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

Intel NetStructure® MPCBL0001 High Performance Single Board Computer

Contents

Figure 11. Flow Diagram for Graceful Reboot Command

OS Agent	IPMC		CMM
KCS Interface		IPMB Interface
		Cmmset –l bladex –d frucontrol –v 2	1
	2
3
Asserts SMS_ATN signal
4
Get Message

1.MM sends a frucontrol=2 command to IPMC, initiating a graceful reboot.

2.When the IPMC receives frucontrol=2, it formats a message into the send message queue and sets the SMS attention flag (SMS_ATN) on the KCS status register.

3.OS Agent polls for SMS_ATN using Get Message Flags command.

4.OS Agent sends a Get Message command to the IPMC to retrieve the message from the receive message queue. The Get Message command returns the following data:

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.

Technical Product Specification 71

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