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[/] [openrisc/] [trunk/] [or1200/] [rtl/] [verilog/] [or1200_rfram_generic.v] - Rev 85
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////////////////////////////////////////////////////////////////////// //// //// //// OR1200's register file generic memory //// //// //// //// This file is part of the OpenRISC 1200 project //// //// http://www.opencores.org/cores/or1k/ //// //// //// //// Description //// //// Generic (flip-flop based) register file memory //// //// //// //// To Do: //// //// - nothing //// //// //// //// Author(s): //// //// - Damjan Lampret, lampret@opencores.org //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Authors and OPENCORES.ORG //// //// //// //// 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, download it //// //// from http://www.opencores.org/lgpl.shtml //// //// //// ////////////////////////////////////////////////////////////////////// // // CVS Revision History // $Log: not supported by cvs2svn $ // Revision 1.2 2002/09/03 22:28:21 lampret // As per Taylor Su suggestion all case blocks are full case by default and optionally (OR1200_CASE_DEFAULT) can be disabled to increase clock frequncy. // // Revision 1.1 2002/06/08 16:23:30 lampret // Generic flip-flop based memory macro for register file. // // // synopsys translate_off `include "timescale.v" // synopsys translate_on `include "or1200_defines.v" module or1200_rfram_generic( // Clock and reset clk, rst, // Port A ce_a, addr_a, do_a, // Port B ce_b, addr_b, do_b, // Port W ce_w, we_w, addr_w, di_w ); parameter dw = `OR1200_OPERAND_WIDTH; parameter aw = `OR1200_REGFILE_ADDR_WIDTH; // // I/O // // // Clock and reset // input clk; input rst; // // Port A // input ce_a; input [aw-1:0] addr_a; output [dw-1:0] do_a; // // Port B // input ce_b; input [aw-1:0] addr_b; output [dw-1:0] do_b; // // Port W // input ce_w; input we_w; input [aw-1:0] addr_w; input [dw-1:0] di_w; // // Internal wires and regs // reg [aw-1:0] intaddr_a; reg [aw-1:0] intaddr_b; reg [32*dw-1:0] mem; reg [dw-1:0] do_a; reg [dw-1:0] do_b; // // Write port // always @(posedge clk or posedge rst) if (rst) begin mem <= #1 {512'h0, 512'h0}; end else if (ce_w & we_w) case (addr_w) // synopsys parallel_case 5'd00: mem[32*0+31:32*0] <= #1 32'h0000_0000; 5'd01: mem[32*1+31:32*1] <= #1 di_w; 5'd02: mem[32*2+31:32*2] <= #1 di_w; 5'd03: mem[32*3+31:32*3] <= #1 di_w; 5'd04: mem[32*4+31:32*4] <= #1 di_w; 5'd05: mem[32*5+31:32*5] <= #1 di_w; 5'd06: mem[32*6+31:32*6] <= #1 di_w; 5'd07: mem[32*7+31:32*7] <= #1 di_w; 5'd08: mem[32*8+31:32*8] <= #1 di_w; 5'd09: mem[32*9+31:32*9] <= #1 di_w; 5'd10: mem[32*10+31:32*10] <= #1 di_w; 5'd11: mem[32*11+31:32*11] <= #1 di_w; 5'd12: mem[32*12+31:32*12] <= #1 di_w; 5'd13: mem[32*13+31:32*13] <= #1 di_w; 5'd14: mem[32*14+31:32*14] <= #1 di_w; 5'd15: mem[32*15+31:32*15] <= #1 di_w; 5'd16: mem[32*16+31:32*16] <= #1 di_w; 5'd17: mem[32*17+31:32*17] <= #1 di_w; 5'd18: mem[32*18+31:32*18] <= #1 di_w; 5'd19: mem[32*19+31:32*19] <= #1 di_w; 5'd20: mem[32*20+31:32*20] <= #1 di_w; 5'd21: mem[32*21+31:32*21] <= #1 