SE7210TP1-E Datasheet, PDF (97/145 Pages) Intel Corporation – Intel® Server Board Technical Product Specification

Intel® Server Board SE7210TP1-E TPS
Platform Management Architecture
5.1.8
Watchdog Timer
The National Semiconductor PC87431 integrated management controller implements an IPMI
1.5-compatible watchdog timer. See the IPMI specification for details. SMI and NMI pre-timeout
actions are supported, as are hard reset, power down, and power cycle timeout actions.
5.1.9
System Event Log (SEL)
The National Semiconductor PC87431 integrated management controller implements the logical
System Event Log device as specified in the Intelligent Platform Management Interface
Specification, Version 1.5. The SEL is accessible via all communication transports. In this way,
the SEL information can be accessed while the system is down by means of out-of-band
interfaces. The maximum SEL size that is supported by National Semiconductor PC87431
integrated management controller is 92 entries.
Supported commands are:
• Get SEL Info
• Reserve SEL
• Get SEL Entry
• Add SEL Entry
• Clear SEL
• Get SEL Time
• Set SEL Time
5.1.9.1
Timestamp Clock
The National Semiconductor PC87431 integrated management controller maintains a four-byte
internal timestamp clock used by the SEL and SDR subsystems. This clock is incremented once
per second. It is read using the Get SEL Time command and set using the Set SEL Time
command. The Get SDR Time command can also be used to read the timestamp clock. These
commands are specified in the Intelligent Platform Management Interface Specification, Version
1.5.
After a National Semiconductor PC87431 integrated management controller reset, the National
Semiconductor PC87431 integrated management controller 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 National Semiconductor PC87431 integrated management controller initialization.
The BIOS provides the time to the National Semiconductor PC87431 integrated management
controller during POST. During POST, the BIOS tells the National Semiconductor PC87431
integrated management controller the current RTC time via the Set SEL Time command. The
National Semiconductor PC87431 integrated management controller maintains this time,
incrementing it once per second, until the National Semiconductor PC87431 integrated
management controller is reset or the time is changed via another Set SEL Time command.
If the RTC changes during system operation, system management software synchronizes the
National Semiconductor PC87431 integrated management controller time with the system time.
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