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temp commit 

Signed-off-by: liangkangnan <liangkangnan@163.com>
pull/4/head
liangkangnan 2021-06-18 20:04:46 +08:00
parent 4e99bd4f33
commit 5f56e8d0fb
5 changed files with 94 additions and 77 deletions
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22
rtl/core/exu.sv
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@ -19,10 +19,10 @@
// 执行模块
module exu(
input wire clk,
input wire rst_n,
input wire clk, // 时钟
input wire rst_n, // 复位
// clint
// exception
input wire int_assert_i, // 中断发生标志
input wire[31:0] int_addr_i, // 中断跳转地址
input wire int_stall_i, // 暂停标志
@ -33,22 +33,22 @@ module exu(
// mem
input wire[31:0] mem_rdata_i, // 内存输入数据
input wire mem_gnt_i,
input wire mem_rvalid_i,
input wire mem_gnt_i, // 总线授权
input wire mem_rvalid_i, // 总线响应
output wire[31:0] mem_wdata_o, // 写内存数据
output wire[31:0] mem_addr_o, // 读、写内存地址
output wire mem_we_o, // 是否要写内存
output wire[3:0] mem_be_o, // 字节位
output wire mem_req_o,
output wire mem_access_misaligned_o,
output wire mem_req_o, // 访存请求
output wire mem_access_misaligned_o, // 访存不对齐
// gpr_reg
// to gpr_reg
output wire[31:0] reg_wdata_o, // 写寄存器数据
output wire reg_we_o, // 是否要写通用寄存器
output wire[4:0] reg_waddr_o, // 写通用寄存器地址
// csr_reg
input wire[31:0] csr_rdata_i,
input wire[31:0] csr_rdata_i, // CSR寄存器数据
output wire[31:0] csr_raddr_o, // 读CSR寄存器地址
output wire[31:0] csr_wdata_o, // 写CSR寄存器数据
output wire csr_we_o, // 是否要写CSR寄存器
@ -60,8 +60,8 @@ module exu(
output wire[31:0] jump_addr_o, // 跳转目的地址
//
output wire inst_valid_o,
output wire inst_executed_o,
output wire inst_valid_o, // 指令有效
output wire inst_executed_o, // 指令已经执行完毕
// from idu_exu
input wire inst_valid_i,

101
rtl/core/idu.sv
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@ -20,52 +20,59 @@
// 纯组合逻辑电路
module idu(
input wire clk,
input wire rst_n,
input wire clk, // 时钟
input wire rst_n, // 复位
// from if_id
input wire[31:0] inst_i, // 指令内容
input wire[31:0] inst_addr_i, // 指令地址
// from ifu_idu
input wire[31:0] inst_i, // 指令内容
input wire[31:0] inst_addr_i, // 指令地址
input wire inst_valid_i, // 指令有效
// from gpr_reg
input wire[31:0] rs1_rdata_i, // 通用寄存器1输入数据
input wire[31:0] rs2_rdata_i, // 通用寄存器2输入数据
input wire[31:0] rs1_rdata_i, // 通用寄存器1输入数据
input wire[31:0] rs2_rdata_i, // 通用寄存器2输入数据
output wire stall_o,
output wire illegal_inst_o,
output wire stall_o, // 流水线暂停
output wire illegal_inst_o, // 非法指令
// to id_ex
output wire[31:0] inst_o,
output wire[`DECINFO_WIDTH-1:0] dec_info_bus_o,
output wire[31:0] dec_imm_o,
output wire[31:0] dec_pc_o,
output wire[4:0] rs1_raddr_o,
output wire[4:0] rs2_raddr_o,
output wire[31:0] rs1_rdata_o,
output wire[31:0] rs2_rdata_o,
output wire[4:0] rd_waddr_o,
output wire rd_we_o
// to gpr_reg
output wire[4:0] rs1_raddr_o, // 寄存器1地址
