arch/ia64/include/asm/cacheflush.h

   1 #ifndef _ASM_IA64_CACHEFLUSH_H
   2 #define _ASM_IA64_CACHEFLUSH_H
   3
   4 /*
   5  * Copyright (C) 2002 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8
   9 #include <linux/page-flags.h>
  10 #include <linux/bitops.h>
  11
  12 #include <asm/page.h>
  13
  14 /*
  15  * Cache flushing routines.  This is the kind of stuff that can be very expensive, so try
  16  * to avoid them whenever possible.
  17  */
  18
  19 #define flush_cache_all()                       do { } while (0)
  20 #define flush_cache_mm(mm)                      do { } while (0)
  21 #define flush_cache_dup_mm(mm)                  do { } while (0)
  22 #define flush_cache_range(vma, start, end)      do { } while (0)
  23 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  24 #define flush_icache_page(vma,page)             do { } while (0)
  25 #define flush_cache_vmap(start, end)            do { } while (0)
  26 #define flush_cache_vunmap(start, end)          do { } while (0)
  27
  28 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  29 #define flush_dcache_page(page)                 \
  30 do {                                            \
  31         clear_bit(PG_arch_1, &(page)->flags);   \
  32 } while (0)
  33
  34 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  35 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  36
  37 extern void flush_icache_range (unsigned long start, unsigned long end);
  38 extern void clflush_cache_range(void *addr, int size);
  39
  40
  41 #define flush_icache_user_range(vma, page, user_addr, len)                                      \
  42 do {                                                                                            \
  43         unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK);  \
  44         flush_icache_range(_addr, _addr + (len));                                               \
  45 } while (0)
  46
  47 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  48 do { memcpy(dst, src, len); \
  49      flush_icache_user_range(vma, page, vaddr, len); \
  50 } while (0)
  51 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  52         memcpy(dst, src, len)
  53
  54 #endif /* _ASM_IA64_CACHEFLUSH_H */