• Paul Burton's avatar
    MIPS: Sanitise coherentio semantics · f2302023
    Paul Burton authored
    The coherentio variable has previously been used as a boolean value,
    indicating whether the user specified that coherent I/O should be
    enabled or disabled. It failed to take into account the case where the
    user does not specify any preference, in which case it makes sense that
    we should default to coherent I/O if the hardware supports it
    (hw_coherentio is non-zero).
    
    Introduce an enum to clarify the 3 different values of coherentio & use
    it throughout the code, modifying plat_device_is_coherent() &
    r4k_cache_init() to take into account the default case.
    Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
    Cc: linux-mips@linux-mips.org
    Cc: Paul Burton <paul.burton@imgtec.com>
    Patchwork: https://patchwork.linux-mips.org/patch/14347/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    f2302023
dma-coherence.h 1.68 KB