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Intel® Server Platform SR870BH2

SR870BH2 Machine Check Error Handling

This section gives an overview of the implementation of machine check error handling on the

Server Platform SR870BH2. For additional details about Itanium-based system error generation

and error handling, refer to the Itanium® Processor Family Error Handling Guide (document

number: 249278-002) and the Itanium® System Abstraction Layer Specification (document

number: 245359-005). Both documents can be downloaded from the web at

www.developer.intel.com.

The goal of MCA is to contain errors and correct as many as possible before they propagate to

network or permanent storage. If an error cannot be fixed by the hardware or firmware, and the

OS cannot handle it, the machine shall be reset. MCA errors include ECC, BINIT, BERR,

SERR, and PERR. These conditions are handled by the BIOS through SAL 3.0-compatible

services.

5.1

Classification of Errors

Error events are classified by the processor and platform into three basic groups. This section

provides a summary of the different error types and signaling methods defined by the Itanium

Machine Check Architecture (MCA) and implemented in the Server Platform SR870BH2.

5.2

Error Types

Fatal: A fatal error is an error where the state has been corrupted and the error may, or

may not, be contained. The platform will signal a fatal error when the integrity of the

platform or subsystem cannot be determined. These errors cannot be corrected by

hardware, firmware, or system software. A reset of the system or subsystem is required.

Recoverable/Uncorrectable: An error has been detected that cannot be corrected by

hardware or firmware. However, the operating integrity of platform hardware and system

state has been maintained. These errors may or may not be recoverable (determined by

system software capabilities).

Correctable: An error has been detected and corrected by hardware, or by

processor/platform firmware.

Revision 1.1

SR870BH2 Machine Check Error Handling