Subversion Repositories qaz_libs

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

////                                                              ////

//// Copyright (C) 2015 Authors and OPENCORES.ORG                 ////

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//// This source file may be used and distributed without         ////

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//// removed from the file and that any derivative work contains  ////

//// the original copyright notice and the associated disclaimer. ////

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//// 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   ////

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//// This source is distributed in the hope that it will be       ////

//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////

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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