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--- ../../../Bennu/Hardware/or1200v1/rtl/verilog/or1200_defines.v 2010-08-25 23:25:38.000000000 -0500 +++ ./or1200_defines.v 2010-08-26 21:31:42.000000000 -0500 @@ -971,7 +971,7 @@ // however already enough for use // with or32 gdb) // -//`define OR1200_DU_HWBKPTS +`define OR1200_DU_HWBKPTS // Number of DVR/DCR pairs if HW breakpoints enabled `define OR1200_DU_DVRDCR_PAIRS 8 @@ -1038,17 +1038,15 @@ `define OR1200_DU_DMR1_CW7 15:14 `define OR1200_DU_DMR1_CW8 17:16 `define OR1200_DU_DMR1_CW9 19:18 -`define OR1200_DU_DMR1_CW10 21:20 +`define OR1200_DU_DMR1_RES 21:20 `define OR1200_DU_DMR1_ST 22 `define OR1200_DU_DMR1_BT 23 -`define OR1200_DU_DMR1_DXFW 24 -`define OR1200_DU_DMR1_ETE 25 // DMR2 bits `define OR1200_DU_DMR2_WCE0 0 `define OR1200_DU_DMR2_WCE1 1 -`define OR1200_DU_DMR2_AWTC 12:2 -`define OR1200_DU_DMR2_WGB 23:13 +`define OR1200_DU_DMR2_AWTC 11:2 +`define OR1200_DU_DMR2_WGB 21:12 // DWCR bits `define OR1200_DU_DWCR_COUNT 15:0 --- /cygdrive/c/Projects/Bennu/Hardware/or1200v1/rtl/verilog/or1200_top.v 2010-08-25 23:25:40.000000000 -0500 +++ ./or1200_top.v 2010-06-12 16:59:02.000000000 -0500 @@ -43,6 +43,13 @@ // // CVS Revision History // +// $Log: or1200v1_hwbkpt.patch,v $ +// Revision 1.1 2010-08-27 02:43:07 Nathan +// Moved patches for third-party software to a separate, dedicated directory structure. +// +// Revision 1.13 2004/06/08 18:17:36 lampret +// Non-functional changes. Coding style fixes. +// // $Log: not supported by cvs2svn $ // Revision 1.12 2004/04/05 08:29:57 lampret // Merged branch_qmem into main tree. @@ -933,6 +936,7 @@ or1200_du or1200_du( .dcpu_cycstb_i(dcpu_cycstb_cpu), .dcpu_we_i(dcpu_we_cpu), .dcpu_adr_i(dcpu_adr_cpu), + .dcpu_be_i(dcpu_sel_cpu), .dcpu_dat_lsu(dcpu_dat_cpu), .dcpu_dat_dc(dcpu_dat_qmem), .icpu_cycstb_i(icpu_cycstb_cpu), --- /cygdrive/c/Projects/Bennu/Hardware/or1200v1/rtl/verilog/or1200_du.v 2010-08-25 23:25:38.000000000 -0500 +++ ./or1200_du.v 2010-08-26 21:28:32.000000000 -0500 @@ -124,8 +124,8 @@ module or1200_du( // RISC Internal Interface clk, rst, - dcpu_cycstb_i, dcpu_we_i, dcpu_adr_i, dcpu_dat_lsu, - dcpu_dat_dc, icpu_cycstb_i, + dcpu_cycstb_i, dcpu_we_i, dcpu_adr_i, dcpu_be_i, + dcpu_dat_lsu, dcpu_dat_dc, icpu_cycstb_i, ex_freeze, branch_op, ex_insn, id_pc, spr_dat_npc, rf_dataw, du_dsr, du_stall, du_addr, du_dat_i, du_dat_o, @@ -152,6 +152,7 @@ input rst; // Reset input dcpu_cycstb_i; // LSU status input dcpu_we_i; // LSU status input [31:0] dcpu_adr_i; // LSU addr +input [3:0] dcpu_be_i; input [31:0] dcpu_dat_lsu; // LSU store data input [31:0] dcpu_dat_dc; // LSU load data input [`OR1200_FETCHOP_WIDTH-1:0] icpu_cycstb_i; // IFETCH unit status @@ -192,6 +193,7 @@ input [dw-1:0] dbg_dat_i; // External Da output [dw-1:0] dbg_dat_o; // External Data Output output dbg_ack_o; // External Data Acknowledge (not WB compatible) +reg [9:0] wp; // // Some connections go directly from the CPU through DU to Debug I/F @@ -216,7 +218,7 @@ assign dbg_is_o = 2'b00; assign dbg_lss_o = dcpu_cycstb_i ? {dcpu_we_i, 3'b000} : 4'b0000; assign dbg_is_o = {1'b0, icpu_cycstb_i}; `endif -assign dbg_wp_o = 11'b000_0000_0000; +assign dbg_wp_o = {1'b0, wp}; //11'b000_0000_0000; assign dbg_dat_o = du_dat_i; // @@ -253,9 +255,9 @@ wire [24:0] dmr1; // DMR1 not impleme // Debug Mode Register 2 // `ifdef OR1200_DU_DMR2 -reg [23:0] dmr2; // DMR2 implemented +reg [21:0] dmr2; // DMR2 implemented `else -wire [23:0] dmr2; // DMR2 not implemented +wire [21:0] dmr2; // DMR2 not implemented `endif // @@ -473,6 +475,14 @@ reg [31:0] match_cond4_ct; reg [31:0] match_cond5_ct; reg [31:0] match_cond6_ct; reg [31:0] match_cond7_ct; +reg [31:0] match_cond0_tmp; +reg [31:0] match_cond1_tmp; +reg [31:0] match_cond2_tmp; +reg [31:0] match_cond3_tmp; +reg [31:0] match_cond4_tmp; +reg [31:0] match_cond5_tmp; +reg [31:0] match_cond6_tmp; +reg [31:0] match_cond7_tmp; reg match_cond0_stb; reg match_cond1_stb; reg match_cond2_stb; @@ -491,9 +501,16 @@ reg match6; reg match7; reg wpcntr0_match; reg wpcntr1_match; -reg incr_wpcntr0; -reg incr_wpcntr1; -reg [10:0] wp; +reg wpcntr0_armed; +reg wpcntr0_oneshot; +reg wpcntr1_armed; +reg wpcntr1_oneshot; +wire incr_wpcntr0; +reg incr_wpcntr0_latched; +wire incr_wpcntr1; +reg incr_wpcntr1_latched; +reg du_hwbkpt_latched; +reg [9:0] wp_latched; `endif wire du_hwbkpt; `ifdef OR1200_DU_READREGS @@ -670,11 +687,11 @@ assign dmr1 = 25'h000_0000; `ifdef OR1200_DU_DMR2 always @(posedge clk or posedge rst) if (rst) - dmr2 <= 24'h00_0000; + dmr2 <= 22'h00_0000; else if (dmr2_sel && spr_write) - dmr2 <= #1 spr_dat_i[23:0]; + dmr2 <= #1 spr_dat_i[21:0]; `else -assign dmr2 = 24'h00_0000; +assign dmr2 = 22'h00_0000; `endif // @@ -815,9 +832,9 @@ assign dvr7 = 32'h0000_0000; `ifdef OR1200_DU_DCR0 always @(posedge clk or posedge rst) if (rst) - dcr0 <= 8'h00; + dcr0 <= 8'h01; else if (dcr0_sel && spr_write) - dcr0 <= #1 spr_dat_i[7:0]; + dcr0 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr0 = 8'h00; `endif @@ -828,9 +845,9 @@ assign dcr0 = 8'h00; `ifdef OR1200_DU_DCR1 always @(posedge clk or posedge rst) if (rst) - dcr1 <= 8'h00; + dcr1 <= 8'h01; else if (dcr1_sel && spr_write) - dcr1 <= #1 spr_dat_i[7:0]; + dcr1 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr1 = 8'h00; `endif @@ -841,9 +858,9 @@ assign dcr1 = 8'h00; `ifdef OR1200_DU_DCR2 always @(posedge clk or posedge rst) if (rst) - dcr2 <= 8'h00; + dcr2 <= 8'h01; else if (dcr2_sel && spr_write) - dcr2 <= #1 spr_dat_i[7:0]; + dcr2 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr2 = 8'h00; `endif @@ -854,9 +871,9 @@ assign dcr2 = 8'h00; `ifdef OR1200_DU_DCR3 always @(posedge clk or posedge rst) if (rst) - dcr3 <= 8'h00; + dcr3 <= 8'h01; else if (dcr3_sel && spr_write) - dcr3 <= #1 spr_dat_i[7:0]; + dcr3 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr3 = 8'h00; `endif @@ -867,9 +884,9 @@ assign dcr3 = 8'h00; `ifdef OR1200_DU_DCR4 always @(posedge clk or posedge rst) if (rst) - dcr4 <= 8'h00; + dcr4 <= 8'h01; else if (dcr4_sel && spr_write) - dcr4 <= #1 spr_dat_i[7:0]; + dcr4 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr4 = 8'h00; `endif @@ -880,9 +897,9 @@ assign dcr4 = 8'h00; `ifdef OR1200_DU_DCR5 always @(posedge clk or posedge rst) if (rst) - dcr5 <= 8'h00; + dcr5 <= 8'h01; else if (dcr5_sel && spr_write) - dcr5 <= #1 spr_dat_i[7:0]; + dcr5 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr5 = 8'h00; `endif @@ -893,9 +910,9 @@ assign dcr5 = 8'h00; `ifdef OR1200_DU_DCR6 always @(posedge clk or posedge rst) if (rst) - dcr6 <= 8'h00; + dcr6 <= 8'h01; else if (dcr6_sel && spr_write) - dcr6 <= #1 spr_dat_i[7:0]; + dcr6 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr6 = 8'h00; `endif @@ -906,9 +923,9 @@ assign dcr6 = 8'h00; `ifdef OR1200_DU_DCR7 always @(posedge clk or posedge rst) if (rst) - dcr7 <= 8'h00; + dcr7 <= 8'h01; else if (dcr7_sel && spr_write) - dcr7 <= #1 spr_dat_i[7:0]; + dcr7 <= #1 {spr_dat_i[7:1], 1'b1}; `else assign dcr7 = 8'h00; `endif @@ -952,7 +969,7 @@ always @(spr_addr or dsr or drr or dmr1 or dvr5 or dvr6 or dvr7 or dcr0 or dcr1 or dcr2 or dcr3 or dcr4 or dcr5 or dcr6 or dcr7 - or dwcr0 or dwcr1 + or dwcr0 or dwcr1 or wp_latched `ifdef OR1200_DU_TB_IMPLEMENTED or tb_wadr or tbia_dat_o or tbim_dat_o or tbar_dat_o or tbts_dat_o @@ -1029,7 +1046,7 @@ always @(spr_addr or dsr or drr or dmr1 `endif `ifdef OR1200_DU_DMR2 `OR1200_DU_DMR2: - spr_dat_o = {8'h00, dmr2}; + spr_dat_o = {wp_latched, dmr2}; `endif `ifdef OR1200_DU_DWCR0 `OR1200_DU_DWCR0: @@ -1077,23 +1094,50 @@ assign du_dsr = dsr; always @(dcr0 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr0[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond0_ct = id_pc; // insn fetch EA - 3'b010: match_cond0_ct = dcpu_adr_i; // load EA - 3'b011: match_cond0_ct = dcpu_adr_i; // store EA - 3'b100: match_cond0_ct = dcpu_dat_dc; // load data - 3'b101: match_cond0_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond0_ct = dcpu_adr_i; // load/store EA - default:match_cond0_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond0_tmp = id_pc; // insn fetch EA + 3'b010: match_cond0_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond0_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond0_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond0_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond0_tmp = dcpu_adr_i; // load/store EA + default:match_cond0_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses (Match Condition 0) +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond0_tmp or dcr0 or dcpu_be_i) + case (dcr0[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond0_ct = { {24{dcr0[`OR1200_DU_DCR_SC] & match_cond0_tmp[31]}}, match_cond0_tmp[31:24]}; + 4'b0100: match_cond0_ct = { {24{dcr0[`OR1200_DU_DCR_SC] & match_cond0_tmp[23]}}, match_cond0_tmp[23:16]}; + 4'b0010: match_cond0_ct = { {24{dcr0[`OR1200_DU_DCR_SC] & match_cond0_tmp[15]}}, match_cond0_tmp[15:8]}; + 4'b0001: match_cond0_ct = { {24{dcr0[`OR1200_DU_DCR_SC] & match_cond0_tmp[7] }}, match_cond0_tmp[7:0]}; + 4'b1100: match_cond0_ct = { {16{dcr0[`OR1200_DU_DCR_SC] & match_cond0_tmp[31]}}, match_cond0_tmp[31:16]}; + 4'b0011: match_cond0_ct = { {16{dcr0[`OR1200_DU_DCR_SC] & match_cond0_tmp[15]}}, match_cond0_tmp[15:0]}; + default: match_cond0_ct = match_cond0_tmp; + endcase + end + default: match_cond0_ct = match_cond0_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 0) // -always @(dcr0 or dcpu_cycstb_i) - case (dcr0[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr0 or dcpu_cycstb_i or dcpu_we_i) + case (dcr0[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond0_stb = 1'b0; //comparison disabled 3'b001: match_cond0_stb = 1'b1; // insn fetch EA - default:match_cond0_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond0_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond0_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond0_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond0_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond0_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1105,33 +1149,32 @@ always @(match_cond0_stb or dcr0 or dvr0 4'b1_000, 4'b1_111: match0 = 1'b0; 4'b1_001: match0 = - ((match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]) == - (dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC])); + (match_cond0_ct == dvr0); 4'b1_010: match0 = - ((match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]) < - (dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC])); + ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} < + {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]} ); 4'b1_011: match0 = - ((match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]) <= - (dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC])); + ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} <= + {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]} ); 4'b1_100: match0 = - ((match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]) > - (dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC])); + ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} > + {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]} ); 4'b1_101: match0 = - ((match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]) >= - (dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC])); + ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} >= + {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]} ); 4'b1_110: match0 = - ((match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]) != - (dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC])); + (match_cond0_ct != dvr0); endcase + // // Watchpoint 0 // -always @(dmr1 or match0) +always @(dmr1 or match0 or dbg_ewt_i) case (dmr1[`OR1200_DU_DMR1_CW0]) 2'b00: wp[0] = match0; - 2'b01: wp[0] = match0; - 2'b10: wp[0] = match0; + 2'b01: wp[0] = match0 & dbg_ewt_i; + 2'b10: wp[0] = match0 | dbg_ewt_i; 2'b11: wp[0] = 1'b0; endcase @@ -1141,23 +1184,50 @@ always @(dmr1 or match0) always @(dcr1 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr1[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond1_ct = id_pc; // insn fetch EA - 3'b010: match_cond1_ct = dcpu_adr_i; // load EA - 3'b011: match_cond1_ct = dcpu_adr_i; // store EA - 3'b100: match_cond1_ct = dcpu_dat_dc; // load data - 3'b101: match_cond1_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond1_ct = dcpu_adr_i; // load/store EA - default:match_cond1_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond1_tmp = id_pc; // insn fetch EA + 3'b010: match_cond1_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond1_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond1_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond1_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond1_tmp = dcpu_adr_i; // load/store EA + default:match_cond1_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses (Match Condition 1) +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond1_tmp or dcr1 or dcpu_be_i) + case (dcr1[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond1_ct = { {24{dcr1[`OR1200_DU_DCR_SC] & match_cond1_tmp[31]}}, match_cond1_tmp[31:24]}; + 4'b0100: match_cond1_ct = { {24{dcr1[`OR1200_DU_DCR_SC] & match_cond1_tmp[23]}}, match_cond1_tmp[23:16]}; + 4'b0010: match_cond1_ct = { {24{dcr1[`OR1200_DU_DCR_SC] & match_cond1_tmp[15]}}, match_cond1_tmp[15:8]}; + 4'b0001: match_cond1_ct = { {24{dcr1[`OR1200_DU_DCR_SC] & match_cond1_tmp[7] }}, match_cond1_tmp[7:0]}; + 4'b1100: match_cond1_ct = { {16{dcr1[`OR1200_DU_DCR_SC] & match_cond1_tmp[31]}}, match_cond1_tmp[31:16]}; + 4'b0011: match_cond1_ct = { {16{dcr1[`OR1200_DU_DCR_SC] & match_cond1_tmp[15]}}, match_cond1_tmp[15:0]}; + default: match_cond1_ct = match_cond1_tmp; + endcase + end + default: match_cond1_ct = match_cond1_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 1) // -always @(dcr1 or dcpu_cycstb_i) - case (dcr1[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr1 or dcpu_cycstb_i or dcpu_we_i) + case (dcr1[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond1_stb = 1'b0; //comparison disabled 3'b001: match_cond1_stb = 1'b1; // insn fetch EA - default:match_cond1_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond1_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond1_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond1_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond1_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond1_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1169,23 +1239,21 @@ always @(match_cond1_stb or dcr1 or dvr1 4'b1_000, 4'b1_111: match1 = 1'b0; 4'b1_001: match1 = - ((match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]) == - (dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC])); + (match_cond1_ct == dvr1); 4'b1_010: match1 = - ((match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]) < - (dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC])); + ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} < + {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]} ); 4'b1_011: match1 = - ((match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]) <= - (dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC])); + ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} <= + {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]} ); 4'b1_100: match1 = - ((match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]) > - (dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC])); + ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} > + {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]} ); 4'b1_101: match1 = - ((match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]) >= - (dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC])); + ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} >= + {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]} ); 4'b1_110: match1 = - ((match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]) != - (dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC])); + (match_cond1_ct != dvr1); endcase // @@ -1199,29 +1267,57 @@ always @(dmr1 or match1 or wp) 2'b11: wp[1] = 1'b0; endcase + // // Compare To What (Match Condition 2) // always @(dcr2 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr2[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond2_ct = id_pc; // insn fetch EA - 3'b010: match_cond2_ct = dcpu_adr_i; // load EA - 3'b011: match_cond2_ct = dcpu_adr_i; // store EA - 3'b100: match_cond2_ct = dcpu_dat_dc; // load data - 3'b101: match_cond2_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond2_ct = dcpu_adr_i; // load/store EA - default:match_cond2_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond2_tmp = id_pc; // insn fetch EA + 3'b010: match_cond2_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond2_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond2_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond2_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond2_tmp = dcpu_adr_i; // load/store EA + default:match_cond2_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses (Match Condition 2) +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond2_tmp or dcr2 or dcpu_be_i) + case (dcr2[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond2_ct = { {24{dcr2[`OR1200_DU_DCR_SC] & match_cond2_tmp[31]}}, match_cond2_tmp[31:24]}; + 4'b0100: match_cond2_ct = { {24{dcr2[`OR1200_DU_DCR_SC] & match_cond2_tmp[23]}}, match_cond2_tmp[23:16]}; + 4'b0010: match_cond2_ct = { {24{dcr2[`OR1200_DU_DCR_SC] & match_cond2_tmp[15]}}, match_cond2_tmp[15:8]}; + 4'b0001: match_cond2_ct = { {24{dcr2[`OR1200_DU_DCR_SC] & match_cond2_tmp[7] }}, match_cond2_tmp[7:0]}; + 4'b1100: match_cond2_ct = { {16{dcr2[`OR1200_DU_DCR_SC] & match_cond2_tmp[31]}}, match_cond2_tmp[31:16]}; + 4'b0011: match_cond2_ct = { {16{dcr2[`OR1200_DU_DCR_SC] & match_cond2_tmp[15]}}, match_cond2_tmp[15:0]}; + default: