Subversion Repositories ethmac10g

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// MODULE NAME: Destination Address Check                       ////

////                                                              ////

//// DESCRIPTION: Destination Address Checker of  10 Gigabit      ////

////              Ethernet MAC.                                   ////

////                                                              ////

//// This file is part of the 10 Gigabit Ethernet IP core project ////

////  http://www.opencores.org/projects/ethmac10g/                ////

////                                                              ////

//// AUTHOR(S):                                                   ////

//// Zheng Cao                                                    ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (c) 2005 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                     ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

//

// CVS REVISION HISTORY:

//

// $Log: not supported by cvs2svn $

// Revision 1.1.1.1  2006/05/31 05:59:41  Zheng Cao

// first version

//

// Revision 1.1  2005/12/25 16:43:10  Zheng Cao

// 

// 

//

//////////////////////////////////////////////////////////////////////

`include "timescale.v"

`include "xgiga_define.v"

module rxDAchecker(rxclk,reset,local_invalid, broad_valid, multi_valid, MAC_Addr, da_addr);

   input  rxclk;

   input  reset;

   output local_invalid;

   output broad_valid;

   output multi_valid;

   input [47:0] MAC_Addr;

   input [47:0] da_addr;

   parameter TP = 1;

   reg multi_valid;

   reg broad_valid;

   reg local_valid;

   always @(posedge rxclk or posedge reset) begin

         if (reset) begin

           multi_valid <=#TP 0;

           broad_valid <=#TP 0;

           local_valid <=#TP 0;

         end

         else begin

           multi_valid <=#TP (da_addr==`MULTICAST);

           broad_valid <=#TP (da_addr==`BROADCAST);

           local_valid <=#TP (da_addr==MAC_Addr);

         end

  end

  assign local_invalid = 1'b0;//~local_valid & ~multi_valid & ~broad_valid;

endmodule