/* Copyright 2020 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 "../core/defines.sv" `include "../debug/jtag_def.sv" // tinyriscv soc顶层模块 module tinyriscv_soc_top( input wire clk_50m_i, // 时钟引脚 input wire rst_ext_ni, // 复位引脚，低电平有效 output wire halted_ind_pin, // jtag是否已经halt住CPU，高电平有效 output wire uart_tx_pin, // UART发送引脚 input wire uart_rx_pin, // UART接收引脚 inout wire[1:0] gpio_pins, // GPIO引脚，1bit代表一个GPIO input wire jtag_TCK_pin, // JTAG TCK引脚 input wire jtag_TMS_pin, // JTAG TMS引脚 input wire jtag_TDI_pin, // JTAG TDI引脚 output wire jtag_TDO_pin // JTAG TDO引脚 ); localparam int MASTERS = 3; // Number of master ports `ifdef VERILATOR localparam int SLAVES = 7; // Number of slave ports `else localparam int SLAVES = 6; // Number of slave ports `endif // masters localparam int JtagHost = 0; localparam int CoreD = 1; localparam int CoreI = 2; // slaves localparam int Rom = 0; localparam int Ram = 1; localparam int JtagDevice = 2; localparam int Mtimer = 3; localparam int Gpio = 4; localparam int Uart = 5; `ifdef VERILATOR localparam int SimCtrl = 6; `endif wire master_req [MASTERS]; wire master_gnt [MASTERS]; wire master_rvalid [MASTERS]; wire [31:0] master_addr [MASTERS]; wire master_we [MASTERS]; wire [ 3:0] master_be [MASTERS]; wire [31:0] master_rdata [MASTERS]; wire [31:0] master_wdata [MASTERS]; wire slave_req [SLAVES]; wire slave_gnt [SLAVES]; wire slave_rvalid [SLAVES]; wire [31:0] slave_addr [SLAVES]; wire slave_we [SLAVES]; wire [ 3:0] slave_be [SLAVES]; wire [31:0] slave_rdata [SLAVES]; wire [31:0] slave_wdata [SLAVES]; wire [31:0] slave_addr_mask [SLAVES]; wire [31:0] slave_addr_base [SLAVES]; `ifdef VERILATOR wire sim_jtag_tck; wire sim_jtag_tms; wire sim_jtag_tdi; wire sim_jtag_trstn; wire sim_jtag_tdo; wire [31:0] sim_jtag_exit; `endif wire clk; wire ndmreset; wire ndmreset_n; wire debug_req; wire core_halted; wire mtimer_irq; wire[1:0] io_in; wire[31:0] gpio_ctrl; wire[31:0] gpio_data; `ifdef VERILATOR assign halted_ind_pin = core_halted; `else // FPGA低电平点亮LED assign halted_ind_pin = ~core_halted; `endif tinyriscv_core #( .DEBUG_HALT_ADDR(`DEBUG_ADDR_BASE + `HaltAddress), .DEBUG_EXCEPTION_ADDR(`DEBUG_ADDR_BASE + `ExceptionAddress) ) u_tinyriscv_core ( .clk (clk), .rst_n (ndmreset_n), .instr_req_o (master_req[CoreI]), .instr_gnt_i (master_gnt[CoreI]), .instr_rvalid_i (master_rvalid[CoreI]), .instr_addr_o (master_addr[CoreI]), .instr_rdata_i (master_rdata[CoreI]), .instr_err_i (1'b0), .data_req_o (master_req[CoreD]), .data_gnt_i (master_gnt[CoreD]), .data_rvalid_i (master_rvalid[CoreD]), .data_we_o (master_we[CoreD]), .data_be_o (master_be[CoreD]), .data_addr_o (master_addr[CoreD]), .data_wdata_o (master_wdata[CoreD]), .data_rdata_i (master_rdata[CoreD]), .data_err_i (1'b0), .irq_software_i (1'b0), .irq_timer_i (mtimer_irq), .irq_external_i (1'b0), .irq_fast_i (15'b0), .debug_req_i (debug_req) ); assign slave_addr_mask[Rom] = `ROM_ADDR_MASK; assign slave_addr_base[Rom] = `ROM_ADDR_BASE; // 1.指令存储器 rom #( .DP(`ROM_DEPTH) ) u_rom ( .clk (clk), .rst_n (ndmreset_n), .addr_i (slave_addr[Rom]), .data_i (slave_wdata[Rom]), .sel_i (slave_be[Rom]), .we_i (slave_we[Rom]), .data_o (slave_rdata[Rom]) ); assign slave_addr_mask[Ram] = `RAM_ADDR_MASK; assign slave_addr_base[Ram] = `RAM_ADDR_BASE; // 2.数据存储器 ram #( .DP(`RAM_DEPTH) ) u_ram ( .clk (clk), .rst_n (ndmreset_n), .addr_i (slave_addr[Ram]), .data_i (slave_wdata[Ram]), .sel_i (slave_be[Ram]), .we_i (slave_we[Ram]), .data_o (slave_rdata[Ram]) ); assign slave_addr_mask[Mtimer] = `MTIMER_ADDR_MASK; assign slave_addr_base[Mtimer] = `MTIMER_ADDR_BASE; // 3.