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158 lines
4.0 KiB
Verilog
158 lines
4.0 KiB
Verilog
`timescale 1ns/1ps
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module core_tb();
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initial $timeformat(-9, 2, " ns", 20);
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initial begin: dump
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integer i;
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$dumpfile("core_tb.vcd");
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$dumpvars(0, core_tb);
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for (i=0; i<32; i=i+1) begin
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$dumpvars(0, dut.regfile[i]);
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end
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end
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reg clk, reset;
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wire dummy_out;
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// Memory Parameters
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localparam MEM_ROM_LENGTH = 2048 >> 2; // words
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localparam MEM_LENGTH = MEM_ROM_LENGTH + 2048 >> 2; // words
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localparam DATA_INVALID = 32'hdeadbeef;
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// Memory
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reg [31:0] mem [0:MEM_LENGTH-1];
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initial $readmemh("text.hex", mem);
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// Instruction Memory
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wire [31:0] mem_inst_addr;
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wire [31:0] mem_inst_idx = mem_inst_addr >> 2;
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wire [31:0] mem_inst_data = mem_inst_idx < MEM_LENGTH ? mem[mem_inst_idx] : DATA_INVALID;
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// Data memory
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wire [31:0] mem_data_addr;
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wire [31:0] mem_data_idx = (mem_data_addr) >> 2;
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wire [31:0] mem_data_rdata = mem_data_idx < MEM_LENGTH ? mem[mem_data_idx] : DATA_INVALID;
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wire [31:0] mem_data_wdata;
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wire [3:0] mem_data_wmask;
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wire mem_data_we;
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always @(posedge clk) begin
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if (mem_data_idx < MEM_LENGTH && mem_data_idx >= MEM_ROM_LENGTH) begin
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if (mem_data_we) begin
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if (mem_data_wmask[0]) begin
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mem[mem_data_idx][7:0] <= mem_data_wdata[7:0];
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end
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if (mem_data_wmask[1]) begin
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mem[mem_data_idx][15:8] <= mem_data_wdata[15:8];
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end
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if (mem_data_wmask[2]) begin
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mem[mem_data_idx][23:16] <= mem_data_wdata[23:16];
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end
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if (mem_data_wmask[3]) begin
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mem[mem_data_idx][31:24] <= mem_data_wdata[31:24];
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end
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end
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end else begin
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// ignore illegal writes
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end
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end
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// Main control
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initial begin
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#0
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clk = 0;
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reset = 1;
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#10
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reset = 0;
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#5000
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reset = 1;
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$finish;
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end
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always #2 clk = !clk;
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core dut(
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.clk(clk),
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.reset(reset),
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.mem_inst_addr(mem_inst_addr),
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.mem_inst_data(mem_inst_data),
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.mem_data_addr(mem_data_addr),
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.mem_data_rdata(mem_data_rdata),
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.mem_data_wdata(mem_data_wdata),
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.mem_data_wmask(mem_data_wmask),
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.mem_data_we(mem_data_we),
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// .mem_data_addr(mem_data_addr),
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// .mem_data_wdata(mem_data_wdata),
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// .mem_data_rdata(mem_data_rdata),
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// .mem_data_en(mem_data_en),
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// .mem_data_we(mem_data_we),
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// .mem_data_valid(mem_data_valid),
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// .mem_data_done(mem_data_done)
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.dummy_out(dummy_out)
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);
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// wire axi_mem_data_awvalid;
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// wire [11:0] axi_mem_data_awaddr;
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// wire [2:0] axi_mem_data_awprot;
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// wire axi_mem_data_awready;
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// wire axi_mem_data_wvalid;
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// wire [31:0] axi_mem_data_wdata;
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// wire [3:0] axi_mem_data_wstrb;
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// wire axi_mem_data_wready;
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// wire axi_mem_data_bvalid;
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// wire axi_mem_data_bready;
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// wire [1:0] axi_mem_data_bresp;
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// wire axi_mem_data_arvalid;
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// wire [11:0] axi_mem_data_araddr;
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// wire [2:0] axi_mem_data_arprot;
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// wire axi_mem_data_arready;
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// wire axi_mem_data_rvalid;
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// wire [31:0] axi_mem_data_rdata;
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// wire [1:0] axi_mem_data_resp;
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// wire axi_mem_data_rready;
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// axi_lite_memory axi_mem_data(
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// .ACLK(clk),
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// .ARESETn(!reset),
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// .AWVALID(axi_mem_data_awvalid),
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// .AWADDR(axi_mem_data_awaddr),
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// .AWPROT(axi_mem_data_awprot),
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// .AWREADY(axi_mem_data_awready),
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// .WVALID(axi_mem_data_wvalid),
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// .WDATA(axi_mem_data_wdata),
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// .WSTRB(axi_mem_data_wstrb),
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// .WREADY(axi_mem_data_wready),
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// .BVALID(axi_mem_data_bvalid),
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// .BREADY(axi_mem_data_bready),
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// .BRESP(axi_mem_data_bresp),
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// .ARVALID(axi_mem_data_arvalid),
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// .ARADDR(axi_mem_data_araddr),
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// .ARPROT(axi_mem_data_arprot),
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// .ARREADY(axi_mem_data_arready),
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// .RVALID(axi_mem_data_rvalid),
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// .RDATA(axi_mem_data_rdata),
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// .RRESP(axi_mem_data_resp),
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// .RREADY(axi_mem_data_rready),
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// .WB_WADDR(mem_data_waddr),
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// .WB_WPROT(),
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// .WB_WDATA(mem_data_wdata),
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// .WB_WSTRB(mem_data_wmask),
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// .WB_WVALID(mem_data_we),
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// .WB_WREADY(1'b1),
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// .WB_RADDR(mem_data_raddr),
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// .WB_RDATA(mem_data_rdata),
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// .WB_RVALID(1'b1),
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// .WB_RREADY()
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// );
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endmodule |