3 use IEEE.std_logic_1164.all;
4 use IEEE.numeric_std.all;
6 use work.common_pkg.all;
7 use work.extension_pkg.all;
11 component fetch_stage is
14 RESET_VALUE : std_logic;
25 jump_result : in instruction_addr_t;
26 prediction_result : in instruction_addr_t;
27 branch_prediction_bit : in std_logic;
28 alu_jump_bit : in std_logic;
29 int_req : in interrupt_t;
30 new_im_data_in : in std_logic;
31 im_addr : in gp_register_t;
32 im_data : in gp_register_t;
35 instruction : out instruction_word_t;
36 prog_cnt : out instruction_addr_t;
40 end component fetch_stage;
44 component decode_stage is
47 RESET_VALUE : std_logic;
58 instruction : in instruction_word_t;
59 prog_cnt : in instruction_addr_t;
60 reg_w_addr : in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
61 reg_wr_data : in gp_register_t;
62 reg_we : in std_logic;
66 -- reg1_rd_data : out gp_register_t;
67 -- reg2_rd_data : out gp_register_t;
68 branch_prediction_res : out instruction_word_t;
69 branch_prediction_bit : out std_logic;
71 to_next_stage : out dec_op
73 end component decode_stage;
79 instruction : in instruction_word_t;
80 instr_spl : out instruction_rec
84 end component decoder;
86 component execute_stage is
90 RESET_VALUE : std_logic
92 --LOGIC_ACT : std_logic;
99 dec_instr : in dec_op;
100 regfile_val : in gp_register_t;
101 reg_we : in std_logic;
102 reg_addr : in gp_addr_t;
103 ext_reg : in extmod_rec;
105 result : out gp_register_t;--reg
106 result_addr : out gp_addr_t;--reg
107 addr : out word_t; --memaddr
108 data : out gp_register_t; --mem data --ureg
109 alu_jump : out std_logic;--reg
110 brpr : out std_logic; --reg
111 wr_en : out std_logic;--regop --reg
112 dmem : out std_logic;--memop
113 dmem_write_en : out std_logic;
114 hword : out std_logic;
115 byte_s : out std_logic;
117 ext_data_out : out gp_register_t
119 end component execute_stage;
123 component writeback_stage is
125 -- active reset value
126 RESET_VALUE : std_logic;
127 -- active logic value
128 LOGIC_ACT : std_logic;
134 reset : in std_logic;
136 result : in gp_register_t; --reg (alu result or jumpaddr)
137 result_addr : in gp_addr_t; --reg
138 address : in word_t; --ureg
139 ram_data : in word_t; --ureg
140 alu_jmp : in std_logic; --reg
141 br_pred : in std_logic; --reg
142 write_en : in std_logic; --reg (register file)
143 dmem_en : in std_logic; --ureg (jump addr in mem or in address)
144 dmem_write_en : in std_logic; --ureg
145 hword : in std_logic; --ureg
146 byte_s : in std_logic; --ureg
148 regfile_val : out gp_register_t;
149 reg_we : out std_logic;
150 reg_addr : out gp_addr_t;
151 jump_addr : out instruction_addr_t;
152 jump : out std_logic;
154 bus_tx : out std_logic;
155 bus_rx : in std_logic;
156 new_im_data_out : out std_logic;
157 im_addr : out gp_register_t;
158 im_data : out gp_register_t;
160 sseg0 : out std_logic_vector(0 to 6);
161 sseg1 : out std_logic_vector(0 to 6);
162 sseg2 : out std_logic_vector(0 to 6);
163 sseg3 : out std_logic_vector(0 to 6);
165 int_req : out interrupt_t
168 end component writeback_stage;
172 end package core_pkg;