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Intel® Server Board SE7501WV2 TPS BIOS
Revision 1.0
Intel reference number C25653-001
81
in the BMC starting the power-up sequence. Since the processors are not executing, the BIOS
does not participate in this sequence. The hardware receives power good and reset from the
BMC and then transitions to an ON state.
6.12.4.2 On to Off (Legacy)
The ICH3 is configured to generate an SMI due to a power button event. The BIOS services this
SMI and sets the state of the machine in the chipset to the OFF state. The BMC monitors power
state signals from the chipset and de-asserts PS_PWR_ON to the power supply. As a safety
mechanism, the BMC automatically powers off the system in 4-5 seconds if the BIOS fails to
service the SMI.
6.12.4.3 On to Off (ACPI)
If an ACPI operating system is loaded, the power button switch generates a request via SCI to the
operating system to shutdown the system. The operating system retains control of the system and
operating system policy determines the sleep state, if any, into which the system transitions.
6.12.4.4 On to Sleep (ACPI)
If an ACPI operating system is loaded and the power button is configured as a sleep button, the
sleep button switch generates a request via SCI to the operating system to place the system
into sleep mode. The operating system retains control of the system and operating system
policy determines the sleep state, if any, into which the system transitions.
6.12.4.5 Sleep to On (ACPI)
If an ACPI operating system is loaded and the power button is configured as a sleep button, the
sleep button switch generates a wake event to the ACPI chipset and a request via SCI to the
operating system to place the system in the On state. The operating system retains control of
the system and operating system policy determines the sleep state, if any, and the sleep
sources from which the system can wake.
6.12.5 Wired For Management (WFM)
Wired for Management (WFM) is an industry-wide initiative to increase overall manageability
and reduce the total cost of ownership. WFM allows a server to be managed over a network.
The system BIOS supports revision 2.0 of the Wired For Management Baseline Specification. It
also supports the preboot execution environment, as outlined in the WFM baseline specification,
because the system includes an embedded WFM compliant network device.
The system BIOS supports version 2.3 of the System Management BIOS Reference
Specification to help higher-level instrumentation software meet the WFM requirements. The
higher-level software can use the information provided by the system management (SM) BIOS
to instrument desktop management interface (DMI) standard groups that are specified in the
WFM specification.
The BIOS also configures the SYSID table as described in the Network PC System Design
Guidelines, Revision 1.0. This table contains the globally unique ID (GUID) of the baseboard.
The mechanism that sets the GUID in the factory is defined in the SYSID BIOS Support
Interface Requirement Specification, Version 1.2. The caller must provide the correct security
key for this call to succeed.
System BIOS implements: