SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The reception of either of the 8 INTX message codes (ASSERT/DEASSERT of INTA/B/C/D) shall assert/deassert the corresponding HW interrupt event in status register:
The RC does not keep track of the INTx requester, even though the information is available in the incoming TLP’s RequesterID: each legacy interrupt is expected to be used by only one EP function, known apriori by the RC.
When messages are posted, there is no response generated by the RC.
INTx messages can only be received (and the corresponding HW interrupts asserted) when in RC mode.
The HW interrupts have to be maintained disabled when in EP mode.