di_w; 5'd22: mem[32*22+31:32*22] <= #1 di_w; 5'd23: mem[32*23+31:32*23] <= #1 di_w; 5'd24: mem[32*24+31:32*24] <= #1 di_w; 5'd25: mem[32*25+31:32*25] <= #1 di_w; 5'd26: mem[32*26+31:32*26] <= #1 di_w; 5'd27: mem[32*27+31:32*27] <= #1 di_w; 5'd28: mem[32*28+31:32*28] <= #1 di_w; 5'd29: mem[32*29+31:32*29] <= #1 di_w; 5'd30: mem[32*30+31:32*30] <= #1 di_w; default: mem[32*31+31:32*31] <= #1 di_w; endcase // // Read port A // always @(posedge clk or posedge rst) if (rst) begin intaddr_a <= #1 5'h00; end else if (ce_a) intaddr_a <= #1 addr_a; always @(mem or intaddr_a) case (intaddr_a) // synopsys parallel_case 5'd00: do_a = 32'h0000_0000; 5'd01: do_a = mem[32*1+31:32*1]; 5'd02: do_a = mem[32*2+31:32*2]; 5'd03: do_a = mem[32*3+31:32*3]; 5'd04: do_a = mem[32*4+31:32*4]; 5'd05: do_a = mem[32*5+31:32*5]; 5'd06: do_a = mem[32*6+31:32*6]; 5'd07: do_a = mem[32*7+31:32*7]; 5'd08: do_a = mem[32*8+31:32*8]; 5'd09: do_a = mem[32*9+31:32*9]; 5'd10: do_a = mem[32*10+31:32*10]; 5'd11: do_a = mem[32*11+31:32*11]; 5'd12: do_a = mem[32*12+31:32*12]; 5'd13: do_a = mem[32*13+31:32*13]; 5'd14: do_a = mem[32*14+31:32*14]; 5'd15: do_a = mem[32*15+31:32*15]; 5'd16: do_a = mem[32*16+31:32*16]; 5'd17: do_a = mem[32*17+31:32*17]; 5'd18: do_a = mem[32*18+31:32*18]; 5'd19: do_a = mem[32*19+31:32*19]; 5'd20: do_a = mem[32*20+31:32*20]; 5'd21: do_a = mem[32*21+31:32*21]; 5'd22: do_a = mem[32*22+31:32*22]; 5'd23: do_a = mem[32*23+31:32*23]; 5'd24: do_a = mem[32*24+31:32*24]; 5'd25: do_a = mem[32*25+31:32*25]; 5'd26: do_a = mem[32*26+31:32*26]; 5'd27: do_a = mem[32*27+31:32*27]; 5'd28: do_a = mem[32*28+31:32*28]; 5'd29: do_a = mem[32*29+31:32*29]; 5'd30: do_a = mem[32*30+31:32*30]; default: do_a = mem[32*31+31:32*31]; endcase // // Read port B // always @(posedge clk or posedge rst) if (rst) begin intaddr_b <= #1 5'h00; end else if (ce_b) intaddr_b <= #1 addr_b; always @(mem or intaddr_b) case (intaddr_b) // synopsys parallel_case 5'd00: do_b = 32'h0000_0000; 5'd01: do_b = mem[32*1+31:32*1]; 5'd02: do_b = mem[32*2+31:32*2]; 5'd03: do_b = mem[32*3+31:32*3]; 5'd04: do_b = mem[32*4+31:32*4]; 5'd05: do_b = mem[32*5+31:32*5]; 5'd06: do_b = mem[32*6+31:32*6]; 5'd07: do_b = mem[32*7+31:32*7]; 5'd08: do_b = mem[32*8+31:32*8]; 5'd09: do_b = mem[32*9+31:32*9]; 5'd10: do_b = mem[32*10+31:32*10]; 5'd11: do_b = mem[32*11+31:32*11]; 5'd12: do_b = mem[32*12+31:32*12]; 5'd13: do_b = mem[32*13+31:32*13]; 5'd14: do_b = mem[32*14+31:32*14]; 5'd15: do_b = mem[32*15+31:32*15]; 5'd16: do_b = mem[32*16+31:32*16]; 5'd17: do_b = mem[32*17+31:32*17]; 5'd18: do_b = mem[32*18+31:32*18]; 5'd19: do_b = mem[32*19+31:32*19]; 5'd20: do_b = mem[32*20+31:32*20]; 5'd21: do_b = mem[32*21+31:32*21]; 5'd22: do_b = mem[32*22+31:32*22]; 5'd23: do_b = mem[32*23+31:32*23]; 5'd24: do_b = mem[32*24+31:32*24]; 5'd25: do_b = mem[32*25+31:32*25]; 5'd26: do_b = mem[32*26+31:32*26]; 5'd27: do_b = mem[32*27+31:32*27]; 5'd28: do_b = mem[32*28+31:32*28]; 5'd29: do_b = mem[32*29+31:32*29]; 5'd30: do_b = mem[32*30+31:32*30]; default: do_b = mem[32*31+31:32*31]; endcase endmodule
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