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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.[1] 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.

The latest version of PI is 1.9, released in December 2024.[2]

Contents

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As of version 1.9, the PI specification contains five volumes:[3]

  • 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

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  1. ^ 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". Archived from the original on 2007-09-30. Retrieved 2011-08-11.
  2. ^ "UEFI Forum Releases the UEFI 2.11 Specification and the PI 1.9 Specification To Streamline User Implementations". UEFI Forum. December 16, 2024.
  3. ^ "UEFI Platform Initialization Specification". UEFI Forum. September 2024.
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