output wire[4:0] rs2_raddr_o, // 寄存器2地址
// to idu_exu
output wire inst_valid_o, // 指令有效
output wire[31:0] inst_o, // 指令内容
output wire[`DECINFO_WIDTH-1:0] dec_info_bus_o, // 译码信息
output wire[31:0] dec_imm_o, // 立即数
output wire[31:0] dec_pc_o, // 指令地址
output wire[31:0] rs1_rdata_o, // 寄存器1数据
output wire[31:0] rs2_rdata_o, // 寄存器2数据
output wire[4:0] rd_waddr_o, // 写寄存器地址
output wire rd_we_o // 写寄存器使能
);
assign inst_o = inst_i;
wire[31:0] inst = inst_valid_i? inst_i: `INST_NOP;
assign inst_valid_o = inst_valid_i;
assign inst_o = inst;
assign rs1_rdata_o = rs1_rdata_i;
assign rs2_rdata_o = rs2_rdata_i;
// 取出指令中的每一个域
wire[6:0] opcode = inst_i[6:0];
wire[2:0] funct3 = inst_i[14:12];
wire[6:0] funct7 = inst_i[31:25];
wire[4:0] rd = inst_i[11:7];
wire[4:0] rs1 = inst_i[19:15];
wire[4:0] rs2 = inst_i[24:20];
wire[11:0] type_i_imm_11_0 = inst_i[31:20];
wire[6:0] type_s_imm_11_5 = inst_i[31:25];
wire[4:0] type_s_imm_4_0 = inst_i[11:7];
wire[6:0] type_b_imm_12_10_5 = inst_i[31:25];
wire[4:0] type_b_imm_4_1_11 = inst_i[11:7];
wire[19:0] type_u_imm_31_12 = inst_i[31:12];
wire[19:0] type_j_imm_31_12 = inst_i[31:12];
wire[6:0] opcode = inst[6:0];
wire[2:0] funct3 = inst[14:12];
wire[6:0] funct7 = inst[31:25];
wire[4:0] rd = inst[11:7];
wire[4:0] rs1 = inst[19:15];
wire[4:0] rs2 = inst[24:20];
wire[11:0] type_i_imm_11_0 = inst[31:20];
wire[6:0] type_s_imm_11_5 = inst[31:25];
wire[4:0] type_s_imm_4_0 = inst[11:7];
wire[6:0] type_b_imm_12_10_5 = inst[31:25];
wire[4:0] type_b_imm_4_1_11 = inst[11:7];
wire[19:0] type_u_imm_31_12 = inst[31:12];
wire[19:0] type_j_imm_31_12 = inst[31:12];
// 指令opcode域的取值
wire opcode_0110111 = (opcode == 7'b0110111);
@ -138,8 +145,8 @@ module idu(
wire inst_or = opcode_0110011 & funct3_110 & funct7_0000000;
wire inst_and = opcode_0110011 & funct3_111 & funct7_0000000;
wire inst_fence = opcode_0001111 & funct3_000;
wire inst_ecall = (inst_i == `INST_ECALL);
wire inst_ebreak = (inst_i == `INST_EBREAK);
wire inst_ecall = (inst == `INST_ECALL);
wire inst_ebreak = (inst == `INST_EBREAK);
wire inst_fence_i = opcode_0001111 & funct3_001;
wire inst_csrrw = opcode_1110011 & funct3_001;
wire inst_csrrs = opcode_1110011 & funct3_010;
@ -155,9 +162,9 @@ module idu(
wire inst_divu = opcode_0110011 & funct3_101 & funct7_0000001;
wire inst_rem = opcode_0110011 & funct3_110 & funct7_0000001;
wire inst_remu = opcode_0110011 & funct3_111 & funct7_0000001;
wire inst_nop = (inst_i == `INST_NOP);
wire inst_mret = (inst_i == `INST_MRET);
wire inst_dret = (inst_i == `INST_DRET);
wire inst_nop = (inst == `INST_NOP);
wire inst_mret = (inst == `INST_MRET);
wire inst_dret = (inst == `INST_DRET);
// 将指令分类
wire inst_type_load = opcode_0000011;
@ -211,7 +218,7 @@ module idu(
assign dec_csr_info_bus[`DECINFO_CSR_CSRRS] = inst_csrrs | inst_csrrsi;
assign dec_csr_info_bus[`DECINFO_CSR_CSRRC] = inst_csrrc | inst_csrrci;
assign dec_csr_info_bus[`DECINFO_CSR_RS1IMM] = inst_csrrwi | inst_csrrsi | inst_csrrci;
assign dec_csr_info_bus[`DECINFO_CSR_CSRADDR] = inst_i[31:20];
assign dec_csr_info_bus[`DECINFO_CSR_CSRADDR] = inst[31:20];
wire[`DECINFO_MEM_BUS_WIDTH-1:0] dec_mem_info_bus;
assign dec_mem_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_MEM;
@ -234,13 +241,13 @@ module idu(
assign dec_sys_info_bus[`DECINFO_SYS_FENCE] = inst_fence | inst_fence_i;
// 指令中的立即数
wire[31:0] inst_u_type_imm = {inst_i[31:12], 12'b0};
wire[31:0] inst_j_type_imm = {{12{inst_i[31]}}, inst_i[19:12], inst_i[20], inst_i[30:21], 1'b0};
wire[31:0] inst_b_type_imm = {{20{inst_i[31]}}, inst_i[7], inst_i[30:25], inst_i[11:8], 1'b0};
wire[31:0] inst_s_type_imm = {{20{inst_i[31]}}, inst_i[31:25], inst_i[11:7]};
wire[31:0] inst_i_type_imm = {{20{inst_i[31]}}, inst_i[31:20]};
wire[31:0] inst_csr_type_imm = {27'h0, inst_i[19:15]};
wire[31:0] inst_shift_type_imm = {27'h0, inst_i[24:20]};
wire[31:0] inst_u_type_imm = {inst[31:12], 12'b0};
wire[31:0] inst_j_type_imm = {{12{inst[31]}}, inst[19:12], inst[20], inst[30:21], 1'b0};
wire[31:0] inst_b_type_imm = {{20{inst[31]}}, inst[7], inst[30:25], inst[11:8], 1'b0};
wire[31:0] inst_s_type_imm = {{20{inst[31]}}, inst[31:25], inst[11:7]};
wire[31:0] inst_i_type_imm = {{20{inst[31]}}, inst[31:20]};
wire[31:0] inst_csr_type_imm = {27'h0, inst[19:15]};
wire[31:0] inst_shift_type_imm = {27'h0, inst[24:20]};
wire inst_sel_u_imm = inst_lui | inst_auipc;
wire inst_sel_j_imm = inst_jal;

14
rtl/core/idu_exu.sv
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@ -19,12 +19,13 @@
// 将译码结果向执行模块传递
module idu_exu(
input wire clk,
input wire rst_n,
input wire clk, // 时钟
input wire rst_n, // 复位
input wire[`STALL_WIDTH-1:0] stall_i, // 流水线暂停
input wire flush_i, // 流水线冲刷
// 输入
input wire[31:0] inst_i,
input wire inst_valid_i,
input wire[`DECINFO_WIDTH-1:0] dec_info_bus_i,
@ -35,6 +36,7 @@ module idu_exu(
input wire[4:0] rd_waddr_i,
input wire rd_we_i,
// 输出
output wire[31:0] inst_o,
output wire inst_valid_o,
output wire[`DECINFO_WIDTH-1:0] dec_info_bus_o,
@ -47,7 +49,7 @@ module idu_exu(
);
wire en = !stall_i[`STALL_EX] | flush_i;
wire en = (~stall_i[`STALL_EX]) | flush_i;
wire[`DECINFO_WIDTH-1:0] i_dec_info_bus = flush_i? {`DECINFO_WIDTH{1'b0}}: dec_info_bus_i;
wire[`DECINFO_WIDTH-1:0] dec_info_bus;
@ -84,14 +86,14 @@ module idu_exu(
gen_en_dff #(1) rd_we_ff(clk, rst_n, en, i_rd_we, rd_we);
assign rd_we_o = rd_we;
wire[31:0] i_inst = flush_i? 32'h0: inst_i;
wire[31:0] i_inst = flush_i? `INST_NOP: inst_i;
wire[31:0] inst;
gen_en_dff #(32) inst_ff(clk, rst_n, en, i_inst, inst);
assign inst_o = inst;
