[top_darjeeling,mailbox,tlt] Test randomized choice of polling vs interrupt-driven behaviour on the core side
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@alees24 is already working on this.
Since Jan 15, 2024.
Component:Darjeeling
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Description
The mailbox TLT that has been added in #20673 uses core-side interrupts to detect mbxReady, then polls for deassertion of busy to mark the end of the transaction.
Either by modification of this test, or creation of a new one, we should randomly select between interrupt and polling driven handling on the core-side for the detection of mbxReady.
Originally posted by @alees24 in https://github.com/lowRISC/opentitan/pull/20673#pullrequestreview-1806183856
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