/*                                                                      
 Copyright 2021 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.                                          
 */

module tb_top_verilator #(

    ) (
       input wire  clk_i,
       input wire  rst_ni
    );

    wire halted;

    wire[31:0] x26 = u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.regs[26];
    wire[31:0] x27 = u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.regs[27];

    initial begin: load_prog
        automatic logic [1023:0] firmware;

        if($value$plusargs("firmware=%s", firmware)) begin
            $display("[TESTBENCH] %t: loading firmware %0s ...",
                     $time, firmware);
            $readmemh (firmware, u_tinyriscv_soc_top.u_rom.u_gen_ram.ram);
        end else begin
            $display("No firmware specified");
        end
    end

    reg result_printed;

    always @(posedge clk_i or negedge rst_ni) begin
        if (!rst_ni) begin
            result_printed <= 1'b0;
        end else begin
            if (!result_printed) begin
                if (x26 == 32'b1) begin
                    if (x27 == 32'b1) begin
                        $display("~~~~~~~~~~~~~~~~~~~ TEST_PASS ~~~~~~~~~~~~~~~~~~~");
                        $display("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                        $display("~~~~~~~~~ #####     ##     ####    #### ~~~~~~~~~");
                        $display("~~~~~~~~~ #    #   #  #   #       #     ~~~~~~~~~");
                        $display("~~~~~~~~~ #    #  #    #   ####    #### ~~~~~~~~~");
                        $display("~~~~~~~~~ #####   ######       #       #~~~~~~~~~");
                        $display("~~~~~~~~~ #       #    #  #    #  #    #~~~~~~~~~");
                        $display("~~~~~~~~~ #       #    #   ####    #### ~~~~~~~~~");
                        $display("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                    end else begin
                        $display("~~~~~~~~~~~~~~~~~~~ TEST_FAIL ~~~~~~~~~~~~~~~~~~~~");
                        $display("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                        $display("~~~~~~~~~~######    ##       #    #     ~~~~~~~~~~");
                        $display("~~~~~~~~~~#        #  #      #    #     ~~~~~~~~~~");
                        $display("~~~~~~~~~~#####   #    #     #    #     ~~~~~~~~~~");
                        $display("~~~~~~~~~~#       ######     #    #     ~~~~~~~~~~");
                        $display("~~~~~~~~~~#       #    #     #    #     ~~~~~~~~~~");
                        $display("~~~~~~~~~~#       #    #     #    ######~~~~~~~~~~");
                        $display("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                    end
                    result_printed <= 1'b1;
                end
            end
        end
    end

    tinyriscv_soc_top u_tinyriscv_soc_top(
        .clk_50m_i(clk_i),
        .rst_ext_ni(rst_ni),
        .halted_ind_pin(halted)
    );

    wire display_regs = 1'b0;

    wire write_gpr_reg = u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.we_i;
    wire[4:0] write_gpr_addr = u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.waddr_i;

    wire write_csr_reg = u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.exu_we_i;
    wire[31:0] write_csr_addr = u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.exu_waddr_i;

    always @ (posedge clk_i) begin
        if (halted && write_gpr_reg && display_regs && (write_gpr_addr == 5'd31)) begin
            $display("\n");
            $display("ra = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.ra);
            $display("sp = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.sp);
            $display("gp = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.gp);
            $display("tp = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.tp);
            $display("t0 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t0);
            $display("t1 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t1);
            $display("t2 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t2);
            $display("s0 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s0);
            $display("fp = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.fp);
            $display("s1 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s1);
            $display("a0 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a0);
            $display("a1 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a1);
            $display("a2 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a2);
            $display("a3 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a3);
            $display("a4 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a4);
            $display("a5 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a5);
            $display("a6 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a6);
            $display("a7 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.a7);
            $display("s2 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s2);
            $display("s3 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s3);
            $display("s4 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s4);
            $display("s5 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s5);
            $display("s6 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s6);
            $display("s7 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s7);
            $display("s8 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s8);
            $display("s9 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s9);
            $display("s10 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s10);
            $display("s11 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.s11);
            $display("t3 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t3);
            $display("t4 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t4);
            $display("t5 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t5);
            $display("t6 = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_gpr_reg.t6);
        end else if (halted && write_csr_reg && display_regs && (write_csr_addr[11:0] == 12'hc00)) begin
            $display("\n");
            $display("misa = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.misa);
            $display("cycle = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.cycle[31:0]);
            $display("cycleh = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.cycle[63:32]);
            $display("mtvec = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.mtvec);
            $display("mstatus = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.mstatus);
            $display("mepc = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.mepc);
            $display("mie = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.mie);
            $display("dpc = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.dpc);
            $display("dcsr = 0x%x", u_tinyriscv_soc_top.u_tinyriscv_core.u_csr_reg.dcsr);
        end
    end

endmodule // tb_top_verilator