2 use IEEE.std_logic_1164.all;
3 use IEEE.numeric_std.all;
5 use work.common_pkg.all;
12 sys_clk : in std_logic;
13 sys_res : in std_logic;
14 result : out gp_register_t
20 architecture behav of core_top is
22 signal jump_result_pin : instruction_addr_t;
23 signal prediction_result_pin : instruction_addr_t;
24 signal branch_prediction_bit_pin : std_logic;
25 signal alu_jump_bit_pin : std_logic;
26 signal instruction_pin : instruction_word_t;
28 signal reg_w_addr_pin : std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
29 signal reg_wr_data_pin : gp_register_t;
30 signal reg_we_pin : std_logic;
31 signal to_next_stage : dec_op;
33 -- signal reg1_rd_data_pin : gp_register_t;
34 -- signal reg2_rd_data_pin : gp_register_t;
36 signal result_pin : gp_register_t;--reg
37 signal result_addr_pin : gp_addr_t;--reg
38 signal addr_pin : word_t; --memaddr
39 signal data_pin : gp_register_t; --mem data --ureg
40 signal alu_jump_pin : std_logic;--reg
41 signal brpr_pin : std_logic; --reg
42 signal wr_en_pin : std_logic;--regop --reg
43 signal dmem_pin : std_logic;--memop
44 signal dmem_wr_en_pin : std_logic;
45 signal hword_pin : std_logic;
46 signal byte_s_pin : std_logic;
47 signal nop_pin : std_logic;
52 fetch_st : fetch_stage
61 clk => sys_clk, --: in std_logic;
62 reset => sys_res, --: in std_logic;
65 jump_result => jump_result_pin, --: in instruction_addr_t;
66 prediction_result => prediction_result_pin, --: in instruction_addr_t;
67 branch_prediction_bit => branch_prediction_bit_pin, --: in std_logic;
68 alu_jump_bit => alu_jump_bit_pin, --: in std_logic;
71 instruction => instruction_pin --: out instruction_word_t
74 decode_st : decode_stage
84 clk => sys_clk, --: in std_logic;
85 reset => sys_res, -- : in std_logic;
88 instruction => instruction_pin, --: in instruction_word_t;
89 reg_w_addr => reg_w_addr_pin, --: in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
90 reg_wr_data => reg_wr_data_pin, --: in gp_register_t;
91 reg_we => reg_we_pin, --: in std_logic;
95 branch_prediction_res => prediction_result_pin, --: instruction_word_t;
96 branch_prediction_bit => branch_prediction_bit_pin, --: std_logic
97 to_next_stage => to_next_stage
100 exec_st : execute_stage
102 port map(sys_clk, sys_res,to_next_stage, reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, result_pin, result_addr_pin,addr_pin,
103 data_pin, alu_jump_pin,brpr_pin, wr_en_pin, dmem_pin,dmem_wr_en_pin,hword_pin,byte_s_pin);
105 writeback_st : writeback_stage
106 generic map('0', '1')
107 port map(sys_clk, sys_res, result_pin, result_addr_pin, addr_pin, data_pin, alu_jump_pin, brpr_pin,
108 wr_en_pin, dmem_pin, dmem_wr_en_pin, hword_pin, byte_s_pin,
109 reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, jump_result_pin, alu_jump_bit_pin);
112 --init : process(all)
115 -- jump_result_pin <= (others => '0');
116 -- alu_jump_bit_pin <= '0';
117 -- reg_w_addr_pin <= (others => '0');
118 -- reg_wr_data_pin <= (others => '0');
119 -- reg_we_pin <= '0';
123 result <= result_pin;
124 nop_pin <= (alu_jump_bit_pin xor brpr_pin);