The Platform Initialization Specification (PI Specification) is a
specification
A specification often refers to a set of documented requirements to be satisfied by a material, design, product, or service. A specification is often a type of technical standard.
There are different types of technical or engineering specificati ...
published by the
Unified EFI Forum
UEFI Forum, Inc. is an alliance between technology companies to coordinate the development of the UEFI specifications. The board of directors includes representatives from twelve ''promoter'' companies: AMD, American Megatrends, ARM, Apple, Dell ...
that describes the internal interfaces between different parts of
computer
A computer is a machine that can be programmed to Execution (computing), carry out sequences of arithmetic or logical operations (computation) automatically. Modern digital electronic computers can perform generic sets of operations known as C ...
platform
firmware
In computing, firmware is a specific class of computer software that provides the low-level control for a device's specific hardware. Firmware, such as the BIOS of a personal computer, may contain basic functions of a device, and may provide h ...
.
This allows for more interoperability between firmware components from different sources. This specification is normally, but not by requirement, used in conjunction with the
UEFI
UEFI (Unified Extensible Firmware Interface) is a set of specifications written by the UEFI Forum. They define the architecture of the platform firmware used for booting and its interface for interaction with the operating system. Examples of f ...
specification.
Current version
Platform Initialization Specification 1.7, Released January 2019.
Contents
As of version 1.3, the PI specification contains five volumes:
* Volume 1: Pre-EFI Initialization Core Interface
* Volume 2: Driver Execution Environment Core Interface
* Volume 3: Shared Architectural Elements
* Volume 4: System Management Mode Core Interface
* Volume 5: Standards
References
{{reflist
External links
UEFI Specifications and Tools''Intel Technology Journal'', Volume 15, Issue 01 - "UEFI Today: Bootstrapping the Continuum"
Unified Extensible Firmware Interface