Drop all objection manually in UVM

Test requirement is like,

1) When polling for more than one interrupts by continuously reading different registers in parallel and based on some indication move to next phase of UVM

2) Waiting for some timer to be expired and then moving to next phase of UVM

Let’s take one scenario where,

Driver is raising objection but never dropping objection and requirement is to move to next phase (extract_phase) after #50 timeunit. But because all the objection are not dropped in run_phase, simulation is not going to extract_phase.

Let’s go through example.

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Now let’s take another scenario,

Here driver is dropping objection after #105 timeunit. So simulation will move to next phase after #105. But the requirement is to move to next phase which is extract_phase after #50.

Let’s go through example.

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To fulfill the requirement we need to any how drop the pending objection after #50 to move to next phase after #50.

We can do this by getting list of all uvm_components (through get_objector method of uvm_objection class) who raised objection and then we can manually drop the objection after #50 timeunit.

Let’s go through example.

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Reference:

1) uvm_objection.svh file