Errata
40
Specification
Update
Implication:
When this erratum occurs, data corruption may occur.
Workaround:
It is possible for the BIOS to contain a workaround for this erratum.
Status:
For the steppings affected, see the
Summary Tables of Changes.
30.
Stale Data in Processor Translation Cache May Result in Hang
Problem:
Several instructions and task switches normally invalidate the processor translation
cache. Under an internal boundary condition these instructions or task switches may
not completely invalidate the processor translation cache.
Implication:
When this erratum occurs, subsequent processor load and store operations may use
stale translations leading to unpredictable results.
Workaround:
It is possible for BIOS code to contain a workaround for this erratum.
Status:
For the steppings affected, see the
Summary Tables of Changes.
31.
I/O Buffers for FERR#, PROCHOT# and THERMTRIP# Are Not AGTL+
Problem:
The I/O buffers for the FERR#, PROCHOT# and THERMTRIP# signals are specified in
the
Intel
®
Pentium
®
4 Processor in the 423-pin Package Datasheet
as AGTL+ buffers.
The buffers for these signals were instead designed with CMOS buffers.
Implication:
It is not expected that any platforms will be affected by this erratum.
Workaround:
None necessary.
Status:
For the steppings affected, see the
Summary Tables of Changes.
32.
RFO and Correctable Error Combination May Cause Lost Store or
Hang
Problem:
The processor may lose a store operation or the system may hang in the following
scenario:
•
Error reporting is not enabled in the IA32_MC1_CTL register, and
•
The processor issues a Read for Ownership (RFO) that hits an L2 cache line in the
Exclusive or Modified state.
•
This RFO access receives a correctable error that occurs at the same time this
cache line is hit by an external snoop.
Implication:
When this erratum occurs a store operation will be lost, or the system will hang. This
erratum has only been observed in a focused testing environment.
Workaround:
None identified.
Status:
For the steppings affected, see the
Summary Tables of Changes.
33.
RFO and Correctable Error May Incorrectly Signal the Machine Check
Handler