/* Copyright 2019 Blue Liang, liangkangnan@163.com Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ `include "defines.sv" // tinyriscv处理器核顶层模块 module tinyriscv_core #( parameter int unsigned DEBUG_HALT_ADDR = 32'h10000800, parameter int unsigned DEBUG_EXCEPTION_ADDR = 32'h10000808, parameter bit BranchPredictor = 1'b1, parameter bit TRACE_ENABLE = 1'b0 )( input wire clk, input wire rst_n, // instr fetch interface output wire instr_req_o, input wire instr_gnt_i, input wire instr_rvalid_i, output wire[31:0] instr_addr_o, input wire[31:0] instr_rdata_i, input wire instr_err_i, // data access interface output wire data_req_o, input wire data_gnt_i, input wire data_rvalid_i, output wire data_we_o, output wire[3:0] data_be_o, output wire[31:0] data_addr_o, output wire[31:0] data_wdata_o, input wire[31:0] data_rdata_i, input wire data_err_i, // interrupt input input wire int_req_i, input wire[7:0] int_id_i, // debug request signal input wire debug_req_i ); // ifu模块输出信号 wire[31:0] ifetch_inst_o; wire[31:0] ifetch_pc_o; wire ifetch_inst_valid_o; // ifu_idu模块输出信号 wire[31:0] if_inst_o; wire[31:0] if_inst_addr_o; wire if_inst_valid_o; wire if_ready_o; // idu模块输出信号 wire[31:0] id_inst_o; wire[31:0] id_inst_addr_o; wire[`DECINFO_WIDTH-1:0] id_dec_info_bus_o; wire[31:0] id_dec_imm_o; wire[31:0] id_dec_pc_o; wire[4:0] id_rs1_raddr_o; wire[4:0] id_rs2_raddr_o; wire[4:0] id_rd_waddr_o; wire id_rd_we_o; wire id_stall_o; 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; wire[31:0] ie_inst_addr_o; wire[`DECINFO_WIDTH-1:0] ie_dec_info_bus_o; wire[31:0] ie_dec_imm_o; wire[31:0] ie_dec_pc_o; wire[31:0] ie_rs1_rdata_o; wire[31:0] ie_rs2_rdata_o; wire[4:0] ie_rd_waddr_o; wire ie_rd_we_o; wire ie_inst_valid_o; // exu模块输出信号 wire[31:0] ex_mem_wdata_o; wire[31:0] ex_mem_addr_o; wire ex_mem_we_o; wire[3:0] ex_mem_sel_o; wire ex_mem_req_valid_o; wire ex_mem_rsp_ready_o; wire ex_mem_access_misaligned_o; wire[31:0] ex_reg_wdata_o; wire ex_reg_we_o; wire[4:0] ex_reg_waddr_o; wire ex_hold_flag_o; wire ex_jump_flag_o; wire[31:0] ex_jump_addr_o; wire[31:0] ex_csr_wdata_o; wire ex_csr_we_o; wire[31:0] ex_csr_waddr_o; wire[31:0] ex_csr_raddr_o; wire ex_inst_ecall_o; wire ex_inst_ebreak_o; wire ex_inst_mret_o; wire ex_inst_dret_o; wire ex_inst_valid_o; wire ex_inst_executed_o; // gpr_reg模块输出信号 wire[31:0] regs_rdata1_o; wire[31:0] regs_rdata2_o; // csr_reg模块输出信号 wire[31:0] csr_ex_data_o; wire[31:0] csr_clint_data_o; wire[31:0] csr_mtvec_o; wire[31:0] csr_mepc_o; wire[31:0] csr_mstatus_o; wire[31:0] csr_mie_o; wire[31:0] csr_dpc_o; wire[31:0] csr_dcsr_o; wire