" =>
w.tos(7 downto 0) := unsigned(exr.tos(15 downto 8));
when "01" =>
w.tos(7 downto 0) := unsigned(exr.tos(23 downto 16));
when "00" =>
w.tos(7 downto 0) := unsigned(exr.tos(31 downto 24));
when others =>
null;
end case;
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
when State_Load =>
if wb_ack_i='0' then
exu_busy<='1';
else
w.tos := unsigned(wb_dat_i);
w.wb_cyc := '0';
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state := State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state := State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
end if;
when State_LoadStack =>
w.tos := unsigned(stack_a_read);
if prefr.decodedOpcode=Decoded_Loadb then
exu_busy<='1';
w.state:=State_Loadb;
elsif prefr.decodedOpcode=Decoded_Storeb then
exu_busy<='1';
w.state:=State_Storeb;
else
instruction_executed:='1';
wroteback := '0';
w.state := State_Execute;
end if;
when State_NeqBranch =>
if exr.nos_save/=0 then
decode_jump <= '1';
jump_address <= exr.tos(maxAddrBit downto 0) + prefr.pc;
poppc_inst <= '1';
exu_busy <= '0';
else
exu_busy <='1';
end if;
instruction_executed := '0';
stack_a_addr <= std_logic_vector(prefr.spnext);
wroteback:='0';
w.state := State_Resync2;
when State_StoreB =>
exu_busy <= '1';
--
-- At this point, we have loaded the 32-bit, and it's in TOS
-- The IO address is still saved in save_TOS.
-- The original write value is still at save_NOS
--
-- So we mangle the write value, and update save_NOS, and restore
-- the IO address to TOS
--
-- This is still buggy - don't use. Problems arise when writing to stack.
--
w.nos_save := exr.tos;
case exr.tos_save(1 downto 0) is
when "00" =>
w.nos_save(31 downto 24) := exr.nos_save(7 downto 0);
when "01" =>
w.nos_save(23 downto 16) := exr.nos_save(7 downto 0);
when "10" =>
w.nos_save(15 downto 8) := exr.nos_save(7 downto 0);
when "11" =>
w.nos_save(7 downto 0) := exr.nos_save(7 downto 0);
when others =>
null;
end case;
w.tos := exr.tos_save;
w.state := State_StoreB2;
when State_StoreB2 =>
exu_busy <= '1';
if exr.tos(31)='1' then
stack_a_addr <= std_logic_vector(exr.tos(10 downto 2));
stack_a_write <= std_logic_vector(exr.nos_save); -- hmm I don't like this
stack_a_writeenable<='1';
w.state := State_ResyncFromStoreStack;
else
w.wb_we := '1';
w.wb_cyc := '1';
w.wb_stb := '1';
wroteback := wroteback_q; -- Keep WB
stack_a_enable<='0';
stack_a_addr <= (others => DontCareValue);
stack_a_write <= (others => DontCareValue);
stack_b_enable<='0';
instruction_executed := '0';
w.state := State_Store;
end if;
when others =>
null;
end case;
if rising_edge(wb_clk_i) then
if wb_rst_i='1' then
exr.state <= State_Execute;
exr.idim <= DontCareValue;
exr.inInterrupt <= '0';
exr.break <= '0';
exr.wb_cyc <= '0';
exr.wb_stb <= '1';
else
exr <= w;
-- TODO: move wroteback_q into EXU regs
wroteback_q <= wroteback;
if exr.break='1' then
report "BREAK" severity failure;
end if;
-- Some sanity checks, to be caught in simulation
if prefr.valid='1' then
if prefr.tosSource=Tos_Source_Idim0 and prefr.idim='1' then
report "Invalid IDIM flag 0" severity error;
end if;
if prefr.tosSource=Tos_Source_IdimN and prefr.idim='0' then
report "Invalid IDIM flag 1" severity error;
end if;
end if;
end if;
end if;
end process;
single_step <= dbg_in.step;
dbg_out.valid <= '1' when prefr.valid='1' else '0';
-- Let pipeline finish
dbg_out.ready <= '1' when exr.state=state_execute
and decode_load_sp='0'
and decode_jump='0'
and decr.state = State_Inject
--and jump_q='0'
else '0';
end behave;
|
library ieee ;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.fixed_pkg.all;
use work.filter_pkg.all;
entity FIR is
generic (
wordLength : natural := 32;
fractionalBits : natural := 31;
coeffWordLength : natural := 12;
coeffFractionalBits : natural := 11;
sumWordLength : natural := 32;
sumFractionalBits : natural := 31;
outputWordLength : natural := 32;
outputFractionalBits : natural := 31;
order : natural := 6;
coefficients : coefficient_array := (
-0.0390625,
0.0,
0.28759765625,
0.5,
0.28759765625,
0.0,
-0.0390625
)
);
port (
input : in std_logic_vector(wordLength-1 downto 0);
output : out std_logic_vector(outputWordLength-1 downto 0);
clk : in std_logic;
reset : in std_logic
);
end entity ; -- FIR
architecture arch of FIR is
type signalArray is array(0 to order) of std_logic_vector(wordLength-1 downto 0);
type sumArray is array(0 to order) of std_logic_vector(sumWordLength-1 downto 0);
signal inputs : signalArray := (others => (others => '0'));
signal gainedInputs : sumArray := (others => (others => '0'));
signal sums : sumArray := (others => (others => '0'));
begin
inputs(0) <= input;
output <= sums(0)(sumFractionalBits-outputFractionalBits+outputWordLength-1 downto sumFractionalBits-outputFractionalBits);
sums(order) <= gainedInputs(order);
delays : for i in 0 to order-1 generate
-- Delay stages
delay : entity work.VectorRegister
generic map (
wordLength => wordLength
)
port map (
input => inputs(i),
output => inputs(i+1),
clk => clk,
reset => reset
);
-- Output summation
adder : entity work.AdderSat
generic map (
wordLength => sumWordLength
)
port map (
a => gainedInputs(i),
b => sums(i+1),
s => sums(i)
);
end generate ; -- delays
multiplication : for i in 0 to order generate
mult : entity work.Multiplier
generic map (
X_WIDTH => wordLength,
X_FRACTION => fractionalBits,
Y_WIDTH => coeffWordLength,
Y_FRACTION => coeffFractionalBits,
S_WIDTH => sumWordLength,
S_FRACTION => sumFractionalBits
)
port map (
x => inputs(i),
y => real_to_fixed(coefficients(i), coeffWordLength, coeffFractionalBits),
s => gainedInputs(i)
);
end generate;
end architecture ; -- arch |
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity right_shift is
generic (
SHIFT_BITS : positive := 1;
WORD_WIDTH : positive := 8;
NUM_WORDS : positive := 2);
port (
clk : in std_logic;
rst : in std_logic;
en : in std_logic := '1';
input : in std_logic_vector(WORD_WIDTH*NUM_WORDS-1 downto 0);
shift_amount : in std_logic_vector(SHIFT_BITS-1 downto 0);
output : out std_logic_vector(WORD_WIDTH*NUM_WORDS-1 downto 0);
valid_in : in std_logic;
valid_out : out std_logic);
end right_shift;
architecture DEFAULT of right_shift is
constant LEVELS : positive := SHIFT_BITS;
type word_array is array (0 to LEVELS-1, 0 to NUM_WORDS-1) of std_logic_vector(WORD_WIDTH-1 downto 0);
signal words : word_array;
type input_array is array (0 to NUM_WORDS-1) of std_logic_vector(WORD_WIDTH-1 downto 0);
signal inputs : input_array;
type shift_array is array (0 to LEVELS-1) of std_logic_vector(SHIFT_BITS-1 downto 0);
signal shift : shift_array;
begin
-- convert input vector into 2d array
process(input)
begin
for i in 0 to NUM_WORDS-1 loop
inputs(i) <= input(input'length-i*WORD_WIDTH-1 downto input'length-(i+1)*WORD_WIDTH);
end loop;
end process;
process(clk, rst)
begin
if (rst = '1') then
for i in 0 to LEVELS-1 loop
for j in 0 to NUM_WORDS-1 loop
words(i, j) <= (others => '0');
end loop;
shift(i) <= (others => '0');
end loop;
elsif (rising_edge(clk)) then
-- level 0
for j in 0 to NUM_WORDS-1 loop
if (en = '1') then
if (shift_amount(LEVELS-1) = '1') then
if (j-2**(LEVELS-1) < 0) then
words(0, j) <= (others => '0');
else
words(0, j) <= inputs(j-2**(LEVELS-1));
end if;
else
words(0, j) <= inputs(j);
end if;
shift(0) <= shift_amount;
end if;
end loop;
for i in 1 to LEVELS-1 loop
shift(i) <= shift(i-1);
for j in 0 to NUM_WORDS-1 loop
if (en = '1') then
if (shift(i-1)(LEVELS-i-1) = '1') then
-- if word to shift from doesn't exist, shift in 0
-- else, shift in words based on the level
if (j-2**(LEVELS-i-1) < 0) then
words(i, j) <= (others => '0');
else
words(i, j) <= words(i-1, j-2**(LEVELS-i-1));
end if;
else
words(i, j) <= words(i-1, j);
end if;
end if;
end loop;
end loop;
end if;
end process;
process(words)
begin
for i in 0 to NUM_WORDS-1 loop
output((NUM_WORDS-i)*WORD_WIDTH-1 downto (NUM_WORDS-i-1)*WORD_WIDTH) <= words(LEVELS-1, i);
end loop;
end process;
U_DELAY : entity work.delay
generic map (
width => 1,
cycles => LEVELS,
init => "0")
port map (
clk => clk,
rst => rst,
en => en,
input(0) => valid_in,
output(0) => valid_out);
end DEFAULT;
|
library work;
use work.sample_pkg.all;
entity pkg_test is
port (
o : out integer
);
end pkg_test;
architecture rtl of pkg_test is
begin
o <= SAMPLE_CONSTANT;
end rtl;
|
----------------------------------------------------------------------------------
-- Company: LARC - Escola Politecnica - University of Sao Paulo
-- Engineer: Pedro Maat C. Massolino
--
-- Create Date: 05/12/2012
-- Design Name: Pipeline_Polynomial_Calc_v4
-- Module Name: Pipeline_Polynomial_Calc_v4
-- Project Name: McEliece Goppa Decoder
-- Target Devices: Any
-- Tool versions: Xilinx ISE 13.3 WebPack
--
-- Description:
--
-- The 1st and 3rd step in Goppa Code Decoding.
--
-- This circuit is to be used inside polynomial_syndrome_computing_n to evaluate polynomials
-- or generate the syndrome.
-- This circuit is the essential for 1 pipeline, therefor all stages are composed in here.
-- For more than 1 pipeline, only in polynomial_syndrome_computing_n with the shared components
-- for all pipelines.
--
-- For the computation this circuit applies the Horner scheme, where at each stage
-- an accumulator is multiplied by respective x and then added accumulated with coefficient.
-- In Horner scheme algorithm, it begin from the most significative coefficient until reaches
-- lesser significative coefficient.
--
-- The circuits parameters
--
-- gf_2_m :
--
-- The size of the field used in this circuit. This parameter depends of the
-- Goppa code used.
--
-- size :
--
-- The number of stages the pipeline has. More stages means more values of value_polynomial
-- are tested at once.
--
-- Dependencies:
-- VHDL-93
--
-- stage_polynomial_calc_v4 Rev 1.0
-- register_nbits Rev 1.0
--
-- Revision:
-- Revision 1.0
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity pipeline_polynomial_calc_v4 is
Generic (
gf_2_m : integer range 1 to 20;
size : integer
);
Port (
value_x : in STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
value_polynomial : in STD_LOGIC_VECTOR((((gf_2_m)*size) - 1) downto 0);
value_acc : in STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
reg_x_rst : in STD_LOGIC_VECTOR((size - 1) downto 0);
mode_polynomial_syndrome : in STD_LOGIC;
clk : in STD_LOGIC;
new_value_syndrome : out STD_LOGIC_VECTOR((((gf_2_m)*size) - 1) downto 0);
new_value_acc : out STD_LOGIC_VECTOR((gf_2_m - 1) downto 0)
);
end pipeline_polynomial_calc_v4;
architecture Behavioral of pipeline_polynomial_calc_v4 is
component stage_polynomial_calc_v4
Generic(gf_2_m : integer range 1 to 20 := 11);
Port (
value_x : in STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
value_polynomial_coefficient : in STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
value_acc : in STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
mode_polynomial_syndrome : in STD_LOGIC;
new_value_syndrome : out STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
new_value_acc : out STD_LOGIC_VECTOR((gf_2_m - 1) downto 0)
);
end component;
component register_nbits
Generic(size : integer);
Port(
d : in STD_LOGIC_VECTOR((size - 1) downto 0);
clk : in STD_LOGIC;
ce : in STD_LOGIC;
q : out STD_LOGIC_VECTOR((size - 1) downto 0)
);
end component;
component register_rst_nbits
Generic(size : integer);
Port(
d : in STD_LOGIC_VECTOR((size - 1) downto 0);
clk : in STD_LOGIC;
ce : in STD_LOGIC;
rst : in STD_LOGIC;
rst_value : in STD_LOGIC_VECTOR((size - 1) downto 0);
q : out STD_LOGIC_VECTOR((size - 1) downto 0)
);
end component;
type array_std_logic_vector is array(integer range <>) of STD_LOGIC_VECTOR((gf_2_m - 1) downto 0);
signal acc_d : array_std_logic_vector((size) downto 0);
signal acc_q : array_std_logic_vector((size) downto 0);
signal x_d : array_std_logic_vector((size) downto 0);
signal x_q : array_std_logic_vector((size - 1) downto 0);
constant reg_x_rst_value : STD_LOGIC_VECTOR((gf_2_m - 1) downto 0) := std_logic_vector(to_unsigned(1, gf_2_m));
begin
x_d(0) <= value_x;
acc_d(0) <= value_acc;
pipeline : for I in 0 to (size - 1) generate
reg_x_I : register_rst_nbits
Generic Map(size => gf_2_m)
Port Map(
d => x_d(I),
clk => clk,
ce => '1',
rst => reg_x_rst(I),
rst_value => reg_x_rst_value,
q => x_q(I)
);
reg_acc_I : register_nbits
Generic Map(size => gf_2_m)
Port Map(
d => acc_d(I),
clk => clk,
ce => '1',
q => acc_q(I)
);
stage_I : stage_polynomial_calc_v4
Generic Map(gf_2_m => gf_2_m)
Port Map (
value_x => x_q(I),
value_polynomial_coefficient => value_polynomial(((gf_2_m)*(I+1) - 1) downto ((gf_2_m)*(I))),
mode_polynomial_syndrome => mode_polynomial_syndrome,
value_acc => acc_q(I),
new_value_syndrome => new_value_syndrome(((gf_2_m)*(I+1) - 1) downto ((gf_2_m)*(I))),
new_value_acc => acc_d(I+1)
);
x_d(I+1) <= x_q(I);
end generate;
reg_acc_last : register_nbits
Generic Map(size => gf_2_m)
Port Map(
d => acc_d(size),
clk => clk,
ce => '1',
q => acc_q(size)
);
new_value_acc <= acc_q(size);
end Behavioral; |
--------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 12:38:04 12/18/2013
-- Design Name:
-- Module Name: /home/nakayama/Desktop/583final/BO_Tests/Digit_Test.vhd
-- Project Name: BO_Tests
-- Target Device:
-- Tool versions:
-- Description:
--
-- VHDL Test Bench Created by ISE for module: Digit
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
-- Notes:
-- This testbench has been automatically generated using types std_logic and
-- std_logic_vector for the ports of the unit under test. Xilinx recommends
-- that these types always be used for the top-level I/O of a design in order
-- to guarantee that the testbench will bind correctly to the post-implementation
-- simulation model.
--------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
use ieee.numeric_std.all;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--USE ieee.numeric_std.ALL;
ENTITY Digit_Test IS
END Digit_Test;
ARCHITECTURE behavior OF Digit_Test IS
-- Component Declaration for the Unit Under Test (UUT)
COMPONENT Digit
PORT(
rainbow : IN std_logic;
number : IN std_logic_vector(3 downto 0);
x : IN std_logic_vector(2 downto 0);
y : IN std_logic_vector(2 downto 0);
R : OUT std_logic_vector(3 downto 0);
G : OUT std_logic_vector(3 downto 0);
B : OUT std_logic_vector(3 downto 0)
);
END COMPONENT;
--Inputs
signal rainbow : std_logic := '0';
signal number : std_logic_vector(3 downto 0) := (others => '0');
signal x : unsigned(2 downto 0) := (others => '0');
signal y : unsigned(2 downto 0) := (others => '0');
--Outputs
signal R : std_logic_vector(3 downto 0);
signal G : std_logic_vector(3 downto 0);
signal B : std_logic_vector(3 downto 0);
-- No clocks detected in port list. Replace <clock> below with
-- appropriate port name
signal clk : std_logic := '0';
constant clk_period : time := 40 ns;
BEGIN
-- Instantiate the Unit Under Test (UUT)
uut: Digit PORT MAP (
rainbow => rainbow,
number => number,
x => std_logic_vector(x),
y => std_logic_vector(y),
R => R,
G => G,
B => B
);
-- Clock process definitions
clk_process :process
begin
clk <= '0';
wait for clk_period/2;
clk <= '1';
wait for clk_period/2;
end process;
process(clk)
begin
--On the rising edge of the clock increment the x and y values.
if(clk'event and clk='1') then
x <= x + 1;
if(x = 0) then
y <= y + 1;
end if;
end if;
end process;
-- Stimulus process
stim_proc: process
begin
-- hold reset state for 100 ns.
wait for 100 ns;
rainbow <= '1';
number <= x"0";
-- insert stimulus here
wait;
end process;
END;
|
entity FIFO is
end entity;
entity FIFO is
end entity;
|
--------------------------------------------------------------------------------
--
-- FIFO Generator Core Demo Testbench
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2009 - 2010 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--------------------------------------------------------------------------------
--
-- Filename: k7_eb_fifo_counted_resized_rng.vhd
--
-- Description:
-- Used for generation of pseudo random numbers
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.std_logic_unsigned.all;
USE IEEE.std_logic_arith.all;
USE IEEE.std_logic_misc.all;
ENTITY k7_eb_fifo_counted_resized_rng IS
GENERIC (
WIDTH : integer := 8;
SEED : integer := 3);
PORT (
CLK : IN STD_LOGIC;
RESET : IN STD_LOGIC;
ENABLE : IN STD_LOGIC;
RANDOM_NUM : OUT STD_LOGIC_VECTOR (WIDTH-1 DOWNTO 0));
END ENTITY;
ARCHITECTURE rg_arch OF k7_eb_fifo_counted_resized_rng IS
BEGIN
PROCESS (CLK,RESET)
VARIABLE rand_temp : STD_LOGIC_VECTOR(width-1 DOWNTO 0):=conv_std_logic_vector(SEED,width);
VARIABLE temp : STD_LOGIC := '0';
BEGIN
IF(RESET = '1') THEN
rand_temp := conv_std_logic_vector(SEED,width);
temp := '0';
ELSIF (CLK'event AND CLK = '1') THEN
IF (ENABLE = '1') THEN
temp := rand_temp(width-1) xnor rand_temp(width-3) xnor rand_temp(width-4) xnor rand_temp(width-5);
rand_temp(width-1 DOWNTO 1) := rand_temp(width-2 DOWNTO 0);
rand_temp(0) := temp;
END IF;
END IF;
RANDOM_NUM <= rand_temp;
END PROCESS;
END ARCHITECTURE;
|
-----------------------------------------------------------------------------
-- LEON3 Demonstration design test bench configuration
-- Copyright (C) 2009 Aeroflex Gaisler
------------------------------------------------------------------------------
library techmap;
use techmap.gencomp.all;
package config is
-- Technology and synthesis options
constant CFG_FABTECH : integer := altera;
constant CFG_MEMTECH : integer := altera;
constant CFG_PADTECH : integer := altera;
constant CFG_NOASYNC : integer := 0;
constant CFG_SCAN : integer := 0;
-- Clock generator
constant CFG_CLKTECH : integer := altera;
constant CFG_CLKMUL : integer := (2);
constant CFG_CLKDIV : integer := (2);
constant CFG_OCLKDIV : integer := 1;
constant CFG_OCLKBDIV : integer := 0;
constant CFG_OCLKCDIV : integer := 0;
constant CFG_PCIDLL : integer := 0;
constant CFG_PCISYSCLK: integer := 0;
constant CFG_CLK_NOFB : integer := 0;
-- LEON3 processor core
constant CFG_LEON3 : integer := 1;
constant CFG_NCPU : integer := (1);
constant CFG_NWIN : integer := (8);
constant CFG_V8 : integer := 2 + 4*0;
constant CFG_MAC : integer := 0;
constant CFG_BP : integer := 0;
constant CFG_SVT : integer := 1;
constant CFG_RSTADDR : integer := 16#00000#;
constant CFG_LDDEL : integer := (1);
constant CFG_NOTAG : integer := 0;
constant CFG_NWP : integer := (2);
constant CFG_PWD : integer := 1*2;
constant CFG_FPU : integer := 0 + 16*0 + 32*0;
constant CFG_GRFPUSH : integer := 0;
constant CFG_ICEN : integer := 1;
constant CFG_ISETS : integer := 1;
constant CFG_ISETSZ : integer := 4;
constant CFG_ILINE : integer := 8;
constant CFG_IREPL : integer := 0;
constant CFG_ILOCK : integer := 0;
constant CFG_ILRAMEN : integer := 0;
constant CFG_ILRAMADDR: integer := 16#8E#;
constant CFG_ILRAMSZ : integer := 1;
constant CFG_DCEN : integer := 1;
constant CFG_DSETS : integer := 1;
constant CFG_DSETSZ : integer := 4;
constant CFG_DLINE : integer := 8;
constant CFG_DREPL : integer := 0;
constant CFG_DLOCK : integer := 0;
constant CFG_DSNOOP : integer := 1 + 0 + 4*0;
constant CFG_DFIXED : integer := 16#0#;
constant CFG_DLRAMEN : integer := 0;
constant CFG_DLRAMADDR: integer := 16#8F#;
constant CFG_DLRAMSZ : integer := 1;
constant CFG_MMUEN : integer := 1;
constant CFG_ITLBNUM : integer := 8;
constant CFG_DTLBNUM : integer := 8;
constant CFG_TLB_TYPE : integer := 0 + 1*2;
constant CFG_TLB_REP : integer := 0;
constant CFG_MMU_PAGE : integer := 0;
constant CFG_DSU : integer := 1;
constant CFG_ITBSZ : integer := 1;
constant CFG_ATBSZ : integer := 1;
constant CFG_LEON3FT_EN : integer := 0;
constant CFG_IUFT_EN : integer := 0;
constant CFG_FPUFT_EN : integer := 0;
constant CFG_RF_ERRINJ : integer := 0;
constant CFG_CACHE_FT_EN : integer := 0;
constant CFG_CACHE_ERRINJ : integer := 0;
constant CFG_LEON3_NETLIST: integer := 0;
constant CFG_DISAS : integer := 0 + 0;
constant CFG_PCLOW : integer := 2;
-- AMBA settings
constant CFG_DEFMST : integer := (0);
constant CFG_RROBIN : integer := 1;
constant CFG_SPLIT : integer := 0;
constant CFG_FPNPEN : integer := 0;
constant CFG_AHBIO : integer := 16#FFF#;
constant CFG_APBADDR : integer := 16#800#;
constant CFG_AHB_MON : integer := 0;
constant CFG_AHB_MONERR : integer := 0;
constant CFG_AHB_MONWAR : integer := 0;
constant CFG_AHB_DTRACE : integer := 0;
-- DSU UART
constant CFG_AHB_UART : integer := 1;
-- JTAG based DSU interface
constant CFG_AHB_JTAG : integer := 1;
-- PROM/SRAM controller
constant CFG_SRCTRL : integer := 0;
constant CFG_SRCTRL_PROMWS : integer := 0;
constant CFG_SRCTRL_RAMWS : integer := 0;
constant CFG_SRCTRL_IOWS : integer := 0;
constant CFG_SRCTRL_RMW : integer := 0;
constant CFG_SRCTRL_8BIT : integer := 0;
constant CFG_SRCTRL_SRBANKS : integer := 1;
constant CFG_SRCTRL_BANKSZ : integer := 0;
constant CFG_SRCTRL_ROMASEL : integer := 0;
-- LEON2 memory controller
constant CFG_MCTRL_LEON2 : integer := 1;
constant CFG_MCTRL_RAM8BIT : integer := 1;
constant CFG_MCTRL_RAM16BIT : integer := 0;
constant CFG_MCTRL_5CS : integer := 0;
constant CFG_MCTRL_SDEN : integer := 1;
constant CFG_MCTRL_SEPBUS : integer := 1;
constant CFG_MCTRL_INVCLK : integer := 0;
constant CFG_MCTRL_SD64 : integer := 0;
constant CFG_MCTRL_PAGE : integer := 0 + 0;
-- AHB ROM
constant CFG_AHBROMEN : integer := 0;
constant CFG_AHBROPIP : integer := 0;
constant CFG_AHBRODDR : integer := 16#000#;
constant CFG_ROMADDR : integer := 16#000#;
constant CFG_ROMMASK : integer := 16#E00# + 16#000#;
-- AHB RAM
constant CFG_AHBRAMEN : integer := 0;
constant CFG_AHBRSZ : integer := 1;
constant CFG_AHBRADDR : integer := 16#A00#;
constant CFG_AHBRPIPE : integer := 0;
-- UART 1
constant CFG_UART1_ENABLE : integer := 1;
constant CFG_UART1_FIFO : integer := 8;
-- LEON3 interrupt controller
constant CFG_IRQ3_ENABLE : integer := 1;
constant CFG_IRQ3_NSEC : integer := 0;
-- Modular timer
constant CFG_GPT_ENABLE : integer := 1;
constant CFG_GPT_NTIM : integer := (2);
constant CFG_GPT_SW : integer := (8);
constant CFG_GPT_TW : integer := (32);
constant CFG_GPT_IRQ : integer := (8);
constant CFG_GPT_SEPIRQ : integer := 1;
constant CFG_GPT_WDOGEN : integer := 0;
constant CFG_GPT_WDOG : integer := 16#0#;
-- GPIO port
constant CFG_GRGPIO_ENABLE : integer := 1;
constant CFG_GRGPIO_IMASK : integer := 16#000F#;
constant CFG_GRGPIO_WIDTH : integer := (2);
-- GRLIB debugging
constant CFG_DUART : integer := 0;
end;
|
-- NEED RESULT: ARCH00078.P1: Multi transport transactions occurred on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078.P2: Multi transport transactions occurred on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078.P3: Multi transport transactions occurred on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078: One transport transaction occurred on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078: Old transactions were removed on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078: One transport transaction occurred on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078: Old transactions were removed on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078: One transport transaction occurred on signal asg with indexed name on LHS passed
-- NEED RESULT: ARCH00078: Old transactions were removed on signal asg with indexed name on LHS passed
-- NEED RESULT: P3: Transport transactions entirely completed passed
-- NEED RESULT: P2: Transport transactions entirely completed passed
-- NEED RESULT: P1: Transport transactions entirely completed passed
-------------------------------------------------------------------------------
--
-- Copyright (c) 1989 by Intermetrics, Inc.
