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Intel® Server Board SE7320SP2 & Intel Server Board SE7525GP2 TPS Platform Management
Revision 2.0
115
After a mBMC reset or power up, the mBMC sets the initial value of the timestamp clock to
0x00000000. It is incremented once per second after that. A SEL event containing a timestamp
from 0x00000000 to 0x140000000 has a timestamp value that is relative to mBMC initialization.
During POST, the BIOS tells the mBMC the current time via the Set SEL Time command. The
mBMC maintains this time, incrementing it once per second, until the mBMC is reset or the time
is changed via another Set SEL Time command.
If the RTC changes during system operation, system management software must synchronize
the mBMC time with the system time. If this is not done, the system should be reset so that
BIOS will pass the new time to the mBMC.
5.2.10 Sensor Data Record (SDR) Repository
The mBMC includes built-in Sensor Data Records that provide platform management
capabilities (sensor types, locations, event generation and access information). The SDR
Repository is accessible via all communication transports. This way, out-of-band interfaces can
access the SDR Repository information if the system is down.
The mBMC supports 2176 bytes of storage for SDR records. The SDR defines the type of
sensor, thresholds, hysteresis values and event configuration. The mBMC supports up to six
threshold values for threshold-based full sensor records, and up to 15 events for non threshold-
based full and compact sensor records. It also supports both low-going and high-going sensor
devices.
5.2.10.1 Initialization Agent
The mBMC implements the internal sensor initialization agent functionality specified in the
Intelligent Platform Management Interface Specification, Version 1.5. When the mBMC
initializes, or when the system boots, the initialization agent scans the SDR repository and
configures the sensors referenced by the SDRs. This includes setting sensor thresholds,
enabling/disabling sensor event message scanning, and enabling/disabling sensor event
messages.
5.2.11 Event Message Reception
The mBMC supports externally (e.g., BIOS) generated events via the Platform Event Message
command. Events received via this command will be logged to the SEL and processed by PEF.
5.2.12 Event Filtering and Alerting
The mBMC implements the following IPMI 1.5 alerting features:
• PEF
• Alert over LAN