Intel CONTROLLERS 413808 - Manual (Page 496)

Intel
®
413808 and 413812—System Controller (SC) and Internal Bus Bridge
Intel ® 413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual October 2007
496 Order Number: 317805-001US
7.3.7.2 Bridge South Internal Bus Interface Error
The following conditions may be encountered by the Bridge South Interface:
• Master Abort on the South Internal Bus interface. This condition may happen when
the bridge attempts an address request on the south internal bus and the request
is not claimed by any target. The bridge would log the error as a master abort.
— For a write request, the bridge logs the master abort error condition and
discard the write data.
— For a read request, the Bridge logs the master abort. In addition, the Bridge
completes the read completion as follows: it indicates to the initiating agent on
the north internal bus that it encountered an error by performing a target abort
during the read completion.
• Address Request Error on the south internal bus interface. This condition may
happen when a target on the south internal bus detected an error during the
address request. For example, the target may indicate that the byte-count is out of
range or the target detected an address parity error.
— For a write request, the bridge logs the address request error condition and
discard the write data.
— For read request, the Bridge logs the address request error. In addition, the
Bridge completes the read completion as follows: it indicates to the initiating
agent on the north internal bus that it encountered an error by performing a
target abort during the read completion.
• Target Abort on the south internal bus. This condition may occur when a target
claimed a previously issued read request, but is unable to return the read
completion data. The bridge would log the error as a target abort.
— The Bridge logs the target abort. In addition, the Bridge completes the read
completion as follows: it indicates to the initiating agent on the north internal
bus that it encountered an error by performing a target abort during the read
completion. Address Parity Error on the south internal bus. This condition may
occur when the Bridge south interface is acting as a target and either observes
AERR asserted by another target on the south internal bus, or detects an
address parity error while claiming an address request.