-- All rights reserved.
--
-------------------------------------------------------------------------------
--
-- TEST NAME:
--
-- CT00078
--
-- AUTHOR:
--
-- G. Tominovich
--
-- TEST OBJECTIVES:
--
-- 8.3 (2)
-- 8.3 (3)
-- 8.3 (5)
-- 8.3.1 (3)
--
-- DESIGN UNIT ORDERING:
--
-- E00000(ARCH00078)
-- ENT00078_Test_Bench(ARCH00078_Test_Bench)
--
-- REVISION HISTORY:
--
-- 07-JUL-1987 - initial revision
--
-- NOTES:
--
-- self-checking
-- automatically generated
--
use WORK.STANDARD_TYPES.all ;
architecture ARCH00078 of E00000 is
subtype chk_sig_type is integer range -1 to 100 ;
signal chk_st_arr1 : chk_sig_type := -1 ;
signal chk_st_arr2 : chk_sig_type := -1 ;
signal chk_st_arr3 : chk_sig_type := -1 ;
--
signal s_st_arr1 : st_arr1
:= c_st_arr1_1 ;
signal s_st_arr2 : st_arr2
:= c_st_arr2_1 ;
signal s_st_arr3 : st_arr3
:= c_st_arr3_1 ;
--
begin
PGEN_CHKP_1 :
process ( chk_st_arr1 )
begin
if Std.Standard.Now > 0 ns then
test_report ( "P1" ,
"Transport transactions entirely completed",
chk_st_arr1 = 4 ) ;
end if ;
end process PGEN_CHKP_1 ;
--
P1 :
process ( s_st_arr1 )
variable correct : boolean ;
variable counter : integer := 0 ;
variable savtime : time ;
--
procedure Proc1 is
begin
case counter is
when 0 =>
s_st_arr1 (st_arr1'Left) <= transport
c_st_arr1_2 (st_arr1'Right) after 10 ns,
c_st_arr1_1 (st_arr1'Right) after 20 ns ;
--
when 1 =>
correct :=
s_st_arr1 (st_arr1'Left) =
c_st_arr1_2 (st_arr1'Right) and
(savtime + 10 ns) = Std.Standard.Now ;
--
when 2 =>
correct :=
correct and
s_st_arr1 (st_arr1'Left) =
c_st_arr1_1 (st_arr1'Right) and
(savtime + 10 ns) = Std.Standard.Now ;
test_report ( "ARCH00078.P1" ,
"Multi transport transactions occurred on signal " &
"asg with indexed name on LHS",
correct ) ;
s_st_arr1 (st_arr1'Left) <= transport
c_st_arr1_2 (st_arr1'Right) after 10 ns,
c_st_arr1_1 (st_arr1'Right) after 20 ns,
c_st_arr1_2 (st_arr1'Right) after 30 ns,
c_st_arr1_1 (st_arr1'Right) after 40 ns ;
--
when 3 =>
correct :=
s_st_arr1 (st_arr1'Left) =
c_st_arr1_2 (st_arr1'Right) and
(savtime + 10 ns) = Std.Standard.Now ;
s_st_arr1 (st_arr1'Left) <= transport
c_st_arr1_1 (st_arr1'Right) after 5 ns;
--
when 4 =>
correct :=
correct and
s_st_arr1 (st_arr1'Left) =
c_st_arr1_1 (st_arr1'Right) and
(savtime + 5 ns) = Std.Standard.Now ;
test_report ( "ARCH00078" ,
"One transport transaction occurred on signal " &
"asg with indexed name on LHS",
correct ) ;
test_report ( "ARCH00078" ,
"Old transactions were removed on signal " &
"asg with indexed name on LHS",
correct ) ;
--
when others
=> -- No more transactions should have occurred
test_report ( "ARCH00078" ,
"Old transactions were removed on signal " &
"asg with indexed name on LHS",
false ) ;
--
end case ;
--
savtime := Std.Standard.Now ;
chk_st_arr1 <= transport counter after (1 us - savtime) ;
counter := counter + 1;
--
end Proc1 ;
--
begin
Proc1 ;
end process P1 ;
--
PGEN_CHKP_2 :
process ( chk_st_arr2 )
begin
if Std.Standard.Now > 0 ns then
test_report ( "P2" ,
"Transport transactions entirely completed",
chk_st_arr2 = 4 ) ;
end if ;
end process PGEN_CHKP_2 ;
--
P2 :
process ( s_st_arr2 )
variable correct : boolean ;
variable counter : integer := 0 ;
variable savtime : time ;
--
procedure Proc1 is
begin
case counter is
when 0 =>
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) <= transport
c_st_arr2_2 (
st_arr2'Right(1),st_arr2'Right(2)) after 10 ns,
c_st_arr2_1 (
st_arr2'Right(1),st_arr2'Right(2)) after 20 ns ;
--
when 1 =>
correct :=
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) =
c_st_arr2_2 (
st_arr2'Right(1),st_arr2'Right(2)) and
(savtime + 10 ns) = Std.Standard.Now ;
--
when 2 =>
correct :=
correct and
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) =
c_st_arr2_1 (
st_arr2'Right(1),st_arr2'Right(2)) and
(savtime + 10 ns) = Std.Standard.Now ;
test_report ( "ARCH00078.P2" ,
"Multi transport transactions occurred on signal " &
"asg with indexed name on LHS",
correct ) ;
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) <= transport
c_st_arr2_2 (
st_arr2'Right(1),st_arr2'Right(2)) after 10 ns,
c_st_arr2_1 (
st_arr2'Right(1),st_arr2'Right(2)) after 20 ns,
c_st_arr2_2 (
st_arr2'Right(1),st_arr2'Right(2)) after 30 ns,
c_st_arr2_1 (
st_arr2'Right(1),st_arr2'Right(2)) after 40 ns ;
--
when 3 =>
correct :=
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) =
c_st_arr2_2 (
st_arr2'Right(1),st_arr2'Right(2)) and
(savtime + 10 ns) = Std.Standard.Now ;
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) <= transport
c_st_arr2_1 (
st_arr2'Right(1),st_arr2'Right(2)) after 5 ns;
--
when 4 =>
correct :=
correct and
s_st_arr2 (
st_arr2'Left(1),st_arr2'Left(2)) =
c_st_arr2_1 (
st_arr2'Right(1),st_arr2'Right(2)) and
(savtime + 5 ns) = Std.Standard.Now ;
test_report ( "ARCH00078" ,
"One transport transaction occurred on signal " &
"asg with indexed name on LHS",
correct ) ;
test_report ( "ARCH00078" ,
"Old transactions were removed on signal " &
"asg with indexed name on LHS",
correct ) ;
--
when others
=> -- No more transactions should have occurred
test_report ( "ARCH00078" ,
"Old transactions were removed on signal " &
"asg with indexed name on LHS",
false ) ;
--
end case ;
--
savtime := Std.Standard.Now ;
chk_st_arr2 <= transport counter after (1 us - savtime) ;
counter := counter + 1;
--
end Proc1 ;
--
begin
Proc1 ;
end process P2 ;
--
PGEN_CHKP_3 :
process ( chk_st_arr3 )
begin
if Std.Standard.Now > 0 ns then
test_report ( "P3" ,
"Transport transactions entirely completed",
chk_st_arr3 = 4 ) ;
end if ;
end process PGEN_CHKP_3 ;
--
P3 :
process ( s_st_arr3 )
variable correct : boolean ;
variable counter : integer := 0 ;
variable savtime : time ;
--
procedure Proc1 is
begin
case counter is
when 0 =>
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) <= transport
c_st_arr3_2 (
st_arr3'Right(1),st_arr3'Right(2)) after 10 ns,
c_st_arr3_1 (
st_arr3'Right(1),st_arr3'Right(2)) after 20 ns ;
--
when 1 =>
correct :=
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) =
c_st_arr3_2 (
st_arr3'Right(1),st_arr3'Right(2)) and
(savtime + 10 ns) = Std.Standard.Now ;
--
when 2 =>
correct :=
correct and
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) =
c_st_arr3_1 (
st_arr3'Right(1),st_arr3'Right(2)) and
(savtime + 10 ns) = Std.Standard.Now ;
test_report ( "ARCH00078.P3" ,
"Multi transport transactions occurred on signal " &
"asg with indexed name on LHS",
correct ) ;
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) <= transport
c_st_arr3_2 (
st_arr3'Right(1),st_arr3'Right(2)) after 10 ns,
c_st_arr3_1 (
st_arr3'Right(1),st_arr3'Right(2)) after 20 ns,
c_st_arr3_2 (
st_arr3'Right(1),st_arr3'Right(2)) after 30 ns,
c_st_arr3_1 (
st_arr3'Right(1),st_arr3'Right(2)) after 40 ns ;
--
when 3 =>
correct :=
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) =
c_st_arr3_2 (
st_arr3'Right(1),st_arr3'Right(2)) and
(savtime + 10 ns) = Std.Standard.Now ;
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) <= transport
c_st_arr3_1 (
st_arr3'Right(1),st_arr3'Right(2)) after 5 ns;
--
when 4 =>
correct :=
correct and
s_st_arr3 (
st_arr3'Left(1),st_arr3'Left(2)) =
c_st_arr3_1 (
st_arr3'Right(1),st_arr3'Right(2)) and
(savtime + 5 ns) = Std.Standard.Now ;
test_report ( "ARCH00078" ,
"One transport transaction occurred on signal " &
"asg with indexed name on LHS",
correct ) ;
test_report ( "ARCH00078" ,
"Old transactions were removed on signal " &
"asg with indexed name on LHS",
correct ) ;
--
when others
=> -- No more transactions should have occurred
test_report ( "ARCH00078" ,
"Old transactions were removed on signal " &
"asg with indexed name on LHS",
false ) ;
--
end case ;
--
savtime := Std.Standard.Now ;
chk_st_arr3 <= transport counter after (1 us - savtime) ;
counter := counter + 1;
--
end Proc1 ;
--
begin
Proc1 ;
end process P3 ;
--
--
end ARCH00078 ;
--
entity ENT00078_Test_Bench is
end ENT00078_Test_Bench ;
--
architecture ARCH00078_Test_Bench of ENT00078_Test_Bench is
begin
L1:
block
component UUT
end component ;
for CIS1 : UUT use entity WORK.E00000 ( ARCH00078 ) ;
begin
CIS1 : UUT ;
end block L1 ;
end ARCH00078_Test_Bench ;
|
----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 12:01:25 10/17/2014
-- Design Name:
-- Module Name: shiftled - Behavioral
-- Project Name:
-- Target Devices:
-- Tool versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;
-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
entity shiftled is
Port ( clk : in STD_LOGIC;
E : in STD_LOGIC;
Q : out STD_LOGIC_VECTOR (7 downto 0));
end shiftled;
architecture Behavioral of shiftled is
signal count : std_logic_vector (7 downto 0):= x"01";
begin
process(clk)
begin
if clk'event and clk='1' then
if E='1' then
count<= count(6 downto 0) & count(7);
end if;
end if;
end process;
Q <= count;
end Behavioral;
|
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_arith.ALL;
use IEEE.STD_LOGIC_unsigned.ALL;
entity WindowsManager is
Port ( cwp : in STD_LOGIC;
rs1 : in STD_LOGIC_VECTOR (4 downto 0);
rs2 : in STD_LOGIC_VECTOR (4 downto 0);
rd : in STD_LOGIC_VECTOR (4 downto 0);
op : in STD_LOGIC_VECTOR (1 downto 0);
op3 : in STD_LOGIC_VECTOR (5 downto 0);
cwpout : out STD_LOGIC;
rs1out : out STD_LOGIC_VECTOR (5 downto 0);
rs2out : out STD_LOGIC_VECTOR (5 downto 0);
rdout : out STD_LOGIC_VECTOR (5 downto 0):=(others=>'0'));
end WindowsManager;
architecture Behavioral of WindowsManager is
signal int_rs1, int_rs2, int_rd : integer range 0 to 39 := 0;
begin
process(cwp,rs1,rs2,rd,op,op3)
begin
--guardar instruccion save
if (op = "10" and op3 = "111100") then
cwpout <= '0';
--reset instruction
elsif (op = "10" and op3 = "111101") then
cwpout <= '1';
else cwpout<='0';
end if;
--registros goli rs1
if (rs1 >= "11000" and rs1 <= "11111") then
int_rs1 <= conv_integer(rs1) - conv_integer(cwp) * 16; --input
elsif (rs1 >= "10000" and rs1 <= "10111") then
int_rs1 <= conv_integer(rs1) + conv_integer(cwp) * 16; --local
elsif (rs1 >= "01000" and rs1 <= "01111") then
int_rs1 <= conv_integer(rs1) + conv_integer(cwp) * 16; --output
elsif (rs1 >= "00000" and rs1 <= "00111") then
int_rs1 <= conv_integer(rs1); --global
end if;
--registros goli rs2
if (rs2 >= "11000" and rs2 <= "11111") then
int_rs2 <= conv_integer(rs2) - conv_integer(cwp) * 16; --input
elsif (rs2 >= "10000" and rs2 <= "10111") then
int_rs2 <= conv_integer(rs2) + conv_integer(cwp) * 16; --local
elsif (rs2 >= "01000" and rs2 <= "01111") then
int_rs2 <= conv_integer(rs2) + conv_integer(cwp) * 16; --output
elsif (rs2 >= "00000" and rs2 <= "00111") then
int_rs2 <= conv_integer(rs2); --global
end if;
--registros goli rd
if (rd >= "11000" and rd <= "11111") then
int_rd <= conv_integer(rd) - conv_integer(cwp) * 16; --input
elsif (rd >= "10000" and rd <= "10111") then
int_rd <= conv_integer(rd) + conv_integer(cwp) * 16; --local
elsif (rd >= "01000" and rd <= "01111") then
int_rd <= conv_integer(rd) + conv_integer(cwp) * 16; --output
elsif (rd >= "00000" and rd <= "00111") then
int_rd <= conv_integer(rd); --global
end if;
end process;
rs1out <= conv_std_logic_vector(int_rs1, 6);
rs2out <= conv_std_logic_vector(int_rs2, 6);
rdout <= conv_std_logic_vector(int_rd, 6);
end Behavioral; |
library ieee;
use ieee.std_logic_1164.all;
use work.lib.all;
entity control is
port( op : in std_logic_vector(3 downto 0);
funct : in std_logic_vector(2 downto 0);
RegDst, Jump, Branch, MemRead, MemtoReg, MemWrite, ALUSrc, RegWrite : out std_logic;
ALUOp : out std_logic_vector(2 downto 0)
);
end control;
architecture logic of control is
begin
process(op, funct)
begin
if op = "0000" then
RegDst <= '1';
case funct is
when "010" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "010"; --add
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "110" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "110"; --sub
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "000" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "000"; --and
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "001" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "001"; --or
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "111" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "111"; --slt
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
else
case op is
when "1011" => RegDst <= '1';
Jump <= '0';
Branch <= '0';
MemRead <= '1';
MemtoReg <= '0';
ALUOp <= "010"; --lw
MemWrite <= '0';
ALUSrc <= '1';
RegWrite <= '1';
when "1111" => RegDst <= '0';
Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "010"; --sw
MemWrite <= '1';
ALUSrc <= '1';
RegWrite <= '0';
when "0100" => RegDst <= '0';
Jump <= '0';
Branch <= '1';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "110"; --beq
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when "0010" => RegDst <= '0';
Jump <= '1';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "000"; --j
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
end if;
end process;
end logic; |
library ieee;
use ieee.std_logic_1164.all;
use work.lib.all;
entity control is
port( op : in std_logic_vector(3 downto 0);
funct : in std_logic_vector(2 downto 0);
RegDst, Jump, Branch, MemRead, MemtoReg, MemWrite, ALUSrc, RegWrite : out std_logic;
ALUOp : out std_logic_vector(2 downto 0)
);
end control;
architecture logic of control is
begin
process(op, funct)
begin
if op = "0000" then
RegDst <= '1';
case funct is
when "010" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "010"; --add
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "110" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "110"; --sub
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "000" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "000"; --and
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "001" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "001"; --or
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "111" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "111"; --slt
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
else
case op is
when "1011" => RegDst <= '1';
Jump <= '0';
Branch <= '0';
MemRead <= '1';
MemtoReg <= '0';
ALUOp <= "010"; --lw
MemWrite <= '0';
ALUSrc <= '1';
RegWrite <= '1';
when "1111" => RegDst <= '0';
Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "010"; --sw
MemWrite <= '1';
ALUSrc <= '1';
RegWrite <= '0';
when "0100" => RegDst <= '0';
Jump <= '0';
Branch <= '1';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "110"; --beq
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when "0010" => RegDst <= '0';
Jump <= '1';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "000"; --j
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
end if;
end process;
end logic; |
library ieee;
use ieee.std_logic_1164.all;
use work.lib.all;
entity control is
port( op : in std_logic_vector(3 downto 0);
funct : in std_logic_vector(2 downto 0);
RegDst, Jump, Branch, MemRead, MemtoReg, MemWrite, ALUSrc, RegWrite : out std_logic;
ALUOp : out std_logic_vector(2 downto 0)
);
end control;
architecture logic of control is
begin
process(op, funct)
begin
if op = "0000" then
RegDst <= '1';
case funct is
when "010" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "010"; --add
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "110" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "110"; --sub
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "000" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "000"; --and
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "001" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "001"; --or
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "111" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "111"; --slt
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
else
case op is
when "1011" => RegDst <= '1';
Jump <= '0';
Branch <= '0';
MemRead <= '1';
MemtoReg <= '0';
ALUOp <= "010"; --lw
MemWrite <= '0';
ALUSrc <= '1';
RegWrite <= '1';
when "1111" => RegDst <= '0';
Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "010"; --sw
MemWrite <= '1';
ALUSrc <= '1';
RegWrite <= '0';
when "0100" => RegDst <= '0';
Jump <= '0';
Branch <= '1';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "110"; --beq
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when "0010" => RegDst <= '0';
Jump <= '1';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "000"; --j
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
end if;
end process;
end logic; |
library ieee;
use ieee.std_logic_1164.all;
use work.lib.all;
entity control is
port( op : in std_logic_vector(3 downto 0);
funct : in std_logic_vector(2 downto 0);
RegDst, Jump, Branch, MemRead, MemtoReg, MemWrite, ALUSrc, RegWrite : out std_logic;
ALUOp : out std_logic_vector(2 downto 0)
);
end control;
architecture logic of control is
begin
process(op, funct)
begin
if op = "0000" then
RegDst <= '1';
case funct is
when "010" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "010"; --add
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "110" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "110"; --sub
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "000" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "000"; --and
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "001" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "001"; --or
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when "111" => Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '1';
ALUOp <= "111"; --slt
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '1';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
else
case op is
when "1011" => RegDst <= '1';
Jump <= '0';
Branch <= '0';
MemRead <= '1';
MemtoReg <= '0';
ALUOp <= "010"; --lw
MemWrite <= '0';
ALUSrc <= '1';
RegWrite <= '1';
when "1111" => RegDst <= '0';
Jump <= '0';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "010"; --sw
MemWrite <= '1';
ALUSrc <= '1';
RegWrite <= '0';
when "0100" => RegDst <= '0';
Jump <= '0';
Branch <= '1';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "110"; --beq
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when "0010" => RegDst <= '0';
Jump <= '1';
Branch <= '0';
MemRead <= '0';
MemtoReg <= '0';
ALUOp <= "000"; --j
MemWrite <= '0';
ALUSrc <= '0';
RegWrite <= '0';
when others => RegDst <= 'X';
Jump <= 'X';
Branch <= 'X';
MemRead <= 'X';
MemtoReg <= 'X';
ALUOp <= "XXX"; --others
MemWrite <= 'X';
ALUSrc <= 'X';
RegWrite <= 'X';
end case;
end if;
end process;
end logic; |
-- -------------------------------------------------------------
--
-- Generated Architecture Declaration for rtl of inst_9_e
--
-- Generated
-- by: wig
-- on: Mon Jun 26 08:31:57 2006
-- cmd: /cygdrive/h/work/eclipse/MIX/mix_0.pl ../../generic.xls
--
-- !!! Do not edit this file! Autogenerated by MIX !!!
-- $Author: wig $
-- $Id: inst_9_e-rtl-a.vhd,v 1.5 2006/06/26 08:39:42 wig Exp $
-- $Date: 2006/06/26 08:39:42 $
-- $Log: inst_9_e-rtl-a.vhd,v $
-- Revision 1.5 2006/06/26 08:39:42 wig
-- Update more testcases (up to generic)
--
--
-- Based on Mix Architecture Template built into RCSfile: MixWriter.pm,v
-- Id: MixWriter.pm,v 1.90 2006/06/22 07:13:21 wig Exp
--
-- Generator: mix_0.pl Revision: 1.46 , [email protected]
-- (C) 2003,2005 Micronas GmbH
--
-- --------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
-- No project specific VHDL libraries/arch
--
--
-- Start of Generated Architecture rtl of inst_9_e
--
architecture rtl of inst_9_e is
--
-- Generated Constant Declarations
--
--
-- Generated Components
--
--
-- Generated Signal List
--
--
-- End of Generated Signal List
--
begin
--
-- Generated Concurrent Statements
--
--
-- Generated Signal Assignments
--
--
-- Generated Instances and Port Mappings
--
end rtl;
--
--!End of Architecture/s
-- --------------------------------------------------------------
|
--------------------------------------------------------------------------------
-- This file is owned and controlled by Xilinx and must be used solely --
-- for design, simulation, implementation and creation of design files --
-- limited to Xilinx devices or technologies. Use with non-Xilinx --
-- devices or technologies is expressly prohibited and immediately --
-- terminates your license. --
-- --
-- XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" SOLELY --
-- FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR XILINX DEVICES. BY --
-- PROVIDING THIS DESIGN, CODE, OR INFORMATION AS ONE POSSIBLE --
-- IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD, XILINX IS --
-- MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE FROM ANY --
-- CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING ANY --
-- RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY --
-- DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE --
-- IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR --
-- REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF --
-- INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A --
-- PARTICULAR PURPOSE. --
-- --
-- Xilinx products are not intended for use in life support appliances, --
-- devices, or systems. Use in such applications are expressly --
-- prohibited. --
-- --
-- (c) Copyright 1995-2014 Xilinx, Inc. --
-- All rights reserved. --
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- You must compile the wrapper file fr_cmplr_v6_3_b1697e0c92d2e32a.vhd when simulating
-- the core, fr_cmplr_v6_3_b1697e0c92d2e32a. When compiling the wrapper file, be sure to
-- reference the XilinxCoreLib VHDL simulation library. For detailed
-- instructions, please refer to the "CORE Generator Help".
-- The synthesis directives "translate_off/translate_on" specified
-- below are supported by Xilinx, Mentor Graphics and Synplicity
-- synthesis tools. Ensure they are correct for your synthesis tool(s).
