Intel® Server Boards SE7320SP2 and SE7525GP2
System BIOS
Revision 4.0
89
fixed location. Upon entry into the user binary, DX contains a ‘token’ that points to the reserved
bits.
4.9 Operating System Boot, Sleep, and Wake
4.9.1
Microsoft Windows* Compatibility
Intel Corporation and Microsoft Corporation co-author design guides for system designers using
Intel
®
processors and Microsoft* operating systems. These documents are updated yearly to
address new requirements and current trends.
PC200x specifications are intended for systems that are designed to work with Windows 2000*
and Windows XP* class operating systems. The Hardware Design Guide (HDG) for the
Windows XP platform is intended for systems that are designed to work with Windows XP class
operating systems. Each specification classifies the systems further and has requirements
based on the intended usage for that system. For example, a server system that will be used in
small home/office environments has different requirements than one used for enterprise
applications. The BIOS supports HDG 3.0.
4.9.2 Advanced
Configuration
and Power Interface (ACPI)
The BIOS is ACPI 2.0c compliant. The primary role of the BIOS is to provide ACPI tables.
During POST, the BIOS creates the ACPI tables and locates them in extended memory (above
1 MB). The location of these tables is conveyed to the ACPI-aware operating system through a
series of tables located throughout memory. The format and location of these tables is
documented in the publicly available ACPI specification.
To prevent conflicts with a non-ACPI-aware operating system, the memory used for the ACPI
tables is marked as “reserved” in the INT 15h, function E820h.
As described in the ACPI specification, an ACPI-aware operating system generates an SMI to
request that the system be switched into ACPI mode. The BIOS responds by setting up all
system (chipset) specific configuration required to support ACPI, and sets the SCI_EN bit as
defined by the ACPI specification. The system automatically returns to legacy mode on hard
reset or power-on reset.
There are three runtime components to ACPI:
ACPI Tables
: These tables describe the interfaces to the hardware. ACPI tables can
make use of a p-code type of language, the interpretation of which is performed by the
operating system. The operating system contains and uses an ACPI Machine Language
(AML) interpreter that executes procedures encoded in AML and stored in the ACPI
tables. AML is a compact, tokenized, abstract machine language. The tables contain
information about power management capabilities of the system, APICs, and bus
structure. The tables also describe control methods that operating systems can use to
change PCI interrupt routing, control legacy devices in Super I/O, find out the cause of
wake events, and handle PCI hot plugging, if applicable.
ACPI Registers
: The constrained part of the hardware interface, described (at least in
location) by the ACPI tables.
Summary of Contents for SE7320SP2 - 800MHZ Ecc Ddr Xeon
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