release/src-rt/linux/linux-2.6/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
  48 struct page;
  49 struct mm_struct;
  50 struct vm_area_struct;
  51
  52 /* Otherwise, somebody had better define them.  */
  53 extern void flush_icache (void);
  54 extern void flush_icache_range (unsigned long start, unsigned long end);
  55 extern void flush_icache_page (struct vm_area_struct *vma, struct page *page);
  56 extern void flush_icache_user_range (struct vm_area_struct *vma,
  57                                      struct page *page,
  58                                      unsigned long adr, int len);
  59 extern 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) \
  64 do { 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__ */