Datasheet
Intel
®
E8870 Scalable Node Controller (SNC) Datasheet 3-33
Configuration Registers
3.9 Error Registers
3.9.1 ERRCOM: Error Command
This register enables error checking and flagging on various error conditions.
3.9.2 FERRST: First Error Status
Errors are classified into two basic types: fatal (or non-recoverable) and non-fatal (or recoverable).
Non-fatal errors are further classified into correctable and non-correctable errors. First fatal and/or
non-fatal errors are flagged in the FERRST register. At most, two errors can be reported by the
FERRST; one for non-recoverable (or fatal) errors, one for recoverable (or uncorrectable and
correctable) errors. If errors of the same type (non-recoverable or recoverable) are detected
simultaneously, the error with the more significant bit is flagged.
Associated with some of the errors flagged in the FERRST register are control and data logs. When
an error is detected by an SP, a field in the FERRST register identify which SP has the
corresponding error log. Once a first error for a type of error has been flagged (and logged), the log
registers for that error type remain fixed until either the bit associated with the error type in the
FERRST is cleared or a power-up reset (See 8.2.1, Power-up Reset Sequence). Contents of the
error logs are not reliable unless an error associated with the log is reported in FERRST.
When the first error of a type is detected (fatal, uncorrectable, correctable), the value of the error
status pin associated with the error type is latched in the FERRST register.
See Chapter 6, “Reliability, Availability, and Serviceability” for detailed description of each error,
the response, what is logged, and the name of the log register.
Device: NodeID
Function: 2
Offset: A4h
Bit Attr Default Description
31:9 RV 0 Reserved
8:4 RV 11111 Reserved
3RV0 Reserved
2RW0
FTLFRZ: Error Freeze on Fatal Error
0 = Normal operation.
1 = Disable processor and SP interfaces when a Fatal error is observed or
signaled on the error pins.
1RW0
NCOFRZ: Error Freeze Upon Non-correctable Error
0 = Normal operation.
1 = Disable processor and SP interfaces when a non-correctable error is
observed or signaled on the error pins.
0RW0
CORFRZ: Error Freeze Upon Recoverable Error
0 = Normal operation.
1 = Disable processor and SP interfaces when a correctable error is observed
or signaled on the error pins.