Intel MPCBL0001 manual Diagnostic Interrupt, Returned Values from the Get Message Command

Hardware Management Overview

Table 36.	Returned Values from the Get Message Command
	Byte	Data	Value	Comments
	1	Completion Code	00h
	2	Channel	40h	Administrator privilege, Channel 0 (IPMB 0)
	3	NetFN/rsLUN	C2h	NetFn=30h, Responder LUN=02h (SMS)
	4	Header checksum	3Eh	2’s complement of the previous byte (chk1)
	5	BMC Address	(varies)	Board’s IPMB address (depends on slot)
	6	Sequence/rqLUN	04h	Sequence=01h, Requestor LUN=00h (IPMB)
	7	Command	10h	Intel’s command for shutdown/reboot
	8	Data	02h	Reboot action
	9	Data checksum	5F	2’s complement of the sum of the previous 4 bytes (chk2)

3.15.4Diagnostic Interrupt

The following command provides the capability for an end user to issue a non-maskable interrupt (NMI) to the payload.

When issued, the NMI signal to the processor will be asserted. To fully utilize the support of this command, the user needs to have an NMI handler installed.

The implementation details are as below:

Figure 12. Diagnostic Interrupt Command Implementation

CPU	IPMC		CMM
(H_NMI)
GPIO		IPMB Interface
		Cmmset –l bladex –d frucontrol –v 3	1
2
Asserts NMI signal

1.CMM sends a frucontrol=3 command to IPMC initiating a diagnostic interrupt.

2.When the IPMC receives frucontrol=3, it asserts the NMI signal to the CPU via the GPIO pins connected to the H_NMI pin.

Intel NetStructure® MPCBL0001 High Performance Single Board Computer 69

Technical Product Specification