Jump to content

uvm_object with hierarchy?

Recommended Posts

I am writing a class that contains some abstracted logic.  Specifically, it has some arbitration methods that could be redefined in an extension.  Objects of this type will be used by sequences.  This class will also need to be able to get information from the config_db using hierarchical paths, and plain old uvm_objects don't have hierarchy.


Because this will be created during the run_phase it can't extend uvm_component, and it wouldn't make sense for this class to have phases anyways.  It could extend uvm_sequence_item, however it doesn't make sense for this object to be started on a sequencer.


It seems like UVM is missing something like a vanilla uvm_hierarchical_object.  I am making do using the follow pattern highly leveraged from looking at the UVM source code:



class MyClass extends uvm_object;


   protected uvm_object m_parent;
   protected string m_name;

   function new(string name = "MyClass");
   endfunction // new

   virtual function void set_name(string name);

   virtual function void set_parent(uvm_object parent);
      if (parent == this) begin
         `uvm_fatal("THISPARENT", "cannot set the parent of an object to itself")
      m_parent = parent;

   virtual function uvm_object get_parent();
      return m_parent;

   protected virtual function void m_set_full_name();
      if (m_parent == null)
        m_name = get_name();
        m_name = {m_parent.get_full_name(),".",get_name()};

   virtual function string get_full_name();
      if (m_name == "")
        return get_name();
        return m_name;



Unfortunately, I can't use the uvm_component_utils macros because they assume uvm_component type.  And the uvm_object_utils macros assume there is no parent.  So I need to still make my own utils macro, but for the moment I'm getting by, by manually calling set_parent() after I create the object.


Anyone else already solve this?  Will something like this make its way into official UVM code?




Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...