LXR linux/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)                 \
  31do {                                            \
  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
  38extern void flush_icache_range (unsigned long start, unsigned long end);
  39extern void clflush_cache_range(void *addr, int size);
  40
  41
  42#define flush_icache_user_range(vma, page, user_addr, len)                                      \
  43do {                                                                                            \
  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) \
  49do { 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 */
  56