wire i_inst_valid = flush_i? 1'b0: stall_i[`STALL_EX]? 1'b1: inst_valid_i;
wire i_inst_valid = flush_i? 1'b0: inst_valid_i;
wire inst_valid;
gen_en_dff #(1) inst_valid_ff(clk, rst_n, 1'b1, i_inst_valid, inst_valid);
gen_en_dff #(1) inst_valid_ff(clk, rst_n, en, i_inst_valid, inst_valid);
assign inst_valid_o = inst_valid;
endmodule

29
rtl/core/ifu_idu.sv
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@ -16,39 +16,44 @@
`include "defines.sv"
// 将指令向译码模块传递
// 将指令信息向译码模块(通过寄存器)传递
module ifu_idu(
input wire clk,
input wire rst_n,
input wire clk, // 时钟
input wire rst_n, // 复位
input wire[`STALL_WIDTH-1:0] stall_i, // 流水线暂停
input wire flush_i, // 流水线冲刷
input wire[31:0] inst_i, // 指令内容
input wire[31:0] inst_addr_i, // 指令地址
input wire[`STALL_WIDTH-1:0] stall_i, // 流水线暂停
input wire flush_i, // 流水线冲刷
input wire inst_valid_i,
input wire inst_valid_i, // 指令有效
output wire inst_valid_o,
output wire[31:0] inst_o, // 指令内容
output wire[31:0] inst_addr_o // 指令地址
output wire[31:0] inst_addr_o, // 指令地址
output wire inst_valid_o // 指令有效
);
wire en = !stall_i[`STALL_ID] | flush_i;
// 使能信号，只要流水线不暂停就传递
wire en = (~stall_i[`STALL_ID]) | flush_i;
wire[31:0] i_inst = (flush_i)? `INST_NOP: inst_i;
// 指令内容传递，冲刷或指令无效时传递NOP指令
wire[31:0] i_inst = (flush_i | (~inst_valid_i))? `INST_NOP: inst_i;
wire[31:0] inst;
gen_en_dff #(32) inst_ff(clk, rst_n, en, i_inst, inst);
assign inst_o = inst;
// 指令地址传递
wire[31:0] i_inst_addr = flush_i? 32'h0: inst_addr_i;
wire[31:0] inst_addr;
gen_en_dff #(32) inst_addr_ff(clk, rst_n, en, i_inst_addr, inst_addr);
assign inst_addr_o = inst_addr;
wire i_inst_valid = flush_i? 1'b0: stall_i[`STALL_ID]? 1'b1: inst_valid_i;
// 指令有效性传递，冲刷时无效
wire i_inst_valid = flush_i? 1'b0: inst_valid_i;
wire inst_valid;
gen_en_dff #(1) inst_valid_ff(clk, rst_n, 1'b1, i_inst_valid, inst_valid);
gen_en_dff #(1) inst_valid_ff(clk, rst_n, en, i_inst_valid, inst_valid);
assign inst_valid_o = inst_valid;
endmodule

5
rtl/core/tinyriscv_core.sv
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@ -79,6 +79,7 @@ module tinyriscv_core #(
wire[31:0] id_rs1_rdata_o;
wire[31:0] id_rs2_rdata_o;
wire id_illegal_inst_o;
wire id_inst_valid_o;
// idu_exu模块输出信号
wire[31:0] ie_inst_o;
@ -227,9 +228,11 @@ module tinyriscv_core #(
.clk(clk),
.rst_n(rst_n),
.inst_i(if_inst_o),
.inst_valid_i(if_inst_valid_o),
.rs1_rdata_i(regs_rdata1_o),
.rs2_rdata_i(regs_rdata2_o),
.inst_o(id_inst_o),
.inst_valid_o(id_inst_valid_o),
.inst_addr_i(if_inst_addr_o),
.rs1_rdata_o(id_rs1_rdata_o),
.rs2_rdata_o(id_rs2_rdata_o),
@ -257,7 +260,7 @@ module tinyriscv_core #(
.rs2_rdata_i(id_rs2_rdata_o),
.rd_waddr_i(id_rd_waddr_o),
.rd_we_i(id_rd_we_o),
.inst_valid_i(if_inst_valid_o),
.inst_valid_i(id_inst_valid_o),
.inst_valid_o(ie_inst_valid_o),
.inst_o(ie_inst_o),
.dec_info_bus_o(ie_dec_info_bus_o),