3 use IEEE.std_logic_1164.all;
4 use IEEE.numeric_std.all;
6 use work.common_pkg.all;
10 component fetch_stage is
13 RESET_VALUE : std_logic;
24 jump_result : in instruction_addr_t;
25 prediction_result : in instruction_addr_t;
26 branch_prediction_bit : in std_logic;
27 alu_jump_bit : in std_logic;
30 instruction : out instruction_word_t;
31 prog_cnt : out instruction_addr_t
33 end component fetch_stage;
37 component decode_stage is
40 RESET_VALUE : std_logic;
51 instruction : in instruction_word_t;
52 prog_cnt : in instruction_addr_t;
53 reg_w_addr : in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
54 reg_wr_data : in gp_register_t;
55 reg_we : in std_logic;
59 -- reg1_rd_data : out gp_register_t;
60 -- reg2_rd_data : out gp_register_t;
61 branch_prediction_res : out instruction_word_t;
62 branch_prediction_bit : out std_logic;
64 to_next_stage : out dec_op
66 end component decode_stage;
72 instruction : in instruction_word_t;
73 instr_spl : out instruction_rec
77 end component decoder;
79 component execute_stage is
83 RESET_VALUE : std_logic
85 --LOGIC_ACT : std_logic;
92 dec_instr : in dec_op;
93 regfile_val : in gp_register_t;
94 reg_we : in std_logic;
95 reg_addr : in gp_addr_t;
97 result : out gp_register_t;--reg
98 result_addr : out gp_addr_t;--reg
99 addr : out word_t; --memaddr
100 data : out gp_register_t; --mem data --ureg
101 alu_jump : out std_logic;--reg
102 brpr : out std_logic; --reg
103 wr_en : out std_logic;--regop --reg
104 dmem : out std_logic;--memop
105 dmem_write_en : out std_logic;
106 hword : out std_logic;
107 byte_s : out std_logic
109 end component execute_stage;
113 component writeback_stage is
115 -- active reset value
116 RESET_VALUE : std_logic;
117 -- active logic value
118 LOGIC_ACT : std_logic
124 reset : in std_logic;
126 result : in gp_register_t; --reg (alu result or jumpaddr)
127 result_addr : in gp_addr_t; --reg
128 address : in word_t; --ureg
129 ram_data : in word_t; --ureg
130 alu_jmp : in std_logic; --reg
131 br_pred : in std_logic; --reg
132 write_en : in std_logic; --reg (register file)
133 dmem_en : in std_logic; --ureg (jump addr in mem or in address)
134 dmem_write_en : in std_logic; --ureg
135 hword : in std_logic; --ureg
136 byte_s : in std_logic; --ureg
138 regfile_val : out gp_register_t;
139 reg_we : out std_logic;
140 reg_addr : out gp_addr_t;
141 jump_addr : out instruction_addr_t;
144 end component writeback_stage;
148 end package core_pkg;