Computer Hardware User Manual

Intel® 460GX Chipset Software Developer’s Manual 6-15
Data Integrity and Error Handling
6.10 Error Conditions
6.10.1 Table of Errors
Table 6-1 is a list of possible errors found in the system. The table shows the error and the system
action. It also shows the information that is captured on any failure. The captured info is sticky
through reset and can be read through configuration accesses. If the system action is conditional,
then the qualifier column shows what the action is conditional on. Note that for the BINIT#,
XBINIT#, and the interrupts there is a driver enable. If the driver is disabled, then these signals
won’t be active, even if it says Unconditional in the table.
Figure 6-2. SDC Error Data Flow
Check, if bad
poison ECC of
bad chunk. Retire
Correct if 1x;
if 2x write to
DB with bad
parity, flag
status. Set S
SD
1b/8b parity
1b/16b parity
Check and flag
status;
regenerate
new parity, if
incoming is bad
then generate new
parity as bad.
or D bit if error
Correct if 1x; if 2x, then write
into DB with bad parity on chunk
that is bad. Set status. No reporting.
ITID and report
error.
Check parity, if bad
poison ECC of chunk.
Retire ITID and report error.
To
SAC
Data Buffer
To ProcessorFrom Processor
On data to SAC
send with bad
parity if parity
if data is bad in
buffer. Report
error.