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Intel® 460GX Chipset Software Developer’s Manual 6-19
Data Integrity and Error Handling
GART Parity Error GXB Continue, use address
as read from GART,
Unconditional XINTR#,
Conditional XBINIT#.
(NOTE: if XBINIT# is
driven, then it is not
required to drive
XINTR#)
FERR_GART Nothing GARTER
R_BINITE
Illegal SMM
Access
GXB Unconditional XBINIT# FERR_GART Nothing
Illegal Address GXB Unconditional XBINIT# FERR_GART Nothing
Illegal OB GART
Access
GXB Unconditional XINTR#,
Conditional XBINIT#,
results undefined.
FERR_PCI Nothing GARTER
R_BINITE
PXB Errors
Detected at
Expander Port
Expander Par-err
on any Header
PXB Set Status. If outbound
error handling is enabled
then assert BINIT#, else
then SERR#, drop
request (no cmplt
returned).
PCISTS [SSE],
ERRSTS[2]
Nothing MODES
[3]
Expander Par-err
on Write Data from
Expander
PXB Set Status. If outbound
error handling in enabled
then poison data as
passed to PCI, else then
SERR# and write out
data as good to PCI.
PCISTS [SSE],
ERRSTS[2]
Nothing MODES
[3]
Expander HF Read
Cmplt. from SAC
PXB PXB: Set Status. Target
abort read to card.
(Received in peer-to-
peer)
PCISTS [STA] Nothing
Expander Par-err
on IB Read Data
PXB Set Status. If outbound
error handling is enabled
then poison data as
passed to PCI, else then
SERR# and pass read
data as good to PCI.
ERRSTS[2],
PCISTS[SSE]
Nothing MODES
[3]
Detected as PCI Master
PCI Par-err on OB
Read Data
Received from
Card
PXB Set Status. Drive
PERR#. Pass data with
good parity to Expander.
(PERR# is optionally
elevated to SERR#)
ERRSTS[5], PCISTS[PE],
PCISTS[DPE]
Nothing
Master Abort on
Read Done by PXB
PXB Return all 1’s PCISTS [RMA] Nothing
Master Abort on
Write Done by PXB
PXB Drop data, normal CMP PCISTS [RMA] Nothing
Target Abort
received by xXB
PXB Return HF to either read
or write. If failed access
is in middle of
transaction then the
remainder of the
transaction is discarded.
PCISTS [RTA] Nothing
PERR# Asserted
by Card
card Optionally turned to
SERR# by PXB.
ERRSTS[6],
PCISTS[DPE]
Nothing
Table 6-1. Error Cases (Cont’d)
Error
Chip
Detecting
System
Action
Status
Register
Log
Register
Qualifier