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Extensible Firmware Interface Specification
Glossary-14 12/01/02 Version 1.10
Runtime Services Driver
A program that is loaded into runtime services memory and stays resident during
runtime.
Runtime Services Table
A table that contains the firmware entry points for accessing runtime services
functions such as Time Services
and Virtual Memory Services. The table is
accessed through a pointer in the System Table
.
Runtime Services Interfaces that provide access to underlying platform specific hardware that may
be useful during OS runtime, such as timers. These services are available during
the boot process but also persist after the OS loader terminates boot services.
SAL See System Abstraction Layer
.
Serial I/O Protocol
A protocol
that is used during boot services to abstract byte stream devices—that
is, to communicate with character-based I/O devices.
Simple File System Protocol
A component of the File System Protocol
. It provides a minimal interface for
file-type access to a device.
Simple Input Protocol
A protocol that is used to obtain input from the ConsoleIn device. It is one of
two protocols that make up the Console I/O Protocol
.
Simple Network Protocol
A protocol that is used to provide a packet-level interface to a network adapter.
Also called the EFI Simple Network Protocol.
Simple Text Output Protocol
A protocol that is used to control text-based output devices. It is one of two
protocols that make up the Console I/O Protocol
.
SMBIOS See System Management BIOS
.
StandardError The device handle that corresponds to the device used to display error messages
to the user from the boot services environment.
Status Codes Success, error, and warning codes returned by boot services and runtime services
functions.
String All strings in this specification are implemented in Unicode
.
System Abstraction Layer (SAL)
Firmware that abstracts platform implementation differences, and provides the
basic platform software interface to all higher level software.