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[/] [openmsp430/] [trunk/] [fpga/] [actel_m1a3pl_dev_kit/] [bench/] [verilog/] [msp_debug.v] - Rev 162
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//---------------------------------------------------------------------------- // Copyright (C) 2001 Authors // // This source file may be used and distributed without restriction provided // that this copyright statement is not removed from the file and that any // derivative work contains the original copyright notice and the associated // disclaimer. // // This source file is free software; you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published // by the Free Software Foundation; either version 2.1 of the License, or // (at your option) any later version. // // This source is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public // License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with this source; if not, write to the Free Software Foundation, // Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA // //---------------------------------------------------------------------------- // // *File Name: msp_debug.v // // *Module Description: // MSP430 core debug utility signals // // *Author(s): // - Olivier Girard, olgirard@gmail.com // //---------------------------------------------------------------------------- // $Rev: 23 $ // $LastChangedBy: olivier.girard $ // $LastChangedDate: 2009-08-30 18:39:26 +0200 (Sun, 30 Aug 2009) $ //---------------------------------------------------------------------------- `ifdef OMSP_NO_INCLUDE `else `include "openMSP430_defines.v" `endif module msp_debug ( // OUTPUTs e_state, // Execution state i_state, // Instruction fetch state inst_cycle, // Cycle number within current instruction inst_full, // Currently executed instruction (full version) inst_number, // Instruction number since last system reset inst_pc, // Instruction Program counter inst_short, // Currently executed instruction (short version) // INPUTs mclk, // Main system clock puc_rst // Main system reset ); // OUTPUTs //============ output [8*32-1:0] e_state; // Execution state output [8*32-1:0] i_state; // Instruction fetch state output [31:0] inst_cycle; // Cycle number within current instruction output [8*32-1:0] inst_full; // Currently executed instruction (full version) output [31:0] inst_number; // Instruction number since last system reset output [15:0] inst_pc; // Instruction Program counter output [8*32-1:0] inst_short; // Currently executed instruction (short version) // INPUTs //============ input mclk; // Main system clock input puc_rst; // Main system reset //============================================================================= // 1) ASCII FORMATING FUNCTIONS //============================================================================= // This function simply concatenates two strings together, ignorning the NULL // at the end of string2. // The specified number of space will be inserted between string1 and string2 function [64*8-1:0] myFormat; input [32*8-1:0] string1; input [32*8-1:0] string2; input [3:0] space; integer i,j; begin myFormat = 0; `ifdef VXL // no +: `else j = 0; for ( i=0; i < 32; i=i+1) // Copy string2 begin myFormat[8*i +: 8] = string2[8*i +: 8]; if ((string2[8*i +: 8] == 0) && (j == 0)) j=i; end for ( i=0; i < space; i=i+1) // Add spaces myFormat[8*(j+i) +: 8] = " "; j=j+space; for ( i=0; i < 32; i=i+1) // Copy string1 myFormat[8*(j+i) +: 8] = string1[8*i +: 8]; `endif end endfunction //============================================================================= // 2) CONNECTIONS TO MSP430 CORE INTERNALS //============================================================================= wire [2:0] i_state_bin = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.i_state; wire [3:0] e_state_bin = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.e_state; wire decode = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.decode; wire [15:0] ir = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.ir; wire