Intel SDS2 manual SMI Handler, PCI Bus Error, Intel Pentium III Processor Bus Error

BIOS Intel® Server Board SDS2

Table 23: Event Request Message Event Data Field Contents

Event				Event Data
Trigger
Class
Discrete	7:6	00	= Unspecified byte 2
		01 = Previous state and/or severity in byte 2
		10 = OEM code in byte 2
		11	= Sensor specific event extension code in byte 2
	5:4	00	= Unspecified byte 3
		01	= Reserved
		10 = OEM code in byte 3
		11	= Sensor specific event extension code in byte 3
	3:0	Offset from Event Trigger for discrete event state
	Event Data 2
		7:4		Optional offset from ‘Severity’ Event Trigger. (0Fh if unspecified).
		3:0		Optional offset from Event Trigger for previous discrete event state.
	0Fh if unspecified.

6.2.3SMI Handler

The SMI handler handles and logs system level events that are not visible to the server management firmware. The SMI handler, even those that are normally considered to generate an NMI, preprocesses all system errors. The SMI handler sends a command to the BMC to log the event and provides the data to be logged, a Set NMI Source command to indicate BIOS as the source of the NMI, and a BIOS LCD command to display the LCD and LED message(s). A correctable memory error does not generate an SMI. Correctable and uncorrectable memory errors are handled and logged by the BMC.

6.2.3.1PCI Bus Error

The PCI bus defines two error pins, PERR# and SERR#, for reporting PCI parity errors and system errors, respectively.

6.2.3.2Intel® Pentium® III Processor Bus Error

In the case of irrecoverable errors on the host processor bus, proper execution of SMI handler cannot be guaranteed and SMI handler cannot be relied upon to log such conditions. The BIOS SMI handler records the error to the System Event Log only if the system has not experienced a catastrophic failure that compromises the integrity of the SMI handler. The BIOS always enables the error correction and detection capabilities of the processors by setting appropriate bits in processor model specific register (MSR).

38	Revision 1.2
Order Number:	A85874-002