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    UEFI - Wikipedia

    Unified Extensible Firmware Interface is a specification that defines the architecture of the platform firmware used for booting the computer hardware and its interface for interaction with the operating system. Examples of firmware that implement the specification are AMI Aptio, Phoenix SecureCore, TianoCore EDK โ€ฆ See more

    The original motivation for EFI came during early development of the first Intelโ€“HP Itanium systems in the mid-1990s. BIOS limitations (such as 16-bit real mode, 1 MB addressable memory space, assembly language programming, โ€ฆ See more

    The interface defined by the EFI specification includes data tables that contain platform information, and boot and runtime services that โ€ฆ See more

    Services
    EFI defines two types of services: boot services and runtime services. Boot services are โ€ฆ See more

    SEC โ€“ Security Phase
    This is the first stage of the UEFI boot but may have platform specific binary code that precedes it. (e.g., Intel ME, AMD PSP, CPU See more

    Features image
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    Processor compatibility
    As of version 2.5, processor bindings exist for Itanium, x86, x86-64, ARM (AArch32) and ARM64 (AArch64). Only little-endian processors can be โ€ฆ See more

    UEFI machines can have one of the following classes, which were used to help ease the transition to UEFI:
    โ€ข See more

    Implementations
    Intel's implementation of EFI is the Intel Platform Innovation Framework, codenamed Tiano. โ€ฆ See more

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