Glossary – Intel Extensible Firmware Interface User Manual
Page 1049
Version 1.10
12/01/02
Glossary-1
Glossary
_ADR
A reserved name in
name space. It refers to an address on a bus that has
standard enumeration. An example would be PCI, where the enumeration
method is described in the PCI Local Bus specification.
_CRS
A reserved name in
name space. It refers to the current resource setting of
a device. A _CRS is required for devices that are not enumerated in a standard
fashion. _CRS is how ACPI converts nonstandard devices into Plug and Play
devices.
_HID
A reserved name in
name space. It represents a device’s plug and play
hardware ID and is stored as a 32-bit compressed EISA ID. _HID objects are
optional in ACPI. However, a _HID object must be used to describe any device
that will be enumerated by the ACPI driver in the OS. This is how ACPI deals
with non–Plug and Play devices.
_UID
A reserved name in
name space. It is a serial number style ID that does
not change across reboots. If a system contains more than one device that reports
the same
, each device must have a unique _UID. The _UID only needs to
be unique for device that have the exact same _HID value.
ACPI Device Path A
that is used to describe devices whose enumeration is not
described in an industry-standard fashion. These devices must be described
using ACPI AML in the
name space; this type of node provides linkage to
the ACPI name space.
ACPI
Refers to the Advanced Configuration and Power Interface Specification and to
the concepts and technology it discusses. The specification defines a new
interface to the system board that enables the operating system to implement
operating system-directed power management and system configuration.
Base Code (BC) The
Base Code, included as a core protocol in
, is comprised of a
simple network stack (UDP/IP) and a few common network protocols (
Bootserver Discovery,
) that are useful for remote booting machines.
BC
Big Endian
A memory architecture in which the low-order byte of a multibyte datum is at the
highest address, while the high-order byte is at the lowest address. See
BIOS Boot Specification Device Path
that is used to point to boot legacy operating systems; it is based
on the BIOS Boot Specification, Version 1.01.