SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
Once a reset situation occurs, the PCIe subsystem prepares for reset assertion from the device level reset controller. In this mode, all outbound write transactions are discarded and all outbound reads are returned with error. Similarly, all inbound reads/writes are discarded and any pending reads are completed but data is discarded. Additionally, any register reads on local or remote registers regions are returned in error even through data may be correct. Register writes on local registers are executed correctly.
Whenever the reset interrupt is asserted by PCIe subsystem, the host controller should clear the interrupt, perform a clock stop request/ack sequence and issue a local reset to PCIe subsystem.