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[/] [pci/] [tags/] [rel_1/] [rtl/] [verilog/] [wb_tpram.v] - Rev 18
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////////////////////////////////////////////////////////////////////// //// //// //// Generic Two-Port Synchronous RAM //// //// //// //// This file is part of pci bridge project //// //// http://www.opencores.org/cvsweb.shtml/pci/ //// //// //// //// Description //// //// This block is a wrapper with common two-port //// //// synchronous memory interface for different //// //// types of ASIC and FPGA RAMs. Beside universal memory //// //// interface it also provides behavioral model of generic //// //// two-port synchronous RAM. //// //// It should be used in all OPENCORES designs that want to be //// //// portable accross different target technologies and //// //// independent of target memory. //// //// //// //// Supported ASIC RAMs are: //// //// - Artisan Double-Port Sync RAM //// //// - Avant! Two-Port Sync RAM (*) //// //// - Virage 2-port Sync RAM //// //// //// //// Supported FPGA RAMs are: //// //// - Xilinx Virtex RAMB4_S16_S16 //// //// //// //// To Do: //// //// - fix Avant! //// //// - xilinx rams need external tri-state logic //// //// - add additional RAMs (Altera, VS etc) //// //// //// //// Author(s): //// //// - Damjan Lampret, lampret@opencores.org //// //// - Miha Dolenc, mihad@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 $ // // synopsys translate_off `include "timescale.v" // synopsys translate_on `include "pci_constants.v" module WB_TPRAM ( // Generic synchronous two-port RAM interface clk_a, rst_a, ce_a, we_a, oe_a, addr_a, di_a, do_a, clk_b, rst_b, ce_b, we_b, oe_b, addr_b, di_b, do_b ); // // Default address and data buses width // parameter aw = 8; parameter dw = 40; // // Generic synchronous two-port RAM interface // input clk_a; // Clock input rst_a; // Reset input ce_a; // Chip enable input input we_a; // Write enable input input oe_a; // Output enable input input [aw-1:0] addr_a; // address bus inputs input [dw-1:0] di_a; // input data bus output [dw-1:0] do_a; // output data bus input clk_b; // Clock input rst_b; // Reset input ce_b; // Chip enable input input we_b; // Write enable input input oe_b; // Output enable input input [aw-1:0] addr_b; // address bus inputs input [dw-1:0] di_b; // input data bus output [dw-1:0] do_b; // output data bus // // Internal wires and registers // `ifdef WB_ARTISAN_SDP `define RAM_SELECTED // // Instantiation of ASIC memory: // // Artisan Synchronous Double-Port RAM (ra2sh) // art_hsdp_256x40 /*#(dw, 1<<aw, aw) */ artisan_sdp ( .qa(do_a), .clka(clk_a), .cena(~ce_a), .wena(~we_a), .aa(addr_a), .da(di_a), .oena(~oe_a), .qb(do_b), .clkb(clk_b), .cenb(~ce_b), .wenb(~we_b), .ab(addr_b), .db(di_b), .oenb(~oe_b) ); `endif `ifdef AVANT_ATP `define RAM_SELECTED // // Instantiation of ASIC memory: // // Avant! Asynchronous Two-Port RAM // avant_atp avant_atp( .web(~we), .reb(), .oeb(~oe), .rcsb(), .wcsb(), .ra(addr), .wa(addr), .di(di), .do(do) ); `endif `ifdef VIRAGE_STP `define RAM_SELECTED // // Instantiation of ASIC memory: // // Virage Synchronous 2-port R/W RAM // virage_stp virage_stp( .QA(do_a), .QB(do_b), .ADRA(addr_a), .DA(di_a), .WEA(we_a), .OEA(oe_a), .MEA(ce_a), .CLKA(clk_a), .ADRB(adr_b), .DB(di_b), .WEB(we_b), .OEB(oe_b), .MEB(ce_b), .CLKB(clk_b) ); `endif `ifdef WB_XILINX_RAMB4 `define RAM_SELECTED // // Instantiation of FPGA memory: // // Virtex/Spartan2 // // // Block 0 // RAMB4_S16_S16 ramb4_s16_s16_0( .CLKA(clk_a), .RSTA(rst_a), .ADDRA(addr_a), .DIA(di_a[15:0]), .ENA(ce_a), .WEA(we_a), .DOA(do_a[15:0]), .CLKB(clk_b), .RSTB(rst_b), .ADDRB(addr_b), .DIB(di_b[15:0]), .ENB(ce_b), .WEB(we_b), .DOB(do_b[15:0]) ); // // Block 1 // RAMB4_S16_S16 ramb4_s16_s16_1( .CLKA(clk_a), .RSTA(rst_a), .ADDRA(addr_a), .DIA(di_a[31:16]), .ENA(ce_a), .WEA(we_a), .DOA(do_a[31:16]), .CLKB(clk_b), .RSTB(rst_b), .ADDRB(addr_b), .DIB(di_b[31:16]), .ENB(ce_b), .WEB(we_b), .DOB(do_b[31:16]) ); // // Block 2 // // block ram2 wires - non generic width of block rams wire [15:0] blk2_di_a = {8'h00, di_a[39:32]} ; wire [15:0] blk2_di_b = {8'h00, di_b[39:32]} ; wire [15:0] blk2_do_a ; wire [15:0] blk2_do_b ; assign do_a[39:32] = blk2_do_a[7:0] ; assign do_b[39:32] = blk2_do_b[7:0] ; RAMB4_S16_S16 ramb4_s16_s16_2( .CLKA(clk_a), .RSTA(rst_a), .ADDRA(addr_a), .DIA(blk2_di_a), .ENA(ce_a), .WEA(we_a), .DOA(blk2_do_a), .CLKB(clk_b), .RSTB(rst_b), .ADDRB(addr_b), .DIB(blk2_di_b), .ENB(ce_b), .WEB(we_b), .DOB(blk2_do_b) ); `endif `ifdef WB_XILINX_DIST_RAM `define RAM_SELECTED reg [(aw-1):0] out_address ; always@(posedge clk_b or posedge rst_b) begin if ( rst_b ) out_address <= #1 0 ; else if (ce_b) out_address <= #1 addr_b ; end WB_DIST_RAM #(aw) wb_distributed_ram ( .data_out (do_b), .we (we_a), .data_in (di_a), .read_address (out_address), .write_address (addr_a), .wclk (clk_a) ); `endif `ifdef RAM_SELECTED `undef RAM_SELECTED `else // // Generic two-port synchronous RAM model // // // Generic RAM's registers and wires // reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content reg [dw-1:0] do_reg_a; // RAM data output register reg [dw-1:0] do_reg_b; // RAM data output register // // Data output drivers // assign do_a = (oe_a) ? do_reg_a : {dw{1'bz}}; assign do_b = (oe_b) ? do_reg_b : {dw{1'bz}}; // // RAM read and write // always @(posedge clk_a) if (ce_a && !we_a) do_reg_a <= #1 mem[addr_a]; else if (ce_a && we_a) mem[addr_a] <= #1 di_a; // // RAM read and write // always @(posedge clk_b) if (ce_b && !we_b) do_reg_b <= #1 mem[addr_b]; else if (ce_b && we_b) mem[addr_b] <= #1 di_b; `endif // synopsys translate_off initial begin if (dw !== 40) begin $display("RAM instantiation error! Expected RAM width %d, actual %h!", 40, dw) ; $finish ; end `ifdef XILINX_RAMB4 if (aw !== 8) begin $display("RAM instantiation error! Expected RAM address width %d, actual %h!", 40, aw) ; $finish ; end `endif // currenlty only artisan ram of depth 256 is supported - they don't provide generic ram models `ifdef ARTISAN_SDP if (aw !