Virtual Interface Issue !?!?

UVM
4

Hello

Here is the code that I use and works for me:

module bb_tb ();
   ifc_ulpi ifc_ulpi();

initial
begin
   uvm_config_db#(virtual ifc_ulpi)::set(uvm_top, "", "ifc_ulpi", ifc_ulpi);
   run_test();
end
endmodule

class class_bb_test extends uvm_test;
   virtual ifc_ulpi ifc_ulpi;
   function void build_phase(uvm_phase phase);
      super.build_phase(phase);
      if (!uvm_config_db#(virtual ifc_ulpi)::get(this, "", "ifc_ulpi", this.ifc_ulpi))
         `uvm_fatal("NOVIF",{"virtual interface must be set for: ", get_full_name(),".ifc_ulpi"});

   endfunction
endclass

I think when you use uvm_top for the set it makes that entry visible from the top down to all lower level classes.