Subversion Repositories xge_mac

//////////////////////////////////////////////////////////////////////
////                                                              ////
////  File name "wishbone.v"                                      ////
////                                                              ////
////  This file is part of the "10GE MAC" project                 ////
////  http://www.opencores.org/cores/xge_mac/                     ////
////                                                              ////
////  Author(s):                                                  ////
////      - A. Tanguay (antanguay@opencores.org)                  ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2008 AUTHORS. All rights reserved.             ////
////                                                              ////
//// 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                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
 
 
`include "defines.v"
 
module stats_sm(/*AUTOARG*/
  // Outputs
  stats_tx_octets, stats_tx_pkts, stats_rx_octets, stats_rx_pkts,
  // Inputs
  wb_clk_i, wb_rst_i, txsfifo_rdata, txsfifo_rempty, rxsfifo_rdata,
  rxsfifo_rempty
  );
 
 
input         wb_clk_i;
input         wb_rst_i;
 
input  [13:0] txsfifo_rdata;
input         txsfifo_rempty;
 
input  [13:0] rxsfifo_rdata;
input         rxsfifo_rempty;
 
output [31:0] stats_tx_octets;
output [31:0] stats_tx_pkts;
 
output [31:0] stats_rx_octets;
output [31:0] stats_rx_pkts;
 
/*AUTOREG*/
// Beginning of automatic regs (for this module's undeclared outputs)
reg [31:0]              stats_rx_octets;
reg [31:0]              stats_rx_pkts;
reg [31:0]              stats_tx_octets;
reg [31:0]              stats_tx_pkts;
// End of automatics
 
 
/*AUTOWIRE*/
 
reg           txsfifo_rempty_d1;
reg           rxsfifo_rempty_d1;
 
reg [31:0]    next_stats_tx_octets;
reg [31:0]    next_stats_tx_pkts;
 
reg [31:0]    next_stats_rx_octets;
reg [31:0]    next_stats_rx_pkts;
 
always @(posedge wb_clk_i or posedge wb_rst_i) begin
 
    if (wb_rst_i == 1'b1) begin
 
        txsfifo_rempty_d1 <= 1'b1;
        rxsfifo_rempty_d1 <= 1'b1;
 
        stats_tx_octets <= 32'b0;
        stats_tx_pkts <= 32'b0;
 
        stats_rx_octets <= 32'b0;
        stats_rx_pkts <= 32'b0;
 
    end
    else begin
 
        txsfifo_rempty_d1 <= txsfifo_rempty;
        rxsfifo_rempty_d1 <= rxsfifo_rempty;
 
        stats_tx_octets <= next_stats_tx_octets;
        stats_tx_pkts <= next_stats_tx_pkts;
 
        stats_rx_octets <= next_stats_rx_octets;
        stats_rx_pkts <= next_stats_rx_pkts;
 
    end
 
end
 
always @(/*AS*/rxsfifo_rdata or rxsfifo_rempty_d1 or stats_rx_octets
         or stats_rx_pkts or stats_tx_octets or stats_tx_pkts
         or txsfifo_rdata or txsfifo_rempty_d1) begin
 
    next_stats_tx_octets = stats_tx_octets;
    next_stats_tx_pkts = stats_tx_pkts;
 
    next_stats_rx_octets = stats_rx_octets;
    next_stats_rx_pkts = stats_rx_pkts;
 
    if (!txsfifo_rempty_d1) begin
        next_stats_tx_octets = stats_tx_octets + {18'b0, txsfifo_rdata};
        next_stats_tx_pkts = stats_tx_pkts + 32'b1;
    end
 
    if (!rxsfifo_rempty_d1) begin
        next_stats_rx_octets = stats_rx_octets + {18'b0, rxsfifo_rdata};
        next_stats_rx_pkts = stats_rx_pkts + 32'b1;
    end
 
end
 
endmodule