The Platform Initialization Specification (PI Specification) is a specification published by the Unified EFI Forum that describes the internal interfaces between different parts of computer platform firmware. 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 specification.
Platform Initialization Specification 1.3 Released March 2013
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
- UEFI Forum (2007-03-27). "UEFI Forum Promotes Industry Adoption of Extensible Firmware with New Specifications, Interoperability Events and the Formation of Its Industry Communications Working Group". Retrieved 2011-08-11.