irq_detect = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.irq_detect; wire [3:0] irq_num = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.irq_num; wire [15:0] pc = tb_openMSP430_fpga.dut.openMSP430_0.frontend_0.pc; //============================================================================= // 3) GENERATE DEBUG SIGNALS //============================================================================= // Instruction fetch state //========================= reg [8*32-1:0] i_state; always @(i_state_bin) case(i_state_bin) 3'h0 : i_state = "IRQ_FETCH"; 3'h1 : i_state = "IRQ_DONE"; 3'h2 : i_state = "DEC"; 3'h3 : i_state = "EXT1"; 3'h4 : i_state = "EXT2"; 3'h5 : i_state = "IDLE"; default : i_state = "XXXXX"; endcase // Execution state //========================= reg [8*32-1:0] e_state; always @(e_state_bin) case(e_state_bin) 4'h2 : e_state = "IRQ_0"; 4'h1 : e_state = "IRQ_1"; 4'h0 : e_state = "IRQ_2"; 4'h3 : e_state = "IRQ_3"; 4'h4 : e_state = "IRQ_4"; 4'h5 : e_state = "SRC_AD"; 4'h6 : e_state = "SRC_RD"; 4'h7 : e_state = "SRC_WR"; 4'h8 : e_state = "DST_AD"; 4'h9 : e_state = "DST_RD"; 4'hA : e_state = "DST_WR"; 4'hB : e_state = "EXEC"; 4'hC : e_state = "JUMP"; 4'hD : e_state = "IDLE"; default : e_state = "xxxx"; endcase // Count instruction number & cycles //==================================== reg [31:0] inst_number; always @(posedge mclk or posedge puc_rst) if (puc_rst) inst_number <= 0; else if (decode) inst_number <= inst_number+1; reg [31:0] inst_cycle; always @(posedge mclk or posedge puc_rst) if (puc_rst) inst_cycle <= 0; else if (decode) inst_cycle <= 0; else inst_cycle <= inst_cycle+1; // Decode instruction //==================================== // Buffer opcode reg [15:0] opcode; always @(posedge mclk or posedge puc_rst) if (puc_rst) opcode <= 0; else if (decode) opcode <= ir; // Interrupts reg irq; always @(posedge mclk or posedge puc_rst) if (puc_rst) irq <= 1'b1; else if (decode) irq <= irq_detect; // Instruction type reg [8*32-1:0] inst_type; always @(opcode or irq) if (irq) inst_type = "IRQ"; else case(opcode[15:13]) 3'b000 : inst_type = "SIG-OP"; 3'b001 : inst_type = "JUMP"; default : inst_type = "TWO-OP"; endcase // Instructions name reg [8*32-1:0] inst_name; always @(opcode or inst_type or irq_num) if (inst_type=="IRQ") case(irq_num[3:0]) 4'b0000 : inst_name = "IRQ 0"; 4'b0001 : inst_name = "IRQ 1"; 4'b0010 : inst_name = "IRQ 2"; 4'b0011 : inst_name = "IRQ 3"; 4'b0100 : inst_name = "IRQ 4"; 4'b0101 : inst_name = "IRQ 5"; 4'b0110 : inst_name = "IRQ 6"; 4'b0111 : inst_name = "IRQ 7"; 4'b1000 : inst_name = "IRQ 8"; 4'b1001 : inst_name = "IRQ 9"; 4'b1010 : inst_name = "IRQ 10"; 4'b1011 : inst_name = "IRQ 11"; 4'b1100 : inst_name = "IRQ 12"; 4'b1101 : inst_name = "IRQ 13"; 4'b1110 : inst_name = "NMI"; default : inst_name = "RESET"; endcase else if (inst_type=="SIG-OP") case(opcode[15:7]) 9'b000100_000 : inst_name = "RRC"; 9'b000100_001 : inst_name = "SWPB"; 9'b000100_010 : inst_name = "RRA"; 9'b000100_011 : inst_name = "SXT"; 9'b000100_100 : inst_name = "PUSH"; 9'b000100_101 : inst_name = "CALL"; 9'b000100_110 : inst_name = "RETI"; default : inst_name = "xxxx"; endcase else if (inst_type=="JUMP") case(opcode[15:10]) 6'b001_000 : inst_name = "JNE"; 6'b001_001 : inst_name = "JEQ"; 6'b001_010 : inst_name = "JNC"; 6'b001_011 : inst_name = "JC"; 6'b001_100 : inst_name = "JN"; 6'b001_101 : inst_name = "JGE"; 6'b001_110 : inst_name = "JL"; 6'b001_111 : inst_name = "JMP"; default : inst_name = "xxxx"; endcase else if (inst_type=="TWO-OP") case(opcode[15:12]) 4'b0100 : inst_name = "MOV"; 4'b0101 : inst_name = "ADD"; 4'b0110 : inst_name = "ADDC"; 4'b0111 : inst_name = "SUBC"; 4'b1000 : inst_name = "SUB"; 4'b1001 : inst_name = "CMP"; 4'b1010 : inst_name = "DADD"; 4'b1011 : inst_name = "BIT"; 4'b1100 : inst_name = "BIC"; 4'b1101 : inst_name = "BIS"; 4'b1110 : inst_name = "XOR"; 4'b1111 : inst_name = "AND"; default : inst_name = "xxxx"; endcase // Instructions byte/word mode reg [8*32-1:0] inst_bw; always @(opcode or inst_type) if (inst_type=="IRQ") inst_bw = ""; else