(2019/03/08)

平台初始化 (PI)

UEFI 平台初始化(PI) 描述開機執行面到周圍UEFI支援的協定和服務等。 PI從遵循EFI規範的原始Intel®平台創新韌體發展而來。當UEFI主要針對韌體與作業系統之間的介面層，PI則專注於低階韌體元件介面層之間。

由UEFI論壇的平台初始化工作群組(PLATFORM INITIALIZATION WORK GROUP)(PIWG)管理規範開發。

" PEI和DXE規範由Intel與相關規範編制者以工作群組多數決來制定。 這些規範實現方式是用來當作初始化電腦系統的韌體以及在UEFI規範的介面層之下的實現。至於實現PEI和DXE不會需要UEFI的承認。" - http://uefi.org/workinggroups

更多資訊: UEFI與PI的FAQ | PI的開機流程 | PI 開機階段圖

原文

Platform Initialization (PI)

UEFI Platform Initialization (PI) describes the boot execution phases to encompass UEFI supported protocols and services. PI evolved from the original Intel® Platform Innovation Firmware for EFI Specification. While UEFI primarily focuses on the interface between firmware and the operating system, PI focuses on interfaces between low-level firmware components.

The PLATFORM INITIALIZATION WORK GROUP (PIWG) of the UEFI Forum manages specification development.

"The PEI and DXE specifications authored by Intel and other related specifications as mutually agreed to by a majority of the work group. Implementations of these specifications are intended to serve as firmware for initializing a computer system and are intended to be implementations below the interface layer presented by the UEFI Specification. Implementations of PEI and DXE would not be required for UEFI compliance." - http://uefi.org/workinggroups

More information: UEFI & PI FAQ | PI Boot Flow | PI Boot Phases