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[/] [pcie_sg_dma/] [branches/] [Virtex6/] [ML605_ISE12.3/] [ipcore_dir_ISE12.1/] [v6_pcie_v1_3/] [source/] [pcie_pipe_misc_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_pipe_misc_v6.v //-- //-- Description: Misc PIPE module for Virtex6 PCIe Block //-- //-- //-- //-------------------------------------------------------------------------------- `timescale 1ns/1ns module pcie_pipe_misc_v6 # ( parameter PIPE_PIPELINE_STAGES = 0 // 0 - 0 stages, 1 - 1 stage, 2 - 2 stages ) ( input wire pipe_tx_rcvr_det_i , input wire pipe_tx_reset_i , input wire pipe_tx_rate_i , input wire pipe_tx_deemph_i , input wire [2:0] pipe_tx_margin_i , input wire pipe_tx_swing_i , output wire pipe_tx_rcvr_det_o , output wire pipe_tx_reset_o , output wire pipe_tx_rate_o , output wire pipe_tx_deemph_o , output wire [2:0] pipe_tx_margin_o , output wire pipe_tx_swing_o , input wire pipe_clk , input wire rst_n ); //******************************************************************// // Reality check. // //******************************************************************// parameter TCQ = 1; // clock to out delay model reg pipe_tx_rcvr_det_q ; reg pipe_tx_reset_q ; reg pipe_tx_rate_q ; reg pipe_tx_deemph_q ; reg [2:0] pipe_tx_margin_q ; reg pipe_tx_swing_q ; reg pipe_tx_rcvr_det_qq ; reg pipe_tx_reset_qq ; reg pipe_tx_rate_qq ; reg pipe_tx_deemph_qq ; reg [2:0] pipe_tx_margin_qq ; reg pipe_tx_swing_qq ; generate if (PIPE_PIPELINE_STAGES == 0) begin assign pipe_tx_rcvr_det_o = pipe_tx_rcvr_det_i; assign pipe_tx_reset_o = pipe_tx_reset_i; assign pipe_tx_rate_o = pipe_tx_rate_i; assign pipe_tx_deemph_o = pipe_tx_deemph_i; assign pipe_tx_margin_o = pipe_tx_margin_i; assign pipe_tx_swing_o = pipe_tx_swing_i; end else if (PIPE_PIPELINE_STAGES == 1) begin always @(posedge pipe_clk) begin if (rst_n) begin pipe_tx_rcvr_det_q <= #TCQ 0; pipe_tx_reset_q <= #TCQ 1'b1; pipe_tx_rate_q <= #TCQ 0; pipe_tx_deemph_q <= #TCQ 1'b1; pipe_tx_margin_q <= #TCQ 0; pipe_tx_swing_q <= #TCQ 0; end else begin pipe_tx_rcvr_det_q <= #TCQ pipe_tx_rcvr_det_i; pipe_tx_reset_q <= #TCQ pipe_tx_reset_i; pipe_tx_rate_q <= #TCQ pipe_tx_rate_i; pipe_tx_deemph_q <= #TCQ pipe_tx_deemph_i; pipe_tx_margin_q <= #TCQ pipe_tx_margin_i; pipe_tx_swing_q <= #TCQ pipe_tx_swing_i; end end assign pipe_tx_rcvr_det_o = pipe_tx_rcvr_det_q; assign pipe_tx_reset_o = pipe_tx_reset_q; assign pipe_tx_rate_o = pipe_tx_rate_q; assign pipe_tx_deemph_o = pipe_tx_deemph_q; assign pipe_tx_margin_o = pipe_tx_margin_q; assign pipe_tx_swing_o = pipe_tx_swing_q; end else if (PIPE_PIPELINE_STAGES == 2) begin always @(posedge pipe_clk) begin if (rst_n) begin pipe_tx_rcvr_det_q <= #TCQ 0; pipe_tx_reset_q <= #TCQ 1'b1; pipe_tx_rate_q <= #TCQ 0; pipe_tx_deemph_q <= #TCQ 1'b1; pipe_tx_margin_q <= #TCQ 0; pipe_tx_swing_q <= #TCQ 0; pipe_tx_rcvr_det_qq <= #TCQ 0; pipe_tx_reset_qq <= #TCQ 1'b1; pipe_tx_rate_qq <= #TCQ 0; pipe_tx_deemph_qq <= #TCQ 1'b1; pipe_tx_margin_qq <= #TCQ 0; pipe_tx_swing_qq <= #TCQ 0; end else begin pipe_tx_rcvr_det_q <= #TCQ pipe_tx_rcvr_det_i; pipe_tx_reset_q <= #TCQ pipe_tx_reset_i; pipe_tx_rate_q <= #TCQ pipe_tx_rate_i; pipe_tx_deemph_q <= #TCQ pipe_tx_deemph_i; pipe_tx_margin_q <= #TCQ pipe_tx_margin_i; pipe_tx_swing_q <= #TCQ pipe_tx_swing_i; pipe_tx_rcvr_det_qq <= #TCQ pipe_tx_rcvr_det_q; pipe_tx_reset_qq <= #TCQ pipe_tx_reset_q; pipe_tx_rate_qq <= #TCQ pipe_tx_rate_q; pipe_tx_deemph_qq <= #TCQ pipe_tx_deemph_q; pipe_tx_margin_qq <= #TCQ pipe_tx_margin_q; pipe_tx_swing_qq <= #TCQ pipe_tx_swing_q; end end assign pipe_tx_rcvr_det_o = pipe_tx_rcvr_det_qq; assign pipe_tx_reset_o = pipe_tx_reset_qq; assign pipe_tx_rate_o = pipe_tx_rate_qq; assign pipe_tx_deemph_o = pipe_tx_deemph_qq; assign pipe_tx_margin_o = pipe_tx_margin_qq; assign pipe_tx_swing_o = pipe_tx_swing_qq; end endgenerate endmodule