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All flush_cache() calls in microblaze code are supposed to flush the entire instruction and data caches, so introduce flush_cache_all() helper to handle this. Also, provide implementations for flush_dcache_all() and invalidate_icache_all() so that icache and dcache u-boot commands can work. Signed-off-by: Ovidiu Panait <ovpanait@gmail.com> Link: https://lore.kernel.org/r/20220531181435.3473549-9-ovpanait@gmail.com Signed-off-by: Michal Simek <michal.simek@amd.com>