Subversion Repositories qaz_libs

//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2015 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                     ////
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//////////////////////////////////////////////////////////////////////


package bfm_pkg;

  // --------------------------------------------------------------------
  //
   typedef enum
   {
      NONE,
      REGULAR
      // BURSTY
   } traffic_type_e;

  // --------------------------------------------------------------------
  //
  class delay_class;

    rand int unsigned delay = 0;

    // --------------------------------------------------------------------
    //
    virtual function void set_delay(traffic_type_e kind = REGULAR);
      case(kind)
        NONE:     delay = 0;
        REGULAR:  assert(this.randomize() with{delay dist {0 := 60, [1:3] := 30, [4:7] := 10};});
        default:  delay = 0;
      endcase
    endfunction: set_delay

    // --------------------------------------------------------------------
    //
    virtual function int next(traffic_type_e kind = REGULAR);
      set_delay(kind);
      return(delay);
    endfunction: next

  // --------------------------------------------------------------------
  //
  endclass: delay_class

  // --------------------------------------------------------------------
  //
  virtual class transaction_class #(parameter type TR_T);

    delay_class delay_h;

    // --------------------------------------------------------------------
    //
    function void random;
      assert(this.randomize());
    endfunction: random

    //--------------------------------------------------------------------
    //
    function new;
      delay_h = new();
    endfunction: new

    // --------------------------------------------------------------------
    //
    pure virtual function void copy(TR_T from);

    // --------------------------------------------------------------------
    //
    function automatic TR_T clone;
      TR_T child;
      clone = new();
      $cast(child, this);
      clone.copy(child);
      return(clone);
    endfunction: clone

  // --------------------------------------------------------------------
  //
  endclass: transaction_class

//--------------------------------------------------------------------
//
endpackage: bfm_pkg