csr_trigger_match_o; // pipe_ctrl模块输出信号 wire[31:0] ctrl_flush_addr_o; wire ctrl_flush_o; wire[`STALL_WIDTH-1:0] ctrl_stall_o; // exception模块输出信号 wire excep_csr_we_o; wire[31:0] excep_csr_waddr_o; wire[31:0] excep_csr_wdata_o; wire excep_stall_flag_o; wire[31:0] excep_int_addr_o; wire excep_int_assert_o; ifu #( .BranchPredictor(BranchPredictor) ) u_ifu ( .clk(clk), .rst_n(rst_n), .flush_addr_i(ctrl_flush_addr_o), .stall_i(ctrl_stall_o), .flush_i(ctrl_flush_o), .id_ready_i(if_ready_o), .inst_o(ifetch_inst_o), .pc_o(ifetch_pc_o), .inst_valid_o(ifetch_inst_valid_o), .instr_req_o(instr_req_o), .instr_gnt_i(instr_gnt_i), .instr_rvalid_i(instr_rvalid_i), .instr_addr_o(instr_addr_o), .instr_rdata_i(instr_rdata_i), .instr_err_i(instr_err_i) ); pipe_ctrl u_pipe_ctrl( .clk(clk), .rst_n(rst_n), .stall_from_id_i(id_stall_o), .stall_from_ex_i(ex_hold_flag_o), .stall_from_jtag_i(1'b0), .stall_from_clint_i(excep_stall_flag_o), .jump_assert_i(ex_jump_flag_o), .jump_addr_i(ex_jump_addr_o), .flush_o(ctrl_flush_o), .stall_o(ctrl_stall_o), .flush_addr_o(ctrl_flush_addr_o) ); gpr_reg u_gpr_reg( .clk(clk), .rst_n(rst_n), .we_i(ex_reg_we_o), .waddr_i(ex_reg_waddr_o), .wdata_i(ex_reg_wdata_o), .raddr1_i(id_rs1_raddr_o), .rdata1_o(regs_rdata1_o), .raddr2_i(id_rs2_raddr_o), .rdata2_o(regs_rdata2_o) ); csr_reg u_csr_reg( .clk(clk), .rst_n(rst_n), .pc_if_i(ie_dec_pc_o), .trigger_match_o(csr_trigger_match_o), .exu_we_i(ex_csr_we_o), .exu_raddr_i(ex_csr_raddr_o), .exu_waddr_i(ex_csr_waddr_o), .exu_wdata_i(ex_csr_wdata_o), .exu_rdata_o(csr_ex_data_o), .excep_we_i(excep_csr_we_o), .excep_waddr_i(excep_csr_waddr_o), .excep_wdata_i(excep_csr_wdata_o), .mtvec_o(csr_mtvec_o), .mepc_o(csr_mepc_o), .mstatus_o(csr_mstatus_o), .mie_o(csr_mie_o), .dpc_o(csr_dpc_o), .dcsr_o(csr_dcsr_o) ); ifu_idu u_ifu_idu( .clk(clk), .rst_n(rst_n), .inst_i(ifetch_inst_o), .inst_addr_i(ifetch_pc_o), .stall_i(ctrl_stall_o), .flush_i(ctrl_flush_o), .inst_valid_i(ifetch_inst_valid_o), .ready_o(if_ready_o), .inst_valid_o(if_inst_valid_o), .inst_o(if_inst_o), .inst_addr_o(if_inst_addr_o) ); idu u_idu( .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), .stall_o(id_stall_o), .illegal_inst_o(id_illegal_inst_o), .dec_info_bus_o(id_dec_info_bus_o), .dec_imm_o(id_dec_imm_o), .dec_pc_o(id_dec_pc_o), .rs1_raddr_o(id_rs1_raddr_o), .rs2_raddr_o(id_rs2_raddr_o), .rd_waddr_o(id_rd_waddr_o), .rd_we_o(id_rd_we_o) ); idu_exu