| // |
| //------------------------------------------------------------// |
| // Copyright 2009-2012 Mentor Graphics Corporation // |
| // All Rights Reserved Worldwid // |
| // // |
| // 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. // |
| //------------------------------------------------------------// |
| |
| //----------------------------------------------------------------------------- |
| // Title: Another SV producer |
| // |
| // Topic: Description |
| // |
| // A simple SV producer TLM model that generates a configurable number of |
| // ~uvm_tlm_generic_payload~ transactions. The model uses the TLM2 |
| // blocking interface, whose semantic guarantees the transaction is fully |
| // completed upon return from the ~b_transport~ call. Thus, we can reuse the |
| // transaction each iterationi and need only allocate the transaction once. |
| // |
| // Instead of a port, an initiator socket could have been used. To do this, |
| // comment-out the current declaration for ~out~ and uncomment the socket |
| // declaration. Of course, any connected to the new ~out~ port must now be |
| // compatible with the ~b_inititator_socket~. |
| // |
| // Normally, a monitor, not the producer, emits observed transactions |
| // through an analysis port. |
| // |
| // While trivial in functionality, the model demonstrates use of TLM ports |
| // to facilitate external communication. |
| // |
| // - Users of the model are not coupled to its internal implementation, using |
| // only the provided TLM port and socket to communicate. |
| // |
| // - The model itself does not refer to anything outside its encapsulated |
| // implementation. It does not know nor care about what might |
| // be driving its ~in~ socket or who might be listening on its ~ap~ |
| // analysis port. |
| //----------------------------------------------------------------------------- |
| |
| // (inline source) |
| import uvm_pkg::*; |
| `include "uvm_macros.svh" |
| |
| class producer extends uvm_component; |
| |
| //uvm_tlm_b_initiator_socket #() out; |
| uvm_tlm_b_transport_port #(uvm_tlm_gp) out; |
| uvm_analysis_port #(uvm_tlm_gp) ap; |
| |
| `uvm_component_utils(producer) |
| |
| function new(string name, uvm_component parent=null); |
| super.new(name,parent); |
| out = new("out", this); |
| ap = new("ap", this); |
| endfunction |
| |
| task run_phase (uvm_phase phase); |
| |
| // Allocate GP once |
| uvm_tlm_gp gp = new; |
| uvm_tlm_time delay = new("del",1e-12); |
| int num_trans = 2; |
| |
| // Keep the "run" phase from ending |
| phase.raise_objection(this); |
| |
| // Get number of transactions desired (default=2) |
| uvm_config_db #(uvm_bitstream_t)::get(this,"","num_trans",num_trans); |
| |
| // Iterate N times, randomizing transaction, setting delay |
| for (int i = 0; i < num_trans; i++) begin |
| |
| delay.set_abstime(10,1e-9); |
| assert(gp.randomize() with { gp.m_byte_enable_length == 0; |
| gp.m_length inside {[1:8]}; |
| gp.m_data.size() == m_length; } ); |
| `uvm_info("PRODUCER/PKT/SEND",{"\n",gp.sprint()},UVM_MEDIUM) |
| |
| // Send to analysis |
| out.b_transport(gp,delay); |
| if (gp.get_response_status() == UVM_TLM_COMPLETED) |
| ap.write(gp); |
| end |
| #100; |
| `uvm_info("PRODUCER/END_TEST", |
| "Dropping objection to ending the test",UVM_LOW) |
| phase.drop_objection(this); |
| endtask |
| |
| endclass |
