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//-------------------------------------------

//      www.verificationguide.com 

//-------------------------------------------

​

//------------------------------------------

// Including UVM Macros, Pkg and base_test

//------------------------------------------

`include "uvm_macros.svh"

import uvm_pkg::*;

`include "basic_test.sv"

​

module tlm_tb;

​

  //---------------------------------------

  // Calling TestCase

  //---------------------------------------

  initial begin

    run_test("basic_test");  

  end  

endmodule

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//      www.verificationguide.com 

//-------------------------------------------

​

class transaction extends uvm_sequence_item;

  //---------------------------------------

  // Variable Declaration

  //---------------------------------------

  rand bit [3:0] addr;

  rand bit       wr_rd;

  rand bit [7:0] wdata;

  //---------------------------------------

  // Utility and Field macros

  //---------------------------------------

  `uvm_object_utils_begin(transaction)

    `uvm_field_int(addr,UVM_ALL_ON)

    `uvm_field_int(wr_rd,UVM_ALL_ON)

    `uvm_field_int(wdata,UVM_ALL_ON)

  `uvm_object_utils_end

  //---------------------------------------

  //Constructor

  //---------------------------------------  

  function new(string name = "transaction");

    super.new(name);

  endfunction

endclass

//-------------------------------------------

//      www.verificationguide.com 

//-------------------------------------------

`include "transaction.sv"

`include "component_a.sv"

`include "component_b.sv"

​

class environment extends uvm_env;

  //---------------------------------------

  // Components Instantiation

  //---------------------------------------

  component_a comp_a;

  component_b comp_b;

  `uvm_component_utils(environment)

  //--------------------------------------- 

  // Constructor

  //---------------------------------------

  function new(string name, uvm_component parent);

    super.new(name, parent);

  endfunction : new

​

  //---------------------------------------

  // build_phase - Create the components

  //---------------------------------------

  function void build_phase(uvm_phase phase);

    super.build_phase(phase);

​

    comp_a = component_a::type_id::create("comp_a", this);

    comp_b = component_b::type_id::create("comp_b", this);

  endfunction : build_phase

  //---------------------------------------

  // Connect_phase 

  //---------------------------------------

  function void connect_phase(uvm_phase phase);

    comp_a.trans_out.connect(comp_b.trans_in);

  endfunction : connect_phase

endclass : environment

//-------------------------------------------

//      www.verificationguide.com 

//-------------------------------------------

`include "sub_component_b_a.sv"

​

class component_b extends uvm_component;

  sub_component_b_a sub_comp_b_a;

  uvm_blocking_put_export#(transaction) trans_in;  

​

  `uvm_component_utils(component_b)

  //--------------------------------------- 

  // Constructor

  //---------------------------------------

  function new(string name, uvm_component parent);

    super.new(name, parent);

    trans_in = new("trans_in", this);

  endfunction : new

  //---------------------------------------

  // build_phase - Create the components

  //---------------------------------------

  function void build_phase(uvm_phase phase);

    super.build_phase(phase);

​

    sub_comp_b_a = sub_component_b_a::type_id::create("sub_comp_b_a", this);

  endfunction : build_phase

  //---------------------------------------

  // Connect_phase 

  //---------------------------------------

  function void connect_phase(uvm_phase phase);

    trans_in.connect(sub_comp_b_a.trans_in);

  endfunction : connect_phase

endclass : component_b

//-------------------------------------------

//      www.verificationguide.com 

//-------------------------------------------

​

`include "environment.sv"

​

class basic_test extends uvm_test;

​

  `uvm_component_utils(basic_test)

  //---------------------------------------

  // env instance 

  //--------------------------------------- 

  environment env;

​

  //---------------------------------------

  // Constructor

  //---------------------------------------

  function new(string name = "basic_test",uvm_component parent=null);

    super.new(name,parent);

  endfunction : new

​

  //---------------------------------------

  // build_phase

  //---------------------------------------

  virtual function void build_phase(uvm_phase phase);

    super.build_phase(phase);

​

    // Create the env

    env = environment::type_id::create("env", this);

  endfunction : build_phase

  //---------------------------------------

  // end_of_elobaration phase

  //---------------------------------------  

  virtual function void end_of_elaboration();

    //print's the topology

    print();  

  endfunction   

endclass : basic_test

//-------------------------------------------

//      www.verificationguide.com 

//-------------------------------------------

​

class sub_component_b_a extends uvm_component;

  transaction trans;

  uvm_blocking_put_imp#(transaction,sub_component_b_a) trans_in;  

​

  `uvm_component_utils(sub_component_b_a)

  //--------------------------------------- 

  // Constructor

  //---------------------------------------

  function new(string name, uvm_component parent);

    super.new(name, parent);

    trans_in = new("trans_in", this);

  endfunction : new

  //---------------------------------------

  // Imp port put method

  //---------------------------------------

  virtual task put(transaction trans);

    `uvm_info(get_type_name(),$sformatf(" Recived trans On IMP Port"),UVM_LOW)

    //#100;

    `uvm_info(get_type_name(),$sformatf(" Printing trans, \n %s",trans.sprint()),UVM_LOW)

  endtask 

​

endclass : sub_component_b_a