• Alexey Brodkin's avatar
    arc: Add our own implementation of fb_pgprotect() · e5e0a65c
    Alexey Brodkin authored
    During mmaping of frame-buffer pages to user-space
    fb_protect() is called to set proper page settings.
    
    In case of ARC we need to mark pages that are mmaped to
    user as uncached because of 2 reasons:
     * Huge amount of data if passing through data cache will
       thrash cache a lot making cache almost useless for other
       less traffic hungry processes.
     * Data written by user in FB will be immediately available for
       hardware (such as PGU etc) without requirements to flush data
       cache regularly.
    Signed-off-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
    Cc: linux-snps-arc@lists.infradead.org
    Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
    e5e0a65c
fb.h 372 Bytes