// $Id: hierarchy.sv,v 1.6 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: ovm_exmples/mechanism/hierarchyThis test is supposed to test the hierarchical connection between ports of hierarchical threads using a tlm_fifo exports.Walk through the test:A thread *gen* will use an ovm_blocking_put_port to put a transaction.A *conv* thread will use an ovm_blocking_put_port to put a transaction,an  ovm_blocking_get_port to get a transactions, and an ovm_analysis_ port to a writte a transaction through it.Another thread *bfm* will use an  ovm_blocking_get_port to only get the transactions that has been sent by the other threads.A *listener* will extends the ovm_subscriber, to implement the analysis port write function.A *producer* component will use ovm_blocking_put_port and ovm_analysis_port and a tlm_fifo, to connect the *gen* and *conv* put, get and analysis ports through the fifo exports.A *consumer* component will use ovm_blocking_put export and connect it directly to a fifo export, also will connect the *bfm*  get port to the fifo exportAt *top* env, the *producer*, *consumer*, and the the *listener* will be connected*/// $Id: hierarchy.sv,v 1.6 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.//----------------------------------------------------------------------package user_pkg;import ovm_pkg::*;`include "ovm_templates.svh"//----------------------------------------------------------------------// class transaction//----------------------------------------------------------------------class transaction extends ovm_transaction;  rand int data;  rand int addr;  function void copy( input transaction t );    data = t.data;    addr = t.addr;  endfunction  function bit comp( input transaction a , input transaction b );    return ((a.data == b.data) && (a.addr == b.addr));  endfunction  function ovm_object clone();    transaction t; t = new();    t.copy(this);    return t;  endfunction  function string convert2string();    string s;    $sformat(s, "[ addr = %x, data = %x ]", addr, data);    return s;  endfunctionendclass//----------------------------------------------------------------------// component gen//----------------------------------------------------------------------class gen extends ovm_component;  ovm_blocking_put_port #(transaction) put_port;  function new(string name, ovm_component parent);    super.new(name, parent);    put_port = new("put_port", this);  endfunction  task run;    transaction t;    string msg;    for(int i=0; i < 20; i++) begin      t = new();      assert(t.randomize());      $sformat(msg, "sending  : %s", t.convert2string());      ovm_report_info("gen", msg);      put_port.put(t);    end  endtaskendclass//----------------------------------------------------------------------// component conv//----------------------------------------------------------------------class conv extends ovm_component;  ovm_blocking_put_port #(transaction) put_port;  ovm_blocking_get_port #(transaction) get_port;  function new(string name, ovm_component parent);    super.new(name, parent);    put_port = new("put_port", this);    get_port = new("get_port", this);  endfunction  task run;    transaction t;    forever begin      get_port.get(t);      put_port.put(t);    end  endtaskendclass//----------------------------------------------------------------------// component bfm//----------------------------------------------------------------------class bfm extends ovm_component;  ovm_blocking_get_port #(transaction) get_port;  function new(string name, ovm_component parent);    super.new(name, parent);    get_port = new("get_port", this);  endfunction  task run;    transaction t;    string msg;    forever begin      get_port.get(t);      $sformat(msg, "receiving: %s", t.convert2string());      ovm_report_info("bfm", msg);    end  endtaskendclass//----------------------------------------------------------------------// component producer//----------------------------------------------------------------------// begin codeblock producerclass producer extends ovm_component;  ovm_blocking_put_port #(transaction) put_port;  gen g;  conv c;  tlm_fifo #(transaction) f;  function new(string name, ovm_component parent);    super.new(name, parent);    put_port = new("put_port", this);    g = new("gen", this);    c = new("conv", this);    f = new("fifo", this);    g.put_port.connect(f.blocking_put_export);  // A    c.get_port.connect(f.blocking_get_export);  // B    c.put_port.connect(put_port); // C  endfunctionendclass// end codeblock producer//----------------------------------------------------------------------// component consumer//----------------------------------------------------------------------// begin codeblock consumerclass consumer extends ovm_component;  ovm_blocking_put_export #(transaction) put_export;  bfm b;  tlm_fifo #(transaction) f;  function new(string name, ovm_component parent);    super.new(name, parent);    put_export = new("put_export", this);    f = new("fifo", this);    b = new("bfm", this);    put_export.connect(f.blocking_put_export); // E    b.get_port.connect(f.blocking_get_export); // F  endfunctionendclass// end codeblock consumer//----------------------------------------------------------------------// component top//----------------------------------------------------------------------// begin codeblock topclass top extends ovm_component;  producer p;  consumer c;  function new(string name, ovm_component parent);    super.new(name, parent);    p = new("producer", this);    c = new("consumer", this);    p.put_port.connect(c.put_export);  // D  endfunctionendclass// end codeblock top//----------------------------------------------------------------------// environment env//----------------------------------------------------------------------// begin codeblock envclass env extends ovm_env;  top t;  function new(string name = "env");    super.new(name);    t = new("top", this);  endfunction  task run;    #1000;	global_stop_request();  endtaskendclass// end codeblock envendpackage//----------------------------------------------------------------------// module top//----------------------------------------------------------------------// begin codeblock topmodmodule top;  import user_pkg::*;  env e;  initial begin    e = new("e");    e.run_test();  endendmodule// end codeblock topmod