arch/ia64/include/asm/cacheflush.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_IA64_CACHEFLUSH_H
   3 #define _ASM_IA64_CACHEFLUSH_H
   4
   5 /*
   6  * Copyright (C) 2002 Hewlett-Packard Co
   7  *      David Mosberger-Tang <davidm@hpl.hp.com>
   8  */
   9
  10 #include <linux/page-flags.h>
  11 #include <linux/bitops.h>
  12
  13 #include <asm/page.h>
  14
  15 /*
  16  * Cache flushing routines.  This is the kind of stuff that can be very expensive, so try
  17  * to avoid them whenever possible.
  18  */
  19
  20 #define flush_cache_all()                       do { } while (0)
  21 #define flush_cache_mm(mm)                      do { } while (0)
  22 #define flush_cache_dup_mm(mm)                  do { } while (0)
  23 #define flush_cache_range(vma, start, end)      do { } while (0)
  24 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  25 #define flush_icache_page(vma,page)             do { } while (0)
  26 #define flush_cache_vmap(start, end)            do { } while (0)
  27 #define flush_cache_vunmap(start, end)          do { } while (0)
  28
  29 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  30 #define flush_dcache_page(page)                 \
  31 do {                                            \
  32         clear_bit(PG_arch_1, &(page)->flags);   \
  33 } while (0)
  34
  35 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  36 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  37
  38 extern void flush_icache_range (unsigned long start, unsigned long end);
  39 extern void clflush_cache_range(void *addr, int size);
  40
  41
  42 #define flush_icache_user_range(vma, page, user_addr, len)                                      \
  43 do {                                                                                            \
  44         unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK);  \
  45         flush_icache_range(_addr, _addr + (len));                                               \
  46 } while (0)
  47
  48 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  49 do { memcpy(dst, src, len); \
  50      flush_icache_user_range(vma, page, vaddr, len); \
  51 } while (0)
  52 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  53         memcpy(dst, src, len)
  54
  55 #endif /* _ASM_IA64_CACHEFLUSH_H */