test.sv

This is OVM 2.0 source code .Very useful for developing system verilog Env

// $Id: test.sv,v 1.8 2008/09/02 09:53:45 jlrose Exp $
//----------------------------------------------------------------------
//   Copyright 2007-2008 Mentor Graphics Corporation
//   Copyright 2007-2008 Cadence Design Systems, Inc.
//   All Rights Reserved Worldwide
//
//   Licensed under the Apache License, Version 2.0 (the
//   "License"); you may not use this file except in
//   compliance with the License.  You may obtain a copy of
//   the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in
//   writing, software distributed under the License is
//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
//   CONDITIONS OF ANY KIND, either express or implied.  See
//   the License for the specific language governing
//   permissions and limitations under the License.
//----------------------------------------------------------------------



/*
About: phases/run_test

This test case will make testing for a hierarchy contains mix of ovm_components, ovm_components.

ovm_env calls global_stop_request

the main idea is to create a topology of components which had no run phase, and threads which had a run phase, and through the run phase of the top ovm_env ensure phasing is correct.

at the top module level the env will use the run_test mode.




To get detailed information about the ovm_components, ovm_components, ovm_phases and ovm_env.You may check the following files:
	- ovm/src/base/ovm_phases.sv
	- ovm/src/base/ovm_component.sv
	- ovm/src/base/ovm_component.svh
	- ovm/src/methodology/ovm_test.svh
*/


module test;
  import ovm_pkg::*;

  //Create a topology
  //            top
  //       |            |
  //     u1(A)         u2(A)
  //    |     |      |        |
  //   b1(B) d1(D)  b1(B)    d1(D)

  //No run phase
  class D extends ovm_component;
    function new (string name, ovm_component parent);
      super.new(name,parent);
    endfunction
    function void build();
      $display("%0t: %0s:  build", $time, get_full_name());
    endfunction
    function void end_of_elaboration();
      $display("%0t: %0s:  end_of_elaboration", $time, get_full_name());
    endfunction
    function void start_of_simulation();
      $display("%0t: %0s:  start_of_simulation", $time, get_full_name());
    endfunction
    function void extract();
      $display("%0t: %0s:  extract", $time, get_full_name());
    endfunction
    function void check();
      $display("%0t: %0s:  check", $time, get_full_name());
    endfunction
    function void report();
      $display("%0t: %0s:  report", $time, get_full_name());
    endfunction
  endclass

  //Has run phase
  class B extends ovm_component;
    rand logic [7:0] delay;
    function new (string name, ovm_component parent);
      super.new(name,parent);
    endfunction
    function void build();
      $display("%0t: %0s:  build", $time, get_full_name());
    endfunction
    function void end_of_elaboration();
      $display("%0t: %0s:  end_of_elaboration", $time, get_full_name());
    endfunction
    function void start_of_simulation();
      $display("%0t: %0s:  start_of_simulation", $time, get_full_name());
    endfunction
    function void extract();
      $display("%0t: %0s:  extract", $time, get_full_name());
    endfunction
    function void check();
      $display("%0t: %0s:  check", $time, get_full_name());
    endfunction
    function void report();
      $display("%0t: %0s:  report", $time, get_full_name());
    endfunction
    task run();
      $display("%0t: %0s:  start run phase", $time, get_full_name());
      #delay;
      $display("%0t: %0s:  end run phase", $time, get_full_name());
    endtask
  endclass
  
  //Has run phase and contains subcomponents
  class A extends ovm_component;
    rand B b1;
    rand D d1;
    rand logic [7:0] delay;
    function new (string name, ovm_component parent);
      super.new(name,parent);
      b1 = new("b1", this);
      d1 = new("d1", this);
    endfunction
    function void build();
      $display("%0t: %0s:  build", $time, get_full_name());
    endfunction
    function void end_of_elaboration();
      $display("%0t: %0s:  end_of_elaboration", $time, get_full_name());
    endfunction
    function void start_of_simulation();
      $display("%0t: %0s:  start_of_simulation", $time, get_full_name());
    endfunction
    function void extract();
      $display("%0t: %0s:  extract", $time, get_full_name());
    endfunction
    function void check();
      $display("%0t: %0s:  check", $time, get_full_name());
    endfunction
    function void report();
      $display("%0t: %0s:  report", $time, get_full_name());
    endfunction
    task run();
      $display("%0t: %0s:  start run phase", $time, get_full_name());
      #delay;
      $display("%0t: %0s:  end run phase", $time, get_full_name());
    endtask
  endclass

  //Top level contains two A components
  class top extends ovm_env;
    rand A a1;
    rand A a2;
    function new (string name, ovm_component parent);
      super.new(name,parent);
      a1 = new("a1", this);
      a2 = new("a2", this);
    endfunction
    function void build();
      $display("%0t: %0s:  build", $time, get_full_name());
    endfunction
    function void end_of_elaboration();
      $display("%0t: %0s:  end_of_elaboration", $time, get_full_name());
    endfunction
    function void start_of_simulation();
      $display("%0t: %0s:  start_of_simulation", $time, get_full_name());
    endfunction
    function void extract();
      $display("%0t: %0s:  extract", $time, get_full_name());
    endfunction
    function void check();
      $display("%0t: %0s:  check", $time, get_full_name());
    endfunction
    function void report();
      $display("%0t: %0s:  report", $time, get_full_name());
    endfunction
    task run();
      $display("%0t: %0s:  start run phase", $time, get_full_name());
      #500;
      $display("%0t: %0s:  end run phase", $time, get_full_name());
	
    endtask
  endclass


  top t = new("top", null);

  initial begin
    //Randomize all of the delays
    void'(t.randomize());

    run_test();
  end

  initial #1us global_stop_request();

endmodule