LXR linux/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)                 \
  30do {                                            \
  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
  37extern void flush_icache_range (unsigned long start, unsigned long end);
  38extern void clflush_cache_range(void *addr, int size);
  39
  40
  41#define flush_icache_user_range(vma, page, user_addr, len)                                      \
  42do {                                                                                            \
  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) \
  48do { 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 */
  55