Intel 460GX Software Developer’s Manual page 117

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