+-- `Deep Thought', a softcore CPU implemented on a FPGA
+--
+-- Copyright (C) 2010 Markus Hofstaetter <markus.manrow@gmx.at>
+-- Copyright (C) 2010 Martin Perner <e0725782@student.tuwien.ac.at>
+-- Copyright (C) 2010 Stefan Rebernig <stefan.rebernig@gmail.com>
+-- Copyright (C) 2010 Manfred Schwarz <e0725898@student.tuwien.ac.at>
+-- Copyright (C) 2010 Bernhard Urban <lewurm@gmail.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 3 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, see <http://www.gnu.org/licenses/>.
+
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.extension_pkg.all;
use work.extension_uart_pkg.all;
use work.extension_7seg_pkg.all;
+use work.extension_imp_pkg.all;
+use work.extension_timer_pkg.all;
architecture behav of writeback_stage is
signal wb_reg, wb_reg_nxt : writeback_rec;
-signal ext_uart,ext_timer,ext_gpmp,ext_7seg,ext_int : extmod_rec;
-signal ext_uart_out, ext_timer_out, ext_gpmp_out, ext_int_out : gp_register_t;
+signal ext_uart,ext_timer,ext_gpmp,ext_7seg,ext_int,ext_imp : extmod_rec;
+signal ext_uart_out, ext_timer_out, ext_gpmp_out, ext_int_out,ext_imp_out : gp_register_t;
--signal int_req : interrupt_t;
signal uart_int : std_logic;
signal calc_mem_res : gp_register_t;
begin
-
- ext_timer_out <= (others => '0'); --TODO: delete when timer is connected
ext_gpmp_out <= (others => '0'); --TODO: delete when gpm is connected
+ spartan3e: if FPGATYPE = "s3e" generate
+ data_ram : ram_xilinx
+ generic map (
+ DATA_ADDR_WIDTH
+ )
+ port map (
+ clk,
+ data_addr(DATA_ADDR_WIDTH+1 downto 2),
+ data_addr(DATA_ADDR_WIDTH+1 downto 2),
+ wb_reg_nxt.byte_en,
+ dmem_we,
+ wb_reg_nxt.data, --ram_data,
+ data_ram_read
+ );
+ end generate;
+ -- else generate gibt es erst mit vhdl 2008 ...
+ altera: if FPGATYPE /= "s3e" generate
data_ram : r_w_ram_be
generic map (
DATA_ADDR_WIDTH
wb_reg_nxt.data, --ram_data,
data_ram_read
);
+ end generate;
uart : extension_uart
generic map(
- RESET_VALUE
+ RESET_VALUE,
+ CLK_BAUD
)
port map(
clk ,
bus_tx
);
+imp : extension_imp
+ generic map(
+ RESET_VALUE
+ )
+ port map(
+ clk ,
+ reset,
+ ext_imp,
+ ext_imp_out,
+ im_addr,
+ im_data,
+ new_im_data_out
+ );
+
+ rem7seg: if "a" /= "a" generate
+
+ altera_7seg: if FPGATYPE /= "s3e" generate
sseg : extension_7seg
generic map(
RESET_VALUE
port map(
clk,
reset,
- ext_7seg,
- sseg0,
- sseg1,
- sseg2,
- sseg3
+ --ext_7seg,
+ ext_7seg
+ --sseg0,
+ --sseg1,
+ --sseg2,
+ --sseg3
);
+ end generate;
+ end generate;
interrupt : extension_interrupt
generic map(
int_req
);
+
+timer : extension_timer
+ generic map(RESET_VALUE)
+ port map(clk, reset, ext_timer, ext_timer_out);
syn: process(clk, reset)
if (alu_jmp = '1' and wb_reg.dmem_en = '1' and wb_reg.dmem_write_en = '0' and write_en = '0') then
jump_addr <= data_ram_read;
else
- jump_addr <= result;
+ jump_addr <= result;
end if;
