cacheflush.h

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#ifndef __ASM_CACHEFLUSH_H
#define __ASM_CACHEFLUSH_H

/* Keep includes the same across arches.  */
#include <linux/mm.h>

/*
 * The cache doesn't need to be flushed when TLB entries change when
 * the cache is mapped to physical memory, not virtual memory
 */
#define flush_cache_all()           do { } while (0)
#define flush_cache_mm(mm)          do { } while (0)
#define flush_cache_dup_mm(mm)          do { } while (0)
#define flush_cache_range(vma, start, end)  do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)  do { } while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_page(page)         do { } while (0)
#define flush_dcache_mmap_lock(mapping)     do { } while (0)
#define flush_dcache_mmap_unlock(mapping)   do { } while (0)
#define flush_icache_range(start, end)      do { } while (0)
#define flush_icache_page(vma,pg)       do { } while (0)
#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
#define flush_cache_vmap(start, end)        do { } while (0)
#define flush_cache_vunmap(start, end)      do { } while (0)

#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
    do { \
        memcpy(dst, src, len); \
        flush_icache_user_range(vma, page, vaddr, len); \
    } while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
    memcpy(dst, src, len)

#endif /* __ASM_CACHEFLUSH_H */