Technical Product Specification

Table Of Contents
Intel
®
Server Board S5400SF TPS Server Management
Revision 2.02
Intel order number: D92944-007
51
The power, sleep, reset, front panel NMI, and ID buttons are unprotected.
The Integrated BMC detects that the system has exited the ACPI S1 sleep state when it is
notified by the BIOS SMI handler.
4.2.5 ACPI S4 Support
The following events occur when the ACPI S4 state is entered:
The fans are stopped.
The normal operating system boot process is not followed while exiting from hibernated
state.
The original context is maintained from hibernated to working state.
The power, sleep, reset, front panel NMI, and ID buttons are unprotected.
4.2.6 ACPI S5 Support
The following event occurs when the ACPI S5 state is entered:
The front panel buttons are not locked.
The fans are stopped.
The power-up process goes through the normal boot process.
The power, sleep, reset, front panel NMI, and ID buttons are unprotected.
The system’s context is not preserved by the hardware. The system must be restarted to
return to the working state.
4.2.7 ACPI Power State Notify
If enabled through the Set ACPI Configuration Mode commands, the Integrated BMC sends the
system’s ACPI power state changes (S0, S1, S3, S4, and S5) to other management controllers
by sending the Set ACPI Power State command on the IPMB as indicated by their SDR
management device records. The command is sent whenever there is a power state transition.
4.3 System Initialization
4.3.1 Processor TControl Setting
Processors used with the Intel
®
Server Boards and systems that use the Intel
®
5400 Chipset
implement a feature called Tcontrol. Tcontrol provides a processor-specific value that can be
used to adjust the fan control behavior to achieve optimum cooling and acoustics. These values
are not directly accessible by the Integrated BMC. The BIOS reads these values during POST
and communicates processor Tcontrol values to the Integrated BMC. The Integrated BMC uses
these values to adjust the hardware configuration appropriately.
4.3.2 Fault Resilient Booting (FRB)
Fault resilient booting (FRB) is a set of BIOS and Integrated BMC algorithms and hardware
support that, under certain conditions, allows a multiprocessor system to boot even if the
bootstrap processor (BSP) fails. The FRB algorithms detect BSP failure, disable the failed
processor, and reset the server with a different processor as the BSP. Only FRB2 is supported,
using watchdog timer commands.