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 ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
  41 #define flush_dcache_page(page)                 do { } while (0)
  42 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  43 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  44
  45 #define flush_icache_range(start, len)  __invalidate_icache_range(start, len)
  46 #define flush_icache_page(vma, pg)              do { } while (0)
  47
  48 #ifndef CONFIG_MMU
  49 # define flush_icache_user_range(start, len)    do { } while (0)
  50 #else
  51 # define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
  52
  53 # define flush_page_to_ram(page)                do { } while (0)
  54
  55 # define flush_icache()                 __invalidate_icache_all()
  56 # define flush_cache_sigtramp(vaddr) \
  57                         __invalidate_icache_range(vaddr, vaddr + 8)
  58
  59 # define flush_dcache_mmap_lock(mapping)        do { } while (0)
  60 # define flush_dcache_mmap_unlock(mapping)      do { } while (0)
  61
  62 # define flush_cache_dup_mm(mm)                 do { } while (0)
  63 #endif
  64
  65 #define flush_cache_vmap(start, end)            do { } while (0)
  66 #define flush_cache_vunmap(start, end)          do { } while (0)
  67
  68 struct page;
  69 struct mm_struct;
  70 struct vm_area_struct;
  71
  72 /* see arch/microblaze/kernel/cache.c */
  73 extern void __invalidate_icache_all(void);
  74 extern void __invalidate_icache_range(unsigned long start, unsigned long end);
  75 extern void __invalidate_icache_page(struct vm_area_struct *vma,
  76                                 struct page *page);
  77 extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
  78                                 struct page *page,
  79                                 unsigned long adr, int len);
  80 extern void __invalidate_cache_sigtramp(unsigned long addr);
  81
  82 extern void __invalidate_dcache_all(void);
  83 extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
  84 extern void __invalidate_dcache_page(struct vm_area_struct *vma,
  85                                 struct page *page);
  86 extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
  87                                 struct page *page,
  88                                 unsigned long adr, int len);
  89
  90 extern inline void __invalidate_cache_all(void)
  91 {
  92         __invalidate_icache_all();
  93         __invalidate_dcache_all();
  94 }
  95
  96 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  97 do { memcpy((dst), (src), (len)); \
  98         flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
  99 } while (0)
 100
 101 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 102         memcpy((dst), (src), (len))
 103
 104 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */