include/asm-generic/cacheflush.h

   1 #ifndef __ASM_CACHEFLUSH_H
   2 #define __ASM_CACHEFLUSH_H
   3
   4 /* Keep includes the same across arches.  */
   5 #include <linux/mm.h>
   6
   7 /*
   8  * The cache doesn't need to be flushed when TLB entries change when
   9  * the cache is mapped to physical memory, not virtual memory
  10  */
  11 #define flush_cache_all()                       do { } while (0)
  12 #define flush_cache_mm(mm)                      do { } while (0)
  13 #define flush_cache_dup_mm(mm)                  do { } while (0)
  14 #define flush_cache_range(vma, start, end)      do { } while (0)
  15 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  16 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
  17 #define flush_dcache_page(page)                 do { } while (0)
  18 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  19 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  20 #define flush_icache_range(start, end)          do { } while (0)
  21 #define flush_icache_page(vma,pg)               do { } while (0)
  22 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
  23 #define flush_cache_vmap(start, end)            do { } while (0)
  24 #define flush_cache_vunmap(start, end)          do { } while (0)
  25
  26 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  27         do { \
  28                 memcpy(dst, src, len); \
  29                 flush_icache_user_range(vma, page, vaddr, len); \
  30         } while (0)
  31 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  32         memcpy(dst, src, len)
  33
  34 #endif /* __ASM_CACHEFLUSH_H */