if (inst_type=="SIG-OP") inst_bw = opcode[6] ? ".B" : ""; else if (inst_type=="JUMP") inst_bw = ""; else if (inst_type=="TWO-OP") inst_bw = opcode[6] ? ".B" : ""; // Source register reg [8*32-1:0] inst_src; wire [3:0] src_reg = (inst_type=="SIG-OP") ? opcode[3:0] : opcode[11:8]; always @(src_reg or inst_type) if (inst_type=="IRQ") inst_src = ""; else if (inst_type=="JUMP") inst_src = ""; else if ((inst_type=="SIG-OP") || (inst_type=="TWO-OP")) case(src_reg) 4'b0000 : inst_src = "r0"; 4'b0001 : inst_src = "r1"; 4'b0010 : inst_src = "r2"; 4'b0011 : inst_src = "r3"; 4'b0100 : inst_src = "r4"; 4'b0101 : inst_src = "r5"; 4'b0110 : inst_src = "r6"; 4'b0111 : inst_src = "r7"; 4'b1000 : inst_src = "r8"; 4'b1001 : inst_src = "r9"; 4'b1010 : inst_src = "r10"; 4'b1011 : inst_src = "r11"; 4'b1100 : inst_src = "r12"; 4'b1101 : inst_src = "r13"; 4'b1110 : inst_src = "r14"; default : inst_src = "r15"; endcase // Destination register reg [8*32-1:0] inst_dst; always @(opcode or inst_type) if (inst_type=="IRQ") inst_dst = ""; else if (inst_type=="SIG-OP") inst_dst = ""; else if (inst_type=="JUMP") inst_dst = ""; else if (inst_type=="TWO-OP") case(opcode[3:0]) 4'b0000 : inst_dst = "r0"; 4'b0001 : inst_dst = "r1"; 4'b0010 : inst_dst = "r2"; 4'b0011 : inst_dst = "r3"; 4'b0100 : inst_dst = "r4"; 4'b0101 : inst_dst = "r5"; 4'b0110 : inst_dst = "r6"; 4'b0111 : inst_dst = "r7"; 4'b1000 : inst_dst = "r8"; 4'b1001 : inst_dst = "r9"; 4'b1010 : inst_dst = "r10"; 4'b1011 : inst_dst = "r11"; 4'b1100 : inst_dst = "r12"; 4'b1101 : inst_dst = "r13"; 4'b1110 : inst_dst = "r14"; default : inst_dst = "r15"; endcase // Source Addressing mode reg [8*32-1:0] inst_as; always @(inst_type or src_reg or opcode or inst_src) begin if (inst_type=="IRQ") inst_as = ""; else if (inst_type=="JUMP") inst_as = ""; else if (src_reg==4'h3) // Addressing mode using R3 case (opcode[5:4]) 2'b11 : inst_as = "#-1"; 2'b10 : inst_as = "#2"; 2'b01 : inst_as = "#1"; default: inst_as = "#0"; endcase else if (src_reg==4'h2) // Addressing mode using R2 case (opcode[5:4]) 2'b11 : inst_as = "#8"; 2'b10 : inst_as = "#4"; 2'b01 : inst_as = "&EDE"; default: inst_as = inst_src; endcase else if (src_reg==4'h0) // Addressing mode using R0 case (opcode[5:4]) 2'b11 : inst_as = "#N"; 2'b10 : inst_as = myFormat("@", inst_src, 0); 2'b01 : inst_as = "EDE"; default: inst_as = inst_src; endcase else // General Addressing mode case (opcode[5:4]) 2'b11 : begin inst_as = myFormat("@", inst_src, 0); inst_as = myFormat(inst_as, "+", 0); end 2'b10 : inst_as = myFormat("@", inst_src, 0); 2'b01 : begin inst_as = myFormat("x(", inst_src, 0); inst_as = myFormat(inst_as, ")", 0); end default: inst_as = inst_src; endcase end // Destination Addressing mode reg [8*32-1:0] inst_ad; always @(opcode or inst_type or inst_dst) begin if (inst_type!="TWO-OP") inst_ad = ""; else if (opcode[3:0]==4'h2) // Addressing mode using R2 case (opcode[7]) 1'b1 : inst_ad = "&EDE"; default: inst_ad = inst_dst; endcase else if (opcode[3:0]==4'h0) // Addressing mode using R0 case (opcode[7]) 2'b1 : inst_ad = "EDE"; default: inst_ad = inst_dst; endcase else // General Addressing mode case (opcode[7]) 2'b1 : begin inst_ad = myFormat("x(", inst_dst, 0); inst_ad = myFormat(inst_ad, ")", 0); end default: inst_ad = inst_dst; endcase end // Currently executed instruction //================================ wire [8*32-1:0] inst_short = inst_name; reg [8*32-1:0] inst_full; always @(inst_type or inst_name or inst_bw or inst_as or inst_ad) begin inst_full = myFormat(inst_name, inst_bw, 0); inst_full = myFormat(inst_full, inst_as, 1); if (inst_type=="TWO-OP") inst_full = myFormat(inst_full, ",", 0); inst_full = myFormat(inst_full, inst_ad, 1); if (opcode==16'h4303) inst_full = "NOP"; if (opcode==`DBG_SWBRK_OP) inst_full = "SBREAK"; end // Instruction program counter //================================ reg [15:0] inst_pc; always @(posedge mclk or posedge puc_rst) if (puc_rst) inst_pc <= 16'h0000; else if (decode) inst_pc <= pc; endmodule // msp_debug
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