arch/microblaze/include/asm/cacheflush.h

   1 /*
   2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
   3  * Copyright (C) 2007-2009 PetaLogix
   4  * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
   5  * based on v850 version which was
   6  * Copyright (C) 2001,02,03 NEC Electronics Corporation
   7  * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
   8  *
   9  * This file is subject to the terms and conditions of the GNU General
  10  * Public License. See the file COPYING in the main directory of this
  11  * archive for more details.
  12  *
  13  */
  14
  15 #ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
  16 #define _ASM_MICROBLAZE_CACHEFLUSH_H
  17
  18 /* Somebody depends on this; sigh... */
  19 #include <linux/mm.h>
  20
  21 /*
  22  * Cache handling functions.
  23  * Microblaze has a write-through data cache, meaning that the data cache
  24  * never needs to be flushed.  The only flushing operations that are
  25  * implemented are to invalidate the instruction cache.  These are called
  26  * after loading a user application into memory, we must invalidate the
  27  * instruction cache to make sure we don't fetch old, bad code.
  28  */
  29
  30 /* FIXME for LL-temac driver */
  31 #define invalidate_dcache_range(start, end) \
  32                         __invalidate_dcache_range(start, end)
  33
  34 #define flush_cache_all()                       __invalidate_cache_all()
  35 #define flush_cache_mm(mm)                      do { } while (0)
  36 #define flush_cache_range(vma, start, end)      __invalidate_cache_all()
  37 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  38
  39 #define flush_dcache_range(start, end)  __invalidate_dcache_range(start, end)
  40 #define flush_dcache_page(page)                 do { } while (0)
  41 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  42 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  43
  44 #define flush_icache_range(start, len)  __invalidate_icache_range(start, len)
  45 #define flush_icache_page(vma, pg)              do { } while (0)
  46
  47 #ifndef CONFIG_MMU
  48 # define flush_icache_user_range(start, len)    do { } while (0)
  49 #else
  50 # define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
  51
  52 # define flush_page_to_ram(page)                do { } while (0)
  53
  54 # define flush_icache()                 __invalidate_icache_all()
  55 # define flush_cache_sigtramp(vaddr) \
  56                         __invalidate_icache_range(vaddr, vaddr + 8)
  57
  58 # define flush_dcache_mmap_lock(mapping)        do { } while (0)
  59 # define flush_dcache_mmap_unlock(mapping)      do { } while (0)
  60
  61 # define flush_cache_dup_mm(mm)                 do { } while (0)
  62 #endif
  63
  64 #define flush_cache_vmap(start, end)            do { } while (0)
  65 #define flush_cache_vunmap(start, end)          do { } while (0)
  66
  67 struct page;
  68 struct mm_struct;
  69 struct vm_area_struct;
  70
  71 /* see arch/microblaze/kernel/cache.c */
  72 extern void __invalidate_icache_all(void);
  73 extern void __invalidate_icache_range(unsigned long start, unsigned long end);
  74 extern void __invalidate_icache_page(struct vm_area_struct *vma,
  75                                 struct page *page);
  76 extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
  77                                 struct page *page,
  78                                 unsigned long adr, int len);
  79 extern void __invalidate_cache_sigtramp(unsigned long addr);
  80
  81 extern void __invalidate_dcache_all(void);
  82 extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
  83 extern void __invalidate_dcache_page(struct vm_area_struct *vma,
  84                                 struct page *page);
  85 extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
  86                                 struct page *page,
  87                                 unsigned long adr, int len);
  88
  89 extern inline void __invalidate_cache_all(void)
  90 {
  91         __invalidate_icache_all();
  92         __invalidate_dcache_all();
  93 }
  94
  95 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  96 do { memcpy((dst), (src), (len)); \
  97         flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
  98 } while (0)
  99
 100 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 101         memcpy((dst), (src), (len))
 102
 103 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */