• Simon Glass's avatar
    efi: Add support for loading U-Boot through an EFI stub · 476476e7
    Simon Glass authored
    It is useful to be able to load U-Boot onto a board even if is it already
    running EFI. This can allow access to the U-Boot command interface, flexible
    booting options and easier development.
    
    The easiest way to do this is to build U-Boot as a binary blob and have an
    EFI stub copy it into RAM. Add support for this feature, targeting 32-bit
    initially.
    
    Also add a way to detect when U-Boot has been loaded via a stub. This goes
    in common.h since it needs to be widely available so that we avoid redoing
    initialisation that should be skipped.
    Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
    Improvements to how the payload is built:
    Signed-off-by: default avatarBin Meng <bmeng.cn@gmail.com>
    Reviewed-by: default avatarBin Meng <bmeng.cn@gmail.com>
    Tested-by: default avatarBin Meng <bmeng.cn@gmail.com>
    476476e7
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