use work.common_pkg.all;
use work.core_pkg.all;
+use work.extension_pkg.all;
entity core_top is
port(
--System input pins
+ sys_res : in std_logic;
sys_clk : in std_logic;
- sys_res : in std_logic;
- result : out gp_register_t;
- jump_result : out instruction_addr_t;
- reg_wr_data : out gp_register_t
+-- result : out gp_register_t;
+-- reg_wr_data : out gp_register_t
+ -- uart
+ bus_tx : out std_logic;
+ 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)
);
end core_top;
architecture behav of core_top is
+ signal jump_result : instruction_addr_t;
signal jump_result_pin : instruction_addr_t;
signal prediction_result_pin : instruction_addr_t;
signal branch_prediction_bit_pin : std_logic;
signal alu_jump_bit_pin : std_logic;
signal instruction_pin : instruction_word_t;
+ signal prog_cnt_pin : instruction_addr_t;
signal reg_w_addr_pin : std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
signal reg_wr_data_pin : gp_register_t;
signal dmem_wr_en_pin : std_logic;
signal hword_pin : std_logic;
signal byte_s_pin : std_logic;
+
+ signal gpm_in_pin : extmod_rec;
+ signal gpm_out_pin : gp_register_t;
signal nop_pin : std_logic;
- -- extension signals
- signal ext_gpmp : extmod_rec;
- signal pointer : pointer_count;
- signal dec_in,p_en : std_logic;
- signal data_out : gp_register_t;
- signal pointer_val : gp_register_t;
+ signal vers, vers_nxt : exec2wb_rec;
begin
alu_jump_bit => alu_jump_bit_pin, --: in std_logic;
--Data outputs
- instruction => instruction_pin --: out instruction_word_t
+ instruction => instruction_pin, --: out instruction_word_t
+ prog_cnt => prog_cnt_pin
);
decode_st : decode_stage
--Data inputs
instruction => instruction_pin, --: in instruction_word_t;
+ prog_cnt => prog_cnt_pin,
reg_w_addr => reg_w_addr_pin, --: in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
reg_wr_data => reg_wr_data_pin, --: in gp_register_t;
reg_we => reg_we_pin, --: in std_logic;
exec_st : execute_stage
generic map('0')
- 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,
- data_pin, alu_jump_pin,brpr_pin, wr_en_pin, dmem_pin,dmem_wr_en_pin,hword_pin,byte_s_pin);
-
- writeback_st : writeback_stage
+ port map(sys_clk, sys_res,to_next_stage, reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, gpm_in_pin, result_pin, result_addr_pin,addr_pin,
+ data_pin, alu_jump_pin,brpr_pin, wr_en_pin, dmem_pin,dmem_wr_en_pin,hword_pin,byte_s_pin, gpm_out_pin);
+
+
+ vers_nxt.result <= result_pin;
+ vers_nxt.result_addr <= result_addr_pin;
+ vers_nxt.address <= addr_pin;
+ vers_nxt.ram_data <= data_pin;
+ vers_nxt.alu_jmp <= alu_jump_pin;
+ vers_nxt.br_pred <= brpr_pin;
+ vers_nxt.write_en <= wr_en_pin;
+ vers_nxt.dmem_en <= dmem_pin;
+ vers_nxt.dmem_write_en <= dmem_wr_en_pin;
+ vers_nxt.hword <= hword_pin;
+ vers_nxt.byte_s <= byte_s_pin;
+
+-- writeback_st : writeback_stage
+-- generic map('0', '1')
+-- port map(sys_clk, sys_res, result_pin, result_addr_pin, addr_pin, data_pin, alu_jump_pin, brpr_pin,
+-- wr_en_pin, dmem_pin, dmem_wr_en_pin, hword_pin, byte_s_pin,
+-- reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, jump_result_pin, alu_jump_bit_pin,bus_tx, sseg0, sseg1, sseg2, sseg3);
+--
+
+ writeback_st : writeback_stage
generic map('0', '1')
- port map(sys_clk, sys_res, result_pin, result_addr_pin, addr_pin, data_pin, alu_jump_pin, brpr_pin,
- wr_en_pin, dmem_pin, dmem_wr_en_pin, hword_pin, byte_s_pin,
- reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, jump_result_pin, alu_jump_bit_pin);
+ port map(sys_clk, sys_res, vers_nxt.result, vers_nxt.result_addr, vers_nxt.address, vers_nxt.ram_data, vers_nxt.alu_jmp, vers_nxt.br_pred,
+ vers_nxt.write_en, vers_nxt.dmem_en, vers_nxt.dmem_write_en, vers_nxt.hword, vers_nxt.byte_s,
+ reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, jump_result_pin, alu_jump_bit_pin,bus_tx, sseg0, sseg1, sseg2, sseg3);
- gpmp_inst : extension
- generic map ('0')
- port map (
- sys_clk,
- sys_reset,
- ext_gpmp,
- pointer,
- dec_in,
- p_en,
- data_out,
- pointer_val
-
- );
+syn: process(sys_clk, sys_res)
+
+begin
+
+ if sys_res = '0' then
+ vers.result <= (others => '0');
+ vers.result_addr <= (others => '0');
+ vers.address <= (others => '0');
+ vers.ram_data <= (others => '0');
+ vers.alu_jmp <= '0';
+ vers.br_pred <= '0';
+ vers.write_en <= '0';
+ vers.dmem_en <= '0';
+ vers.dmem_write_en <= '0';
+ vers.hword <= '0';
+ vers.byte_s <= '0';
+ elsif rising_edge(sys_clk) then
+ vers <= vers_nxt;
+ end if;
+
+end process;
--init : process(all)
--end process;
- result <= result_pin;
- nop_pin <= (alu_jump_bit_pin xor brpr_pin);
+-- result <= result_pin;
+ nop_pin <= (alu_jump_bit_pin); -- xor brpr_pin);
+
+ jump_result <= prog_cnt_pin; --jump_result_pin;
+-- sys_res <= '1';
- jump_result <= jump_result_pin;
+-- reg_wr_data <= reg_wr_data_pin;
- reg_wr_data <= reg_wr_data_pin;
end behav;
projects / calu.git / blobdiff