UVM- How to get config object from config db to the tb_top

Question

I have some forces (interface to dut) in my tb_top file.

For example:

      // rx forces and assignments
   assign rx_vif.chind2 = dut.rx_fe.chind2;
      initial begin
                force dut.rx_fe.x = rx_vif.x;
      end
   end

I want to execute above only if the rx_agent is active.

For this I have to get the rx_agent_config object to the tb_top like this:

  if(!uvm_config_db #(rx_agent_config)::get(this, "", "db_rx_agent_config", m_rx_cfg)) begin
            `uvm_error("top", "rx_agent_config not found")
  end//if

THhe code for set:

 uvm_config_db #(rx_agent_config)::set(this, "*", "db_rx_agent_config", m_cfg.m_rx_agent_cfg);

What should I write instead of this (in the get function)?

http://stackoverflow.com/questions/19840611/best-way-to-access-the-uvm-config-db-from-the-testbench/19882169#19882169 — nguthrie, Nov 28 '16 at 17:20
@nguthrie I tried it but I got error when I run It. UVM_ERROR ../sv/girobo2_tb_top.sv(175) @ 0: reporter [top] rx_agent_config not found — sara8d, Nov 28 '16 at 17:41
You probably need to include your environment code in a package and then import it into your tb_top — nguthrie, Nov 28 '16 at 21:44
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/129389/discussion-between-karan-shah-and-sara8d). — Karan Shah, Nov 30 '16 at 03:35

score 0 · Answer 1 · answered Dec 23 '16 at 17:03

Supposed that your component name is "comp" in ENV, and the env is named "env" in the uvm_test, so in test bench top module, you should use below code to get the configuration handle

uvm_config_db#(rx_agent_cfg)::get(null, "uvm_test_top.env.comp", "db_rx_agent_cfg", rx_cfg);

Because the earliest time you could set "rx_agent_cfg" in the uvm_config_db is 0 time in build_phase, so it is safe to do get after a #0 delay in the initial block.

UVM- How to get config object from config db to the tb_top

1 Answers1