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[/] [pcie_sg_dma/] [branches/] [Virtex6/] [ML605_ISE12.3/] [pcie_sg_dma/] [Virtex6/] [ML605/] [v6_pcie_v1_3/] [source/] [pcie_brams_v6.v] - Rev 11
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//----------------------------------------------------------------------------- // // (c) Copyright 2009 Xilinx, Inc. All rights reserved. // // This file contains confidential and proprietary information of Xilinx, Inc. // and is protected under U.S. and international copyright and other // intellectual property laws. // // DISCLAIMER // // This disclaimer is not a license and does not grant any rights to the // materials distributed herewith. Except as otherwise provided in a valid // license issued to you by Xilinx, and to the maximum extent permitted by // applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL // FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS, // IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF // MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; // and (2) Xilinx shall not be liable (whether in contract or tort, including // negligence, or under any other theory of liability) for any loss or damage // of any kind or nature related to, arising under or in connection with these // materials, including for any direct, or any indirect, special, incidental, // or consequential loss or damage (including loss of data, profits, goodwill, // or any type of loss or damage suffered as a result of any action brought by // a third party) even if such damage or loss was reasonably foreseeable or // Xilinx had been advised of the possibility of the same. // // CRITICAL APPLICATIONS // // Xilinx products are not designed or intended to be fail-safe, or for use in // any application requiring fail-safe performance, such as life-support or // safety devices or systems, Class III medical devices, nuclear facilities, // applications related to the deployment of airbags, or any other // applications that could lead to death, personal injury, or severe property // or environmental damage (individually and collectively, "Critical // Applications"). Customer assumes the sole risk and liability of any use of // Xilinx products in Critical Applications, subject only to applicable laws // and regulations governing limitations on product liability. // // THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE // AT ALL TIMES. // //----------------------------------------------------------------------------- // Project : Virtex-6 Integrated Block for PCI Express // File : pcie_brams_v6.v //-- //-- Description: BlockRAM module for Virtex6 PCIe Block //-- //-- //-- //-------------------------------------------------------------------------------- `timescale 1ns/1ns module pcie_brams_v6 #( // the number of BRAMs to use // supported values are: // 1,2,4,8,18 parameter NUM_BRAMS = 0, // BRAM read address latency // // value meaning // ==================================================== // 0 BRAM read address port sample // 1 BRAM read address port sample and a pipeline stage on the address port parameter RAM_RADDR_LATENCY = 1, // BRAM read data latency // // value meaning // ==================================================== // 1 no BRAM OREG // 2 use BRAM OREG // 3 use BRAM OREG and a pipeline stage on the data port parameter RAM_RDATA_LATENCY = 1, // BRAM write latency // The BRAM write port is synchronous // // value meaning // ==================================================== // 0 BRAM write port sample // 1 BRAM write port sample plus pipeline stage parameter RAM_WRITE_LATENCY = 1 ) ( input user_clk_i, input reset_i, input wen, input [12:0] waddr, input [71:0] wdata, input ren, input rce, input [12:0] raddr, output [71:0] rdata ); // turn on the bram output register localparam DOB_REG = (RAM_RDATA_LATENCY > 1) ? 