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Intel NetStructure
®
MPCBL0001 High Performance Single Board Computer 69
Technical Product Specification
Hardware Management Overview
3.15.4 Diagnostic 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:
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.
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)
Figure 12. Diagnostic Interrupt Command Implementation
CPU
(H_NMI)
IPMC CMM
IPMB Interface GPIO
Cmmset –l bladex –d frucontrol –v 3
Asserts NMI signal
1
2