match_cond2_ct = match_cond2_tmp; + endcase + end + default: match_cond2_ct = match_cond2_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 2) // -always @(dcr2 or dcpu_cycstb_i) - case (dcr2[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr2 or dcpu_cycstb_i or dcpu_we_i) + case (dcr2[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond2_stb = 1'b0; //comparison disabled 3'b001: match_cond2_stb = 1'b1; // insn fetch EA - default:match_cond2_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond2_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond2_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond2_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond2_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond2_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1233,23 +1329,21 @@ always @(match_cond2_stb or dcr2 or dvr2 4'b1_000, 4'b1_111: match2 = 1'b0; 4'b1_001: match2 = - ((match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]) == - (dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC])); + (match_cond2_ct == dvr2); 4'b1_010: match2 = - ((match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]) < - (dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC])); + ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} < + {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]} ); 4'b1_011: match2 = - ((match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]) <= - (dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC])); + ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} <= + {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]} ); 4'b1_100: match2 = - ((match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]) > - (dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC])); + ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} > + {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]} ); 4'b1_101: match2 = - ((match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]) >= - (dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC])); + ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} >= + {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]} ); 4'b1_110: match2 = - ((match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]) != - (dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC])); + (match_cond2_ct != dvr2); endcase // @@ -1263,29 +1357,57 @@ always @(dmr1 or match2 or wp) 2'b11: wp[2] = 1'b0; endcase + // // Compare To What (Match Condition 3) // always @(dcr3 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr3[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond3_ct = id_pc; // insn fetch EA - 3'b010: match_cond3_ct = dcpu_adr_i; // load EA - 3'b011: match_cond3_ct = dcpu_adr_i; // store EA - 3'b100: match_cond3_ct = dcpu_dat_dc; // load data - 3'b101: match_cond3_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond3_ct = dcpu_adr_i; // load/store EA - default:match_cond3_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond3_tmp = id_pc; // insn fetch EA + 3'b010: match_cond3_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond3_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond3_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond3_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond3_tmp = dcpu_adr_i; // load/store EA + default:match_cond3_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses (Match Condition 3) +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond3_tmp or dcr3 or dcpu_be_i) + case (dcr3[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond3_ct = { {24{dcr3[`OR1200_DU_DCR_SC] & match_cond3_tmp[31]}}, match_cond3_tmp[31:24]}; + 4'b0100: match_cond3_ct = { {24{dcr3[`OR1200_DU_DCR_SC] & match_cond3_tmp[23]}}, match_cond3_tmp[23:16]}; + 4'b0010: match_cond3_ct = { {24{dcr3[`OR1200_DU_DCR_SC] & match_cond3_tmp[15]}}, match_cond3_tmp[15:8]}; + 4'b0001: match_cond3_ct = { {24{dcr3[`OR1200_DU_DCR_SC] & match_cond3_tmp[7] }}, match_cond3_tmp[7:0]}; + 4'b1100: match_cond3_ct = { {16{dcr3[`OR1200_DU_DCR_SC] & match_cond3_tmp[31]}}, match_cond3_tmp[31:16]}; + 4'b0011: match_cond3_ct = { {16{dcr3[`OR1200_DU_DCR_SC] & match_cond3_tmp[15]}}, match_cond3_tmp[15:0]}; + default: match_cond3_ct = match_cond3_tmp; + endcase + end + default: match_cond3_ct = match_cond3_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 3) // -always @(dcr3 or dcpu_cycstb_i) - case (dcr3[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr3 or dcpu_cycstb_i or dcpu_we_i) + case (dcr3[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond3_stb = 1'b0; //comparison disabled 3'b001: match_cond3_stb = 1'b1; // insn fetch EA - default:match_cond3_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond3_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond3_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond3_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond3_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond3_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1297,23 +1419,21 @@ always @(match_cond3_stb or dcr3 or dvr3 4'b1_000, 4'b1_111: match3 = 1'b0; 4'b1_001: match3 = - ((match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]) == - (dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC])); + (match_cond3_ct == dvr3); 4'b1_010: match3 = - ((match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]) < - (dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC])); + ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} < + {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]} ); 4'b1_011: match3 = - ((match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]) <= - (dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC])); + ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} <= + {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]} ); 4'b1_100: match3 = - ((match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]) > - (dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC])); + ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} > + {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]} ); 4'b1_101: match3 = - ((match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]) >= - (dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC])); + ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} >= + {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]} ); 4'b1_110: match3 = - ((match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]) != - (dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC])); + (match_cond3_ct != dvr3); endcase // @@ -1327,29 +1447,57 @@ always @(dmr1 or match3 or wp) 2'b11: wp[3] = 1'b0; endcase + // // Compare To What (Match Condition 4) // always @(dcr4 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr4[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond4_ct = id_pc; // insn fetch EA - 3'b010: match_cond4_ct = dcpu_adr_i; // load EA - 3'b011: match_cond4_ct = dcpu_adr_i; // store EA - 3'b100: match_cond4_ct = dcpu_dat_dc; // load data - 3'b101: match_cond4_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond4_ct = dcpu_adr_i; // load/store EA - default:match_cond4_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond4_tmp = id_pc; // insn fetch EA + 3'b010: match_cond4_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond4_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond4_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond4_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond4_tmp = dcpu_adr_i; // load/store EA + default:match_cond4_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses (Match Condition 4) +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond4_tmp or dcr4 or dcpu_be_i) + case (dcr4[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond4_ct = { {24{dcr4[`OR1200_DU_DCR_SC] & match_cond4_tmp[31]}}, match_cond4_tmp[31:24]}; + 4'b0100: match_cond4_ct = { {24{dcr4[`OR1200_DU_DCR_SC] & match_cond4_tmp[23]}}, match_cond4_tmp[23:16]}; + 4'b0010: match_cond4_ct = { {24{dcr4[`OR1200_DU_DCR_SC] & match_cond4_tmp[15]}}, match_cond4_tmp[15:8]}; + 4'b0001: match_cond4_ct = { {24{dcr4[`OR1200_DU_DCR_SC] & match_cond4_tmp[7] }}, match_cond4_tmp[7:0]}; + 4'b1100: match_cond4_ct = { {16{dcr4[`OR1200_DU_DCR_SC] & match_cond4_tmp[31]}}, match_cond4_tmp[31:16]}; + 4'b0011: match_cond4_ct = { {16{dcr4[`OR1200_DU_DCR_SC] & match_cond4_tmp[15]}}, match_cond4_tmp[15:0]}; + default: match_cond4_ct = match_cond4_tmp; + endcase + end + default: match_cond4_ct = match_cond4_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 4) // -always @(dcr4 or dcpu_cycstb_i) - case (dcr4[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr4 or dcpu_cycstb_i or dcpu_we_i) + case (dcr4[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond4_stb = 1'b0; //comparison disabled 3'b001: match_cond4_stb = 1'b1; // insn fetch EA - default:match_cond4_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond4_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond4_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond4_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond4_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond4_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1361,23 +1509,21 @@ always @(match_cond4_stb or dcr4 or dvr4 4'b1_000, 4'b1_111: match4 = 1'b0; 4'b1_001: match4 = - ((match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]) == - (dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC])); + (match_cond4_ct == dvr4); 4'b1_010: match4 = - ((match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]) < - (dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC])); + ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} < + {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]} ); 4'b1_011: match4 = - ((match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]) <= - (dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC])); + ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} <= + {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]} ); 4'b1_100: match4 = - ((match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]) > - (dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC])); + ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} > + {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]} ); 4'b1_101: match4 = - ((match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]) >= - (dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC])); + ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} >= + {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]} ); 4'b1_110: match4 = - ((match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]) != - (dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC])); + (match_cond4_ct != dvr4); endcase // @@ -1391,29 +1537,57 @@ always @(dmr1 or match4 or wp) 2'b11: wp[4] = 1'b0; endcase + // // Compare To What (Match Condition 5) // always @(dcr5 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr5[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond5_ct = id_pc; // insn fetch EA - 3'b010: match_cond5_ct = dcpu_adr_i; // load EA - 3'b011: match_cond5_ct = dcpu_adr_i; // store EA - 3'b100: match_cond5_ct = dcpu_dat_dc; // load data - 3'b101: match_cond5_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond5_ct = dcpu_adr_i; // load/store EA - default:match_cond5_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond5_tmp = id_pc; // insn fetch EA + 3'b010: match_cond5_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond5_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond5_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond5_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond5_tmp = dcpu_adr_i; // load/store EA + default:match_cond5_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses (Match Condition 5) +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond5_tmp or dcr5 or dcpu_be_i) + case (dcr5[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond5_ct = { {24{dcr5[`OR1200_DU_DCR_SC] & match_cond5_tmp[31]}}, match_cond5_tmp[31:24]}; + 4'b0100: match_cond5_ct = { {24{dcr5[`OR1200_DU_DCR_SC] & match_cond5_tmp[23]}}, match_cond5_tmp[23:16]}; + 4'b0010: match_cond5_ct = { {24{dcr5[`OR1200_DU_DCR_SC] & match_cond5_tmp[15]}}, match_cond5_tmp[15:8]}; + 4'b0001: match_cond5_ct = { {24{dcr5[`OR1200_DU_DCR_SC] & match_cond5_tmp[7] }}, match_cond5_tmp[7:0]}; + 4'b1100: match_cond5_ct = { {16{dcr5[`OR1200_DU_DCR_SC] & match_cond5_tmp[31]}}, match_cond5_tmp[31:16]}; + 4'b0011: match_cond5_ct = { {16{dcr5[`OR1200_DU_DCR_SC] & match_cond5_tmp[15]}}, match_cond5_tmp[15:0]}; + default: match_cond5_ct = match_cond5_tmp; + endcase + end + default: match_cond5_ct = match_cond5_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 5) // -always @(dcr5 or dcpu_cycstb_i) - case (dcr5[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr5 or dcpu_cycstb_i or dcpu_we_i) + case (dcr5[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond5_stb = 1'b0; //comparison disabled 3'b001: match_cond5_stb = 1'b1; // insn fetch EA - default:match_cond5_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond5_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond5_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond5_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond5_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond5_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1425,23 +1599,21 @@ always @(match_cond5_stb or dcr5 or dvr5 4'b1_000, 4'b1_111: match5 = 1'b0; 4'b1_001: match5 = - ((match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]) == - (dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC])); + (match_cond5_ct == dvr5); 4'b1_010: match5 = - ((match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]) < - (dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC])); + ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} < + {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]} ); 4'b1_011: match5 = - ((match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]) <= - (dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC])); + ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} <= + {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]} ); 4'b1_100: match5 = - ((match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]) > - (dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC])); + ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} > + {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]} ); 4'b1_101: match5 = - ((match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]) >= - (dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC])); + ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} >= + {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]} ); 4'b1_110: match5 = - ((match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]) != - (dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC])); + (match_cond5_ct != dvr5); endcase // @@ -1455,29 +1627,57 @@ always @(dmr1 or match5 or wp) 2'b11: wp[5] = 1'b0; endcase + // // Compare To What (Match Condition 6) // always @(dcr6 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr6[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond6_ct = id_pc; // insn fetch EA - 3'b010: match_cond6_ct = dcpu_adr_i; // load EA - 3'b011: match_cond6_ct = dcpu_adr_i; // store EA - 3'b100: match_cond6_ct = dcpu_dat_dc; // load data - 3'b101: match_cond6_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond6_ct = dcpu_adr_i; // load/store EA - default:match_cond6_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond6_tmp = id_pc; // insn fetch EA + 3'b010: match_cond6_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond6_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond6_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond6_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond6_tmp = dcpu_adr_i; // load/store EA + default:match_cond6_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses: +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR +always @(match_cond6_tmp or dcr6 or dcpu_be_i) + case (dcr6[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond6_ct = { {24{dcr6[`OR1200_DU_DCR_SC] & match_cond6_tmp[31]}}, match_cond6_tmp[31:24]}; + 4'b0100: match_cond6_ct = { {24{dcr6[`OR1200_DU_DCR_SC] & match_cond6_tmp[23]}}, match_cond6_tmp[23:16]}; + 4'b0010: match_cond6_ct = { {24{dcr6[`OR1200_DU_DCR_SC] & match_cond6_tmp[15]}}, match_cond6_tmp[15:8]}; + 4'b0001: match_cond6_ct = { {24{dcr6[`OR1200_DU_DCR_SC] & match_cond6_tmp[7] }}, match_cond6_tmp[7:0]}; + 4'b1100: match_cond6_ct = { {16{dcr6[`OR1200_DU_DCR_SC] & match_cond6_tmp[31]}}, match_cond6_tmp[31:16]}; + 4'b0011: match_cond6_ct = { {16{dcr6[`OR1200_DU_DCR_SC] & match_cond6_tmp[15]}}, match_cond6_tmp[15:0]}; + default: match_cond6_ct = match_cond6_tmp; + endcase + end + default: match_cond6_ct = match_cond6_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 6) // -always @(dcr6 or dcpu_cycstb_i) - case (dcr6[`OR1200_DU_DCR_CT]) // synopsys parallel_case +always @(dcr6 or dcpu_cycstb_i or dcpu_we_i) + case (dcr6[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond6_stb = 1'b0; //comparison disabled 3'b001: match_cond6_stb = 1'b1; // insn fetch EA - default:match_cond6_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond6_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond6_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond6_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond6_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond6_stb = dcpu_cycstb_i; // any load/store endcase // @@ -1489,23 +1689,21 @@ always @(match_cond6_stb or dcr6 or dvr6 4'b1_000, 4'b1_111: match6 = 1'b0; 4'b1_001: match6 = - ((match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]) == - (dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC])); + (match_cond6_ct == dvr6); 4'b1_010: match6 = - ((match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]) < - (dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC])); + ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} < + {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]} ); 4'b1_011: match6 = - ((match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]) <= - (dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC])); + ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} <= + {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]} ); 4'b1_100: match6 = - ((match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]) > - (dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC])); + ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} > + {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]} ); 4'b1_101: match6 = - ((match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]) >= - (dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC])); + ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} >= + {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]} ); 4'b1_110: match6 = - ((match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]) != - (dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC])); + (match_cond6_ct != dvr6); endcase // @@ -1525,27 +1723,58 @@ always @(dmr1 or match6 or wp) always @(dcr7 or id_pc or dcpu_adr_i or dcpu_dat_dc or dcpu_dat_lsu or dcpu_we_i) case (dcr7[`OR1200_DU_DCR_CT]) // synopsys parallel_case - 3'b001: match_cond7_ct = id_pc; // insn fetch EA - 3'b010: match_cond7_ct = dcpu_adr_i; // load EA - 3'b011: match_cond7_ct = dcpu_adr_i; // store EA - 3'b100: match_cond7_ct = dcpu_dat_dc; // load data - 3'b101: match_cond7_ct = dcpu_dat_lsu; // store data - 3'b110: match_cond7_ct = dcpu_adr_i; // load/store EA - default:match_cond7_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; - endcase + 3'b001: match_cond7_tmp = id_pc; // insn fetch EA -- *** use spr_dat_npc?? *** + 3'b010: match_cond7_tmp = dcpu_adr_i; // load EA + 3'b011: match_cond7_tmp = dcpu_adr_i; // store EA + 3'b100: match_cond7_tmp = dcpu_dat_dc; // load data + 3'b101: match_cond7_tmp = dcpu_dat_lsu; // store data + 3'b110: match_cond7_tmp = dcpu_adr_i; // load/store EA + default:match_cond7_tmp = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc; + endcase + +// Transparently handle 8/16/32 bit bus accesses: +// For addresses, leave unchanged +// for 32-bit data, leave unchanged +// for 8- or 16-bit data, move the active byte lane(s) to the LSB position +// This will allow the value to be compared to the LSB(s) of the DVR. +// If we're doing a signed compare (DCR_SC is set), we sign-extend. If not, zero-pad. +// This means that for a signed comparison, the DVR must ALWAYS be a 32-bit signed +// number, even if only doing on 8-bit compare! +always @(match_cond7_tmp or dcr7 or dcpu_be_i) + case (dcr7[`OR1200_DU_DCR_CT]) // synopsys parallel_case + 3'b100, + 3'b101, + 3'b111: begin // We're comparing to data + case (dcpu_be_i) + 4'b1000: match_cond7_ct = { {24{dcr7[`OR1200_DU_DCR_SC] & match_cond7_tmp[31]}}, match_cond7_tmp[31:24]}; + 4'b0100: match_cond7_ct = { {24{dcr7[`OR1200_DU_DCR_SC] & match_cond7_tmp[23]}}, match_cond7_tmp[23:16]}; + 4'b0010: match_cond7_ct = { {24{dcr7[`OR1200_DU_DCR_SC] & match_cond7_tmp[15]}}, match_cond7_tmp[15:8]}; + 4'b0001: match_cond7_ct = { {24{dcr7[`OR1200_DU_DCR_SC] & match_cond7_tmp[7] }}, match_cond7_tmp[7:0]}; + 4'b1100: match_cond7_ct = { {16{dcr7[`OR1200_DU_DCR_SC] & match_cond7_tmp[31]}}, match_cond7_tmp[31:16]}; + 4'b0011: match_cond7_ct = { {16{dcr7[`OR1200_DU_DCR_SC] & match_cond7_tmp[15]}}, match_cond7_tmp[15:0]}; + default: match_cond7_ct = match_cond7_tmp; + endcase + end + default: match_cond7_ct = match_cond7_tmp; // We're comparing an address + endcase // // When To Compare (Match Condition 7) // -always @(dcr7 or dcpu_cycstb_i) +always @(dcr7 or dcpu_cycstb_i or dcpu_we_i) case (dcr7[`OR1200_DU_DCR_CT]) // synopsys parallel_case 3'b000: match_cond7_stb = 1'b0; //comparison disabled 3'b001: match_cond7_stb = 1'b1; // insn fetch EA - default:match_cond7_stb = dcpu_cycstb_i; // any load/store + 3'b010: match_cond7_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load addr + 3'b011: match_cond7_stb = (dcpu_cycstb_i & dcpu_we_i); // data store addr + 3'b100: match_cond7_stb = (dcpu_cycstb_i & (~dcpu_we_i)); // data load val + 3'b101: match_cond7_stb = (dcpu_cycstb_i & dcpu_we_i); // data store val + default: match_cond7_stb = dcpu_cycstb_i; // any load/store endcase // // Match Condition 7 +// To do a signed comparison, we invert the MSB then do an unsigned comparison. // always @(match_cond7_stb or dcr7 or dvr7 or match_cond7_ct) casex ({match_cond7_stb, dcr7[`OR1200_DU_DCR_CC]}) @@ -1553,23 +1782,21 @@ always @(match_cond7_stb or dcr7 or dvr7 4'b1_000, 4'b1_111: match7 = 1'b0; 4'b1_001: match7 = - ((match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]) == - (dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC])); + (match_cond7_ct == dvr7); 4'b1_010: match7 = - ((match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]) < - (dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC])); + ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} < + {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]} ); 4'b1_011: match7 = - ((match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]) <= - (dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC])); + ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} <= + {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]} ); 4'b1_100: match7 = - ((match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]) > - (dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC])); + ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} > + {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]} ); 4'b1_101: match7 = - ((match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]) >= - (dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC])); + ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} >= + {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]} ); 4'b1_110: match7 = - ((match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]) != - (dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC])); + (match_cond7_ct != dvr7); endcase // @@ -1586,11 +1813,19 @@ always @(dmr1 or match7 or wp) // // Increment Watchpoint Counter 0 // -always @(wp or dmr2) - if (dmr2[`OR1200_DU_DMR2_WCE0]) - incr_wpcntr0 = |(wp & ~dmr2[`OR1200_DU_DMR2_AWTC]); - else - incr_wpcntr0 = 1'b0; + +// A watchpoint may hold it's wp bit high for >1 clock while ex_freeze +// is high, but drop it when ex_freeze is low. So, increment on wp will over-increment, +// but AND'ing with ex_freeze will never increment. Solution: hold the wp when set, +// inc the counter only when ex_freeze is false. +always @ (posedge clk) +begin + if(rst) incr_wpcntr0_latched <= 1'b0; + else if(ex_freeze & (|(wp & ~dmr2[`OR1200_DU_DMR2_AWTC]))) incr_wpcntr0_latched <= 1'b1; + else if(~ex_freeze) incr_wpcntr0_latched <= 1'b0; +end + +assign incr_wpcntr0 = dmr2[`OR1200_DU_DMR2_WCE0] & (~ex_freeze & (incr_wpcntr0_latched | (|(wp & ~dmr2[`OR1200_DU_DMR2_AWTC])))); // // Match Condition Watchpoint Counter 0 @@ -1601,15 +1836,35 @@ always @(dwcr0) else wpcntr0_match = 1'b0; +// +// Breakpoint Triggering - Counter 1 +// While the standard watchpoint hardware won't give a match for more than one +// clock cycle, the counters will give a constant match. This will be registered, +// causing a second trap condition after a continue. To fix this, just pulse the +// break output high for 1 clock cycle, and don't do it again until the match +// condition has been negated for at least 1 clock cycle. The new break output +// is called wpcntrX_oneshot. +// +always @ (posedge clk) +begin + if(wpcntr0_match & wpcntr0_armed) wpcntr0_oneshot = 1'b1; + else wpcntr0_oneshot = 1'b0; +end + +always @(posedge clk) +begin + if(wpcntr0_match) wpcntr0_armed = 1'b0; + else wpcntr0_armed = 1'b1; +end // -// Watchpoint 8 +// Watchpoint 8 (Counter 0) // -always @(dmr1 or wpcntr0_match or wp) +always @(dmr1 or wpcntr0_oneshot or wp) case (dmr1[`OR1200_DU_DMR1_CW8]) - 2'b00: wp[8] = wpcntr0_match; - 2'b01: wp[8] = wpcntr0_match & wp[7]; - 2'b10: wp[8] = wpcntr0_match | wp[7]; + 2'b00: wp[8] = wpcntr0_oneshot; + 2'b01: wp[8] = wpcntr0_oneshot & wp[3]; + 2'b10: wp[8] = wpcntr0_oneshot | wp[3]; 2'b11: wp[8] = 1'b0; endcase @@ -1617,11 +1872,18 @@ always @(dmr1 or wpcntr0_match or wp) // // Increment Watchpoint Counter 1 // -always @(wp or dmr2) - if (dmr2[`OR1200_DU_DMR2_WCE1]) - incr_wpcntr1 = |(wp & dmr2[`OR1200_DU_DMR2_AWTC]); - else - incr_wpcntr1 = 1'b0; +// A watchpoint may hold it's wp bit high for >1 clock while ex_freeze +// is high, but drop it when ex_freeze is low. So, increment on wp will over-increment, +// but AND'ing with ex_freeze will never increment. Solution: hold the wp when set, +// inc the counter only when ex_freeze is false. +always @ (posedge clk) +begin + if(rst) incr_wpcntr1_latched <= 1'b0; + else if(ex_freeze & (|(wp & dmr2[`OR1200_DU_DMR2_AWTC]))) incr_wpcntr1_latched <= 1'b1; + else if(~ex_freeze) incr_wpcntr1_latched <= 1'b0; +end + +assign incr_wpcntr1 = dmr2[`OR1200_DU_DMR2_WCE1] & (~ex_freeze & (incr_wpcntr1_latched | (|(wp & dmr2[`OR1200_DU_DMR2_AWTC])))); // // Match Condition Watchpoint Counter 1 @@ -1633,36 +1895,70 @@ always @(dwcr1) wpcntr1_match = 1'b0; // -// Watchpoint 9 -// -always @(dmr1 or wpcntr1_match or wp) - case (dmr1[`OR1200_DU_DMR1_CW9]) - 2'b00: wp[9] = wpcntr1_match; - 2'b01: wp[9] = wpcntr1_match & wp[8]; - 2'b10: wp[9] = wpcntr1_match | wp[8]; - 2'b11: wp[9] = 1'b0; - endcase +// Breakpoint Triggering - Counter 1 +// While the standard watchpoint hardware won't give a match for more than one +// clock cycle, the counters will give a constant match. This will be registered, +// causing a second trap condition after a continue. To fix this, just pulse the +// break output high for 1 clock cycle, and don't do it again until the match +// condition has been negated for at least 1 clock cycle. The new break output +// is called wpcntrX_oneshot. +// +always @ (posedge clk) +begin + if(wpcntr1_match & wpcntr1_armed) wpcntr1_oneshot = 1'b1; + else wpcntr1_oneshot = 1'b0; +end + +always @(posedge clk) +begin + if(wpcntr1_match) wpcntr1_armed = 1'b0; + else wpcntr1_armed = 1'b1; +end // -// Watchpoint 10 +// Watchpoint 9 (Counter 1) // -always @(dmr1 or dbg_ewt_i or wp) - case (dmr1[`OR1200_DU_DMR1_CW10]) - 2'b00: wp[10] = dbg_ewt_i; - 2'b01: wp[10] = dbg_ewt_i & wp[9]; - 2'b10: wp[10] = dbg_ewt_i | wp[9]; - 2'b11: wp[10] = 1'b0; +always @(dmr1 or wpcntr1_oneshot or wp) + case (dmr1[`OR1200_DU_DMR1_CW9]) + 2'b00: wp[9] = wpcntr1_oneshot; + 2'b01: wp[9] = wpcntr1_oneshot & wp[7]; + 2'b10: wp[9] = wpcntr1_oneshot | wp[7]; + 2'b11: wp[9] = 1'b0; endcase `endif + // // Watchpoints can cause trap exception // `ifdef OR1200_DU_HWBKPTS -assign du_hwbkpt = |(wp & dmr2[`OR1200_DU_DMR2_WGB]); + +// We must hold the du_hwbkpt signal high until it's noticed by the execution unit, +// which means until the 'freeze' signal goes inactive. + +always @ (posedge clk) +begin + if(rst) du_hwbkpt_latched <= 1'b0; + else if(ex_freeze & (|(wp & dmr2[`OR1200_DU_DMR2_WGB]))) du_hwbkpt_latched <= 1'b1; + else if(~ex_freeze) du_hwbkpt_latched <= 1'b0; +end + +assign du_hwbkpt = du_hwbkpt_latched | (|(wp & dmr2[`OR1200_DU_DMR2_WGB])); + + `ifdef OR1200_DU_DMR2 +// Spec doesn't state what resets the WGB bits in DMR2. +// This implementation resets on any write to the DMR2. +always @ (posedge clk) +begin + if(rst | (dmr2_sel & spr_write)) wp_latched <= 10'h000; + else if((|(wp & dmr2[`OR1200_DU_DMR2_WGB]))/*du_hwbkpt*/ & !(|wp_latched)) wp_latched <= (wp & dmr2[`OR1200_DU_DMR2_WGB]); +end + `endif + `else assign du_hwbkpt = 1'b0; +assign wp_latched = 10'h000; `endif `ifdef OR1200_DU_TB_IMPLEMENTED