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
-- synthesis translate_off
LIBRARY XilinxCoreLib;
-- synthesis translate_on
ENTITY fr_cmplr_v6_3_b1697e0c92d2e32a IS
PORT (
aclk : IN STD_LOGIC;
aclken : IN STD_LOGIC;
s_axis_data_tvalid : IN STD_LOGIC;
s_axis_data_tready : OUT STD_LOGIC;
s_axis_data_tuser : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axis_data_tdata : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
m_axis_data_tvalid : OUT STD_LOGIC;
m_axis_data_tuser : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
m_axis_data_tdata : OUT STD_LOGIC_VECTOR(31 DOWNTO 0);
event_s_data_chanid_incorrect : OUT STD_LOGIC
);
END fr_cmplr_v6_3_b1697e0c92d2e32a;
ARCHITECTURE fr_cmplr_v6_3_b1697e0c92d2e32a_a OF fr_cmplr_v6_3_b1697e0c92d2e32a IS
-- synthesis translate_off
COMPONENT wrapped_fr_cmplr_v6_3_b1697e0c92d2e32a
PORT (
aclk : IN STD_LOGIC;
aclken : IN STD_LOGIC;
s_axis_data_tvalid : IN STD_LOGIC;
s_axis_data_tready : OUT STD_LOGIC;
s_axis_data_tuser : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axis_data_tdata : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
m_axis_data_tvalid : OUT STD_LOGIC;
m_axis_data_tuser : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
m_axis_data_tdata : OUT STD_LOGIC_VECTOR(31 DOWNTO 0);
event_s_data_chanid_incorrect : OUT STD_LOGIC
);
END COMPONENT;
-- Configuration specification
FOR ALL : wrapped_fr_cmplr_v6_3_b1697e0c92d2e32a USE ENTITY XilinxCoreLib.fir_compiler_v6_3(behavioral)
GENERIC MAP (
c_accum_op_path_widths => "44",
c_accum_path_widths => "44",
c_channel_pattern => "fixed",
c_coef_file => "fr_cmplr_v6_3_b1697e0c92d2e32a.mif",
c_coef_file_lines => 240,
c_coef_mem_packing => 0,
c_coef_memtype => 1,
c_coef_path_sign => "0",
c_coef_path_src => "0",
c_coef_path_widths => "16",
c_coef_reload => 0,
c_coef_width => 16,
c_col_config => "1",
c_col_mode => 1,
c_col_pipe_len => 4,
c_component_name => "fr_cmplr_v6_3_b1697e0c92d2e32a",
c_config_packet_size => 0,
c_config_sync_mode => 0,
c_config_tdata_width => 1,
c_data_has_tlast => 0,
c_data_mem_packing => 0,
c_data_memtype => 1,
c_data_path_sign => "0",
c_data_path_src => "0",
c_data_path_widths => "25",
c_data_width => 25,
c_datapath_memtype => 2,
c_decim_rate => 10,
c_ext_mult_cnfg => "none",
c_filter_type => 1,
c_filts_packed => 0,
c_has_aclken => 1,
c_has_aresetn => 0,
c_has_config_channel => 0,
c_input_rate => 5600000,
c_interp_rate => 1,
c_ipbuff_memtype => 0,
c_latency => 31,
c_m_data_has_tready => 0,
c_m_data_has_tuser => 1,
c_m_data_tdata_width => 32,
c_m_data_tuser_width => 2,
c_mem_arrangement => 0,
c_num_channels => 4,
c_num_filts => 1,
c_num_madds => 1,
c_num_reload_slots => 1,
c_num_taps => 240,
c_opbuff_memtype => 0,
c_opt_madds => "none",
c_optimization => 0,
c_output_path_widths => "26",
c_output_rate => 56000000,
c_output_width => 26,
c_oversampling_rate => 24,
c_reload_tdata_width => 1,
c_round_mode => 4,
c_s_data_has_fifo => 0,
c_s_data_has_tuser => 1,
c_s_data_tdata_width => 32,
c_s_data_tuser_width => 2,
c_symmetry => 0,
c_xdevicefamily => "artix7",
c_zero_packing_factor => 1
);
-- synthesis translate_on
BEGIN
-- synthesis translate_off
U0 : wrapped_fr_cmplr_v6_3_b1697e0c92d2e32a
PORT MAP (
aclk => aclk,
aclken => aclken,
s_axis_data_tvalid => s_axis_data_tvalid,
s_axis_data_tready => s_axis_data_tready,
s_axis_data_tuser => s_axis_data_tuser,
s_axis_data_tdata => s_axis_data_tdata,
m_axis_data_tvalid => m_axis_data_tvalid,
m_axis_data_tuser => m_axis_data_tuser,
m_axis_data_tdata => m_axis_data_tdata,
event_s_data_chanid_incorrect => event_s_data_chanid_incorrect
);
-- synthesis translate_on
END fr_cmplr_v6_3_b1697e0c92d2e32a_a;
|
-------------------------------------------------------------------------------
-- Title : UART testbench
-- Project : fpga_logic_analyzer
-------------------------------------------------------------------------------
-- File : UART_tb.vhd
-- Created : 2016-02-22
-- Last update: 2016-03-28
-- Standard : VHDL'08
-------------------------------------------------------------------------------
-- Description: This is the UART testbench
-------------------------------------------------------------------------------
-- Copyright (c) 2016 Ashton Johnson, Paul Henny, Ian Swepston, David Hurt
-------------------------------------------------------------------------------
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
-- You should have received a copy of the GNU General Public License along
-- with this program; if not, write to the Free Software Foundation, Inc.,
-- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-------------------------------------------------------------------------------
-- Revisions :
-- Date Version Author Description
-- 2016-03-16 1.0 ian Created
-------------------------------------------------------------------------------
use WORK.all;
library ieee;
use IEEE.std_logic_1164.all;
entity UART_tb is
end entity;
library ieee;
use IEEE.std_logic_1164.all;
architecture test of UART_tb is
signal clk : std_logic := '1'; -- clock
signal rst : std_logic; -- reset logic
signal rx_get_more_data : std_logic; -- stop bit found for stream in
signal rx_data_ready : std_logic; -- stream out ready
signal rx : std_logic; -- receive line
signal data_in : std_logic_vector(7 downto 0) := (others => '0'); -- data to be transmitted
signal tx_data_ready : std_logic; -- stream out stop bit sent
signal tx_data_sent : std_logic; -- ready for rx
signal tx : std_logic := '1'; -- transmit line
signal data_out : std_logic_vector(7 downto 0) := (others => '0');
signal receive_data : std_logic_vector(7 downto 0);
signal baud_clock : std_logic := '1';
signal baud_counter : integer := 0;
constant baud_rate : integer := 10_000;
constant clock_freq : integer := 10_000_000;
constant baud_total : integer := (clock_freq/baud_rate)/2;
begin
u1 : entity work.uart_comms
generic map (clock_freq => clock_freq, baud_rate => baud_rate)
port map (
clk => clk,
rst => rst,
rx_get_more_data => rx_get_more_data,
rx_data_ready => rx_data_ready,
rx => rx,
data_in => data_in,
tx_data_ready => tx_data_ready,
tx_data_sent => tx_data_sent,
tx => tx,
data_out => data_out);
process (clk)
begin
clk <= not clk after 50 ns; -- 10 MHz clock
end process;
baud_clocking : process (clk)
begin
if(clk = '1' and clk'event) then
if (baud_counter < baud_total-1) then
baud_counter <= baud_counter + 1;
else
baud_counter <= 0;
baud_clock <= not baud_clock;
end if;
end if;
end process baud_clocking;
process
begin
rx <= '1';
rst <= '0';
wait for 10 ns;
receive_data <= "10011100";
wait until rising_edge(baud_clock);
rx_get_more_data <= '0';
wait until rising_edge(baud_clock);
rx <= '1'; -- nothing
wait until rising_edge(baud_clock);
rx <= '0'; -- stb
wait until rising_edge(baud_clock);
rx <= receive_data(0);
wait until rising_edge(baud_clock);
rx <= receive_data(1);
wait until rising_edge(baud_clock);
rx <= receive_data(2);
wait until rising_edge(baud_clock);
rx <= receive_data(3);
wait until rising_edge(baud_clock);
rx <= receive_data(4);
wait until rising_edge(baud_clock);
rx <= receive_data(5);
wait until rising_edge(baud_clock);
rx <= receive_data(6);
wait until rising_edge(baud_clock);
rx <= receive_data(7);
wait until rising_edge(baud_clock);
rx <= '1'; -- end
assert data_out=receive_data report "data out does not match UART data in" severity failure;
wait for 100 us;
wait until rising_edge(baud_clock);
rx_get_more_data <= '1';
end process;
process
begin
tx_data_ready <= '0';
wait until rising_edge(baud_clock);
wait until rising_edge(baud_clock);
wait until rising_edge(baud_clock);
wait until rising_edge(baud_clock);
data_in <= "10100111";
tx_data_ready <= '1';
wait for 100 ms;
end process;
end test;
|
-------------------------------------------------------------------------------
--
-- Title : local_link_source.vhd - part of the Groucher simulation environment
--
-- Description : This code models the behavior of a local link source device
-- to drive a Grouch module with optional status and length interfaces
--
-- Files: reads from a file data and control inputs
-- if a line starts with capital W then the following number if interpreted
-- as an integer, and the program waits for this integer * cycles
-- if a line starts with a captial D then the rest is interpreted as follows:
-- data bus '' ctl signals( * - DONE - EMPTY -ALMOST)
-- the bit size of the values must be at least the size of the bus rounded to the next 4
-- and is always interpreted as hex.
-- Organization is MSB to LSB
-- length and status are optional
-- if their widths (generics S_WIDTH and L_WIDTH) are set to 0, then
-- we won't parse for them in the file
-- Interface: the processing starts after rst de-asserts
-- drives a standard tx interface (local link + len + sts)
-- Parameters: data width
-- bpr_sensitive
-- pkt_filename
--
-- ----------------------------------------------------------------------------
-- DONE is ignored....
-- DONE is ignored....
-- ----------------------------------------------------------------------------
-- Changelog:
-- 2 Control Flow Bugs fixed.
LIBRARY IEEE;
USE IEEE.std_logic_1164.ALL;
USE IEEE.std_logic_arith.ALL;
USE IEEE.std_logic_unsigned.ALL;
USE IEEE.STD_LOGIC_TEXTIO.all;
LIBRARY STD;
USE STD.TEXTIO.ALL;
entity kvs_tbDriverHDLNode is
generic (
D_WIDTH : integer := 64;
BPR_SENSITIVE : Boolean := true; -- decides whether we react to backpressure or not
--PKT_FILENAME : string := "/home/kimonk/vc709sim/pkt.in.2.txt"
PKT_FILENAME : string := "pkt.in.txt"
);
port (
clk : in std_logic;
rst : in std_logic;
udp_out_ready : in std_logic;
udp_out_valid : out std_logic;
udp_out_keep : out std_logic_vector(7 downto 0);
udp_out_user : out std_logic_vector(111 downto 0);
udp_out_last : out std_logic;
udp_out_data : out std_logic_vector (63 downto 0)
);
end kvs_tbDriverHDLNode;
architecture rtl of kvs_tbDriverHDLNode is
-- read width from file- roudns each value up to the next multiple of 4
constant FD_WIDTH : integer := ((D_WIDTH-1) / 4)*4 + 4;
--signal item_consumed : std_logic;
begin
read_file_p : process
FILE data_file : TEXT OPEN READ_MODE IS PKT_FILENAME;
variable c : character;
variable wait_period : integer;
variable l : line;
variable read_dat : std_logic_vector(63 downto 0);
variable read_keep : std_logic_vector(7 downto 0);
variable read_ctl : std_logic_vector(3 downto 0);
variable item_consumed : std_logic;
variable cntCorrection : integer;
variable firstRun : integer;
--variable read_ctl_buf : std_logic_Vector(3 downto 0) := (others => '1');
begin
if (D_WIDTH=0) then
assert false report "D_WIDTH and R_WIDTH must be greater than 0" severity failure;
end if;
-- assign defaults for rest
udp_out_valid <= '0';
udp_out_last <= '0';
udp_out_data <=(others => '0');
udp_out_keep <=(others => '0');
udp_out_user <=(others => '0');
item_consumed := '0';
firstRun := 0;
wait_period := 1;
wait until CLK'event and CLK='1';
while (not endfile(data_file)) loop
READLINE(data_file, l);
READ(l, c);
case c is
when 'W' => -- wait
READ(l,wait_period);
cntCorrection := 1;
for i in 0 to wait_period -1 loop
udp_out_valid <= '0';
wait until CLK'event and CLK='1';
end loop;
when others =>
-- parse data line
HREAD(l,read_dat);
READ(l,c);--blank
HREAD(l,read_keep);
READ(l,c);--blank
HREAD(l,read_ctl);
udp_out_data <= read_dat;
udp_out_keep <= read_keep;
if (read_ctl = 1) then
udp_out_last <= '1';
else
udp_out_last <= '0';
end if;
udp_out_valid <= '1';
wait until udp_out_ready = '1' and CLK'event and CLK='1';
end case;
--wait until CLK'event and CLK='1';
end loop;
wait until CLK'event and CLK='1';
-- following delay is to ensure the last bit of data
-- is through the simulation
wait for 1000 * 1000 ns;
-- then terminate the simulation
--if (endfile(data_file)) then
-- assert false report "End of simulation." severity failure;
--end if;
end process;
end rtl; |
LIBRARY ieee;
USE ieee.std_logic_1164.all;
ENTITY rsc IS
PORT
(
r : IN std_logic;
s : IN std_logic;
c : IN std_logic;
q : OUT std_logic;
qi : OUT std_logic
);
END rsc;
ARCHITECTURE behavior OF rsc IS
COMPONENT rs IS
PORT
(
r : IN std_logic;
s : IN std_logic;
q : OUT std_logic;
qi : OUT std_logic
);
END COMPONENT;
SIGNAL a, b : std_logic;
BEGIN
a <= s and c;
b <= r and c;
flipflop : rs PORT MAP(a, b, q, qi);
END behavior; |
------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2011, Aeroflex Gaisler AB - all rights reserved.
--
-- ANY USE OR REDISTRIBUTION IN PART OR IN WHOLE MUST BE HANDLED IN
-- ACCORDANCE WITH THE GAISLER LICENSE AGREEMENT AND MUST BE APPROVED
-- IN ADVANCE IN WRITING.
------------------------------------------------------------------------------
--
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
--library synplify;
entity spictrl_unisim is
generic (
slvselen : integer range 0 to 1 := 0;
slvselsz : integer range 1 to 32 := 1);
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector((slvselsz-1) downto 0));
end spictrl_unisim;
architecture rtl of spictrl_unisim is
-- Combination 0, 32 slave selects
component spictrl_unisim_comb0
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector(31 downto 0));
end component;
-- Combination 1, 32 disabled slave selects
component spictrl_unisim_comb1
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector(31 downto 0));
end component;
begin
slvselact : if slvselen /= 0 generate
spic0 : spictrl_unisim_comb0
port map (
rstn => rstn,
clk => clk,
-- APB signals
apbi_psel => apbi_psel,
apbi_penable => apbi_penable,
apbi_paddr => apbi_paddr,
apbi_pwrite => apbi_pwrite,
apbi_pwdata => apbi_pwdata,
apbi_testen => apbi_testen,
apbi_testrst => apbi_testrst,
apbi_scanen => apbi_scanen,
apbi_testoen => apbi_testoen,
apbo_prdata => apbo_prdata,
apbo_pirq => apbo_pirq,
-- SPI signals
spii_miso => spii_miso,
spii_mosi => spii_mosi,
spii_sck => spii_sck,
spii_spisel => spii_spisel,
spii_astart => spii_astart,
spii_cstart => spii_cstart,
spio_miso => spio_miso,
spio_misooen => spio_misooen,
spio_mosi => spio_mosi,
spio_mosioen => spio_mosioen,
spio_sck => spio_sck,
spio_sckoen => spio_sckoen,
spio_enable => spio_enable,
spio_astart => spio_astart,
spio_aready => spio_aready,
slvsel => slvsel);
end generate;
noslvsel : if slvselen = 0 generate
spic0 : spictrl_unisim_comb1
port map (
rstn => rstn,
clk => clk,
-- APB signals
apbi_psel => apbi_psel,
apbi_penable => apbi_penable,
apbi_paddr => apbi_paddr,
apbi_pwrite => apbi_pwrite,
apbi_pwdata => apbi_pwdata,
apbi_testen => apbi_testen,
apbi_testrst => apbi_testrst,
apbi_scanen => apbi_scanen,
apbi_testoen => apbi_testoen,
apbo_prdata => apbo_prdata,
apbo_pirq => apbo_pirq,
-- SPI signals
spii_miso => spii_miso,
spii_mosi => spii_mosi,
spii_sck => spii_sck,
spii_spisel => spii_spisel,
spii_astart => spii_astart,
spii_cstart => spii_cstart,
spio_miso => spio_miso,
spio_misooen => spio_misooen,
spio_mosi => spio_mosi,
spio_mosioen => spio_mosioen,
spio_sck => spio_sck,
spio_sckoen => spio_sckoen,
spio_enable => spio_enable,
spio_astart => spio_astart,
spio_aready => spio_aready,
slvsel => slvsel);
end generate;
end rtl;
|
------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2011, Aeroflex Gaisler AB - all rights reserved.
--
-- ANY USE OR REDISTRIBUTION IN PART OR IN WHOLE MUST BE HANDLED IN
-- ACCORDANCE WITH THE GAISLER LICENSE AGREEMENT AND MUST BE APPROVED
-- IN ADVANCE IN WRITING.
------------------------------------------------------------------------------
--
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
--library synplify;
entity spictrl_unisim is
generic (
slvselen : integer range 0 to 1 := 0;
slvselsz : integer range 1 to 32 := 1);
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector((slvselsz-1) downto 0));
end spictrl_unisim;
architecture rtl of spictrl_unisim is
-- Combination 0, 32 slave selects
component spictrl_unisim_comb0
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector(31 downto 0));
end component;
-- Combination 1, 32 disabled slave selects
component spictrl_unisim_comb1
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector(31 downto 0));
end component;
begin
slvselact : if slvselen /= 0 generate
spic0 : spictrl_unisim_comb0
port map (
rstn => rstn,
clk => clk,
-- APB signals
apbi_psel => apbi_psel,
apbi_penable => apbi_penable,
apbi_paddr => apbi_paddr,
apbi_pwrite => apbi_pwrite,
apbi_pwdata => apbi_pwdata,
apbi_testen => apbi_testen,
apbi_testrst => apbi_testrst,
apbi_scanen => apbi_scanen,
apbi_testoen => apbi_testoen,
apbo_prdata => apbo_prdata,
apbo_pirq => apbo_pirq,
-- SPI signals
spii_miso => spii_miso,
spii_mosi => spii_mosi,
spii_sck => spii_sck,
spii_spisel => spii_spisel,
spii_astart => spii_astart,
spii_cstart => spii_cstart,
spio_miso => spio_miso,
spio_misooen => spio_misooen,
spio_mosi => spio_mosi,
spio_mosioen => spio_mosioen,
spio_sck => spio_sck,
spio_sckoen => spio_sckoen,
spio_enable => spio_enable,
spio_astart => spio_astart,
spio_aready => spio_aready,
slvsel => slvsel);
end generate;
noslvsel : if slvselen = 0 generate
spic0 : spictrl_unisim_comb1
port map (
rstn => rstn,
clk => clk,
-- APB signals
apbi_psel => apbi_psel,
apbi_penable => apbi_penable,
apbi_paddr => apbi_paddr,
apbi_pwrite => apbi_pwrite,
apbi_pwdata => apbi_pwdata,
apbi_testen => apbi_testen,
apbi_testrst => apbi_testrst,
apbi_scanen => apbi_scanen,
apbi_testoen => apbi_testoen,
apbo_prdata => apbo_prdata,
apbo_pirq => apbo_pirq,
-- SPI signals
spii_miso => spii_miso,
spii_mosi => spii_mosi,
spii_sck => spii_sck,
spii_spisel => spii_spisel,
spii_astart => spii_astart,
spii_cstart => spii_cstart,
spio_miso => spio_miso,
spio_misooen => spio_misooen,
spio_mosi => spio_mosi,
spio_mosioen => spio_mosioen,
spio_sck => spio_sck,
spio_sckoen => spio_sckoen,
spio_enable => spio_enable,
spio_astart => spio_astart,
spio_aready => spio_aready,
slvsel => slvsel);
end generate;
end rtl;
|
------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2011, Aeroflex Gaisler AB - all rights reserved.
--
-- ANY USE OR REDISTRIBUTION IN PART OR IN WHOLE MUST BE HANDLED IN
-- ACCORDANCE WITH THE GAISLER LICENSE AGREEMENT AND MUST BE APPROVED
-- IN ADVANCE IN WRITING.
------------------------------------------------------------------------------
--
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
--library synplify;
entity spictrl_unisim is
generic (
slvselen : integer range 0 to 1 := 0;
slvselsz : integer range 1 to 32 := 1);
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector((slvselsz-1) downto 0));
end spictrl_unisim;
architecture rtl of spictrl_unisim is
-- Combination 0, 32 slave selects
component spictrl_unisim_comb0
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector(31 downto 0));
end component;
-- Combination 1, 32 disabled slave selects
component spictrl_unisim_comb1
port (
rstn : in std_ulogic;
clk : in std_ulogic;
-- APB signals
apbi_psel : in std_ulogic;
apbi_penable : in std_ulogic;
apbi_paddr : in std_logic_vector(31 downto 0);
apbi_pwrite : in std_ulogic;
apbi_pwdata : in std_logic_vector(31 downto 0);
apbi_testen : in std_ulogic;
apbi_testrst : in std_ulogic;
apbi_scanen : in std_ulogic;
apbi_testoen : in std_ulogic;
apbo_prdata : out std_logic_vector(31 downto 0);
apbo_pirq : out std_ulogic;
-- SPI signals
spii_miso : in std_ulogic;
spii_mosi : in std_ulogic;
spii_sck : in std_ulogic;
spii_spisel : in std_ulogic;
spii_astart : in std_ulogic;
spii_cstart : in std_ulogic;
spio_miso : out std_ulogic;
spio_misooen : out std_ulogic;
spio_mosi : out std_ulogic;
spio_mosioen : out std_ulogic;
spio_sck : out std_ulogic;
spio_sckoen : out std_ulogic;
spio_enable : out std_ulogic;
spio_astart : out std_ulogic;
spio_aready : out std_ulogic;
slvsel : out std_logic_vector(31 downto 0));
end component;
begin
slvselact : if slvselen /= 0 generate
spic0 : spictrl_unisim_comb0
port map (
rstn => rstn,
clk => clk,
-- APB signals
apbi_psel => apbi_psel,
apbi_penable => apbi_penable,
apbi_paddr => apbi_paddr,
apbi_pwrite => apbi_pwrite,
apbi_pwdata => apbi_pwdata,
apbi_testen => apbi_testen,
apbi_testrst => apbi_testrst,
apbi_scanen => apbi_scanen,
apbi_testoen => apbi_testoen,
apbo_prdata => apbo_prdata,
apbo_pirq => apbo_pirq,
-- SPI signals
spii_miso => spii_miso,
spii_mosi => spii_mosi,
spii_sck => spii_sck,
spii_spisel => spii_spisel,
spii_astart => spii_astart,
spii_cstart => spii_cstart,
spio_miso => spio_miso,
spio_misooen => spio_misooen,
spio_mosi => spio_mosi,
spio_mosioen => spio_mosioen,
spio_sck => spio_sck,
spio_sckoen => spio_sckoen,
spio_enable => spio_enable,
spio_astart => spio_astart,
spio_aready => spio_aready,
slvsel => slvsel);
end generate;
noslvsel : if slvselen = 0 generate
spic0 : spictrl_unisim_comb1
port map (
rstn => rstn,
clk => clk,
-- APB signals
apbi_psel => apbi_psel,
apbi_penable => apbi_penable,
apbi_paddr => apbi_paddr,
apbi_pwrite => apbi_pwrite,
apbi_pwdata => apbi_pwdata,
apbi_testen => apbi_testen,
apbi_testrst => apbi_testrst,
apbi_scanen => apbi_scanen,
apbi_testoen => apbi_testoen,
apbo_prdata => apbo_prdata,
apbo_pirq => apbo_pirq,
-- SPI signals
spii_miso => spii_miso,
spii_mosi => spii_mosi,
spii_sck => spii_sck,
spii_spisel => spii_spisel,
spii_astart => spii_astart,
spii_cstart => spii_cstart,
spio_miso => spio_miso,
spio_misooen => spio_misooen,
spio_mosi => spio_mosi,
spio_mosioen => spio_mosioen,
spio_sck => spio_sck,
spio_sckoen => spio_sckoen,
spio_enable => spio_enable,
spio_astart => spio_astart,
spio_aready => spio_aready,
slvsel => slvsel);
end generate;
end rtl;
|
----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 03.07.2017 10:01:38
-- Design Name:
-- Module Name: tb_complex_abs_esaustivo - Behavioral
-- Project Name:
-- Target Devices:
-- Tool Versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
use IEEE.NUMERIC_STD.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use ieee.math_real.all;
use ieee.numeric_std.all;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;
-- Uncomment the following library declaration if instantiating
-- any Xilinx leaf cells in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
entity tb_complex_abs_esaustivo is
-- Port ( );
end tb_complex_abs_esaustivo;
architecture Behavioral of tb_complex_abs_esaustivo is
component complex_abs is
Generic ( complex_width : natural := 32 ); --! Parallelismo in bit del numero complesso (inteso come somma di parte reale e immaginaria)
Port ( clock : in STD_LOGIC; --! Segnale di temporizzazione
reset_n : in STD_LOGIC; --! Segnale di reset 0-attivo
enable : in STD_LOGIC;
complex_value : in STD_LOGIC_VECTOR (complex_width-1 downto 0); --! Numero complesso di cui calcolare il modulo
abs_value : out STD_LOGIC_VECTOR (complex_width-1 downto 0); --! Modulo del numero complesso
done : out STD_LOGIC); --! Segnale di terminazione delle operazioni
end component complex_abs;
constant complex_width : natural:= 32;
constant clock_period : time := 10 ns;
constant num_cicli : natural := 10000;
signal clock : std_logic := '0';
signal reset_n : std_logic := '0';
signal enable : std_logic := '0';
signal done : std_logic := '0';
signal complex_value : std_logic_vector(complex_width-1 downto 0) := (others => '0');
signal abs_value : std_logic_vector(complex_width-1 downto 0) := (others => '0');
begin
uut: complex_abs
port map (
clock => clock,
reset_n => reset_n,
enable => enable,
complex_value => complex_value,
abs_value => abs_value,
done => done
);
-- Clock process definitions
clock_process :process
begin
clock <= '0';
wait for clock_period/2;
clock <= '1';
wait for clock_period/2;
end process;
-- Stimulus process
stim_proc: process
variable valore_assoluto : std_logic_vector(complex_width-1 downto 0) := (others => '0');
variable complex_value_variable : integer := -(2 ** ((complex_width/2)-1));
begin
-- hold reset state for 100 ns.