1 : 0; // calculate the data width of the individual brams localparam [6:0] WIDTH = ((NUM_BRAMS == 1) ? 72 : (NUM_BRAMS == 2) ? 36 : (NUM_BRAMS == 4) ? 18 : (NUM_BRAMS == 8) ? 9 : 4 ); parameter TCQ = 1; //synthesis translate_off initial begin $display("[%t] %m NUM_BRAMS %0d DOB_REG %0d WIDTH %0d RAM_WRITE_LATENCY %0d RAM_RADDR_LATENCY %0d RAM_RDATA_LATENCY %0d", $time, NUM_BRAMS, DOB_REG, WIDTH, RAM_WRITE_LATENCY, RAM_RADDR_LATENCY, RAM_RDATA_LATENCY); case (NUM_BRAMS) 1,2,4,8,18:; default: begin $display("[%t] %m Error NUM_BRAMS %0d not supported", $time, NUM_BRAMS); $finish; end endcase // case(NUM_BRAMS) case (RAM_RADDR_LATENCY) 0,1:; default: begin $display("[%t] %m Error RAM_READ_LATENCY %0d not supported", $time, RAM_RADDR_LATENCY); $finish; end endcase // case (RAM_RADDR_LATENCY) case (RAM_RDATA_LATENCY) 1,2,3:; default: begin $display("[%t] %m Error RAM_READ_LATENCY %0d not supported", $time, RAM_RDATA_LATENCY); $finish; end endcase // case (RAM_RDATA_LATENCY) case (RAM_WRITE_LATENCY) 0,1:; default: begin $display("[%t] %m Error RAM_WRITE_LATENCY %0d not supported", $time, RAM_WRITE_LATENCY); $finish; end endcase // case(RAM_WRITE_LATENCY) end //synthesis translate_on // model the delays for ram write latency wire wen_int; wire [12:0] waddr_int; wire [71:0] wdata_int; generate if (RAM_WRITE_LATENCY == 1) begin : wr_lat_2 reg wen_dly; reg [12:0] waddr_dly; reg [71:0] wdata_dly; always @(posedge user_clk_i) begin if (reset_i) begin wen_dly <= #TCQ 1'b0; waddr_dly <= #TCQ 13'b0; wdata_dly <= #TCQ 72'b0; end else begin wen_dly <= #TCQ wen; waddr_dly <= #TCQ waddr; wdata_dly <= #TCQ wdata; end end assign wen_int = wen_dly; assign waddr_int = waddr_dly; assign wdata_int = wdata_dly; end // if (RAM_WRITE_LATENCY == 1) else if (RAM_WRITE_LATENCY == 0) begin : wr_lat_1 assign wen_int = wen; assign waddr_int = waddr; assign wdata_int = wdata; end endgenerate // model the delays for ram read latency wire ren_int; wire [12:0] raddr_int; wire [71:0] rdata_int; generate if (RAM_RADDR_LATENCY == 1) begin : raddr_lat_2 reg ren_dly; reg [12:0] raddr_dly; always @(posedge user_clk_i) begin if (reset_i) begin ren_dly <= #TCQ 1'b0; raddr_dly <= #TCQ 13'b0; end else begin ren_dly <= #TCQ ren; raddr_dly <= #TCQ raddr; end // else: !if(reset_i) end assign ren_int = ren_dly; assign raddr_int = raddr_dly; end // block: rd_lat_addr_2 else begin : raddr_lat_1 assign ren_int = ren; assign raddr_int = raddr; end endgenerate generate if (RAM_RDATA_LATENCY == 3) begin : rdata_lat_3 reg [71:0] rdata_dly; always @(posedge user_clk_i) begin if (reset_i) begin rdata_dly <= #TCQ 72'b0; end else begin rdata_dly <= #TCQ rdata_int; end // else: !if(reset_i) end assign rdata = rdata_dly; end // block: rd_lat_data_3 else begin : rdata_lat_1_2 assign #TCQ rdata = rdata_int; end endgenerate // instantiate the brams generate genvar i; for (i = 0; i < NUM_BRAMS; i = i + 1) begin : brams pcie_bram_v6 #(.DOB_REG(DOB_REG), .WIDTH(WIDTH)) ram (.user_clk_i(user_clk_i), .reset_i(reset_i), .wen_i(wen_int), .waddr_i(waddr_int), .wdata_i(wdata_int[(((i + 1) * WIDTH) - 1): (i * WIDTH)]), .ren_i(ren_int), .raddr_i(raddr_int), .rdata_o(rdata_int[(((i + 1) * WIDTH) - 1): (i * WIDTH)]), .rce_i(rce)); end endgenerate endmodule // pcie_brams_v6