UEFI Platform Initialization

The Platform Initialization 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.

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