reset_n<='0';
complex_value <= (complex_width-1 => '1', (complex_width/2)-1 => '1', others => '0');
wait for 95 ns;
reset_n<='1';
enable <= '1';
for i in 0 to num_cicli-1 loop
--sommo in esadecimale 0x00010001 ad ogni iterazione al valore di cui calcolo il valore assoluto
complex_value <= complex_value + 65537;
complex_value_variable := complex_value_variable + 1;
valore_assoluto := std_logic_vector(to_signed(complex_value_variable * complex_value_variable * 2, 32));
wait until done = '1';
assert(valore_assoluto = abs_value) report "Test Fallito valore assoluto trovato errato!";
wait for clock_period;
end loop;
wait;
end process;
end Behavioral;
|
library ieee;
library work;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity pwr_sequencer_tb is
generic
(
LEVELS_N : natural := 3;
TEST_D : natural := 10000
);
end entity;
architecture rtl of pwr_sequencer_tb is
-- Main clock frequency 100 MHz
constant CLK_PERIOD : time := 1 sec / 10e7;
signal clk : std_logic := '0';
signal reset : std_logic;
signal main_pwr_en : std_logic;
signal main_pwr_fail : std_logic;
signal start : std_logic;
signal fail : std_logic_vector(LEVELS_N - 1 downto 0);
signal enable : std_logic_vector(LEVELS_N - 1 downto 0);
begin
reset <= '1', '0' after 500 ns;
clk_gen: process(clk)
begin
clk <= not clk after CLK_PERIOD / 2;
end process;
DUT_inst: entity work.pwr_sequencer(rtl)
generic map
(
LEVELS_N => LEVELS_N
)
port map
(
clk => clk,
reset => reset,
start_in => start,
fail_in => fail,
en_out => enable,
main_pwr_en_out => main_pwr_en,
main_pwr_fail_out => main_pwr_fail
);
fail_gen: process(clk, reset)
type state_t is (idle, delay, power_on, cause_fail);
variable state : state_t;
variable timer : natural;
variable cur_level : natural;
begin
if reset = '1' then
state := idle;
timer := 0;
fail <= (others => '1');
cur_level := 0;
start <= '0';
elsif rising_edge(clk) then
if state = idle then
start <= '1';
for i in 0 to enable'high loop
if enable(i) = '1' then
cur_level := i;
state := delay;
end if;
end loop;
elsif state = delay then
timer := timer + 1;
if timer > TEST_D then
fail(cur_level) <= '0';
timer := 0;
if cur_level = enable'high then
state := power_on;
else
state := idle;
end if;
end if;
elsif state = power_on then
timer := timer + 1;
-- After succesfull sequencing cause a failure
if timer > TEST_D then
fail(0) <= '1';
timer := 0;
state := cause_fail;
end if;
elsif state = cause_fail then
timer := timer + 1;
start <= '0';
-- After succesfull power failure, restart
if timer > TEST_D then
start <= '1';
fail <= (others => '1');
timer := 0;
state := idle;
end if;
end if;
end if;
end process;
end;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity dacad5668Device_v1_0 is
generic (
-- Users to add parameters here
base_clk : INTEGER := 125000000;
sclk_frequency : INTEGER := 8000000;
unique_id : STD_LOGIC_VECTOR(31 DOWNTO 0) := (OTHERS => '0');
internal_reference : STD_LOGIC := '1';
-- User parameters ends
-- Do not modify the parameters beyond this line
-- Parameters of Axi Slave Bus Interface S00_AXI
C_S00_AXI_ID_WIDTH : integer := 1;
C_S00_AXI_DATA_WIDTH : integer := 32;
C_S00_AXI_ADDR_WIDTH : integer := 12
);
port (
-- Users to add ports here
osl_LDAC_n : OUT STD_LOGIC;
osl_CLR_n : OUT STD_LOGIC;
osl_sclk : OUT STD_LOGIC;
osl_ss : OUT STD_LOGIC;
osl_mosi : OUT STD_LOGIC;
-- User ports ends
-- Do not modify the ports beyond this line
-- Ports of Axi Slave Bus Interface S00_AXI
s00_axi_aclk : in std_logic;
s00_axi_aresetn : in std_logic;
s00_axi_awid : in std_logic_vector(C_S00_AXI_ID_WIDTH-1 downto 0);
s00_axi_awaddr : in std_logic_vector(C_S00_AXI_ADDR_WIDTH-1 downto 0);
s00_axi_awlen : in std_logic_vector(7 downto 0);
s00_axi_awsize : in std_logic_vector(2 downto 0);
s00_axi_awburst : in std_logic_vector(1 downto 0);
s00_axi_awvalid : in std_logic;
s00_axi_awready : out std_logic;
s00_axi_wdata : in std_logic_vector(C_S00_AXI_DATA_WIDTH-1 downto 0);
s00_axi_wstrb : in std_logic_vector((C_S00_AXI_DATA_WIDTH/8)-1 downto 0);
s00_axi_wlast : in std_logic;
s00_axi_wvalid : in std_logic;
s00_axi_wready : out std_logic;
s00_axi_bid : out std_logic_vector(C_S00_AXI_ID_WIDTH-1 downto 0);
s00_axi_bresp : out std_logic_vector(1 downto 0);
s00_axi_bvalid : out std_logic;
s00_axi_bready : in std_logic;
s00_axi_arid : in std_logic_vector(C_S00_AXI_ID_WIDTH-1 downto 0);
s00_axi_araddr : in std_logic_vector(C_S00_AXI_ADDR_WIDTH-1 downto 0);
s00_axi_arlen : in std_logic_vector(7 downto 0);
s00_axi_arsize : in std_logic_vector(2 downto 0);
s00_axi_arburst : in std_logic_vector(1 downto 0);
s00_axi_arvalid : in std_logic;
s00_axi_arready : out std_logic;
s00_axi_rid : out std_logic_vector(C_S00_AXI_ID_WIDTH-1 downto 0);
s00_axi_rdata : out std_logic_vector(C_S00_AXI_DATA_WIDTH-1 downto 0);
s00_axi_rresp : out std_logic_vector(1 downto 0);
s00_axi_rlast : out std_logic;
s00_axi_rvalid : out std_logic;
s00_axi_rready : in std_logic
);
end dacad5668Device_v1_0;
architecture arch_imp of dacad5668Device_v1_0 is
-- component declaration
component dacad5668Device_v1_0_S00_AXI is
generic (
base_clk : INTEGER := 125000000;
sclk_frequency : INTEGER := 8000000;
unique_id : STD_LOGIC_VECTOR(31 DOWNTO 0) := (OTHERS => '0');
internal_reference : STD_LOGIC := '1';
C_S_AXI_ID_WIDTH : integer := 1;
C_S_AXI_DATA_WIDTH : integer := 32;
C_S_AXI_ADDR_WIDTH : integer := 12
);
port (
osl_LDAC_n : OUT STD_LOGIC;
osl_CLR_n : OUT STD_LOGIC;
osl_sclk : OUT STD_LOGIC;
osl_ss : OUT STD_LOGIC;
osl_mosi : OUT STD_LOGIC;
S_AXI_ACLK : in std_logic;
S_AXI_ARESETN : in std_logic;
S_AXI_AWID : in std_logic_vector(C_S_AXI_ID_WIDTH-1 downto 0);
S_AXI_AWADDR : in std_logic_vector(C_S_AXI_ADDR_WIDTH-1 downto 0);
S_AXI_AWLEN : in std_logic_vector(7 downto 0);
S_AXI_AWSIZE : in std_logic_vector(2 downto 0);
S_AXI_AWBURST : in std_logic_vector(1 downto 0);
S_AXI_AWVALID : in std_logic;
S_AXI_AWREADY : out std_logic;
S_AXI_WDATA : in std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
S_AXI_WSTRB : in std_logic_vector((C_S_AXI_DATA_WIDTH/8)-1 downto 0);
S_AXI_WLAST : in std_logic;
S_AXI_WVALID : in std_logic;
S_AXI_WREADY : out std_logic;
S_AXI_BID : out std_logic_vector(C_S_AXI_ID_WIDTH-1 downto 0);
S_AXI_BRESP : out std_logic_vector(1 downto 0);
S_AXI_BVALID : out std_logic;
S_AXI_BREADY : in std_logic;
S_AXI_ARID : in std_logic_vector(C_S_AXI_ID_WIDTH-1 downto 0);
S_AXI_ARADDR : in std_logic_vector(C_S_AXI_ADDR_WIDTH-1 downto 0);
S_AXI_ARLEN : in std_logic_vector(7 downto 0);
S_AXI_ARSIZE : in std_logic_vector(2 downto 0);
S_AXI_ARBURST : in std_logic_vector(1 downto 0);
S_AXI_ARVALID : in std_logic;
S_AXI_ARREADY : out std_logic;
S_AXI_RID : out std_logic_vector(C_S_AXI_ID_WIDTH-1 downto 0);
S_AXI_RDATA : out std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
S_AXI_RRESP : out std_logic_vector(1 downto 0);
S_AXI_RLAST : out std_logic;
S_AXI_RVALID : out std_logic;
S_AXI_RREADY : in std_logic
);
end component dacad5668Device_v1_0_S00_AXI;
begin
-- Instantiation of Axi Bus Interface S00_AXI
dacad5668Device_v1_0_S00_AXI_inst : dacad5668Device_v1_0_S00_AXI
generic map (
base_clk => base_clk,
sclk_frequency => sclk_frequency,
unique_id => unique_id,
internal_reference => internal_reference,
C_S_AXI_ID_WIDTH => C_S00_AXI_ID_WIDTH,
C_S_AXI_DATA_WIDTH => C_S00_AXI_DATA_WIDTH,
C_S_AXI_ADDR_WIDTH => C_S00_AXI_ADDR_WIDTH
)
port map (
osl_LDAC_n => osl_LDAC_n,
osl_CLR_n => osl_CLR_n,
osl_sclk => osl_sclk,
osl_ss => osl_ss,
osl_mosi => osl_mosi,
S_AXI_ACLK => s00_axi_aclk,
S_AXI_ARESETN => s00_axi_aresetn,
S_AXI_AWID => s00_axi_awid,
S_AXI_AWADDR => s00_axi_awaddr,
S_AXI_AWLEN => s00_axi_awlen,
S_AXI_AWSIZE => s00_axi_awsize,
S_AXI_AWBURST => s00_axi_awburst,
S_AXI_AWVALID => s00_axi_awvalid,
S_AXI_AWREADY => s00_axi_awready,
S_AXI_WDATA => s00_axi_wdata,
S_AXI_WSTRB => s00_axi_wstrb,
S_AXI_WLAST => s00_axi_wlast,
S_AXI_WVALID => s00_axi_wvalid,
S_AXI_WREADY => s00_axi_wready,
S_AXI_BID => s00_axi_bid,
S_AXI_BRESP => s00_axi_bresp,
S_AXI_BVALID => s00_axi_bvalid,
S_AXI_BREADY => s00_axi_bready,
S_AXI_ARID => s00_axi_arid,
S_AXI_ARADDR => s00_axi_araddr,
S_AXI_ARLEN => s00_axi_arlen,
S_AXI_ARSIZE => s00_axi_arsize,
S_AXI_ARBURST => s00_axi_arburst,
S_AXI_ARVALID => s00_axi_arvalid,
S_AXI_ARREADY => s00_axi_arready,
S_AXI_RID => s00_axi_rid,
S_AXI_RDATA => s00_axi_rdata,
S_AXI_RRESP => s00_axi_rresp,
S_AXI_RLAST => s00_axi_rlast,
S_AXI_RVALID => s00_axi_rvalid,
S_AXI_RREADY => s00_axi_rready
);
-- Add user logic here
-- User logic ends
end arch_imp;
|
-- (c) Copyright 1995-2016 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- DO NOT MODIFY THIS FILE.
-- IP VLNV: xilinx.com:ip:dist_mem_gen:8.0
-- IP Revision: 9
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
LIBRARY dist_mem_gen_v8_0_9;
USE dist_mem_gen_v8_0_9.dist_mem_gen_v8_0_9;
ENTITY dist_mem_gen_0 IS
PORT (
a : IN STD_LOGIC_VECTOR(11 DOWNTO 0);
spo : OUT STD_LOGIC_VECTOR(1023 DOWNTO 0)
);
END dist_mem_gen_0;
ARCHITECTURE dist_mem_gen_0_arch OF dist_mem_gen_0 IS
ATTRIBUTE DowngradeIPIdentifiedWarnings : string;
ATTRIBUTE DowngradeIPIdentifiedWarnings OF dist_mem_gen_0_arch: ARCHITECTURE IS "yes";
COMPONENT dist_mem_gen_v8_0_9 IS
GENERIC (
C_FAMILY : STRING;
C_ADDR_WIDTH : INTEGER;
C_DEFAULT_DATA : STRING;
C_DEPTH : INTEGER;
C_HAS_CLK : INTEGER;
C_HAS_D : INTEGER;
C_HAS_DPO : INTEGER;
C_HAS_DPRA : INTEGER;
C_HAS_I_CE : INTEGER;
C_HAS_QDPO : INTEGER;
C_HAS_QDPO_CE : INTEGER;
C_HAS_QDPO_CLK : INTEGER;
C_HAS_QDPO_RST : INTEGER;
C_HAS_QDPO_SRST : INTEGER;
C_HAS_QSPO : INTEGER;
C_HAS_QSPO_CE : INTEGER;
C_HAS_QSPO_RST : INTEGER;
C_HAS_QSPO_SRST : INTEGER;
C_HAS_SPO : INTEGER;
C_HAS_WE : INTEGER;
C_MEM_INIT_FILE : STRING;
C_ELABORATION_DIR : STRING;
C_MEM_TYPE : INTEGER;
C_PIPELINE_STAGES : INTEGER;
C_QCE_JOINED : INTEGER;
C_QUALIFY_WE : INTEGER;
C_READ_MIF : INTEGER;
C_REG_A_D_INPUTS : INTEGER;
C_REG_DPRA_INPUT : INTEGER;
C_SYNC_ENABLE : INTEGER;
C_WIDTH : INTEGER;
C_PARSER_TYPE : INTEGER
);
PORT (
a : IN STD_LOGIC_VECTOR(11 DOWNTO 0);
d : IN STD_LOGIC_VECTOR(1023 DOWNTO 0);
dpra : IN STD_LOGIC_VECTOR(11 DOWNTO 0);
clk : IN STD_LOGIC;
we : IN STD_LOGIC;
i_ce : IN STD_LOGIC;
qspo_ce : IN STD_LOGIC;
qdpo_ce : IN STD_LOGIC;
qdpo_clk : IN STD_LOGIC;
qspo_rst : IN STD_LOGIC;
qdpo_rst : IN STD_LOGIC;
qspo_srst : IN STD_LOGIC;
qdpo_srst : IN STD_LOGIC;
spo : OUT STD_LOGIC_VECTOR(1023 DOWNTO 0);
dpo : OUT STD_LOGIC_VECTOR(1023 DOWNTO 0);
qspo : OUT STD_LOGIC_VECTOR(1023 DOWNTO 0);
qdpo : OUT STD_LOGIC_VECTOR(1023 DOWNTO 0)
);
END COMPONENT dist_mem_gen_v8_0_9;
ATTRIBUTE X_CORE_INFO : STRING;
ATTRIBUTE X_CORE_INFO OF dist_mem_gen_0_arch: ARCHITECTURE IS "dist_mem_gen_v8_0_9,Vivado 2015.4";
ATTRIBUTE CHECK_LICENSE_TYPE : STRING;
ATTRIBUTE CHECK_LICENSE_TYPE OF dist_mem_gen_0_arch : ARCHITECTURE IS "dist_mem_gen_0,dist_mem_gen_v8_0_9,{}";
ATTRIBUTE CORE_GENERATION_INFO : STRING;
ATTRIBUTE CORE_GENERATION_INFO OF dist_mem_gen_0_arch: ARCHITECTURE IS "dist_mem_gen_0,dist_mem_gen_v8_0_9,{x_ipProduct=Vivado 2015.4,x_ipVendor=xilinx.com,x_ipLibrary=ip,x_ipName=dist_mem_gen,x_ipVersion=8.0,x_ipCoreRevision=9,x_ipLanguage=VHDL,x_ipSimLanguage=MIXED,C_FAMILY=artix7,C_ADDR_WIDTH=12,C_DEFAULT_DATA=0,C_DEPTH=4096,C_HAS_CLK=0,C_HAS_D=0,C_HAS_DPO=0,C_HAS_DPRA=0,C_HAS_I_CE=0,C_HAS_QDPO=0,C_HAS_QDPO_CE=0,C_HAS_QDPO_CLK=0,C_HAS_QDPO_RST=0,C_HAS_QDPO_SRST=0,C_HAS_QSPO=0,C_HAS_QSPO_CE=0,C_HAS_QSPO_RST=0,C_HAS_QSPO_SRST=0,C_HAS_SPO=1,C_HAS_WE=0,C_MEM_INIT_FILE=dist_mem_gen_0.mif,C_ELABORATION_DIR=./,C_MEM_TYPE=0,C_PIPELINE_STAGES=0,C_QCE_JOINED=0,C_QUALIFY_WE=0,C_READ_MIF=1,C_REG_A_D_INPUTS=0,C_REG_DPRA_INPUT=0,C_SYNC_ENABLE=1,C_WIDTH=1024,C_PARSER_TYPE=1}";
BEGIN
U0 : dist_mem_gen_v8_0_9
GENERIC MAP (
C_FAMILY => "artix7",
C_ADDR_WIDTH => 12,
C_DEFAULT_DATA => "0",
C_DEPTH => 4096,
C_HAS_CLK => 0,
C_HAS_D => 0,
C_HAS_DPO => 0,
C_HAS_DPRA => 0,
C_HAS_I_CE => 0,
C_HAS_QDPO => 0,
C_HAS_QDPO_CE => 0,
C_HAS_QDPO_CLK => 0,
C_HAS_QDPO_RST => 0,
C_HAS_QDPO_SRST => 0,
C_HAS_QSPO => 0,
C_HAS_QSPO_CE => 0,
C_HAS_QSPO_RST => 0,
C_HAS_QSPO_SRST => 0,
C_HAS_SPO => 1,
C_HAS_WE => 0,
C_MEM_INIT_FILE => "dist_mem_gen_0.mif",
C_ELABORATION_DIR => "./",
C_MEM_TYPE => 0,
C_PIPELINE_STAGES => 0,
C_QCE_JOINED => 0,
C_QUALIFY_WE => 0,
C_READ_MIF => 1,
C_REG_A_D_INPUTS => 0,
C_REG_DPRA_INPUT => 0,
C_SYNC_ENABLE => 1,
C_WIDTH => 1024,
C_PARSER_TYPE => 1
)
PORT MAP (
a => a,
d => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1024)),
dpra => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 12)),
clk => '0',
we => '0',
i_ce => '1',
qspo_ce => '1',
qdpo_ce => '1',
qdpo_clk => '0',
qspo_rst => '0',
qdpo_rst => '0',
qspo_srst => '0',
qdpo_srst => '0',
spo => spo
);
END dist_mem_gen_0_arch;
|
-- *************************************************************************
--
-- (c) Copyright 2010-2011 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- *************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: axi_sg.vhd
--
-- Description:
-- Top level VHDL wrapper for the AXI DataMover
--
--
--
--
-- VHDL-Standard: VHDL'93
-------------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
library axi_sg_v4_1;
use axi_sg_v4_1.axi_sg_mm2s_basic_wrap;
use axi_sg_v4_1.axi_sg_s2mm_basic_wrap;
-------------------------------------------------------------------------------
entity axi_sg_datamover is
generic (
C_INCLUDE_MM2S : Integer range 0 to 2 := 2;
-- Specifies the type of MM2S function to include
-- 0 = Omit MM2S functionality
-- 1 = Full MM2S Functionality
-- 2 = Basic MM2S functionality
C_M_AXI_MM2S_ARID : Integer range 0 to 255 := 0;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_MM2S_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the MM2S ID port
C_M_AXI_MM2S_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_MM2S_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_M_AXIS_MM2S_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the MM2S Master Stream Data
-- Channel data bus
C_INCLUDE_MM2S_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit MM2S Status FIFO
-- 1 = Include MM2S Status FIFO
C_MM2S_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the MM2S Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_MM2S_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_MM2S_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the MM2S function
-- 0 = Omit DRE
-- 1 = Include DRE
C_MM2S_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the MM2S function
C_MM2S_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the MM2S Command Interface
C_MM2S_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the MM2S internal
-- child command queues in the Read Address Controller and
-- the Read Data Controller. Increasing this value will
-- allow more Read Addresses to be issued to the AXI4 Read
-- Address Channel before receipt of the associated read
-- data on the Read Data Channel.
C_MM2S_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- MM2S (Read) Store and Forward function
-- 0 = Omit MM2S Store and Forward
-- 1 = Include MM2S Store and Forward
C_INCLUDE_S2MM : Integer range 0 to 4 := 2;
-- Specifies the type of S2MM function to include
-- 0 = Omit S2MM functionality
-- 1 = Full S2MM Functionality
-- 2 = Basic S2MM functionality
C_M_AXI_S2MM_AWID : Integer range 0 to 255 := 1;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_S2MM_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the S2MM ID port
C_M_AXI_S2MM_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_S2MM_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_S_AXIS_S2MM_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the S2MM Master Stream Data
-- Channel data bus
C_INCLUDE_S2MM_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit S2MM Status FIFO
-- 1 = Include S2MM Status FIFO
C_S2MM_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the S2MM Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_S2MM_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_S2MM_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the S2MM function
-- 0 = Omit DRE
-- 1 = Include DRE
C_S2MM_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the S2MM function
C_S2MM_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the S2MM Command Interface
C_S2MM_SUPPORT_INDET_BTT : Integer range 0 to 1 := 0;
-- Specifies if support for indeterminate packet lengths
-- are to be received on the input Stream interface
-- 0 = Omit support (User MUST transfer the exact number of
-- bytes on the Stream interface as specified in the BTT
-- field of the Corresponding DataMover Command)
-- 1 = Include support for indeterminate packet lengths
-- This causes FIFOs to be added and "Store and Forward"
-- behavior of the S2MM function
C_S2MM_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the S2MM internal
-- address pipeline queues in the Write Address Controller
-- and the Write Data Controller. Increasing this value will
-- allow more Write Addresses to be issued to the AXI4 Write
-- Address Channel before transmission of the associated
-- write data on the Write Data Channel.
C_S2MM_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- S2MM (Write) Store and Forward function
-- 0 = Omit S2MM Store and Forward
-- 1 = Include S2MM Store and Forward
C_ENABLE_MULTI_CHANNEL : integer range 0 to 1 := 1;
C_ENABLE_EXTRA_FIELD : integer range 0 to 1 := 0;
C_FAMILY : String := "virtex7"
-- Specifies the target FPGA family type
);
port (
-- MM2S Primary Clock input ----------------------------------
m_axi_mm2s_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- MM2S Primary Reset input --
m_axi_mm2s_aresetn : in std_logic; --
-- Reset used for the internal master logic --
--------------------------------------------------------------
sg_ctl : in std_logic_vector (7 downto 0) ;
-- MM2S Halt request input control --------------------
mm2s_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- MM2S Halt Complete status flag --
mm2s_halt_cmplt : Out std_logic; --
-- Active high soft shutdown complete status --
-------------------------------------------------------
-- Error discrete output -------------------------
mm2s_err : Out std_logic; --
-- Composite Error indication --
--------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O ---------
m_axis_mm2s_cmdsts_aclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_mm2s_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) -------------------------------------------------
s_axis_mm2s_cmd_tvalid : in std_logic; --
s_axis_mm2s_cmd_tready : out std_logic; --
s_axis_mm2s_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_MM2S_ADDR_WIDTH+40)-1 downto 0); --
----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) ------------------------
m_axis_mm2s_sts_tvalid : out std_logic; --
m_axis_mm2s_sts_tready : in std_logic; --
m_axis_mm2s_sts_tdata : out std_logic_vector(7 downto 0); --
m_axis_mm2s_sts_tkeep : out std_logic_vector(0 downto 0); --
m_axis_mm2s_sts_tlast : out std_logic; --
--------------------------------------------------------------------
-- Address Posting contols -----------------------
mm2s_allow_addr_req : in std_logic; --
mm2s_addr_req_posted : out std_logic; --
mm2s_rd_xfer_cmplt : out std_logic; --
--------------------------------------------------
-- MM2S AXI Address Channel I/O --------------------------------------------------
m_axi_mm2s_arid : out std_logic_vector(C_M_AXI_MM2S_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_mm2s_araddr : out std_logic_vector(C_M_AXI_MM2S_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_mm2s_arlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_mm2s_arsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_mm2s_arburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_mm2s_arprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_mm2s_arcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_mm2s_aruser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_mm2s_arvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_mm2s_arready : in std_logic; --
-- AXI Address Channel READY input --
-----------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_mm2s_alock : out std_logic_vector(2 downto 0); --
-- m_axi_mm2s_acache : out std_logic_vector(4 downto 0); --
-- m_axi_mm2s_aqos : out std_logic_vector(3 downto 0); --
-- m_axi_mm2s_aregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- MM2S AXI MMap Read Data Channel I/O ------------------------------------------------
m_axi_mm2s_rdata : In std_logic_vector(C_M_AXI_MM2S_DATA_WIDTH-1 downto 0); --
m_axi_mm2s_rresp : In std_logic_vector(1 downto 0); --
m_axi_mm2s_rlast : In std_logic; --
m_axi_mm2s_rvalid : In std_logic; --
m_axi_mm2s_rready : Out std_logic; --
----------------------------------------------------------------------------------------
-- MM2S AXI Master Stream Channel I/O -------------------------------------------------------
m_axis_mm2s_tdata : Out std_logic_vector(C_M_AXIS_MM2S_TDATA_WIDTH-1 downto 0); --
m_axis_mm2s_tkeep : Out std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0); --
m_axis_mm2s_tlast : Out std_logic; --
m_axis_mm2s_tvalid : Out std_logic; --
m_axis_mm2s_tready : In std_logic; --
----------------------------------------------------------------------------------------------
-- Testing Support I/O --------------------------------------------------------
mm2s_dbg_sel : in std_logic_vector( 3 downto 0); --
mm2s_dbg_data : out std_logic_vector(31 downto 0) ; --
-------------------------------------------------------------------------------
-- S2MM Primary Clock input ---------------------------------
m_axi_s2mm_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- S2MM Primary Reset input --
m_axi_s2mm_aresetn : in std_logic; --
-- Reset used for the internal master logic --
-------------------------------------------------------------
-- S2MM Halt request input control ------------------
s2mm_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- S2MM Halt Complete status flag --
s2mm_halt_cmplt : out std_logic; --
-- Active high soft shutdown complete status --
-----------------------------------------------------
-- S2MM Error discrete output ------------------
s2mm_err : Out std_logic; --
-- Composite Error indication --
------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O -----------------
m_axis_s2mm_cmdsts_awclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_s2mm_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
--------------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) --------------------------------------------------
s_axis_s2mm_cmd_tvalid : in std_logic; --
s_axis_s2mm_cmd_tready : out std_logic; --
s_axis_s2mm_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_S2MM_ADDR_WIDTH+40)-1 downto 0); --
-----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) -----------------------------------------------------------
m_axis_s2mm_sts_tvalid : out std_logic; --
m_axis_s2mm_sts_tready : in std_logic; --
m_axis_s2mm_sts_tdata : out std_logic_vector(((C_S2MM_SUPPORT_INDET_BTT*24)+8)-1 downto 0); --
m_axis_s2mm_sts_tkeep : out std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0); --
m_axis_s2mm_sts_tlast : out std_logic; --
-------------------------------------------------------------------------------------------------------
-- Address posting controls -----------------------------------------
s2mm_allow_addr_req : in std_logic; --
s2mm_addr_req_posted : out std_logic; --
s2mm_wr_xfer_cmplt : out std_logic; --
s2mm_ld_nxt_len : out std_logic; --
s2mm_wr_len : out std_logic_vector(7 downto 0); --
---------------------------------------------------------------------
-- S2MM AXI Address Channel I/O ----------------------------------------------------
m_axi_s2mm_awid : out std_logic_vector(C_M_AXI_S2MM_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_s2mm_awaddr : out std_logic_vector(C_M_AXI_S2MM_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_s2mm_awlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_s2mm_awsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_s2mm_awburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_s2mm_awprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_s2mm_awcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_s2mm_awuser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_s2mm_awvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_s2mm_awready : in std_logic; --
-- AXI Address Channel READY input --
-------------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_s2mm__awlock : out std_logic_vector(2 downto 0); --
-- m_axi_s2mm__awcache : out std_logic_vector(4 downto 0); --
-- m_axi_s2mm__awqos : out std_logic_vector(3 downto 0); --
-- m_axi_s2mm__awregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- S2MM AXI MMap Write Data Channel I/O --------------------------------------------------
m_axi_s2mm_wdata : Out std_logic_vector(C_M_AXI_S2MM_DATA_WIDTH-1 downto 0); --
m_axi_s2mm_wstrb : Out std_logic_vector((C_M_AXI_S2MM_DATA_WIDTH/8)-1 downto 0); --
m_axi_s2mm_wlast : Out std_logic; --
m_axi_s2mm_wvalid : Out std_logic; --
m_axi_s2mm_wready : In std_logic; --
-------------------------------------------------------------------------------------------
-- S2MM AXI MMap Write response Channel I/O -------------------------
m_axi_s2mm_bresp : In std_logic_vector(1 downto 0); --
m_axi_s2mm_bvalid : In std_logic; --
m_axi_s2mm_bready : Out std_logic; --
----------------------------------------------------------------------
-- S2MM AXI Slave Stream Channel I/O -------------------------------------------------------
s_axis_s2mm_tdata : In std_logic_vector(C_S_AXIS_S2MM_TDATA_WIDTH-1 downto 0); --
s_axis_s2mm_tkeep : In std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0); --
s_axis_s2mm_tlast : In std_logic; --
s_axis_s2mm_tvalid : In std_logic; --
s_axis_s2mm_tready : Out std_logic; --
---------------------------------------------------------------------------------------------
-- Testing Support I/O ------------------------------------------------
s2mm_dbg_sel : in std_logic_vector( 3 downto 0); --
s2mm_dbg_data : out std_logic_vector(31 downto 0) --
------------------------------------------------------------------------
);
end entity axi_sg_datamover;
architecture implementation of axi_sg_datamover is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-- Function Declarations
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_clip_brst_len
--
-- Function Description:
-- This function is used to limit the parameterized max burst
-- databeats when the tranfer data width is 256 bits or greater.