u_idu_exu( .clk(clk), .rst_n(rst_n), .inst_i(id_inst_o), .stall_i(ctrl_stall_o), .flush_i(ctrl_flush_o), .dec_info_bus_i(id_dec_info_bus_o), .dec_imm_i(id_dec_imm_o), .dec_pc_i(id_dec_pc_o), .rs1_rdata_i(id_rs1_rdata_o), .rs2_rdata_i(id_rs2_rdata_o), .rd_waddr_i(id_rd_waddr_o), .rd_we_i(id_rd_we_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), .dec_imm_o(ie_dec_imm_o), .dec_pc_o(ie_dec_pc_o), .rs1_rdata_o(ie_rs1_rdata_o), .rs2_rdata_o(ie_rs2_rdata_o), .rd_waddr_o(ie_rd_waddr_o), .rd_we_o(ie_rd_we_o) ); exu #( .BranchPredictor(BranchPredictor) ) u_exu ( .clk(clk), .rst_n(rst_n), .reg1_rdata_i(ie_rs1_rdata_o), .reg2_rdata_i(ie_rs2_rdata_o), .mem_rdata_i(data_rdata_i), .mem_gnt_i(data_gnt_i), .mem_rvalid_i(data_rvalid_i), .mem_wdata_o(data_wdata_o), .mem_addr_o(data_addr_o), .mem_we_o(data_we_o), .mem_be_o(data_be_o), .mem_req_o(data_req_o), .mem_access_misaligned_o(ex_mem_access_misaligned_o), .reg_wdata_o(ex_reg_wdata_o), .reg_we_o(ex_reg_we_o), .reg_waddr_o(ex_reg_waddr_o), .hold_flag_o(ex_hold_flag_o), .jump_flag_o(ex_jump_flag_o), .jump_addr_o(ex_jump_addr_o), .int_assert_i(excep_int_assert_o), .int_addr_i(excep_int_addr_o), .inst_ecall_o(ex_inst_ecall_o), .inst_ebreak_o(ex_inst_ebreak_o), .inst_mret_o(ex_inst_mret_o), .inst_dret_o(ex_inst_dret_o), .int_stall_i(excep_stall_flag_o), .csr_raddr_o(ex_csr_raddr_o), .csr_rdata_i(csr_ex_data_o), .csr_wdata_o(ex_csr_wdata_o), .csr_we_o(ex_csr_we_o), .csr_waddr_o(ex_csr_waddr_o), .inst_valid_o(ex_inst_valid_o), .inst_valid_i(ie_inst_valid_o), .inst_executed_o(ex_inst_executed_o), .inst_i(ie_inst_o), .dec_info_bus_i(ie_dec_info_bus_o), .dec_imm_i(ie_dec_imm_o), .dec_pc_i(ie_dec_pc_o), .next_pc_i(if_inst_addr_o), .rd_waddr_i(ie_rd_waddr_o), .rd_we_i(ie_rd_we_o) ); exception u_exception( .clk(clk), .rst_n(rst_n), .illegal_inst_i(id_illegal_inst_o), .inst_valid_i(ie_inst_valid_o), .inst_executed_i(ex_inst_executed_o), .inst_ecall_i(ex_inst_ecall_o), .inst_ebreak_i(ex_inst_ebreak_o), .inst_mret_i(ex_inst_mret_o), .inst_dret_i(ex_inst_dret_o), .inst_addr_i(ie_dec_pc_o), .mtvec_i(csr_mtvec_o), .mepc_i(csr_mepc_o), .mstatus_i(csr_mstatus_o), .mie_i(csr_mie_o), .dpc_i(csr_dpc_o), .dcsr_i(csr_dcsr_o), .trigger_match_i(csr_trigger_match_o), .int_req_i(int_req_i), .int_id_i(int_id_i), .debug_halt_addr_i(DEBUG_HALT_ADDR), .debug_req_i(debug_req_i), .csr_we_o(excep_csr_we_o), .csr_waddr_o(excep_csr_waddr_o), .csr_wdata_o(excep_csr_wdata_o), .stall_flag_o(excep_stall_flag_o), .int_addr_o(excep_int_addr_o), .int_assert_o(excep_int_assert_o) ); if (TRACE_ENABLE) begin: instr_trace tracer u_tracer( .clk(clk), .rst_n(rst_n), .inst_i(ie_inst_o), .pc_i(ie_dec_pc_o), .inst_valid_i(ex_inst_valid_o) ); end endmodule