== 8) begin $display("RAM instantiation error! Expected RAM address width %d, actual %h!", 40, aw) ; $finish ; end `endif end // synopsys translate_on endmodule `ifdef WB_XILINX_DIST_RAM module WB_DIST_RAM (data_out, we, data_in, read_address, write_address, wclk); parameter addr_width = 4 ; output [39:0] data_out; input we, wclk; input [39:0] data_in; input [addr_width - 1:0] write_address, read_address; wire [3:0] waddr = write_address ; wire [3:0] raddr = read_address ; RAM16X1D ram00 (.DPO(data_out[0]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[0]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram01 (.DPO(data_out[1]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[1]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram02 (.DPO(data_out[2]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[2]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram03 (.DPO(data_out[3]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[3]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram04 (.DPO(data_out[4]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[4]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram05 (.DPO(data_out[5]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[5]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram06 (.DPO(data_out[6]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[6]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram07 (.DPO(data_out[7]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[7]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram08 (.DPO(data_out[8]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[8]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram09 (.DPO(data_out[9]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[9]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram10 (.DPO(data_out[10]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[10]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram11 (.DPO(data_out[11]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[11]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram12 (.DPO(data_out[12]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[12]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram13 (.DPO(data_out[13]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[13]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram14 (.DPO(data_out[14]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[14]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram15 (.DPO(data_out[15]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[15]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram16 (.DPO(data_out[16]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[16]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram17 (.DPO(data_out[17]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[17]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram18 (.DPO(data_out[18]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[18]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram19 (.DPO(data_out[19]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[19]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram20 (.DPO(data_out[20]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[20]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram21 (.DPO(data_out[21]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[21]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram22 (.DPO(data_out[22]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[22]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram23 (.DPO(data_out[23]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[23]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram24 (.DPO(data_out[24]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[24]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram25 (.DPO(data_out[25]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[25]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram26 (.DPO(data_out[26]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[26]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram27 (.DPO(data_out[27]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[27]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram28 (.DPO(data_out[28]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[28]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram29 (.DPO(data_out[29]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[29]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram30 (.DPO(data_out[30]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[30]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram31 (.DPO(data_out[31]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[31]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram32 (.DPO(data_out[32]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[32]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram33 (.DPO(data_out[33]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[33]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram34 (.DPO(data_out[34]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[34]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram35 (.DPO(data_out[35]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[35]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram36 (.DPO(data_out[36]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[36]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram37 (.DPO(data_out[37]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[37]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram38 (.DPO(data_out[38]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[38]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); RAM16X1D ram39 (.DPO(data_out[39]), .SPO(), .A0(waddr[0]), .A1(waddr[1]), .A2(waddr[2]), .A3(waddr[3]), .D(data_in[39]), .DPRA0(raddr[0]), .DPRA1(raddr[1]), .DPRA2(raddr[2]), .DPRA3(raddr[3]), .WCLK(wclk), .WE(we)); endmodule `endif
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