UVM Environment

Environment is the container class, It contains one or more agents, as well as other components such as scoreboard, top level monitor, and checker.

Writing UVM Environment

1. Environment is written by extending UVM_ENV.

class mem_model_env extends uvm_env;
  
  `uvm_component_utils(mem_model_env)
    
  // new - constructor
  function new(string name, uvm_component parent);
    super.new(name, parent);
  endfunction : new

endclass : mem_model_env

2. Declare the agent, 

  mem_agent mem_agnt;

3. Create agent, 

  mem_agnt = mem_agent::type_id::create("mem_agnt", this);

UVM environment code,

class mem_model_env extends uvm_env;

  mem_agent mem_agnt;
  
  `uvm_component_utils(mem_model_env)
    
  // new - constructor
  function new(string name, uvm_component parent);
    super.new(name, parent);
  endfunction : new

  // build_phase
  function void build_phase(uvm_phase phase);
    super.build_phase(phase);
    mem_agnt = mem_agent::type_id::create("mem_agnt", this);
  endfunction : build_phase

endclass : mem_model_env