LXR linux/include/asm-v850/cacheflush.h

   1/*
   2 * include/asm-v850/cacheflush.h
   3 *
   4 *  Copyright (C) 2001,02,03  NEC Electronics Corporation
   5 *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
   6 *
   7 * This file is subject to the terms and conditions of the GNU General
   8 * Public License.  See the file COPYING in the main directory of this
   9 * archive for more details.
  10 *
  11 * Written by Miles Bader <miles@gnu.org>
  12 */
  13
  14#ifndef __V850_CACHEFLUSH_H__
  15#define __V850_CACHEFLUSH_H__
  16
  17/* Somebody depends on this; sigh...  */
  18#include <linux/mm.h>
  19
  20#include <asm/machdep.h>
  21
  22
  23/* The following are all used by the kernel in ways that only affect
  24   systems with MMUs, so we don't need them.  */
  25#define flush_cache_all()                       ((void)0)
  26#define flush_cache_mm(mm)                      ((void)0)
  27#define flush_cache_dup_mm(mm)                  ((void)0)
  28#define flush_cache_range(vma, start, end)      ((void)0)
  29#define flush_cache_page(vma, vmaddr, pfn)      ((void)0)
  30#define flush_dcache_page(page)                 ((void)0)
  31#define flush_dcache_mmap_lock(mapping)         ((void)0)
  32#define flush_dcache_mmap_unlock(mapping)       ((void)0)
  33#define flush_cache_vmap(start, end)            ((void)0)
  34#define flush_cache_vunmap(start, end)          ((void)0)
  35
  36#ifdef CONFIG_NO_CACHE
  37
  38/* Some systems have no cache at all, in which case we don't need these
  39   either.  */
  40#define flush_icache()                          ((void)0)
  41#define flush_icache_range(start, end)          ((void)0)
  42#define flush_icache_page(vma,pg)               ((void)0)
  43#define flush_icache_user_range(vma,pg,adr,len) ((void)0)
  44#define flush_cache_sigtramp(vaddr)             ((void)0)
  45
  46#else /* !CONFIG_NO_CACHE */
  47
  48struct page;
  49struct mm_struct;
  50struct vm_area_struct;
  51
  52/* Otherwise, somebody had better define them.  */
  53extern void flush_icache (void);
  54extern void flush_icache_range (unsigned long start, unsigned long end);
  55extern void flush_icache_page (struct vm_area_struct *vma, struct page *page);
  56extern void flush_icache_user_range (struct vm_area_struct *vma,
  57                                     struct page *page,
  58                                     unsigned long adr, int len);
  59extern void flush_cache_sigtramp (unsigned long addr);
  60
  61#endif /* CONFIG_NO_CACHE */
  62
  63#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  64do { memcpy(dst, src, len); \
  65     flush_icache_user_range(vma, page, vaddr, len); \
  66} while (0)
  67#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  68        memcpy(dst, src, len)
  69
  70#endif /* __V850_CACHEFLUSH_H__ */
  71