-- This is required to keep from crossing the 4K byte xfer
-- boundary required by AXI. This process is further complicated
-- by the inclusion/omission of upsizers or downsizers in the
-- data path.
--
-------------------------------------------------------------------
function funct_clip_brst_len (param_burst_beats : integer;
mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
constant FCONST_SIZERS_ENABLED : boolean := (down_up_sizers_enabled > 0);
Variable fvar_max_burst_dbeats : Integer;
begin
-- coverage off
if (FCONST_SIZERS_ENABLED) then -- use MMap dwidth for calc
If (mmap_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (mmap_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (mmap_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit mmap width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
End if;
else -- use stream dwidth for calc
If (stream_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (stream_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (stream_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit stream width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
-- coverage on
End if;
end if;
Return (fvar_max_burst_dbeats);
end function funct_clip_brst_len;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_depth_16
--
-- Function Description:
-- This function is used to fix the Command and Status FIFO depths to
-- 16 entries when Async clocking mode is enabled. This is required
-- due to the way the async_fifo_fg.vhd design in proc_common is
-- implemented.
-------------------------------------------------------------------
function funct_fix_depth_16 (async_clocking_mode : integer;
requested_depth : integer) return integer is
Variable fvar_depth_2_use : Integer;
begin
-- coverage off
If (async_clocking_mode = 1) Then -- async mode so fix at 16
fvar_depth_2_use := 16;
Elsif (requested_depth > 16) Then -- limit at 16
fvar_depth_2_use := 16;
-- coverage on
Else -- use requested depth
fvar_depth_2_use := requested_depth;
End if;
Return (fvar_depth_2_use);
end function funct_fix_depth_16;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_min_btt_width
--
-- Function Description:
-- This function calculates the minimum required value
-- for the used width of the command BTT field.
--
-------------------------------------------------------------------
function funct_get_min_btt_width (max_burst_beats : integer;
bytes_per_beat : integer ) return integer is
Variable var_min_btt_needed : Integer;
Variable var_max_bytes_per_burst : Integer;
begin
var_max_bytes_per_burst := max_burst_beats*bytes_per_beat;
-- coverage off
if (var_max_bytes_per_burst <= 16) then
var_min_btt_needed := 5;
elsif (var_max_bytes_per_burst <= 32) then
var_min_btt_needed := 6;
-- coverage on
elsif (var_max_bytes_per_burst <= 64) then
var_min_btt_needed := 7;
-- coverage off
elsif (var_max_bytes_per_burst <= 128) then
var_min_btt_needed := 8;
elsif (var_max_bytes_per_burst <= 256) then
var_min_btt_needed := 9;
elsif (var_max_bytes_per_burst <= 512) then
var_min_btt_needed := 10;
elsif (var_max_bytes_per_burst <= 1024) then
var_min_btt_needed := 11;
elsif (var_max_bytes_per_burst <= 2048) then
var_min_btt_needed := 12;
elsif (var_max_bytes_per_burst <= 4096) then
var_min_btt_needed := 13;
else -- 8K byte range
var_min_btt_needed := 14;
end if;
-- coverage on
Return (var_min_btt_needed);
end function funct_get_min_btt_width;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_xfer_bytes_per_dbeat
--
-- Function Description:
-- Calculates the nuber of bytes that will transfered per databeat
-- on the AXI4 MMap Bus.
--
-------------------------------------------------------------------
function funct_get_xfer_bytes_per_dbeat (mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
Variable temp_bytes_per_dbeat : Integer := 4;
begin
-- coverage off
if (down_up_sizers_enabled > 0) then -- down/up sizers are in use, use full mmap dwidth
temp_bytes_per_dbeat := mmap_transfer_bit_width/8;
-- coverage on
else -- No down/up sizers so use Stream data width
temp_bytes_per_dbeat := stream_transfer_bit_width/8;
end if;
Return (temp_bytes_per_dbeat);
end function funct_get_xfer_bytes_per_dbeat;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_btt_used
--
-- Function Description:
-- THis function makes sure the BTT width used is at least the
-- minimum needed.
--
-------------------------------------------------------------------
function funct_fix_btt_used (requested_btt_width : integer;
min_btt_width : integer) return integer is
Variable var_corrected_btt_width : Integer;
begin
-- coverage off
If (requested_btt_width < min_btt_width) Then
var_corrected_btt_width := min_btt_width;
-- coverage on
else
var_corrected_btt_width := requested_btt_width;
End if;
Return (var_corrected_btt_width);
end function funct_fix_btt_used;
-------------------------------------------------------------------
-- Constant Declarations
-------------------------------------------------------------------
Constant MM2S_TAG_WIDTH : integer := 4;
Constant S2MM_TAG_WIDTH : integer := 4;
Constant MM2S_DOWNSIZER_ENABLED : integer := C_MM2S_INCLUDE_SF;
Constant S2MM_UPSIZER_ENABLED : integer := C_S2MM_INCLUDE_SF + C_S2MM_SUPPORT_INDET_BTT;
Constant MM2S_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_MM2S_BURST_SIZE,
C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant S2MM_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_S2MM_BURST_SIZE,
C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant MM2S_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_MM2S_STSCMD_IS_ASYNC,
C_MM2S_STSCMD_FIFO_DEPTH);
Constant S2MM_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_S2MM_STSCMD_IS_ASYNC,
C_S2MM_STSCMD_FIFO_DEPTH);
Constant MM2S_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant MM2S_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(MM2S_MAX_BURST_BEATS,
MM2S_BYTES_PER_BEAT);
Constant MM2S_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_MM2S_BTT_USED,
MM2S_MIN_BTT_NEEDED);
Constant S2MM_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant S2MM_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(S2MM_MAX_BURST_BEATS,
S2MM_BYTES_PER_BEAT);
Constant S2MM_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_S2MM_BTT_USED,
S2MM_MIN_BTT_NEEDED);
-- Signals
signal sig_mm2s_tstrb : std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_mm2s_sts_tstrb : std_logic_vector(0 downto 0) := (others => '0');
signal sig_s2mm_tstrb : std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_s2mm_sts_tstrb : std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0) := (others => '0');
begin --(architecture implementation)
-------------------------------------------------------------
-- Conversion to tkeep for external stream connnections
-------------------------------------------------------------
-- MM2S Stream Output
m_axis_mm2s_tkeep <= sig_mm2s_tstrb ;
-- MM2S Status Stream Output
m_axis_mm2s_sts_tkeep <= sig_mm2s_sts_tstrb ;
-- S2MM Stream Input
sig_s2mm_tstrb <= s_axis_s2mm_tkeep ;
-- S2MM Status Stream Output
m_axis_s2mm_sts_tkeep <= sig_s2mm_sts_tstrb ;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_MM2S_BASIC
--
-- If Generate Description:
-- Instantiate the MM2S Basic Wrapper
--
--
------------------------------------------------------------
GEN_MM2S_BASIC : if (C_INCLUDE_MM2S = 2) generate
begin
------------------------------------------------------------
-- Instance: I_MM2S_BASIC_WRAPPER
--
-- Description:
-- Read Basic Wrapper Instance
--
------------------------------------------------------------
I_MM2S_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_mm2s_basic_wrap
generic map (
C_INCLUDE_MM2S => C_INCLUDE_MM2S ,
C_MM2S_ARID => C_M_AXI_MM2S_ARID ,
C_MM2S_ID_WIDTH => C_M_AXI_MM2S_ID_WIDTH ,
C_MM2S_ADDR_WIDTH => C_M_AXI_MM2S_ADDR_WIDTH ,
C_MM2S_MDATA_WIDTH => C_M_AXI_MM2S_DATA_WIDTH ,
C_MM2S_SDATA_WIDTH => C_M_AXIS_MM2S_TDATA_WIDTH ,
C_INCLUDE_MM2S_STSFIFO => C_INCLUDE_MM2S_STSFIFO ,
C_MM2S_STSCMD_FIFO_DEPTH => MM2S_CMDSTS_FIFO_DEPTH ,
C_MM2S_STSCMD_IS_ASYNC => C_MM2S_STSCMD_IS_ASYNC ,
C_INCLUDE_MM2S_DRE => C_INCLUDE_MM2S_DRE ,
C_MM2S_BURST_SIZE => MM2S_MAX_BURST_BEATS ,
C_MM2S_BTT_USED => MM2S_CORRECTED_BTT_USED ,
C_MM2S_ADDR_PIPE_DEPTH => C_MM2S_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => MM2S_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
mm2s_aclk => m_axi_mm2s_aclk ,
mm2s_aresetn => m_axi_mm2s_aresetn ,
sg_ctl => sg_ctl ,
mm2s_halt => mm2s_halt ,
mm2s_halt_cmplt => mm2s_halt_cmplt ,
mm2s_err => mm2s_err ,
mm2s_cmdsts_awclk => m_axis_mm2s_cmdsts_aclk ,
mm2s_cmdsts_aresetn => m_axis_mm2s_cmdsts_aresetn ,
mm2s_cmd_wvalid => s_axis_mm2s_cmd_tvalid ,
mm2s_cmd_wready => s_axis_mm2s_cmd_tready ,
mm2s_cmd_wdata => s_axis_mm2s_cmd_tdata ,
mm2s_sts_wvalid => m_axis_mm2s_sts_tvalid ,
mm2s_sts_wready => m_axis_mm2s_sts_tready ,
mm2s_sts_wdata => m_axis_mm2s_sts_tdata ,
mm2s_sts_wstrb => sig_mm2s_sts_tstrb ,
mm2s_sts_wlast => m_axis_mm2s_sts_tlast ,
mm2s_allow_addr_req => mm2s_allow_addr_req ,
mm2s_addr_req_posted => mm2s_addr_req_posted ,
mm2s_rd_xfer_cmplt => mm2s_rd_xfer_cmplt ,
mm2s_arid => m_axi_mm2s_arid ,
mm2s_araddr => m_axi_mm2s_araddr ,
mm2s_arlen => m_axi_mm2s_arlen ,
mm2s_arsize => m_axi_mm2s_arsize ,
mm2s_arburst => m_axi_mm2s_arburst ,
mm2s_arprot => m_axi_mm2s_arprot ,
mm2s_arcache => m_axi_mm2s_arcache ,
mm2s_aruser => m_axi_mm2s_aruser ,
mm2s_arvalid => m_axi_mm2s_arvalid ,
mm2s_arready => m_axi_mm2s_arready ,
mm2s_rdata => m_axi_mm2s_rdata ,
mm2s_rresp => m_axi_mm2s_rresp ,
mm2s_rlast => m_axi_mm2s_rlast ,
mm2s_rvalid => m_axi_mm2s_rvalid ,
mm2s_rready => m_axi_mm2s_rready ,
mm2s_strm_wdata => m_axis_mm2s_tdata ,
mm2s_strm_wstrb => sig_mm2s_tstrb ,
mm2s_strm_wlast => m_axis_mm2s_tlast ,
mm2s_strm_wvalid => m_axis_mm2s_tvalid ,
mm2s_strm_wready => m_axis_mm2s_tready ,
mm2s_dbg_sel => mm2s_dbg_sel ,
mm2s_dbg_data => mm2s_dbg_data
);
end generate GEN_MM2S_BASIC;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_S2MM_BASIC
--
-- If Generate Description:
-- Instantiate the S2MM Basic Wrapper
--
--
------------------------------------------------------------
GEN_S2MM_BASIC : if (C_INCLUDE_S2MM = 2) generate
begin
------------------------------------------------------------
-- Instance: I_S2MM_BASIC_WRAPPER
--
-- Description:
-- Write Basic Wrapper Instance
--
------------------------------------------------------------
I_S2MM_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_s2mm_basic_wrap
generic map (
C_INCLUDE_S2MM => C_INCLUDE_S2MM ,
C_S2MM_AWID => C_M_AXI_S2MM_AWID ,
C_S2MM_ID_WIDTH => C_M_AXI_S2MM_ID_WIDTH ,
C_S2MM_ADDR_WIDTH => C_M_AXI_S2MM_ADDR_WIDTH ,
C_S2MM_MDATA_WIDTH => C_M_AXI_S2MM_DATA_WIDTH ,
C_S2MM_SDATA_WIDTH => C_S_AXIS_S2MM_TDATA_WIDTH ,
C_INCLUDE_S2MM_STSFIFO => C_INCLUDE_S2MM_STSFIFO ,
C_S2MM_STSCMD_FIFO_DEPTH => S2MM_CMDSTS_FIFO_DEPTH ,
C_S2MM_STSCMD_IS_ASYNC => C_S2MM_STSCMD_IS_ASYNC ,
C_INCLUDE_S2MM_DRE => C_INCLUDE_S2MM_DRE ,
C_S2MM_BURST_SIZE => S2MM_MAX_BURST_BEATS ,
C_S2MM_ADDR_PIPE_DEPTH => C_S2MM_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => S2MM_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
s2mm_aclk => m_axi_s2mm_aclk ,
s2mm_aresetn => m_axi_s2mm_aresetn ,
sg_ctl => sg_ctl ,
s2mm_halt => s2mm_halt ,
s2mm_halt_cmplt => s2mm_halt_cmplt ,
s2mm_err => s2mm_err ,
s2mm_cmdsts_awclk => m_axis_s2mm_cmdsts_awclk ,
s2mm_cmdsts_aresetn => m_axis_s2mm_cmdsts_aresetn ,
s2mm_cmd_wvalid => s_axis_s2mm_cmd_tvalid ,
s2mm_cmd_wready => s_axis_s2mm_cmd_tready ,
s2mm_cmd_wdata => s_axis_s2mm_cmd_tdata ,
s2mm_sts_wvalid => m_axis_s2mm_sts_tvalid ,
s2mm_sts_wready => m_axis_s2mm_sts_tready ,
s2mm_sts_wdata => m_axis_s2mm_sts_tdata ,
s2mm_sts_wstrb => sig_s2mm_sts_tstrb ,
s2mm_sts_wlast => m_axis_s2mm_sts_tlast ,
s2mm_allow_addr_req => s2mm_allow_addr_req ,
s2mm_addr_req_posted => s2mm_addr_req_posted ,
s2mm_wr_xfer_cmplt => s2mm_wr_xfer_cmplt ,
s2mm_ld_nxt_len => s2mm_ld_nxt_len ,
s2mm_wr_len => s2mm_wr_len ,
s2mm_awid => m_axi_s2mm_awid ,
s2mm_awaddr => m_axi_s2mm_awaddr ,
s2mm_awlen => m_axi_s2mm_awlen ,
s2mm_awsize => m_axi_s2mm_awsize ,
s2mm_awburst => m_axi_s2mm_awburst ,
s2mm_awprot => m_axi_s2mm_awprot ,
s2mm_awcache => m_axi_s2mm_awcache ,
s2mm_awuser => m_axi_s2mm_awuser ,
s2mm_awvalid => m_axi_s2mm_awvalid ,
s2mm_awready => m_axi_s2mm_awready ,
s2mm_wdata => m_axi_s2mm_wdata ,
s2mm_wstrb => m_axi_s2mm_wstrb ,
s2mm_wlast => m_axi_s2mm_wlast ,
s2mm_wvalid => m_axi_s2mm_wvalid ,
s2mm_wready => m_axi_s2mm_wready ,
s2mm_bresp => m_axi_s2mm_bresp ,
s2mm_bvalid => m_axi_s2mm_bvalid ,
s2mm_bready => m_axi_s2mm_bready ,
s2mm_strm_wdata => s_axis_s2mm_tdata ,
s2mm_strm_wstrb => sig_s2mm_tstrb ,
s2mm_strm_wlast => s_axis_s2mm_tlast ,
s2mm_strm_wvalid => s_axis_s2mm_tvalid ,
s2mm_strm_wready => s_axis_s2mm_tready ,
s2mm_dbg_sel => s2mm_dbg_sel ,
s2mm_dbg_data => s2mm_dbg_data
);
end generate GEN_S2MM_BASIC;
end implementation;
|
-- *************************************************************************
--
-- (c) Copyright 2010-2011 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- *************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: axi_sg.vhd
--
-- Description:
-- Top level VHDL wrapper for the AXI DataMover
--
--
--
--
-- VHDL-Standard: VHDL'93
-------------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
library axi_sg_v4_1;
use axi_sg_v4_1.axi_sg_mm2s_basic_wrap;
use axi_sg_v4_1.axi_sg_s2mm_basic_wrap;
-------------------------------------------------------------------------------
entity axi_sg_datamover is
generic (
C_INCLUDE_MM2S : Integer range 0 to 2 := 2;
-- Specifies the type of MM2S function to include
-- 0 = Omit MM2S functionality
-- 1 = Full MM2S Functionality
-- 2 = Basic MM2S functionality
C_M_AXI_MM2S_ARID : Integer range 0 to 255 := 0;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_MM2S_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the MM2S ID port
C_M_AXI_MM2S_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_MM2S_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_M_AXIS_MM2S_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the MM2S Master Stream Data
-- Channel data bus
C_INCLUDE_MM2S_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit MM2S Status FIFO
-- 1 = Include MM2S Status FIFO
C_MM2S_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the MM2S Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_MM2S_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_MM2S_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the MM2S function
-- 0 = Omit DRE
-- 1 = Include DRE
C_MM2S_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the MM2S function
C_MM2S_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the MM2S Command Interface
C_MM2S_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the MM2S internal
-- child command queues in the Read Address Controller and
-- the Read Data Controller. Increasing this value will
-- allow more Read Addresses to be issued to the AXI4 Read
-- Address Channel before receipt of the associated read
-- data on the Read Data Channel.
C_MM2S_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- MM2S (Read) Store and Forward function
-- 0 = Omit MM2S Store and Forward
-- 1 = Include MM2S Store and Forward
C_INCLUDE_S2MM : Integer range 0 to 4 := 2;
-- Specifies the type of S2MM function to include
-- 0 = Omit S2MM functionality
-- 1 = Full S2MM Functionality
-- 2 = Basic S2MM functionality
C_M_AXI_S2MM_AWID : Integer range 0 to 255 := 1;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_S2MM_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the S2MM ID port
C_M_AXI_S2MM_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_S2MM_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_S_AXIS_S2MM_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the S2MM Master Stream Data
-- Channel data bus
C_INCLUDE_S2MM_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit S2MM Status FIFO
-- 1 = Include S2MM Status FIFO
C_S2MM_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the S2MM Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_S2MM_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_S2MM_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the S2MM function
-- 0 = Omit DRE
-- 1 = Include DRE
C_S2MM_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the S2MM function
C_S2MM_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the S2MM Command Interface
C_S2MM_SUPPORT_INDET_BTT : Integer range 0 to 1 := 0;
-- Specifies if support for indeterminate packet lengths
-- are to be received on the input Stream interface
-- 0 = Omit support (User MUST transfer the exact number of
-- bytes on the Stream interface as specified in the BTT
-- field of the Corresponding DataMover Command)
-- 1 = Include support for indeterminate packet lengths
-- This causes FIFOs to be added and "Store and Forward"
-- behavior of the S2MM function
C_S2MM_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the S2MM internal
-- address pipeline queues in the Write Address Controller
-- and the Write Data Controller. Increasing this value will
-- allow more Write Addresses to be issued to the AXI4 Write
-- Address Channel before transmission of the associated
-- write data on the Write Data Channel.
C_S2MM_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- S2MM (Write) Store and Forward function
-- 0 = Omit S2MM Store and Forward
-- 1 = Include S2MM Store and Forward
C_ENABLE_MULTI_CHANNEL : integer range 0 to 1 := 1;
C_ENABLE_EXTRA_FIELD : integer range 0 to 1 := 0;
C_FAMILY : String := "virtex7"
-- Specifies the target FPGA family type
);
port (
-- MM2S Primary Clock input ----------------------------------
m_axi_mm2s_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- MM2S Primary Reset input --
m_axi_mm2s_aresetn : in std_logic; --
-- Reset used for the internal master logic --
--------------------------------------------------------------
sg_ctl : in std_logic_vector (7 downto 0) ;
-- MM2S Halt request input control --------------------
mm2s_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- MM2S Halt Complete status flag --
mm2s_halt_cmplt : Out std_logic; --
-- Active high soft shutdown complete status --
-------------------------------------------------------
-- Error discrete output -------------------------
mm2s_err : Out std_logic; --
-- Composite Error indication --
--------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O ---------
m_axis_mm2s_cmdsts_aclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_mm2s_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) -------------------------------------------------
s_axis_mm2s_cmd_tvalid : in std_logic; --
s_axis_mm2s_cmd_tready : out std_logic; --
s_axis_mm2s_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_MM2S_ADDR_WIDTH+40)-1 downto 0); --
----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) ------------------------
m_axis_mm2s_sts_tvalid : out std_logic; --
m_axis_mm2s_sts_tready : in std_logic; --
m_axis_mm2s_sts_tdata : out std_logic_vector(7 downto 0); --
m_axis_mm2s_sts_tkeep : out std_logic_vector(0 downto 0); --
m_axis_mm2s_sts_tlast : out std_logic; --
--------------------------------------------------------------------
-- Address Posting contols -----------------------
mm2s_allow_addr_req : in std_logic; --
mm2s_addr_req_posted : out std_logic; --
mm2s_rd_xfer_cmplt : out std_logic; --
--------------------------------------------------
-- MM2S AXI Address Channel I/O --------------------------------------------------
m_axi_mm2s_arid : out std_logic_vector(C_M_AXI_MM2S_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_mm2s_araddr : out std_logic_vector(C_M_AXI_MM2S_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_mm2s_arlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_mm2s_arsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_mm2s_arburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_mm2s_arprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_mm2s_arcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_mm2s_aruser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_mm2s_arvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_mm2s_arready : in std_logic; --
-- AXI Address Channel READY input --
-----------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_mm2s_alock : out std_logic_vector(2 downto 0); --
-- m_axi_mm2s_acache : out std_logic_vector(4 downto 0); --
-- m_axi_mm2s_aqos : out std_logic_vector(3 downto 0); --
-- m_axi_mm2s_aregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- MM2S AXI MMap Read Data Channel I/O ------------------------------------------------
m_axi_mm2s_rdata : In std_logic_vector(C_M_AXI_MM2S_DATA_WIDTH-1 downto 0); --
m_axi_mm2s_rresp : In std_logic_vector(1 downto 0); --
m_axi_mm2s_rlast : In std_logic; --
m_axi_mm2s_rvalid : In std_logic; --
m_axi_mm2s_rready : Out std_logic; --
----------------------------------------------------------------------------------------
-- MM2S AXI Master Stream Channel I/O -------------------------------------------------------
m_axis_mm2s_tdata : Out std_logic_vector(C_M_AXIS_MM2S_TDATA_WIDTH-1 downto 0); --
m_axis_mm2s_tkeep : Out std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0); --
m_axis_mm2s_tlast : Out std_logic; --
m_axis_mm2s_tvalid : Out std_logic; --
m_axis_mm2s_tready : In std_logic; --
----------------------------------------------------------------------------------------------
-- Testing Support I/O --------------------------------------------------------
mm2s_dbg_sel : in std_logic_vector( 3 downto 0); --
mm2s_dbg_data : out std_logic_vector(31 downto 0) ; --
-------------------------------------------------------------------------------
-- S2MM Primary Clock input ---------------------------------
m_axi_s2mm_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- S2MM Primary Reset input --
m_axi_s2mm_aresetn : in std_logic; --
-- Reset used for the internal master logic --
-------------------------------------------------------------
-- S2MM Halt request input control ------------------
s2mm_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- S2MM Halt Complete status flag --
s2mm_halt_cmplt : out std_logic; --
-- Active high soft shutdown complete status --
-----------------------------------------------------
-- S2MM Error discrete output ------------------
s2mm_err : Out std_logic; --
-- Composite Error indication --
------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O -----------------
m_axis_s2mm_cmdsts_awclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_s2mm_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
--------------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) --------------------------------------------------
s_axis_s2mm_cmd_tvalid : in std_logic; --
s_axis_s2mm_cmd_tready : out std_logic; --
s_axis_s2mm_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_S2MM_ADDR_WIDTH+40)-1 downto 0); --
-----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) -----------------------------------------------------------
m_axis_s2mm_sts_tvalid : out std_logic; --
m_axis_s2mm_sts_tready : in std_logic; --
m_axis_s2mm_sts_tdata : out std_logic_vector(((C_S2MM_SUPPORT_INDET_BTT*24)+8)-1 downto 0); --
m_axis_s2mm_sts_tkeep : out std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0); --
m_axis_s2mm_sts_tlast : out std_logic; --
-------------------------------------------------------------------------------------------------------
-- Address posting controls -----------------------------------------
s2mm_allow_addr_req : in std_logic; --
s2mm_addr_req_posted : out std_logic; --
s2mm_wr_xfer_cmplt : out std_logic; --
s2mm_ld_nxt_len : out std_logic; --
s2mm_wr_len : out std_logic_vector(7 downto 0); --
---------------------------------------------------------------------
-- S2MM AXI Address Channel I/O ----------------------------------------------------
m_axi_s2mm_awid : out std_logic_vector(C_M_AXI_S2MM_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_s2mm_awaddr : out std_logic_vector(C_M_AXI_S2MM_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_s2mm_awlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_s2mm_awsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_s2mm_awburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_s2mm_awprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_s2mm_awcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_s2mm_awuser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_s2mm_awvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_s2mm_awready : in std_logic; --
-- AXI Address Channel READY input --
-------------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_s2mm__awlock : out std_logic_vector(2 downto 0); --
-- m_axi_s2mm__awcache : out std_logic_vector(4 downto 0); --
-- m_axi_s2mm__awqos : out std_logic_vector(3 downto 0); --
-- m_axi_s2mm__awregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- S2MM AXI MMap Write Data Channel I/O --------------------------------------------------
m_axi_s2mm_wdata : Out std_logic_vector(C_M_AXI_S2MM_DATA_WIDTH-1 downto 0); --
m_axi_s2mm_wstrb : Out std_logic_vector((C_M_AXI_S2MM_DATA_WIDTH/8)-1 downto 0); --
m_axi_s2mm_wlast : Out std_logic; --
m_axi_s2mm_wvalid : Out std_logic; --
m_axi_s2mm_wready : In std_logic; --
-------------------------------------------------------------------------------------------
-- S2MM AXI MMap Write response Channel I/O -------------------------
m_axi_s2mm_bresp : In std_logic_vector(1 downto 0); --
m_axi_s2mm_bvalid : In std_logic; --
m_axi_s2mm_bready : Out std_logic; --
----------------------------------------------------------------------
-- S2MM AXI Slave Stream Channel I/O -------------------------------------------------------
s_axis_s2mm_tdata : In std_logic_vector(C_S_AXIS_S2MM_TDATA_WIDTH-1 downto 0); --
s_axis_s2mm_tkeep : In std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0); --
s_axis_s2mm_tlast : In std_logic; --
s_axis_s2mm_tvalid : In std_logic; --
s_axis_s2mm_tready : Out std_logic; --
---------------------------------------------------------------------------------------------
-- Testing Support I/O ------------------------------------------------
s2mm_dbg_sel : in std_logic_vector( 3 downto 0); --
s2mm_dbg_data : out std_logic_vector(31 downto 0) --
------------------------------------------------------------------------
);
end entity axi_sg_datamover;
architecture implementation of axi_sg_datamover is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-- Function Declarations
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_clip_brst_len
--
-- Function Description:
-- This function is used to limit the parameterized max burst
-- databeats when the tranfer data width is 256 bits or greater.
-- This is required to keep from crossing the 4K byte xfer
-- boundary required by AXI. This process is further complicated
-- by the inclusion/omission of upsizers or downsizers in the
-- data path.
--
-------------------------------------------------------------------
function funct_clip_brst_len (param_burst_beats : integer;
mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
constant FCONST_SIZERS_ENABLED : boolean := (down_up_sizers_enabled > 0);
Variable fvar_max_burst_dbeats : Integer;
begin
-- coverage off
if (FCONST_SIZERS_ENABLED) then -- use MMap dwidth for calc
If (mmap_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (mmap_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (mmap_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit mmap width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
End if;
else -- use stream dwidth for calc
If (stream_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (stream_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (stream_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit stream width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
-- coverage on
End if;
end if;
Return (fvar_max_burst_dbeats);
end function funct_clip_brst_len;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_depth_16
--
-- Function Description:
-- This function is used to fix the Command and Status FIFO depths to
-- 16 entries when Async clocking mode is enabled. This is required
-- due to the way the async_fifo_fg.vhd design in proc_common is
-- implemented.
-------------------------------------------------------------------
function funct_fix_depth_16 (async_clocking_mode : integer;
requested_depth : integer) return integer is
Variable fvar_depth_2_use : Integer;
begin
-- coverage off
If (async_clocking_mode = 1) Then -- async mode so fix at 16
fvar_depth_2_use := 16;
Elsif (requested_depth > 16) Then -- limit at 16
fvar_depth_2_use := 16;
-- coverage on
Else -- use requested depth
fvar_depth_2_use := requested_depth;
End if;
Return (fvar_depth_2_use);
end function funct_fix_depth_16;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_min_btt_width
--
-- Function Description:
-- This function calculates the minimum required value
-- for the used width of the command BTT field.
--
-------------------------------------------------------------------
function funct_get_min_btt_width (max_burst_beats : integer;
bytes_per_beat : integer ) return integer is
Variable var_min_btt_needed : Integer;
Variable var_max_bytes_per_burst : Integer;
begin
var_max_bytes_per_burst := max_burst_beats*bytes_per_beat;
-- coverage off
if (var_max_bytes_per_burst <= 16) then
var_min_btt_needed := 5;
elsif (var_max_bytes_per_burst <= 32) then
var_min_btt_needed := 6;
-- coverage on
elsif (var_max_bytes_per_burst <= 64) then
var_min_btt_needed := 7;
-- coverage off
elsif (var_max_bytes_per_burst <= 128) then
var_min_btt_needed := 8;
elsif (var_max_bytes_per_burst <= 256) then
var_min_btt_needed := 9;
elsif (var_max_bytes_per_burst <= 512) then
var_min_btt_needed := 10;
elsif (var_max_bytes_per_burst <= 1024) then
var_min_btt_needed := 11;
elsif (var_max_bytes_per_burst <= 2048) then
var_min_btt_needed := 12;
elsif (var_max_bytes_per_burst <= 4096) then
var_min_btt_needed := 13;
else -- 8K byte range
var_min_btt_needed := 14;
end if;
-- coverage on
Return (var_min_btt_needed);
end function funct_get_min_btt_width;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_xfer_bytes_per_dbeat
--
-- Function Description:
-- Calculates the nuber of bytes that will transfered per databeat
-- on the AXI4 MMap Bus.
--
-------------------------------------------------------------------
function funct_get_xfer_bytes_per_dbeat (mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
Variable temp_bytes_per_dbeat : Integer := 4;
begin
-- coverage off
if (down_up_sizers_enabled > 0) then -- down/up sizers are in use, use full mmap dwidth
temp_bytes_per_dbeat := mmap_transfer_bit_width/8;
-- coverage on
else -- No down/up sizers so use Stream data width
temp_bytes_per_dbeat := stream_transfer_bit_width/8;
end if;
Return (temp_bytes_per_dbeat);
end function funct_get_xfer_bytes_per_dbeat;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_btt_used
--
-- Function Description:
-- THis function makes sure the BTT width used is at least the
-- minimum needed.
--
-------------------------------------------------------------------
function funct_fix_btt_used (requested_btt_width : integer;
min_btt_width : integer) return integer is
Variable var_corrected_btt_width : Integer;
begin
-- coverage off
If (requested_btt_width < min_btt_width) Then
var_corrected_btt_width := min_btt_width;
-- coverage on
else
var_corrected_btt_width := requested_btt_width;
End if;
Return (var_corrected_btt_width);
end function funct_fix_btt_used;
-------------------------------------------------------------------
-- Constant Declarations
-------------------------------------------------------------------
Constant MM2S_TAG_WIDTH : integer := 4;
Constant S2MM_TAG_WIDTH : integer := 4;
Constant MM2S_DOWNSIZER_ENABLED : integer := C_MM2S_INCLUDE_SF;
Constant S2MM_UPSIZER_ENABLED : integer := C_S2MM_INCLUDE_SF + C_S2MM_SUPPORT_INDET_BTT;
Constant MM2S_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_MM2S_BURST_SIZE,
C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant S2MM_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_S2MM_BURST_SIZE,
C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant MM2S_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_MM2S_STSCMD_IS_ASYNC,
C_MM2S_STSCMD_FIFO_DEPTH);
Constant S2MM_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_S2MM_STSCMD_IS_ASYNC,
C_S2MM_STSCMD_FIFO_DEPTH);
Constant MM2S_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant MM2S_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(MM2S_MAX_BURST_BEATS,
MM2S_BYTES_PER_BEAT);
Constant MM2S_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_MM2S_BTT_USED,
MM2S_MIN_BTT_NEEDED);
Constant S2MM_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant S2MM_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(S2MM_MAX_BURST_BEATS,
S2MM_BYTES_PER_BEAT);
Constant S2MM_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_S2MM_BTT_USED,
S2MM_MIN_BTT_NEEDED);
-- Signals
signal sig_mm2s_tstrb : std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_mm2s_sts_tstrb : std_logic_vector(0 downto 0) := (others => '0');
signal sig_s2mm_tstrb : std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_s2mm_sts_tstrb : std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0) := (others => '0');
begin --(architecture implementation)
-------------------------------------------------------------
-- Conversion to tkeep for external stream connnections
-------------------------------------------------------------
-- MM2S Stream Output
m_axis_mm2s_tkeep <= sig_mm2s_tstrb ;
-- MM2S Status Stream Output
m_axis_mm2s_sts_tkeep <= sig_mm2s_sts_tstrb ;
-- S2MM Stream Input
sig_s2mm_tstrb <= s_axis_s2mm_tkeep ;
-- S2MM Status Stream Output
m_axis_s2mm_sts_tkeep <= sig_s2mm_sts_tstrb ;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_MM2S_BASIC
--
-- If Generate Description:
-- Instantiate the MM2S Basic Wrapper
--
--
------------------------------------------------------------
GEN_MM2S_BASIC : if (C_INCLUDE_MM2S = 2) generate
begin
------------------------------------------------------------
-- Instance: I_MM2S_BASIC_WRAPPER
--
-- Description:
-- Read Basic Wrapper Instance
--
------------------------------------------------------------
I_MM2S_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_mm2s_basic_wrap
generic map (
C_INCLUDE_MM2S => C_INCLUDE_MM2S ,
C_MM2S_ARID => C_M_AXI_MM2S_ARID ,
C_MM2S_ID_WIDTH => C_M_AXI_MM2S_ID_WIDTH ,
C_MM2S_ADDR_WIDTH => C_M_AXI_MM2S_ADDR_WIDTH ,
C_MM2S_MDATA_WIDTH => C_M_AXI_MM2S_DATA_WIDTH ,
C_MM2S_SDATA_WIDTH => C_M_AXIS_MM2S_TDATA_WIDTH ,
C_INCLUDE_MM2S_STSFIFO => C_INCLUDE_MM2S_STSFIFO ,
C_MM2S_STSCMD_FIFO_DEPTH => MM2S_CMDSTS_FIFO_DEPTH ,
C_MM2S_STSCMD_IS_ASYNC => C_MM2S_STSCMD_IS_ASYNC ,
C_INCLUDE_MM2S_DRE => C_INCLUDE_MM2S_DRE ,
C_MM2S_BURST_SIZE => MM2S_MAX_BURST_BEATS ,
C_MM2S_BTT_USED => MM2S_CORRECTED_BTT_USED ,
C_MM2S_ADDR_PIPE_DEPTH => C_MM2S_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => MM2S_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
mm2s_aclk => m_axi_mm2s_aclk ,
mm2s_aresetn => m_axi_mm2s_aresetn ,
sg_ctl => sg_ctl ,
mm2s_halt => mm2s_halt ,
mm2s_halt_cmplt => mm2s_halt_cmplt ,
mm2s_err => mm2s_err ,
mm2s_cmdsts_awclk => m_axis_mm2s_cmdsts_aclk ,
mm2s_cmdsts_aresetn => m_axis_mm2s_cmdsts_aresetn ,
mm2s_cmd_wvalid => s_axis_mm2s_cmd_tvalid ,
mm2s_cmd_wready => s_axis_mm2s_cmd_tready ,
mm2s_cmd_wdata => s_axis_mm2s_cmd_tdata ,
mm2s_sts_wvalid => m_axis_mm2s_sts_tvalid ,
mm2s_sts_wready => m_axis_mm2s_sts_tready ,
mm2s_sts_wdata => m_axis_mm2s_sts_tdata ,
mm2s_sts_wstrb => sig_mm2s_sts_tstrb ,
mm2s_sts_wlast => m_axis_mm2s_sts_tlast ,
mm2s_allow_addr_req => mm2s_allow_addr_req ,
mm2s_addr_req_posted => mm2s_addr_req_posted ,
mm2s_rd_xfer_cmplt => mm2s_rd_xfer_cmplt ,
mm2s_arid => m_axi_mm2s_arid ,
mm2s_araddr => m_axi_mm2s_araddr ,
mm2s_arlen => m_axi_mm2s_arlen ,
mm2s_arsize => m_axi_mm2s_arsize ,
mm2s_arburst => m_axi_mm2s_arburst ,
mm2s_arprot => m_axi_mm2s_arprot ,
mm2s_arcache => m_axi_mm2s_arcache ,
mm2s_aruser => m_axi_mm2s_aruser ,
mm2s_arvalid => m_axi_mm2s_arvalid ,
mm2s_arready => m_axi_mm2s_arready ,
mm2s_rdata => m_axi_mm2s_rdata ,
mm2s_rresp => m_axi_mm2s_rresp ,
mm2s_rlast => m_axi_mm2s_rlast ,
mm2s_rvalid => m_axi_mm2s_rvalid ,
mm2s_rready => m_axi_mm2s_rready ,
mm2s_strm_wdata => m_axis_mm2s_tdata ,
mm2s_strm_wstrb => sig_mm2s_tstrb ,
mm2s_strm_wlast => m_axis_mm2s_tlast ,
mm2s_strm_wvalid => m_axis_mm2s_tvalid ,
mm2s_strm_wready => m_axis_mm2s_tready ,
mm2s_dbg_sel => mm2s_dbg_sel ,
mm2s_dbg_data => mm2s_dbg_data
);
end generate GEN_MM2S_BASIC;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_S2MM_BASIC
--
-- If Generate Description:
-- Instantiate the S2MM Basic Wrapper
--
--
------------------------------------------------------------
GEN_S2MM_BASIC : if (C_INCLUDE_S2MM = 2) generate
begin
------------------------------------------------------------
-- Instance: I_S2MM_BASIC_WRAPPER
--
-- Description:
-- Write Basic Wrapper Instance
--
------------------------------------------------------------
I_S2MM_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_s2mm_basic_wrap
generic map (
C_INCLUDE_S2MM => C_INCLUDE_S2MM ,
C_S2MM_AWID => C_M_AXI_S2MM_AWID ,
C_S2MM_ID_WIDTH => C_M_AXI_S2MM_ID_WIDTH ,
C_S2MM_ADDR_WIDTH => C_M_AXI_S2MM_ADDR_WIDTH ,
C_S2MM_MDATA_WIDTH => C_M_AXI_S2MM_DATA_WIDTH ,
C_S2MM_SDATA_WIDTH => C_S_AXIS_S2MM_TDATA_WIDTH ,
C_INCLUDE_S2MM_STSFIFO => C_INCLUDE_S2MM_STSFIFO ,
C_S2MM_STSCMD_FIFO_DEPTH => S2MM_CMDSTS_FIFO_DEPTH ,
C_S2MM_STSCMD_IS_ASYNC => C_S2MM_STSCMD_IS_ASYNC ,
C_INCLUDE_S2MM_DRE => C_INCLUDE_S2MM_DRE ,
C_S2MM_BURST_SIZE => S2MM_MAX_BURST_BEATS ,
C_S2MM_ADDR_PIPE_DEPTH => C_S2MM_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => S2MM_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
s2mm_aclk => m_axi_s2mm_aclk ,
s2mm_aresetn => m_axi_s2mm_aresetn ,
sg_ctl => sg_ctl ,
s2mm_halt => s2mm_halt ,
s2mm_halt_cmplt => s2mm_halt_cmplt ,
s2mm_err => s2mm_err ,
s2mm_cmdsts_awclk => m_axis_s2mm_cmdsts_awclk ,
s2mm_cmdsts_aresetn => m_axis_s2mm_cmdsts_aresetn ,
s2mm_cmd_wvalid => s_axis_s2mm_cmd_tvalid ,
s2mm_cmd_wready => s_axis_s2mm_cmd_tready ,
s2mm_cmd_wdata => s_axis_s2mm_cmd_tdata ,
s2mm_sts_wvalid => m_axis_s2mm_sts_tvalid ,
s2mm_sts_wready => m_axis_s2mm_sts_tready ,
s2mm_sts_wdata => m_axis_s2mm_sts_tdata ,
s2mm_sts_wstrb => sig_s2mm_sts_tstrb ,
s2mm_sts_wlast => m_axis_s2mm_sts_tlast ,
s2mm_allow_addr_req => s2mm_allow_addr_req ,
s2mm_addr_req_posted => s2mm_addr_req_posted ,
s2mm_wr_xfer_cmplt => s2mm_wr_xfer_cmplt ,
s2mm_ld_nxt_len => s2mm_ld_nxt_len ,
s2mm_wr_len => s2mm_wr_len ,
s2mm_awid => m_axi_s2mm_awid ,
s2mm_awaddr => m_axi_s2mm_awaddr ,
s2mm_awlen => m_axi_s2mm_awlen ,
s2mm_awsize => m_axi_s2mm_awsize ,
s2mm_awburst => m_axi_s2mm_awburst ,
s2mm_awprot => m_axi_s2mm_awprot ,
s2mm_awcache => m_axi_s2mm_awcache ,
s2mm_awuser => m_axi_s2mm_awuser ,
s2mm_awvalid => m_axi_s2mm_awvalid ,
s2mm_awready => m_axi_s2mm_awready ,
s2mm_wdata => m_axi_s2mm_wdata ,
s2mm_wstrb => m_axi_s2mm_wstrb ,
s2mm_wlast => m_axi_s2mm_wlast ,
s2mm_wvalid => m_axi_s2mm_wvalid ,
s2mm_wready => m_axi_s2mm_wready ,
s2mm_bresp => m_axi_s2mm_bresp ,
s2mm_bvalid => m_axi_s2mm_bvalid ,
s2mm_bready => m_axi_s2mm_bready ,
s2mm_strm_wdata => s_axis_s2mm_tdata ,
s2mm_strm_wstrb => sig_s2mm_tstrb ,
s2mm_strm_wlast => s_axis_s2mm_tlast ,
s2mm_strm_wvalid => s_axis_s2mm_tvalid ,
s2mm_strm_wready => s_axis_s2mm_tready ,
s2mm_dbg_sel => s2mm_dbg_sel ,
s2mm_dbg_data => s2mm_dbg_data
);
end generate GEN_S2MM_BASIC;
end implementation;
|
-- *************************************************************************
--
-- (c) Copyright 2010-2011 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- *************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: axi_sg.vhd
--
-- Description:
-- Top level VHDL wrapper for the AXI DataMover
--
--
--
--
-- VHDL-Standard: VHDL'93
-------------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
library axi_sg_v4_1;
use axi_sg_v4_1.axi_sg_mm2s_basic_wrap;
use axi_sg_v4_1.axi_sg_s2mm_basic_wrap;
-------------------------------------------------------------------------------
entity axi_sg_datamover is
generic (
C_INCLUDE_MM2S : Integer range 0 to 2 := 2;
-- Specifies the type of MM2S function to include
-- 0 = Omit MM2S functionality
-- 1 = Full MM2S Functionality
-- 2 = Basic MM2S functionality
C_M_AXI_MM2S_ARID : Integer range 0 to 255 := 0;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_MM2S_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the MM2S ID port
C_M_AXI_MM2S_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_MM2S_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_M_AXIS_MM2S_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the MM2S Master Stream Data
-- Channel data bus
C_INCLUDE_MM2S_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit MM2S Status FIFO
-- 1 = Include MM2S Status FIFO
C_MM2S_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the MM2S Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_MM2S_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_MM2S_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the MM2S function
-- 0 = Omit DRE
-- 1 = Include DRE
C_MM2S_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the MM2S function
C_MM2S_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the MM2S Command Interface
C_MM2S_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the MM2S internal
-- child command queues in the Read Address Controller and
-- the Read Data Controller. Increasing this value will
-- allow more Read Addresses to be issued to the AXI4 Read
-- Address Channel before receipt of the associated read
-- data on the Read Data Channel.
C_MM2S_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- MM2S (Read) Store and Forward function
-- 0 = Omit MM2S Store and Forward
-- 1 = Include MM2S Store and Forward
C_INCLUDE_S2MM : Integer range 0 to 4 := 2;
-- Specifies the type of S2MM function to include
-- 0 = Omit S2MM functionality
-- 1 = Full S2MM Functionality
-- 2 = Basic S2MM functionality
C_M_AXI_S2MM_AWID : Integer range 0 to 255 := 1;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_S2MM_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the S2MM ID port
C_M_AXI_S2MM_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_S2MM_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_S_AXIS_S2MM_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the S2MM Master Stream Data
-- Channel data bus
C_INCLUDE_S2MM_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit S2MM Status FIFO
-- 1 = Include S2MM Status FIFO
C_S2MM_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the S2MM Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_S2MM_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_S2MM_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the S2MM function
-- 0 = Omit DRE
-- 1 = Include DRE
C_S2MM_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the S2MM function
C_S2MM_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the S2MM Command Interface
C_S2MM_SUPPORT_INDET_BTT : Integer range 0 to 1 := 0;
-- Specifies if support for indeterminate packet lengths
-- are to be received on the input Stream interface
-- 0 = Omit support (User MUST transfer the exact number of
-- bytes on the Stream interface as specified in the BTT
-- field of the Corresponding DataMover Command)
-- 1 = Include support for indeterminate packet lengths
-- This causes FIFOs to be added and "Store and Forward"
-- behavior of the S2MM function
C_S2MM_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the S2MM internal
-- address pipeline queues in the Write Address Controller
-- and the Write Data Controller. Increasing this value will
-- allow more Write Addresses to be issued to the AXI4 Write
-- Address Channel before transmission of the associated
-- write data on the Write Data Channel.
C_S2MM_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- S2MM (Write) Store and Forward function
-- 0 = Omit S2MM Store and Forward
-- 1 = Include S2MM Store and Forward
C_ENABLE_MULTI_CHANNEL : integer range 0 to 1 := 1;
C_ENABLE_EXTRA_FIELD : integer range 0 to 1 := 0;
C_FAMILY : String := "virtex7"
-- Specifies the target FPGA family type
);
port (
-- MM2S Primary Clock input ----------------------------------
m_axi_mm2s_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- MM2S Primary Reset input --
m_axi_mm2s_aresetn : in std_logic; --
-- Reset used for the internal master logic --
--------------------------------------------------------------
sg_ctl : in std_logic_vector (7 downto 0) ;
-- MM2S Halt request input control --------------------
mm2s_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- MM2S Halt Complete status flag --
mm2s_halt_cmplt : Out std_logic; --
-- Active high soft shutdown complete status --
-------------------------------------------------------
-- Error discrete output -------------------------
mm2s_err : Out std_logic; --
-- Composite Error indication --
--------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O ---------
m_axis_mm2s_cmdsts_aclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_mm2s_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) -------------------------------------------------
s_axis_mm2s_cmd_tvalid : in std_logic; --
s_axis_mm2s_cmd_tready : out std_logic; --
s_axis_mm2s_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_MM2S_ADDR_WIDTH+40)-1 downto 0); --
----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) ------------------------
m_axis_mm2s_sts_tvalid : out std_logic; --
m_axis_mm2s_sts_tready : in std_logic; --
m_axis_mm2s_sts_tdata : out std_logic_vector(7 downto 0); --
m_axis_mm2s_sts_tkeep : out std_logic_vector(0 downto 0); --
m_axis_mm2s_sts_tlast : out std_logic; --
--------------------------------------------------------------------
-- Address Posting contols -----------------------
mm2s_allow_addr_req : in std_logic; --
mm2s_addr_req_posted : out std_logic; --
mm2s_rd_xfer_cmplt : out std_logic; --
--------------------------------------------------
-- MM2S AXI Address Channel I/O --------------------------------------------------
m_axi_mm2s_arid : out std_logic_vector(C_M_AXI_MM2S_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_mm2s_araddr : out std_logic_vector(C_M_AXI_MM2S_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_mm2s_arlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_mm2s_arsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_mm2s_arburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_mm2s_arprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_mm2s_arcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_mm2s_aruser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_mm2s_arvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_mm2s_arready : in std_logic; --
-- AXI Address Channel READY input --
-----------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_mm2s_alock : out std_logic_vector(2 downto 0); --
-- m_axi_mm2s_acache : out std_logic_vector(4 downto 0); --
-- m_axi_mm2s_aqos : out std_logic_vector(3 downto 0); --
-- m_axi_mm2s_aregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- MM2S AXI MMap Read Data Channel I/O ------------------------------------------------
m_axi_mm2s_rdata : In std_logic_vector(C_M_AXI_MM2S_DATA_WIDTH-1 downto 0); --
m_axi_mm2s_rresp : In std_logic_vector(1 downto 0); --
m_axi_mm2s_rlast : In std_logic; --
m_axi_mm2s_rvalid : In std_logic; --
m_axi_mm2s_rready : Out std_logic; --
----------------------------------------------------------------------------------------
-- MM2S AXI Master Stream Channel I/O -------------------------------------------------------
m_axis_mm2s_tdata : Out std_logic_vector(C_M_AXIS_MM2S_TDATA_WIDTH-1 downto 0); --
m_axis_mm2s_tkeep : Out std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0); --
m_axis_mm2s_tlast : Out std_logic; --
m_axis_mm2s_tvalid : Out std_logic; --
m_axis_mm2s_tready : In std_logic; --
----------------------------------------------------------------------------------------------
-- Testing Support I/O --------------------------------------------------------
mm2s_dbg_sel : in std_logic_vector( 3 downto 0); --
mm2s_dbg_data : out std_logic_vector(31 downto 0) ; --
-------------------------------------------------------------------------------
-- S2MM Primary Clock input ---------------------------------
m_axi_s2mm_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- S2MM Primary Reset input --
m_axi_s2mm_aresetn : in std_logic; --
-- Reset used for the internal master logic --
-------------------------------------------------------------
-- S2MM Halt request input control ------------------
s2mm_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- S2MM Halt Complete status flag --
s2mm_halt_cmplt : out std_logic; --
-- Active high soft shutdown complete status --
-----------------------------------------------------
-- S2MM Error discrete output ------------------
s2mm_err : Out std_logic; --
-- Composite Error indication --
------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O -----------------
m_axis_s2mm_cmdsts_awclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_s2mm_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
--------------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) --------------------------------------------------
s_axis_s2mm_cmd_tvalid : in std_logic; --
s_axis_s2mm_cmd_tready : out std_logic; --
s_axis_s2mm_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_S2MM_ADDR_WIDTH+40)-1 downto 0); --
-----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) -----------------------------------------------------------
m_axis_s2mm_sts_tvalid : out std_logic; --
m_axis_s2mm_sts_tready : in std_logic; --
m_axis_s2mm_sts_tdata : out std_logic_vector(((C_S2MM_SUPPORT_INDET_BTT*24)+8)-1 downto 0); --
m_axis_s2mm_sts_tkeep : out std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0); --
m_axis_s2mm_sts_tlast : out std_logic; --
-------------------------------------------------------------------------------------------------------
-- Address posting controls -----------------------------------------
s2mm_allow_addr_req : in std_logic; --
s2mm_addr_req_posted : out std_logic; --
s2mm_wr_xfer_cmplt : out std_logic; --
s2mm_ld_nxt_len : out std_logic; --
s2mm_wr_len : out std_logic_vector(7 downto 0); --
---------------------------------------------------------------------
-- S2MM AXI Address Channel I/O ----------------------------------------------------
m_axi_s2mm_awid : out std_logic_vector(C_M_AXI_S2MM_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_s2mm_awaddr : out std_logic_vector(C_M_AXI_S2MM_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_s2mm_awlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_s2mm_awsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_s2mm_awburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_s2mm_awprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_s2mm_awcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_s2mm_awuser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_s2mm_awvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_s2mm_awready : in std_logic; --
-- AXI Address Channel READY input --
-------------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_s2mm__awlock : out std_logic_vector(2 downto 0); --
-- m_axi_s2mm__awcache : out std_logic_vector(4 downto 0); --
-- m_axi_s2mm__awqos : out std_logic_vector(3 downto 0); --
-- m_axi_s2mm__awregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- S2MM AXI MMap Write Data Channel I/O --------------------------------------------------
m_axi_s2mm_wdata : Out std_logic_vector(C_M_AXI_S2MM_DATA_WIDTH-1 downto 0); --
m_axi_s2mm_wstrb : Out std_logic_vector((C_M_AXI_S2MM_DATA_WIDTH/8)-1 downto 0); --
m_axi_s2mm_wlast : Out std_logic; --
m_axi_s2mm_wvalid : Out std_logic; --
m_axi_s2mm_wready : In std_logic; --
-------------------------------------------------------------------------------------------
-- S2MM AXI MMap Write response Channel I/O -------------------------
m_axi_s2mm_bresp : In std_logic_vector(1 downto 0); --
m_axi_s2mm_bvalid : In std_logic; --
m_axi_s2mm_bready : Out std_logic; --
----------------------------------------------------------------------
-- S2MM AXI Slave Stream Channel I/O -------------------------------------------------------
s_axis_s2mm_tdata : In std_logic_vector(C_S_AXIS_S2MM_TDATA_WIDTH-1 downto 0); --
s_axis_s2mm_tkeep : In std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0); --
s_axis_s2mm_tlast : In std_logic; --
s_axis_s2mm_tvalid : In std_logic; --
s_axis_s2mm_tready : Out std_logic; --
---------------------------------------------------------------------------------------------
-- Testing Support I/O ------------------------------------------------
s2mm_dbg_sel : in std_logic_vector( 3 downto 0); --
s2mm_dbg_data : out std_logic_vector(31 downto 0) --
------------------------------------------------------------------------
);
end entity axi_sg_datamover;
architecture implementation of axi_sg_datamover is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-- Function Declarations
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_clip_brst_len
--
-- Function Description:
-- This function is used to limit the parameterized max burst
-- databeats when the tranfer data width is 256 bits or greater.