-- if alu_jmp = '0' and br_pred = '1' and write_en = '0' then
data_addr <= (others => '0');
dmem_we <= '0';
- if (wb_reg.address(DATA_ADDR_WIDTH+2) /= '1') then
+ if (wb_reg.address(DATA_ADDR_WIDTH+3) /= '1') then
data_out := data_ram_read;
else
- reg_we_v := reg_we_v and ext_anysel;
+ reg_we_v := reg_we_v and (ext_anysel or not(wb_reg.dmem_en));
data_out := data_ram_read_ext;
end if;
data_out := to_stdlogicvector(to_bitvector(data_out) srl to_integer(unsigned(wb_reg.address(BYTEADDR-1 downto 0)))*byte_t'length);
- if (wb_reg_nxt.address(DATA_ADDR_WIDTH+2) /= '1') then
+ if (wb_reg_nxt.address(DATA_ADDR_WIDTH+3) /= '1') then
data_addr(DATA_ADDR_WIDTH+1 downto 0) <= wb_reg_nxt.address(DATA_ADDR_WIDTH+1 downto 0);
dmem_we <= wb_reg_nxt.dmem_write_en;
end if;
ext_timer.sel <='0';
ext_gpmp.sel <='0';
ext_int.sel <= '0';
+ ext_imp.sel <= '0';
ext_uart.wr_en <= wr_en;
ext_7seg.wr_en <= wr_en;
ext_timer.wr_en <= wr_en;
ext_gpmp.wr_en <= wr_en;
ext_int.wr_en <= wr_en;
+ ext_imp.wr_en <= wr_en;
ext_uart.byte_en <= byte_en;
ext_7seg.byte_en <= byte_en;
ext_timer.byte_en <= byte_en;
ext_gpmp.byte_en <= byte_en;
ext_int.byte_en <= byte_en;
+ ext_imp.byte_en <= byte_en;
ext_uart.addr <= addr;
ext_7seg.addr <= addr;
ext_timer.addr <= addr;
ext_gpmp.addr <= addr;
ext_int.addr <= addr;
+ ext_imp.addr <= addr;
ext_uart.data <= data;
ext_7seg.data <= data;
ext_timer.data <= data;
ext_gpmp.data <= data;
ext_int.data <= data;
+ ext_imp.data <= data;
-- wenn ich hier statt dem 4rer die konstante nehme dann gibts an fehler wegen nicht lokaler variable -.-
case addrid is
when EXT_UART_ADDR =>
ext_uart.sel <= enable;
- ext_anysel <= enable;
+ ext_anysel <= enable;
+
+-- ext_uart.wr_en <= wb_reg_nxt.dmem_write_en;
+-- ext_uart.data <= ram_data;
+-- ext_uart.addr <= wb_reg_nxt.address(31 downto 2);
+-- case wb_reg_nxt.address(1 downto 0) is
+-- when "00" => ext_uart.byte_en <= "0001";
+-- when "01" => ext_uart.byte_en <= "0010";
+-- when "10" => ext_uart.byte_en <= "0100";
+-- --when "11" => ext_uart.byte_en <= "1000";
+-- when "11" => ext_uart.byte_en <= "1111";
+-- when others => null;
+-- end case;
+ when EXT_IMP_ADDR =>
+ ext_imp.sel <= enable;
+ ext_anysel <= enable;
-- ext_uart.wr_en <= wb_reg_nxt.dmem_write_en;
-- ext_uart.data <= ram_data;
when EXT_INT_ADDR =>
ext_int.sel <= enable;
- ext_anysel <= enable;
+ ext_anysel <= enable;
-- ext_uart.wr_en <= wb_reg_nxt.dmem_write_en;
-- ext_uart.data <= ram_data;
-- when "11" => ext_timer.byte_en <= "1000";
-- when others => null;
-- end case;
- when EXT_GPMP_ADDR =>
- ext_gpmp.sel <= enable;
- ext_anysel <= enable;
+-- when EXT_GPMP_ADDR =>
+ -- ext_gpmp.sel <= enable;
+-- ext_anysel <= enable;
-- ext_gpmp.wr_en <= wb_reg_nxt.dmem_write_en;
-- ext_gpmp.data <= ram_data;
-- ext_gpmp.addr <= wb_reg_nxt.address(wb_reg_nxt.address'high downto BYTEADDR);
projects / calu.git / blobdiff