arch/microblaze/include/asm/cacheflush.h

   1 /*
   2  * Copyright (C) 2007 PetaLogix
   3  * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
   4  * based on v850 version which was
   5  * Copyright (C) 2001,02,03 NEC Electronics Corporation
   6  * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
   7  *
   8  * This file is subject to the terms and conditions of the GNU General
   9  * Public License. See the file COPYING in the main directory of this
  10  * archive for more details.
  11  *
  12  */
  13
  14 #ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
  15 #define _ASM_MICROBLAZE_CACHEFLUSH_H
  16
  17 /* Somebody depends on this; sigh... */
  18 #include <linux/mm.h>
  19
  20 /*
  21  * Cache handling functions.
  22  * Microblaze has a write-through data cache, meaning that the data cache
  23  * never needs to be flushed.  The only flushing operations that are
  24  * implemented are to invalidate the instruction cache.  These are called
  25  * after loading a user application into memory, we must invalidate the
  26  * instruction cache to make sure we don't fetch old, bad code.
  27  */
  28
  29 /* FIXME for LL-temac driver */
  30 #define invalidate_dcache_range(start, end) \
  31                         __invalidate_dcache_range(start, end)
  32
  33 #define flush_cache_all()                       __invalidate_cache_all()
  34 #define flush_cache_mm(mm)                      do { } while (0)
  35 #define flush_cache_range(vma, start, end)      __invalidate_cache_all()
  36 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  37
  38 #define flush_dcache_range(start, end)  __invalidate_dcache_range(start, end)
  39 #define flush_dcache_page(page)                 do { } while (0)
  40 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  41 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  42
  43 #define flush_icache_range(start, len)  __invalidate_icache_range(start, len)
  44 #define flush_icache_page(vma, pg)              do { } while (0)
  45
  46 #define flush_cache_vmap(start, end)            do { } while (0)
  47 #define flush_cache_vunmap(start, end)          do { } while (0)
  48
  49 struct page;
  50 struct mm_struct;
  51 struct vm_area_struct;
  52
  53 /* see arch/microblaze/kernel/cache.c */
  54 extern void __invalidate_icache_all(void);
  55 extern void __invalidate_icache_range(unsigned long start, unsigned long end);
  56 extern void __invalidate_icache_page(struct vm_area_struct *vma,
  57                                 struct page *page);
  58 extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
  59                                 struct page *page,
  60                                 unsigned long adr, int len);
  61 extern void __invalidate_cache_sigtramp(unsigned long addr);
  62
  63 extern void __invalidate_dcache_all(void);
  64 extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
  65 extern void __invalidate_dcache_page(struct vm_area_struct *vma,
  66                                 struct page *page);
  67 extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
  68                                 struct page *page,
  69                                 unsigned long adr, int len);
  70
  71 extern inline void __invalidate_cache_all(void)
  72 {
  73         __invalidate_icache_all();
  74         __invalidate_dcache_all();
  75 }
  76
  77 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  78 do { memcpy((dst), (src), (len)); \
  79         flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
  80 } while (0)
  81
  82 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  83         memcpy((dst), (src), (len))
  84
  85 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */