+-- `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.common_pkg.all;
+use work.extension_pkg.all;
package core_pkg is
--System inputs
clk : in std_logic;
reset : in std_logic;
-
+ s_reset : in std_logic;
+
--Data inputs
jump_result : in instruction_addr_t;
prediction_result : in instruction_addr_t;
branch_prediction_bit : in std_logic;
alu_jump_bit : in std_logic;
+ int_req : in interrupt_t;
+ new_im_data_in : in std_logic;
+ im_addr : in gp_register_t;
+ im_data : in gp_register_t;
--Data outputs
- instruction : out instruction_word_t
-
+ instruction : out instruction_word_t;
+ prog_cnt : out instruction_addr_t;
+ -- debug
+ led2 : out std_logic
);
end component fetch_stage;
--Data inputs
instruction : in instruction_word_t;
+ prog_cnt : in instruction_addr_t;
reg_w_addr : in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
reg_wr_data : in gp_register_t;
reg_we : in std_logic;
+ nop : in std_logic;
--Data outputs
-- reg1_rd_data : out gp_register_t;
-- reg2_rd_data : out gp_register_t;
- branch_prediction_res : out instruction_word_t;
+ branch_prediction_res : out instruction_addr_t;
branch_prediction_bit : out std_logic;
+
to_next_stage : out dec_op
);
end component decode_stage;
end component decoder;
component execute_stage is
+
generic (
-- active reset value
- RESET_VALUE : std_logic;
+ RESET_VALUE : std_logic
-- active logic value
- LOGIC_ACT : std_logic
+ --LOGIC_ACT : std_logic;
);
port(
--System inputs
clk : in std_logic;
- reset : in std_logic
+ reset : in std_logic;
+ dec_instr : in dec_op;
+ regfile_val : in gp_register_t;
+ reg_we : in std_logic;
+ reg_addr : in gp_addr_t;
+ ext_reg : in extmod_rec;
+ --System output
+ result : out gp_register_t;--reg
+ result_addr : out gp_addr_t;--reg
+ addr : out word_t; --memaddr
+ data : out gp_register_t; --mem data --ureg
+ alu_jump : out std_logic;--reg
+ brpr : out std_logic; --reg
+ wr_en : out std_logic;--regop --reg
+ dmem : out std_logic;--memop
+ dmem_write_en : out std_logic;
+ hword : out std_logic;
+ byte_s : out std_logic;
+
+ ext_data_out : out gp_register_t
);
end component execute_stage;
-- active reset value
RESET_VALUE : std_logic;
-- active logic value
- LOGIC_ACT : std_logic
-
+ LOGIC_ACT : std_logic;
+ FPGATYPE : string;
+ CLK_BAUD : integer
);
port(
--System inputs
clk : in std_logic;
- reset : in std_logic
+ reset : in std_logic;
+
+ result : in gp_register_t; --reg (alu result or jumpaddr)
+ result_addr : in gp_addr_t; --reg
+ address : in word_t; --ureg
+ ram_data : in word_t; --ureg
+ alu_jmp : in std_logic; --reg
+ br_pred : in std_logic; --reg
+ write_en : in std_logic; --reg (register file)
+ dmem_en : in std_logic; --ureg (jump addr in mem or in address)
+ dmem_write_en : in std_logic; --ureg
+ hword : in std_logic; --ureg
+ byte_s : in std_logic; --ureg
+
+ regfile_val : out gp_register_t;
+ reg_we : out std_logic;
+ reg_addr : out gp_addr_t;
+ jump_addr : out instruction_addr_t;
+ jump : out std_logic;
+ -- same here
+ bus_tx : out std_logic;
+ bus_rx : in std_logic;
+ new_im_data_out : out std_logic;
+ im_addr : out gp_register_t;
+ im_data : out gp_register_t;
+
+ --sseg0 : out std_logic_vector(0 to 6);
+ --sseg1 : out std_logic_vector(0 to 6);
+ --sseg2 : out std_logic_vector(0 to 6);
+ --sseg3 : out std_logic_vector(0 to 6);
+
+ int_req : out interrupt_t
+
);
end component writeback_stage;
projects / calu.git / blobdiff