-- This is required to keep from crossing the 4K byte xfer
-- boundary required by AXI. This process is further complicated
-- by the inclusion/omission of upsizers or downsizers in the
-- data path.
--
-------------------------------------------------------------------
function funct_clip_brst_len (param_burst_beats : integer;
mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
constant FCONST_SIZERS_ENABLED : boolean := (down_up_sizers_enabled > 0);
Variable fvar_max_burst_dbeats : Integer;
begin
-- coverage off
if (FCONST_SIZERS_ENABLED) then -- use MMap dwidth for calc
If (mmap_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (mmap_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (mmap_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit mmap width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
End if;
else -- use stream dwidth for calc
If (stream_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (stream_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (stream_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit stream width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
-- coverage on
End if;
end if;
Return (fvar_max_burst_dbeats);
end function funct_clip_brst_len;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_depth_16
--
-- Function Description:
-- This function is used to fix the Command and Status FIFO depths to
-- 16 entries when Async clocking mode is enabled. This is required
-- due to the way the async_fifo_fg.vhd design in proc_common is
-- implemented.
-------------------------------------------------------------------
function funct_fix_depth_16 (async_clocking_mode : integer;
requested_depth : integer) return integer is
Variable fvar_depth_2_use : Integer;
begin
-- coverage off
If (async_clocking_mode = 1) Then -- async mode so fix at 16
fvar_depth_2_use := 16;
Elsif (requested_depth > 16) Then -- limit at 16
fvar_depth_2_use := 16;
-- coverage on
Else -- use requested depth
fvar_depth_2_use := requested_depth;
End if;
Return (fvar_depth_2_use);
end function funct_fix_depth_16;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_min_btt_width
--
-- Function Description:
-- This function calculates the minimum required value
-- for the used width of the command BTT field.
--
-------------------------------------------------------------------
function funct_get_min_btt_width (max_burst_beats : integer;
bytes_per_beat : integer ) return integer is
Variable var_min_btt_needed : Integer;
Variable var_max_bytes_per_burst : Integer;
begin
var_max_bytes_per_burst := max_burst_beats*bytes_per_beat;
-- coverage off
if (var_max_bytes_per_burst <= 16) then
var_min_btt_needed := 5;
elsif (var_max_bytes_per_burst <= 32) then
var_min_btt_needed := 6;
-- coverage on
elsif (var_max_bytes_per_burst <= 64) then
var_min_btt_needed := 7;
-- coverage off
elsif (var_max_bytes_per_burst <= 128) then
var_min_btt_needed := 8;
elsif (var_max_bytes_per_burst <= 256) then
var_min_btt_needed := 9;
elsif (var_max_bytes_per_burst <= 512) then
var_min_btt_needed := 10;
elsif (var_max_bytes_per_burst <= 1024) then
var_min_btt_needed := 11;
elsif (var_max_bytes_per_burst <= 2048) then
var_min_btt_needed := 12;
elsif (var_max_bytes_per_burst <= 4096) then
var_min_btt_needed := 13;
else -- 8K byte range
var_min_btt_needed := 14;
end if;
-- coverage on
Return (var_min_btt_needed);
end function funct_get_min_btt_width;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_xfer_bytes_per_dbeat
--
-- Function Description:
-- Calculates the nuber of bytes that will transfered per databeat
-- on the AXI4 MMap Bus.
--
-------------------------------------------------------------------
function funct_get_xfer_bytes_per_dbeat (mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
Variable temp_bytes_per_dbeat : Integer := 4;
begin
-- coverage off
if (down_up_sizers_enabled > 0) then -- down/up sizers are in use, use full mmap dwidth
temp_bytes_per_dbeat := mmap_transfer_bit_width/8;
-- coverage on
else -- No down/up sizers so use Stream data width
temp_bytes_per_dbeat := stream_transfer_bit_width/8;
end if;
Return (temp_bytes_per_dbeat);
end function funct_get_xfer_bytes_per_dbeat;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_btt_used
--
-- Function Description:
-- THis function makes sure the BTT width used is at least the
-- minimum needed.
--
-------------------------------------------------------------------
function funct_fix_btt_used (requested_btt_width : integer;
min_btt_width : integer) return integer is
Variable var_corrected_btt_width : Integer;
begin
-- coverage off
If (requested_btt_width < min_btt_width) Then
var_corrected_btt_width := min_btt_width;
-- coverage on
else
var_corrected_btt_width := requested_btt_width;
End if;
Return (var_corrected_btt_width);
end function funct_fix_btt_used;
-------------------------------------------------------------------
-- Constant Declarations
-------------------------------------------------------------------
Constant MM2S_TAG_WIDTH : integer := 4;
Constant S2MM_TAG_WIDTH : integer := 4;
Constant MM2S_DOWNSIZER_ENABLED : integer := C_MM2S_INCLUDE_SF;
Constant S2MM_UPSIZER_ENABLED : integer := C_S2MM_INCLUDE_SF + C_S2MM_SUPPORT_INDET_BTT;
Constant MM2S_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_MM2S_BURST_SIZE,
C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant S2MM_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_S2MM_BURST_SIZE,
C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant MM2S_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_MM2S_STSCMD_IS_ASYNC,
C_MM2S_STSCMD_FIFO_DEPTH);
Constant S2MM_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_S2MM_STSCMD_IS_ASYNC,
C_S2MM_STSCMD_FIFO_DEPTH);
Constant MM2S_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant MM2S_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(MM2S_MAX_BURST_BEATS,
MM2S_BYTES_PER_BEAT);
Constant MM2S_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_MM2S_BTT_USED,
MM2S_MIN_BTT_NEEDED);
Constant S2MM_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant S2MM_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(S2MM_MAX_BURST_BEATS,
S2MM_BYTES_PER_BEAT);
Constant S2MM_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_S2MM_BTT_USED,
S2MM_MIN_BTT_NEEDED);
-- Signals
signal sig_mm2s_tstrb : std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_mm2s_sts_tstrb : std_logic_vector(0 downto 0) := (others => '0');
signal sig_s2mm_tstrb : std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_s2mm_sts_tstrb : std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0) := (others => '0');
begin --(architecture implementation)
-------------------------------------------------------------
-- Conversion to tkeep for external stream connnections
-------------------------------------------------------------
-- MM2S Stream Output
m_axis_mm2s_tkeep <= sig_mm2s_tstrb ;
-- MM2S Status Stream Output
m_axis_mm2s_sts_tkeep <= sig_mm2s_sts_tstrb ;
-- S2MM Stream Input
sig_s2mm_tstrb <= s_axis_s2mm_tkeep ;
-- S2MM Status Stream Output
m_axis_s2mm_sts_tkeep <= sig_s2mm_sts_tstrb ;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_MM2S_BASIC
--
-- If Generate Description:
-- Instantiate the MM2S Basic Wrapper
--
--
------------------------------------------------------------
GEN_MM2S_BASIC : if (C_INCLUDE_MM2S = 2) generate
begin
------------------------------------------------------------
-- Instance: I_MM2S_BASIC_WRAPPER
--
-- Description:
-- Read Basic Wrapper Instance
--
------------------------------------------------------------
I_MM2S_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_mm2s_basic_wrap
generic map (
C_INCLUDE_MM2S => C_INCLUDE_MM2S ,
C_MM2S_ARID => C_M_AXI_MM2S_ARID ,
C_MM2S_ID_WIDTH => C_M_AXI_MM2S_ID_WIDTH ,
C_MM2S_ADDR_WIDTH => C_M_AXI_MM2S_ADDR_WIDTH ,
C_MM2S_MDATA_WIDTH => C_M_AXI_MM2S_DATA_WIDTH ,
C_MM2S_SDATA_WIDTH => C_M_AXIS_MM2S_TDATA_WIDTH ,
C_INCLUDE_MM2S_STSFIFO => C_INCLUDE_MM2S_STSFIFO ,
C_MM2S_STSCMD_FIFO_DEPTH => MM2S_CMDSTS_FIFO_DEPTH ,
C_MM2S_STSCMD_IS_ASYNC => C_MM2S_STSCMD_IS_ASYNC ,
C_INCLUDE_MM2S_DRE => C_INCLUDE_MM2S_DRE ,
C_MM2S_BURST_SIZE => MM2S_MAX_BURST_BEATS ,
C_MM2S_BTT_USED => MM2S_CORRECTED_BTT_USED ,
C_MM2S_ADDR_PIPE_DEPTH => C_MM2S_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => MM2S_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
mm2s_aclk => m_axi_mm2s_aclk ,
mm2s_aresetn => m_axi_mm2s_aresetn ,
sg_ctl => sg_ctl ,
mm2s_halt => mm2s_halt ,
mm2s_halt_cmplt => mm2s_halt_cmplt ,
mm2s_err => mm2s_err ,
mm2s_cmdsts_awclk => m_axis_mm2s_cmdsts_aclk ,
mm2s_cmdsts_aresetn => m_axis_mm2s_cmdsts_aresetn ,
mm2s_cmd_wvalid => s_axis_mm2s_cmd_tvalid ,
mm2s_cmd_wready => s_axis_mm2s_cmd_tready ,
mm2s_cmd_wdata => s_axis_mm2s_cmd_tdata ,
mm2s_sts_wvalid => m_axis_mm2s_sts_tvalid ,
mm2s_sts_wready => m_axis_mm2s_sts_tready ,
mm2s_sts_wdata => m_axis_mm2s_sts_tdata ,
mm2s_sts_wstrb => sig_mm2s_sts_tstrb ,
mm2s_sts_wlast => m_axis_mm2s_sts_tlast ,
mm2s_allow_addr_req => mm2s_allow_addr_req ,
mm2s_addr_req_posted => mm2s_addr_req_posted ,
mm2s_rd_xfer_cmplt => mm2s_rd_xfer_cmplt ,
mm2s_arid => m_axi_mm2s_arid ,
mm2s_araddr => m_axi_mm2s_araddr ,
mm2s_arlen => m_axi_mm2s_arlen ,
mm2s_arsize => m_axi_mm2s_arsize ,
mm2s_arburst => m_axi_mm2s_arburst ,
mm2s_arprot => m_axi_mm2s_arprot ,
mm2s_arcache => m_axi_mm2s_arcache ,
mm2s_aruser => m_axi_mm2s_aruser ,
mm2s_arvalid => m_axi_mm2s_arvalid ,
mm2s_arready => m_axi_mm2s_arready ,
mm2s_rdata => m_axi_mm2s_rdata ,
mm2s_rresp => m_axi_mm2s_rresp ,
mm2s_rlast => m_axi_mm2s_rlast ,
mm2s_rvalid => m_axi_mm2s_rvalid ,
mm2s_rready => m_axi_mm2s_rready ,
mm2s_strm_wdata => m_axis_mm2s_tdata ,
mm2s_strm_wstrb => sig_mm2s_tstrb ,
mm2s_strm_wlast => m_axis_mm2s_tlast ,
mm2s_strm_wvalid => m_axis_mm2s_tvalid ,
mm2s_strm_wready => m_axis_mm2s_tready ,
mm2s_dbg_sel => mm2s_dbg_sel ,
mm2s_dbg_data => mm2s_dbg_data
);
end generate GEN_MM2S_BASIC;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_S2MM_BASIC
--
-- If Generate Description:
-- Instantiate the S2MM Basic Wrapper
--
--
------------------------------------------------------------
GEN_S2MM_BASIC : if (C_INCLUDE_S2MM = 2) generate
begin
------------------------------------------------------------
-- Instance: I_S2MM_BASIC_WRAPPER
--
-- Description:
-- Write Basic Wrapper Instance
--
------------------------------------------------------------
I_S2MM_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_s2mm_basic_wrap
generic map (
C_INCLUDE_S2MM => C_INCLUDE_S2MM ,
C_S2MM_AWID => C_M_AXI_S2MM_AWID ,
C_S2MM_ID_WIDTH => C_M_AXI_S2MM_ID_WIDTH ,
C_S2MM_ADDR_WIDTH => C_M_AXI_S2MM_ADDR_WIDTH ,
C_S2MM_MDATA_WIDTH => C_M_AXI_S2MM_DATA_WIDTH ,
C_S2MM_SDATA_WIDTH => C_S_AXIS_S2MM_TDATA_WIDTH ,
C_INCLUDE_S2MM_STSFIFO => C_INCLUDE_S2MM_STSFIFO ,
C_S2MM_STSCMD_FIFO_DEPTH => S2MM_CMDSTS_FIFO_DEPTH ,
C_S2MM_STSCMD_IS_ASYNC => C_S2MM_STSCMD_IS_ASYNC ,
C_INCLUDE_S2MM_DRE => C_INCLUDE_S2MM_DRE ,
C_S2MM_BURST_SIZE => S2MM_MAX_BURST_BEATS ,
C_S2MM_ADDR_PIPE_DEPTH => C_S2MM_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => S2MM_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
s2mm_aclk => m_axi_s2mm_aclk ,
s2mm_aresetn => m_axi_s2mm_aresetn ,
sg_ctl => sg_ctl ,
s2mm_halt => s2mm_halt ,
s2mm_halt_cmplt => s2mm_halt_cmplt ,
s2mm_err => s2mm_err ,
s2mm_cmdsts_awclk => m_axis_s2mm_cmdsts_awclk ,
s2mm_cmdsts_aresetn => m_axis_s2mm_cmdsts_aresetn ,
s2mm_cmd_wvalid => s_axis_s2mm_cmd_tvalid ,
s2mm_cmd_wready => s_axis_s2mm_cmd_tready ,
s2mm_cmd_wdata => s_axis_s2mm_cmd_tdata ,
s2mm_sts_wvalid => m_axis_s2mm_sts_tvalid ,
s2mm_sts_wready => m_axis_s2mm_sts_tready ,
s2mm_sts_wdata => m_axis_s2mm_sts_tdata ,
s2mm_sts_wstrb => sig_s2mm_sts_tstrb ,
s2mm_sts_wlast => m_axis_s2mm_sts_tlast ,
s2mm_allow_addr_req => s2mm_allow_addr_req ,
s2mm_addr_req_posted => s2mm_addr_req_posted ,
s2mm_wr_xfer_cmplt => s2mm_wr_xfer_cmplt ,
s2mm_ld_nxt_len => s2mm_ld_nxt_len ,
s2mm_wr_len => s2mm_wr_len ,
s2mm_awid => m_axi_s2mm_awid ,
s2mm_awaddr => m_axi_s2mm_awaddr ,
s2mm_awlen => m_axi_s2mm_awlen ,
s2mm_awsize => m_axi_s2mm_awsize ,
s2mm_awburst => m_axi_s2mm_awburst ,
s2mm_awprot => m_axi_s2mm_awprot ,
s2mm_awcache => m_axi_s2mm_awcache ,
s2mm_awuser => m_axi_s2mm_awuser ,
s2mm_awvalid => m_axi_s2mm_awvalid ,
s2mm_awready => m_axi_s2mm_awready ,
s2mm_wdata => m_axi_s2mm_wdata ,
s2mm_wstrb => m_axi_s2mm_wstrb ,
s2mm_wlast => m_axi_s2mm_wlast ,
s2mm_wvalid => m_axi_s2mm_wvalid ,
s2mm_wready => m_axi_s2mm_wready ,
s2mm_bresp => m_axi_s2mm_bresp ,
s2mm_bvalid => m_axi_s2mm_bvalid ,
s2mm_bready => m_axi_s2mm_bready ,
s2mm_strm_wdata => s_axis_s2mm_tdata ,
s2mm_strm_wstrb => sig_s2mm_tstrb ,
s2mm_strm_wlast => s_axis_s2mm_tlast ,
s2mm_strm_wvalid => s_axis_s2mm_tvalid ,
s2mm_strm_wready => s_axis_s2mm_tready ,
s2mm_dbg_sel => s2mm_dbg_sel ,
s2mm_dbg_data => s2mm_dbg_data
);
end generate GEN_S2MM_BASIC;
end implementation;
|
-- *************************************************************************
--
-- (c) Copyright 2010-2011 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- *************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: axi_sg.vhd
--
-- Description:
-- Top level VHDL wrapper for the AXI DataMover
--
--
--
--
-- VHDL-Standard: VHDL'93
-------------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
library axi_sg_v4_1;
use axi_sg_v4_1.axi_sg_mm2s_basic_wrap;
use axi_sg_v4_1.axi_sg_s2mm_basic_wrap;
-------------------------------------------------------------------------------
entity axi_sg_datamover is
generic (
C_INCLUDE_MM2S : Integer range 0 to 2 := 2;
-- Specifies the type of MM2S function to include
-- 0 = Omit MM2S functionality
-- 1 = Full MM2S Functionality
-- 2 = Basic MM2S functionality
C_M_AXI_MM2S_ARID : Integer range 0 to 255 := 0;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_MM2S_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the MM2S ID port
C_M_AXI_MM2S_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_MM2S_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_M_AXIS_MM2S_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the MM2S Master Stream Data
-- Channel data bus
C_INCLUDE_MM2S_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit MM2S Status FIFO
-- 1 = Include MM2S Status FIFO
C_MM2S_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the MM2S Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_MM2S_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_MM2S_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the MM2S function
-- 0 = Omit DRE
-- 1 = Include DRE
C_MM2S_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the MM2S function
C_MM2S_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the MM2S Command Interface
C_MM2S_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the MM2S internal
-- child command queues in the Read Address Controller and
-- the Read Data Controller. Increasing this value will
-- allow more Read Addresses to be issued to the AXI4 Read
-- Address Channel before receipt of the associated read
-- data on the Read Data Channel.
C_MM2S_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- MM2S (Read) Store and Forward function
-- 0 = Omit MM2S Store and Forward
-- 1 = Include MM2S Store and Forward
C_INCLUDE_S2MM : Integer range 0 to 4 := 2;
-- Specifies the type of S2MM function to include
-- 0 = Omit S2MM functionality
-- 1 = Full S2MM Functionality
-- 2 = Basic S2MM functionality
C_M_AXI_S2MM_AWID : Integer range 0 to 255 := 1;
-- Specifies the constant value to output on
-- the ARID output port
C_M_AXI_S2MM_ID_WIDTH : Integer range 1 to 8 := 4;
-- Specifies the width of the S2MM ID port
C_M_AXI_S2MM_ADDR_WIDTH : Integer range 32 to 64 := 32;
-- Specifies the width of the MMap Read Address Channel
-- Address bus
C_M_AXI_S2MM_DATA_WIDTH : Integer range 32 to 1024 := 32;
-- Specifies the width of the MMap Read Data Channel
-- data bus
C_S_AXIS_S2MM_TDATA_WIDTH : Integer range 8 to 1024 := 32;
-- Specifies the width of the S2MM Master Stream Data
-- Channel data bus
C_INCLUDE_S2MM_STSFIFO : Integer range 0 to 1 := 1;
-- Specifies if a Status FIFO is to be implemented
-- 0 = Omit S2MM Status FIFO
-- 1 = Include S2MM Status FIFO
C_S2MM_STSCMD_FIFO_DEPTH : Integer range 1 to 16 := 4;
-- Specifies the depth of the S2MM Command FIFO and the
-- optional Status FIFO
-- Valid values are 1,4,8,16
C_S2MM_STSCMD_IS_ASYNC : Integer range 0 to 1 := 0;
-- Specifies if the Status and Command interfaces need to
-- be asynchronous to the primary data path clocking
-- 0 = Use same clocking as data path
-- 1 = Use special Status/Command clock for the interfaces
C_INCLUDE_S2MM_DRE : Integer range 0 to 1 := 1;
-- Specifies if DRE is to be included in the S2MM function
-- 0 = Omit DRE
-- 1 = Include DRE
C_S2MM_BURST_SIZE : Integer range 16 to 256 := 16;
-- Specifies the max number of databeats to use for MMap
-- burst transfers by the S2MM function
C_S2MM_BTT_USED : Integer range 8 to 23 := 16;
-- Specifies the number of bits used from the BTT field
-- of the input Command Word of the S2MM Command Interface
C_S2MM_SUPPORT_INDET_BTT : Integer range 0 to 1 := 0;
-- Specifies if support for indeterminate packet lengths
-- are to be received on the input Stream interface
-- 0 = Omit support (User MUST transfer the exact number of
-- bytes on the Stream interface as specified in the BTT
-- field of the Corresponding DataMover Command)
-- 1 = Include support for indeterminate packet lengths
-- This causes FIFOs to be added and "Store and Forward"
-- behavior of the S2MM function
C_S2MM_ADDR_PIPE_DEPTH : Integer range 1 to 30 := 3;
-- This parameter specifies the depth of the S2MM internal
-- address pipeline queues in the Write Address Controller
-- and the Write Data Controller. Increasing this value will
-- allow more Write Addresses to be issued to the AXI4 Write
-- Address Channel before transmission of the associated
-- write data on the Write Data Channel.
C_S2MM_INCLUDE_SF : Integer range 0 to 1 := 1 ;
-- This parameter specifies the inclusion/omission of the
-- S2MM (Write) Store and Forward function
-- 0 = Omit S2MM Store and Forward
-- 1 = Include S2MM Store and Forward
C_ENABLE_MULTI_CHANNEL : integer range 0 to 1 := 1;
C_ENABLE_EXTRA_FIELD : integer range 0 to 1 := 0;
C_FAMILY : String := "virtex7"
-- Specifies the target FPGA family type
);
port (
-- MM2S Primary Clock input ----------------------------------
m_axi_mm2s_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- MM2S Primary Reset input --
m_axi_mm2s_aresetn : in std_logic; --
-- Reset used for the internal master logic --
--------------------------------------------------------------
sg_ctl : in std_logic_vector (7 downto 0) ;
-- MM2S Halt request input control --------------------
mm2s_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- MM2S Halt Complete status flag --
mm2s_halt_cmplt : Out std_logic; --
-- Active high soft shutdown complete status --
-------------------------------------------------------
-- Error discrete output -------------------------
mm2s_err : Out std_logic; --
-- Composite Error indication --
--------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O ---------
m_axis_mm2s_cmdsts_aclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_mm2s_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) -------------------------------------------------
s_axis_mm2s_cmd_tvalid : in std_logic; --
s_axis_mm2s_cmd_tready : out std_logic; --
s_axis_mm2s_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_MM2S_ADDR_WIDTH+40)-1 downto 0); --
----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) ------------------------
m_axis_mm2s_sts_tvalid : out std_logic; --
m_axis_mm2s_sts_tready : in std_logic; --
m_axis_mm2s_sts_tdata : out std_logic_vector(7 downto 0); --
m_axis_mm2s_sts_tkeep : out std_logic_vector(0 downto 0); --
m_axis_mm2s_sts_tlast : out std_logic; --
--------------------------------------------------------------------
-- Address Posting contols -----------------------
mm2s_allow_addr_req : in std_logic; --
mm2s_addr_req_posted : out std_logic; --
mm2s_rd_xfer_cmplt : out std_logic; --
--------------------------------------------------
-- MM2S AXI Address Channel I/O --------------------------------------------------
m_axi_mm2s_arid : out std_logic_vector(C_M_AXI_MM2S_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_mm2s_araddr : out std_logic_vector(C_M_AXI_MM2S_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_mm2s_arlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_mm2s_arsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_mm2s_arburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_mm2s_arprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_mm2s_arcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_mm2s_aruser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_mm2s_arvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_mm2s_arready : in std_logic; --
-- AXI Address Channel READY input --
-----------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_mm2s_alock : out std_logic_vector(2 downto 0); --
-- m_axi_mm2s_acache : out std_logic_vector(4 downto 0); --
-- m_axi_mm2s_aqos : out std_logic_vector(3 downto 0); --
-- m_axi_mm2s_aregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- MM2S AXI MMap Read Data Channel I/O ------------------------------------------------
m_axi_mm2s_rdata : In std_logic_vector(C_M_AXI_MM2S_DATA_WIDTH-1 downto 0); --
m_axi_mm2s_rresp : In std_logic_vector(1 downto 0); --
m_axi_mm2s_rlast : In std_logic; --
m_axi_mm2s_rvalid : In std_logic; --
m_axi_mm2s_rready : Out std_logic; --
----------------------------------------------------------------------------------------
-- MM2S AXI Master Stream Channel I/O -------------------------------------------------------
m_axis_mm2s_tdata : Out std_logic_vector(C_M_AXIS_MM2S_TDATA_WIDTH-1 downto 0); --
m_axis_mm2s_tkeep : Out std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0); --
m_axis_mm2s_tlast : Out std_logic; --
m_axis_mm2s_tvalid : Out std_logic; --
m_axis_mm2s_tready : In std_logic; --
----------------------------------------------------------------------------------------------
-- Testing Support I/O --------------------------------------------------------
mm2s_dbg_sel : in std_logic_vector( 3 downto 0); --
mm2s_dbg_data : out std_logic_vector(31 downto 0) ; --
-------------------------------------------------------------------------------
-- S2MM Primary Clock input ---------------------------------
m_axi_s2mm_aclk : in std_logic; --
-- Primary synchronization clock for the Master side --
-- interface and internal logic. It is also used --
-- for the User interface synchronization when --
-- C_STSCMD_IS_ASYNC = 0. --
--
-- S2MM Primary Reset input --
m_axi_s2mm_aresetn : in std_logic; --
-- Reset used for the internal master logic --
-------------------------------------------------------------
-- S2MM Halt request input control ------------------
s2mm_halt : in std_logic; --
-- Active high soft shutdown request --
--
-- S2MM Halt Complete status flag --
s2mm_halt_cmplt : out std_logic; --
-- Active high soft shutdown complete status --
-----------------------------------------------------
-- S2MM Error discrete output ------------------
s2mm_err : Out std_logic; --
-- Composite Error indication --
------------------------------------------------
-- Memory Map to Stream Command FIFO and Status FIFO I/O -----------------
m_axis_s2mm_cmdsts_awclk : in std_logic; --
-- Secondary Clock input for async CMD/Status interface --
--
m_axis_s2mm_cmdsts_aresetn : in std_logic; --
-- Secondary Reset input for async CMD/Status interface --
--------------------------------------------------------------------------
-- User Command Interface Ports (AXI Stream) --------------------------------------------------
s_axis_s2mm_cmd_tvalid : in std_logic; --
s_axis_s2mm_cmd_tready : out std_logic; --
s_axis_s2mm_cmd_tdata : in std_logic_vector(((1+C_ENABLE_MULTI_CHANNEL)*C_M_AXI_S2MM_ADDR_WIDTH+40)-1 downto 0); --
-----------------------------------------------------------------------------------------------
-- User Status Interface Ports (AXI Stream) -----------------------------------------------------------
m_axis_s2mm_sts_tvalid : out std_logic; --
m_axis_s2mm_sts_tready : in std_logic; --
m_axis_s2mm_sts_tdata : out std_logic_vector(((C_S2MM_SUPPORT_INDET_BTT*24)+8)-1 downto 0); --
m_axis_s2mm_sts_tkeep : out std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0); --
m_axis_s2mm_sts_tlast : out std_logic; --
-------------------------------------------------------------------------------------------------------
-- Address posting controls -----------------------------------------
s2mm_allow_addr_req : in std_logic; --
s2mm_addr_req_posted : out std_logic; --
s2mm_wr_xfer_cmplt : out std_logic; --
s2mm_ld_nxt_len : out std_logic; --
s2mm_wr_len : out std_logic_vector(7 downto 0); --
---------------------------------------------------------------------
-- S2MM AXI Address Channel I/O ----------------------------------------------------
m_axi_s2mm_awid : out std_logic_vector(C_M_AXI_S2MM_ID_WIDTH-1 downto 0); --
-- AXI Address Channel ID output --
--
m_axi_s2mm_awaddr : out std_logic_vector(C_M_AXI_S2MM_ADDR_WIDTH-1 downto 0); --
-- AXI Address Channel Address output --
--
m_axi_s2mm_awlen : out std_logic_vector(7 downto 0); --
-- AXI Address Channel LEN output --
-- Sized to support 256 data beat bursts --
--
m_axi_s2mm_awsize : out std_logic_vector(2 downto 0); --
-- AXI Address Channel SIZE output --
--
m_axi_s2mm_awburst : out std_logic_vector(1 downto 0); --
-- AXI Address Channel BURST output --
--
m_axi_s2mm_awprot : out std_logic_vector(2 downto 0); --
-- AXI Address Channel PROT output --
--
m_axi_s2mm_awcache : out std_logic_vector(3 downto 0); --
-- AXI Address Channel CACHE output --
m_axi_s2mm_awuser : out std_logic_vector(3 downto 0); --
-- AXI Address Channel USER output --
--
m_axi_s2mm_awvalid : out std_logic; --
-- AXI Address Channel VALID output --
--
m_axi_s2mm_awready : in std_logic; --
-- AXI Address Channel READY input --
-------------------------------------------------------------------------------------
-- Currently unsupported AXI Address Channel output signals -------
-- m_axi_s2mm__awlock : out std_logic_vector(2 downto 0); --
-- m_axi_s2mm__awcache : out std_logic_vector(4 downto 0); --
-- m_axi_s2mm__awqos : out std_logic_vector(3 downto 0); --
-- m_axi_s2mm__awregion : out std_logic_vector(3 downto 0); --
-------------------------------------------------------------------
-- S2MM AXI MMap Write Data Channel I/O --------------------------------------------------
m_axi_s2mm_wdata : Out std_logic_vector(C_M_AXI_S2MM_DATA_WIDTH-1 downto 0); --
m_axi_s2mm_wstrb : Out std_logic_vector((C_M_AXI_S2MM_DATA_WIDTH/8)-1 downto 0); --
m_axi_s2mm_wlast : Out std_logic; --
m_axi_s2mm_wvalid : Out std_logic; --
m_axi_s2mm_wready : In std_logic; --
-------------------------------------------------------------------------------------------
-- S2MM AXI MMap Write response Channel I/O -------------------------
m_axi_s2mm_bresp : In std_logic_vector(1 downto 0); --
m_axi_s2mm_bvalid : In std_logic; --
m_axi_s2mm_bready : Out std_logic; --
----------------------------------------------------------------------
-- S2MM AXI Slave Stream Channel I/O -------------------------------------------------------
s_axis_s2mm_tdata : In std_logic_vector(C_S_AXIS_S2MM_TDATA_WIDTH-1 downto 0); --
s_axis_s2mm_tkeep : In std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0); --
s_axis_s2mm_tlast : In std_logic; --
s_axis_s2mm_tvalid : In std_logic; --
s_axis_s2mm_tready : Out std_logic; --
---------------------------------------------------------------------------------------------
-- Testing Support I/O ------------------------------------------------
s2mm_dbg_sel : in std_logic_vector( 3 downto 0); --
s2mm_dbg_data : out std_logic_vector(31 downto 0) --
------------------------------------------------------------------------
);
end entity axi_sg_datamover;
architecture implementation of axi_sg_datamover is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-- Function Declarations
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_clip_brst_len
--
-- Function Description:
-- This function is used to limit the parameterized max burst
-- databeats when the tranfer data width is 256 bits or greater.
-- This is required to keep from crossing the 4K byte xfer
-- boundary required by AXI. This process is further complicated
-- by the inclusion/omission of upsizers or downsizers in the
-- data path.
--
-------------------------------------------------------------------
function funct_clip_brst_len (param_burst_beats : integer;
mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
constant FCONST_SIZERS_ENABLED : boolean := (down_up_sizers_enabled > 0);
Variable fvar_max_burst_dbeats : Integer;
begin
-- coverage off
if (FCONST_SIZERS_ENABLED) then -- use MMap dwidth for calc
If (mmap_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (mmap_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (mmap_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit mmap width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
End if;
else -- use stream dwidth for calc
If (stream_transfer_bit_width <= 128) Then -- allowed
fvar_max_burst_dbeats := param_burst_beats;
Elsif (stream_transfer_bit_width <= 256) Then
If (param_burst_beats <= 128) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 128;
End if;
Elsif (stream_transfer_bit_width <= 512) Then
If (param_burst_beats <= 64) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 64;
End if;
Else -- 1024 bit stream width case
If (param_burst_beats <= 32) Then
fvar_max_burst_dbeats := param_burst_beats;
Else
fvar_max_burst_dbeats := 32;
End if;
-- coverage on
End if;
end if;
Return (fvar_max_burst_dbeats);
end function funct_clip_brst_len;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_depth_16
--
-- Function Description:
-- This function is used to fix the Command and Status FIFO depths to
-- 16 entries when Async clocking mode is enabled. This is required
-- due to the way the async_fifo_fg.vhd design in proc_common is
-- implemented.
-------------------------------------------------------------------
function funct_fix_depth_16 (async_clocking_mode : integer;
requested_depth : integer) return integer is
Variable fvar_depth_2_use : Integer;
begin
-- coverage off
If (async_clocking_mode = 1) Then -- async mode so fix at 16
fvar_depth_2_use := 16;
Elsif (requested_depth > 16) Then -- limit at 16
fvar_depth_2_use := 16;
-- coverage on
Else -- use requested depth
fvar_depth_2_use := requested_depth;
End if;
Return (fvar_depth_2_use);
end function funct_fix_depth_16;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_min_btt_width
--
-- Function Description:
-- This function calculates the minimum required value
-- for the used width of the command BTT field.
--
-------------------------------------------------------------------
function funct_get_min_btt_width (max_burst_beats : integer;
bytes_per_beat : integer ) return integer is
Variable var_min_btt_needed : Integer;
Variable var_max_bytes_per_burst : Integer;
begin
var_max_bytes_per_burst := max_burst_beats*bytes_per_beat;
-- coverage off
if (var_max_bytes_per_burst <= 16) then
var_min_btt_needed := 5;
elsif (var_max_bytes_per_burst <= 32) then
var_min_btt_needed := 6;
-- coverage on
elsif (var_max_bytes_per_burst <= 64) then
var_min_btt_needed := 7;
-- coverage off
elsif (var_max_bytes_per_burst <= 128) then
var_min_btt_needed := 8;
elsif (var_max_bytes_per_burst <= 256) then
var_min_btt_needed := 9;
elsif (var_max_bytes_per_burst <= 512) then
var_min_btt_needed := 10;
elsif (var_max_bytes_per_burst <= 1024) then
var_min_btt_needed := 11;
elsif (var_max_bytes_per_burst <= 2048) then
var_min_btt_needed := 12;
elsif (var_max_bytes_per_burst <= 4096) then
var_min_btt_needed := 13;
else -- 8K byte range
var_min_btt_needed := 14;
end if;
-- coverage on
Return (var_min_btt_needed);
end function funct_get_min_btt_width;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_get_xfer_bytes_per_dbeat
--
-- Function Description:
-- Calculates the nuber of bytes that will transfered per databeat
-- on the AXI4 MMap Bus.
--
-------------------------------------------------------------------
function funct_get_xfer_bytes_per_dbeat (mmap_transfer_bit_width : integer;
stream_transfer_bit_width : integer;
down_up_sizers_enabled : integer) return integer is
Variable temp_bytes_per_dbeat : Integer := 4;
begin
-- coverage off
if (down_up_sizers_enabled > 0) then -- down/up sizers are in use, use full mmap dwidth
temp_bytes_per_dbeat := mmap_transfer_bit_width/8;
-- coverage on
else -- No down/up sizers so use Stream data width
temp_bytes_per_dbeat := stream_transfer_bit_width/8;
end if;
Return (temp_bytes_per_dbeat);
end function funct_get_xfer_bytes_per_dbeat;
-------------------------------------------------------------------
-- Function
--
-- Function Name: funct_fix_btt_used
--
-- Function Description:
-- THis function makes sure the BTT width used is at least the
-- minimum needed.
--
-------------------------------------------------------------------
function funct_fix_btt_used (requested_btt_width : integer;
min_btt_width : integer) return integer is
Variable var_corrected_btt_width : Integer;
begin
-- coverage off
If (requested_btt_width < min_btt_width) Then
var_corrected_btt_width := min_btt_width;
-- coverage on
else
var_corrected_btt_width := requested_btt_width;
End if;
Return (var_corrected_btt_width);
end function funct_fix_btt_used;
-------------------------------------------------------------------
-- Constant Declarations
-------------------------------------------------------------------
Constant MM2S_TAG_WIDTH : integer := 4;
Constant S2MM_TAG_WIDTH : integer := 4;
Constant MM2S_DOWNSIZER_ENABLED : integer := C_MM2S_INCLUDE_SF;
Constant S2MM_UPSIZER_ENABLED : integer := C_S2MM_INCLUDE_SF + C_S2MM_SUPPORT_INDET_BTT;
Constant MM2S_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_MM2S_BURST_SIZE,
C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant S2MM_MAX_BURST_BEATS : integer := funct_clip_brst_len(C_S2MM_BURST_SIZE,
C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant MM2S_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_MM2S_STSCMD_IS_ASYNC,
C_MM2S_STSCMD_FIFO_DEPTH);
Constant S2MM_CMDSTS_FIFO_DEPTH : integer := funct_fix_depth_16(C_S2MM_STSCMD_IS_ASYNC,
C_S2MM_STSCMD_FIFO_DEPTH);
Constant MM2S_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_MM2S_DATA_WIDTH,
C_M_AXIS_MM2S_TDATA_WIDTH,
MM2S_DOWNSIZER_ENABLED);
Constant MM2S_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(MM2S_MAX_BURST_BEATS,
MM2S_BYTES_PER_BEAT);
Constant MM2S_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_MM2S_BTT_USED,
MM2S_MIN_BTT_NEEDED);
Constant S2MM_BYTES_PER_BEAT : integer := funct_get_xfer_bytes_per_dbeat(C_M_AXI_S2MM_DATA_WIDTH,
C_S_AXIS_S2MM_TDATA_WIDTH,
S2MM_UPSIZER_ENABLED);
Constant S2MM_MIN_BTT_NEEDED : integer := funct_get_min_btt_width(S2MM_MAX_BURST_BEATS,
S2MM_BYTES_PER_BEAT);
Constant S2MM_CORRECTED_BTT_USED : integer := funct_fix_btt_used(C_S2MM_BTT_USED,
S2MM_MIN_BTT_NEEDED);
-- Signals
signal sig_mm2s_tstrb : std_logic_vector((C_M_AXIS_MM2S_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_mm2s_sts_tstrb : std_logic_vector(0 downto 0) := (others => '0');
signal sig_s2mm_tstrb : std_logic_vector((C_S_AXIS_S2MM_TDATA_WIDTH/8)-1 downto 0) := (others => '0');
signal sig_s2mm_sts_tstrb : std_logic_vector((((C_S2MM_SUPPORT_INDET_BTT*24)+8)/8)-1 downto 0) := (others => '0');
begin --(architecture implementation)
-------------------------------------------------------------
-- Conversion to tkeep for external stream connnections
-------------------------------------------------------------
-- MM2S Stream Output
m_axis_mm2s_tkeep <= sig_mm2s_tstrb ;
-- MM2S Status Stream Output
m_axis_mm2s_sts_tkeep <= sig_mm2s_sts_tstrb ;
-- S2MM Stream Input
sig_s2mm_tstrb <= s_axis_s2mm_tkeep ;
-- S2MM Status Stream Output
m_axis_s2mm_sts_tkeep <= sig_s2mm_sts_tstrb ;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_MM2S_BASIC
--
-- If Generate Description:
-- Instantiate the MM2S Basic Wrapper
--
--
------------------------------------------------------------
GEN_MM2S_BASIC : if (C_INCLUDE_MM2S = 2) generate
begin
------------------------------------------------------------
-- Instance: I_MM2S_BASIC_WRAPPER
--
-- Description:
-- Read Basic Wrapper Instance
--
------------------------------------------------------------
I_MM2S_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_mm2s_basic_wrap
generic map (
C_INCLUDE_MM2S => C_INCLUDE_MM2S ,
C_MM2S_ARID => C_M_AXI_MM2S_ARID ,
C_MM2S_ID_WIDTH => C_M_AXI_MM2S_ID_WIDTH ,
C_MM2S_ADDR_WIDTH => C_M_AXI_MM2S_ADDR_WIDTH ,
C_MM2S_MDATA_WIDTH => C_M_AXI_MM2S_DATA_WIDTH ,
C_MM2S_SDATA_WIDTH => C_M_AXIS_MM2S_TDATA_WIDTH ,
C_INCLUDE_MM2S_STSFIFO => C_INCLUDE_MM2S_STSFIFO ,
C_MM2S_STSCMD_FIFO_DEPTH => MM2S_CMDSTS_FIFO_DEPTH ,
C_MM2S_STSCMD_IS_ASYNC => C_MM2S_STSCMD_IS_ASYNC ,
C_INCLUDE_MM2S_DRE => C_INCLUDE_MM2S_DRE ,
C_MM2S_BURST_SIZE => MM2S_MAX_BURST_BEATS ,
C_MM2S_BTT_USED => MM2S_CORRECTED_BTT_USED ,
C_MM2S_ADDR_PIPE_DEPTH => C_MM2S_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => MM2S_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
mm2s_aclk => m_axi_mm2s_aclk ,
mm2s_aresetn => m_axi_mm2s_aresetn ,
sg_ctl => sg_ctl ,
mm2s_halt => mm2s_halt ,
mm2s_halt_cmplt => mm2s_halt_cmplt ,
mm2s_err => mm2s_err ,
mm2s_cmdsts_awclk => m_axis_mm2s_cmdsts_aclk ,
mm2s_cmdsts_aresetn => m_axis_mm2s_cmdsts_aresetn ,
mm2s_cmd_wvalid => s_axis_mm2s_cmd_tvalid ,
mm2s_cmd_wready => s_axis_mm2s_cmd_tready ,
mm2s_cmd_wdata => s_axis_mm2s_cmd_tdata ,
mm2s_sts_wvalid => m_axis_mm2s_sts_tvalid ,
mm2s_sts_wready => m_axis_mm2s_sts_tready ,
mm2s_sts_wdata => m_axis_mm2s_sts_tdata ,
mm2s_sts_wstrb => sig_mm2s_sts_tstrb ,
mm2s_sts_wlast => m_axis_mm2s_sts_tlast ,
mm2s_allow_addr_req => mm2s_allow_addr_req ,
mm2s_addr_req_posted => mm2s_addr_req_posted ,
mm2s_rd_xfer_cmplt => mm2s_rd_xfer_cmplt ,
mm2s_arid => m_axi_mm2s_arid ,
mm2s_araddr => m_axi_mm2s_araddr ,
mm2s_arlen => m_axi_mm2s_arlen ,
mm2s_arsize => m_axi_mm2s_arsize ,
mm2s_arburst => m_axi_mm2s_arburst ,
mm2s_arprot => m_axi_mm2s_arprot ,
mm2s_arcache => m_axi_mm2s_arcache ,
mm2s_aruser => m_axi_mm2s_aruser ,
mm2s_arvalid => m_axi_mm2s_arvalid ,
mm2s_arready => m_axi_mm2s_arready ,
mm2s_rdata => m_axi_mm2s_rdata ,
mm2s_rresp => m_axi_mm2s_rresp ,
mm2s_rlast => m_axi_mm2s_rlast ,
mm2s_rvalid => m_axi_mm2s_rvalid ,
mm2s_rready => m_axi_mm2s_rready ,
mm2s_strm_wdata => m_axis_mm2s_tdata ,
mm2s_strm_wstrb => sig_mm2s_tstrb ,
mm2s_strm_wlast => m_axis_mm2s_tlast ,
mm2s_strm_wvalid => m_axis_mm2s_tvalid ,
mm2s_strm_wready => m_axis_mm2s_tready ,
mm2s_dbg_sel => mm2s_dbg_sel ,
mm2s_dbg_data => mm2s_dbg_data
);
end generate GEN_MM2S_BASIC;
------------------------------------------------------------
-- If Generate
--
-- Label: GEN_S2MM_BASIC
--
-- If Generate Description:
-- Instantiate the S2MM Basic Wrapper
--
--
------------------------------------------------------------
GEN_S2MM_BASIC : if (C_INCLUDE_S2MM = 2) generate
begin
------------------------------------------------------------
-- Instance: I_S2MM_BASIC_WRAPPER
--
-- Description:
-- Write Basic Wrapper Instance
--
------------------------------------------------------------
I_S2MM_BASIC_WRAPPER : entity axi_sg_v4_1.axi_sg_s2mm_basic_wrap
generic map (
C_INCLUDE_S2MM => C_INCLUDE_S2MM ,
C_S2MM_AWID => C_M_AXI_S2MM_AWID ,
C_S2MM_ID_WIDTH => C_M_AXI_S2MM_ID_WIDTH ,
C_S2MM_ADDR_WIDTH => C_M_AXI_S2MM_ADDR_WIDTH ,
C_S2MM_MDATA_WIDTH => C_M_AXI_S2MM_DATA_WIDTH ,
C_S2MM_SDATA_WIDTH => C_S_AXIS_S2MM_TDATA_WIDTH ,
C_INCLUDE_S2MM_STSFIFO => C_INCLUDE_S2MM_STSFIFO ,
C_S2MM_STSCMD_FIFO_DEPTH => S2MM_CMDSTS_FIFO_DEPTH ,
C_S2MM_STSCMD_IS_ASYNC => C_S2MM_STSCMD_IS_ASYNC ,
C_INCLUDE_S2MM_DRE => C_INCLUDE_S2MM_DRE ,
C_S2MM_BURST_SIZE => S2MM_MAX_BURST_BEATS ,
C_S2MM_ADDR_PIPE_DEPTH => C_S2MM_ADDR_PIPE_DEPTH ,
C_TAG_WIDTH => S2MM_TAG_WIDTH ,
C_ENABLE_MULTI_CHANNEL => C_ENABLE_MULTI_CHANNEL ,
C_ENABLE_EXTRA_FIELD => C_ENABLE_EXTRA_FIELD,
C_FAMILY => C_FAMILY
)
port map (
s2mm_aclk => m_axi_s2mm_aclk ,
s2mm_aresetn => m_axi_s2mm_aresetn ,
sg_ctl => sg_ctl ,
s2mm_halt => s2mm_halt ,
s2mm_halt_cmplt => s2mm_halt_cmplt ,
s2mm_err => s2mm_err ,
s2mm_cmdsts_awclk => m_axis_s2mm_cmdsts_awclk ,
s2mm_cmdsts_aresetn => m_axis_s2mm_cmdsts_aresetn ,
s2mm_cmd_wvalid => s_axis_s2mm_cmd_tvalid ,
s2mm_cmd_wready => s_axis_s2mm_cmd_tready ,
s2mm_cmd_wdata => s_axis_s2mm_cmd_tdata ,
s2mm_sts_wvalid => m_axis_s2mm_sts_tvalid ,
s2mm_sts_wready => m_axis_s2mm_sts_tready ,
s2mm_sts_wdata => m_axis_s2mm_sts_tdata ,
s2mm_sts_wstrb => sig_s2mm_sts_tstrb ,
s2mm_sts_wlast => m_axis_s2mm_sts_tlast ,
s2mm_allow_addr_req => s2mm_allow_addr_req ,
s2mm_addr_req_posted => s2mm_addr_req_posted ,
s2mm_wr_xfer_cmplt => s2mm_wr_xfer_cmplt ,
s2mm_ld_nxt_len => s2mm_ld_nxt_len ,
s2mm_wr_len => s2mm_wr_len ,
s2mm_awid => m_axi_s2mm_awid ,
s2mm_awaddr => m_axi_s2mm_awaddr ,
s2mm_awlen => m_axi_s2mm_awlen ,
s2mm_awsize => m_axi_s2mm_awsize ,
s2mm_awburst => m_axi_s2mm_awburst ,
s2mm_awprot => m_axi_s2mm_awprot ,
s2mm_awcache => m_axi_s2mm_awcache ,
s2mm_awuser => m_axi_s2mm_awuser ,
s2mm_awvalid => m_axi_s2mm_awvalid ,
s2mm_awready => m_axi_s2mm_awready ,
s2mm_wdata => m_axi_s2mm_wdata ,
s2mm_wstrb => m_axi_s2mm_wstrb ,
s2mm_wlast => m_axi_s2mm_wlast ,
s2mm_wvalid => m_axi_s2mm_wvalid ,
s2mm_wready => m_axi_s2mm_wready ,
s2mm_bresp => m_axi_s2mm_bresp ,
s2mm_bvalid => m_axi_s2mm_bvalid ,
s2mm_bready => m_axi_s2mm_bready ,
s2mm_strm_wdata => s_axis_s2mm_tdata ,
s2mm_strm_wstrb => sig_s2mm_tstrb ,
s2mm_strm_wlast => s_axis_s2mm_tlast ,
s2mm_strm_wvalid => s_axis_s2mm_tvalid ,
s2mm_strm_wready => s_axis_s2mm_tready ,
s2mm_dbg_sel => s2mm_dbg_sel ,
s2mm_dbg_data => s2mm_dbg_data
);
end generate GEN_S2MM_BASIC;
end implementation;
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