Root Port Error FIFO Read Register (Offset 0x154)

Root Port Error FIFO Read Register (Offset 0x154) - 3.0 English

AXI Bridge for PCI Express Gen3 Subsystem Product Guide (PG194)

Document ID

PG194

Release Date

2023-11-24

Version

3.0 English

The Root Port Error FIFO Read Register reads from this location return queued error (Correctable/Non-fatal/Fatal) messages. Data from each read follows the format shown in the following table. For EP configurations, read returns zero.

Reads are non-destructive. Removing the message from the FIFO requires a write. The write value is ignored.

Table 1. Root Port Error FIFO Read Register
Bits	Name	Core Access	Description
15:0	Requester ID	RWC	Requester ID belonging to the requester of the error message.
17:16	Error Type	RWC	Indicates the type of the error. 00b: Correctable 01b: Non-Fatal 10b: Fatal 11b: Reserved
18	Error Valid	RWC	Indicates whether read succeeded. 1b: Success 0b: No message to read
31:19	Reserved	RO	Reserved