Artesyn ATCA-9305 User's Manual (May 2014) - Manual (Page 206)

System Management
ATCA-9305 User’s Manual (10009109-07) 206
Under certain circumstances, some sensors connected to the IPMC can generate Event
Messages for the system management controller. To enable these messages, the system
management controller must send a Set Event Receiver command to the IPMC, along with the
address of the Event Receiver.
Table 7-49 shows the format of an Event Message:
Event-generating sensors with a Threshold Event/Reading Type (0x01) initiate an event
message when a sensor reading crosses the defined threshold. The default thresholds for a
particular sensor are retrieved by sending the IPMC a Get Sensor Thresholds command. The
system management controller must send the IPMC a Get Sensor Reading command to
retrieve the current sensor reading. Refer to the IPMI specification listed in
Table A-2 for
complete details on using these commands.
Table 7-49 Event Message Format
Byte 1 Field Description
0 RsSA Responder’s Slave Address (Address of Event Receiver)
1 NetFn/RsLUN Net Function Code (0x04) in upper 6 bits; Responder’s LUN in lower 2
bits
2 Chk 1 Checksum #1
3 RqSA Requester’s Slave Address (Address of our board on IPMB)
4 RqSeq/RqLUN Request Sequence number in upper 6 bits; Requester’s LUN in lower 2
bits
5 Cmd Command (Always 0x02 for event message)
6 EvMRev Event Message Revision (0x04 for IPMI 1.5)
7 Sensor Type Indicates event class or type of sensor that generated the message
8 Sensor Number A unique number indicating the sensor that generated the message
9 Event D ir/Event
Type Upper bit indicates direction (0 = Assert, 1= Deassert); Lower 7 bits
indicate type of threshold crossing or state transition
10 Event Data 0 Data for sensor and event type
11 Event Data 1 (Optional) Data for sensor and event type
12 Event Data 2 (Optional) Data for sensor and event type
13 Chk2 Checksum #2
Each byte has eight bits.