机器定时器模块 machine_timer u_machine_timer( .clk (clk), .rst_n (ndmreset_n), .addr_i (slave_addr[Mtimer]), .data_i (slave_wdata[Mtimer]), .sel_i (slave_be[Mtimer]), .we_i (slave_we[Mtimer]), .data_o (slave_rdata[Mtimer]), .irq_o (mtimer_irq) ); // IO0 assign gpio_pins[0] = (gpio_ctrl[1:0] == 2'b01)? gpio_data[0]: 1'bz; assign io_in[0] = gpio_pins[0]; // IO1 assign gpio_pins[1] = (gpio_ctrl[3:2] == 2'b01)? gpio_data[1]: 1'bz; assign io_in[1] = gpio_pins[1]; assign slave_addr_mask[Gpio] = `GPIO_ADDR_MASK; assign slave_addr_base[Gpio] = `GPIO_ADDR_BASE; // 4.GPIO模块 gpio u_gpio( .clk (clk), .rst_n (ndmreset_n), .addr_i (slave_addr[Gpio]), .data_i (slave_wdata[Gpio]), .sel_i (slave_be[Gpio]), .we_i (slave_we[Gpio]), .data_o (slave_rdata[Gpio]), .io_pin_i(io_in), .reg_ctrl(gpio_ctrl), .reg_data(gpio_data) ); assign slave_addr_mask[Uart] = `UART_ADDR_MASK; assign slave_addr_base[Uart] = `UART_ADDR_BASE; // 5.串口模块 uart u_uart( .clk (clk), .rst_n (ndmreset_n), .addr_i (slave_addr[Uart]), .data_i (slave_wdata[Uart]), .sel_i (slave_be[Uart]), .we_i (slave_we[Uart]), .data_o (slave_rdata[Uart]), .tx_pin (uart_tx_pin), .rx_pin (uart_rx_pin) ); `ifdef VERILATOR assign slave_addr_mask[SimCtrl] = `SIM_CTRL_ADDR_MASK; assign slave_addr_base[SimCtrl] = `SIM_CTRL_ADDR_BASE; // 6.仿真控制模块 sim_ctrl u_sim_ctrl( .clk_i (clk), .rst_ni (ndmreset_n), .req_i (), .gnt_o (), .addr_i (slave_addr[SimCtrl]), .we_i (slave_we[SimCtrl]), .be_i (slave_be[SimCtrl]), .wdata_i(slave_wdata[SimCtrl]), .rdata_o(slave_rdata[SimCtrl]) ); `endif obi_interconnect #( .MASTERS(MASTERS), .SLAVES(SLAVES) ) bus ( .clk_i (clk), .rst_ni (ndmreset_n), .master_req_i (master_req), .master_gnt_o (master_gnt), .master_rvalid_o (master_rvalid), .master_we_i (master_we), .master_be_i (master_be), .master_addr_i (master_addr), .master_wdata_i (master_wdata), .master_rdata_o (master_rdata), .slave_addr_mask_i (slave_addr_mask), .slave_addr_base_i (slave_addr_base), .slave_req_o (slave_req), .slave_gnt_i (slave_gnt), .slave_rvalid_i (slave_rvalid), .slave_we_o (slave_we), .slave_be_o (slave_be), .slave_addr_o (slave_addr), .slave_wdata_o (slave_wdata), .slave_rdata_i (slave_rdata) ); `ifdef VERILATOR assign clk = clk_50m_i; `else mmcm_main_clk u_mmcm_main_clk( .clk_out1(clk), .resetn(rst_ext_ni), .clk_in1(clk_50m_i) ); `endif rst_gen #( .RESET_FIFO_DEPTH(5) ) u_rst ( .clk (clk), .rst_ni (rst_ext_ni & (~ndmreset)), .rst_no (ndmreset_n) ); assign slave_addr_mask[JtagDevice] = `DEBUG_ADDR_MASK; assign slave_addr_base[JtagDevice] = `DEBUG_ADDR_BASE; // JTAG module jtag_top #( ) u_jtag_top ( .clk_i (clk), .rst_ni (rst_ext_ni), .debug_req_o (debug_req), .ndmreset_o (ndmreset), .halted_o (core_halted), `ifdef VERILATOR .jtag_tck_i (sim_jtag_tck), .jtag_tdi_i (sim_jtag_tdi), .jtag_tms_i (sim_jtag_tms), .jtag_trst_ni (sim_jtag_trstn), .jtag_tdo_o (sim_jtag_tdo), `else .jtag_tck_i (jtag_TCK_pin), .jtag_tdi_i (jtag_TDI_pin), .jtag_tms_i (jtag_TMS_pin), .jtag_trst_ni (rst_ext_ni), .jtag_tdo_o (jtag_TDO_pin), `endif .master_req_o (master_req[JtagHost]), .master_gnt_i (master_gnt[JtagHost]), .master_rvalid_i (master_rvalid[JtagHost]), .master_we_o (master_we[JtagHost]), .master_be_o (master_be[JtagHost]), .master_addr_o (master_addr[JtagHost]), .master_wdata_o (master_wdata[JtagHost]), .master_rdata_i (master_rdata[JtagHost]), .master_err_i (1'b0), .slave_req_i (slave_req[JtagDevice]), .slave_we_i (slave_we[JtagDevice]), .slave_addr_i (slave_addr[JtagDevice]), .slave_be_i (slave_be[JtagDevice]), .slave_wdata_i (slave_wdata[JtagDevice]), .slave_rdata_o (slave_rdata[JtagDevice]) ); `ifdef VERILATOR sim_jtag #( .TICK_DELAY(10), .PORT(9999) ) u_sim_jtag ( .clock ( clk ), .reset ( ~rst_ext_ni ), .enable ( 1'b1 ), .init_done ( rst_ext_ni ), .jtag_TCK ( sim_jtag_tck ), .jtag_TMS ( sim_jtag_tms ), .jtag_TDI ( sim_jtag_tdi ), .jtag_TRSTn ( sim_jtag_trstn ), .jtag_TDO_data ( sim_jtag_tdo ), .jtag_TDO_driven ( 1'b1 ), .exit ( sim_jtag_exit ) ); always @ (*) begin if (sim_jtag_exit) begin $display("jtag exit..."); $finish(2); end end `endif endmodule