• Oliver O'Halloran's avatar
    powerpc/boot: Add OPAL console to epapr wrappers · 656ad58e
    Oliver O'Halloran authored
    This patch adds an OPAL console backend to the powerpc boot wrapper so
    that decompression failures inside the wrapper can be reported to the
    user. This is important since it typically indicates data corruption in
    the firmware and other nasty things.
    
    Currently this only works when building a little endian kernel. When
    compiling a 64 bit BE kernel the wrapper is always build 32 bit to be
    compatible with some 32 bit firmwares. BE support will be added at a
    later date. Another limitation of this is that only the "raw" type of
    OPAL console is supported, however machines that provide a hvsi console
    also provide a raw console so this is not an issue in practice.
    Actually-written-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: default avatarOliver O'Halloran <oohall@gmail.com>
    [mpe: Move #ifdef __powerpc64__ to avoid warnings on 32-bit]
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    656ad58e
opal-calls.S 1.2 KB