Xilinx LogiCORE IP AXI Product Manual page 60

Poison Bit Received on Completion Packet
An Error Poison occurs when the completion TLP EP bit is set, indicating that there is
poisoned data in the payload. When the slave bridge detects the poisoned packet, the Slave
Error Poison (SEP) interrupt is asserted and the SLVERR response is asserted with arbitrary
data on the memory mapped AXI4 bus.
Completer Abort
A Completer Abort occurs when the completion TLP completion status is 0b100 -
Completer Abort. This indicates that the completer has encountered a state in which it was
unable to complete the transaction. When the slave bridge receives a completer abort
response, the Slave Completer Abort (SCA) interrupt is asserted and the SLVERR response is
asserted with arbitrary data on the memory mapped AXI4 bus.
Table 3-6: Slave Bridge Response to Abnormal Conditions
Transfer Type Abnormal Condition
Read Illegal burst type
Write Illegal burst type
Read Unexpected completion
Unsupported Request status
Read
returned
Read Completion timeout
Read Poison bit in completion
Completer Abort (CA) status
Read
returned
Master Bridge Abnormal Conditions
The following sections describe the manner in which the Master Bridge handles abnormal
conditions.
AXI Bridge for PCI Express v2.4
PG055 June 4, 2014
Bridge Response
SIB interrupt is asserted.
SLVERR response given with arbitrary read data.
SIB interrupt is asserted.
Write data is discarded.
SLVERR response given.
SUC interrupt is asserted.
Completion is discarded.
SUR interrupt is asserted.
SLVERR response given with arbitrary read data.
SCT interrupt is asserted.
SLVERR response given with arbitrary read data.
Completion data is discarded.
SEP interrupt is asserted.
SLVERR response given with arbitrary read data.
SCA interrupt is asserted.
SLVERR response given with arbitrary read data.
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Chapter 3: Designing with the Core
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