release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mn10300/include/asm/cacheflush.h

   1 /* MN10300 Cache flushing
   2  *
   3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11 #ifndef _ASM_CACHEFLUSH_H
  12 #define _ASM_CACHEFLUSH_H
  13
  14 #ifndef __ASSEMBLY__
  15
  16 /* Keep includes the same across arches.  */
  17 #include <linux/mm.h>
  18
  19 /*
  20  * virtually-indexed cache management (our cache is physically indexed)
  21  */
  22 #define flush_cache_all()                       do {} while (0)
  23 #define flush_cache_mm(mm)                      do {} while (0)
  24 #define flush_cache_dup_mm(mm)                  do {} while (0)
  25 #define flush_cache_range(mm, start, end)       do {} while (0)
  26 #define flush_cache_page(vma, vmaddr, pfn)      do {} while (0)
  27 #define flush_cache_vmap(start, end)            do {} while (0)
  28 #define flush_cache_vunmap(start, end)          do {} while (0)
  29 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
  30 #define flush_dcache_page(page)                 do {} while (0)
  31 #define flush_dcache_mmap_lock(mapping)         do {} while (0)
  32 #define flush_dcache_mmap_unlock(mapping)       do {} while (0)
  33
  34 /*
  35  * physically-indexed cache management
  36  */
  37 #ifndef CONFIG_MN10300_CACHE_DISABLED
  38
  39 extern void flush_icache_range(unsigned long start, unsigned long end);
  40 extern void flush_icache_page(struct vm_area_struct *vma, struct page *pg);
  41
  42 #else
  43
  44 #define flush_icache_range(start, end)          do {} while (0)
  45 #define flush_icache_page(vma, pg)              do {} while (0)
  46
  47 #endif
  48
  49 #define flush_icache_user_range(vma, pg, adr, len) \
  50         flush_icache_range(adr, adr + len)
  51
  52 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  53         do {                                    \
  54                 memcpy(dst, src, len);          \
  55                 flush_icache_page(vma, page);   \
  56         } while (0)
  57
  58 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  59         memcpy(dst, src, len)
  60
  61 /*
  62  * primitive routines
  63  */
  64 #ifndef CONFIG_MN10300_CACHE_DISABLED
  65 extern void mn10300_icache_inv(void);
  66 extern void mn10300_dcache_inv(void);
  67 extern void mn10300_dcache_inv_page(unsigned start);
  68 extern void mn10300_dcache_inv_range(unsigned start, unsigned end);
  69 extern void mn10300_dcache_inv_range2(unsigned start, unsigned size);
  70 #ifdef CONFIG_MN10300_CACHE_WBACK
  71 extern void mn10300_dcache_flush(void);
  72 extern void mn10300_dcache_flush_page(unsigned start);
  73 extern void mn10300_dcache_flush_range(unsigned start, unsigned end);
  74 extern void mn10300_dcache_flush_range2(unsigned start, unsigned size);
  75 extern void mn10300_dcache_flush_inv(void);
  76 extern void mn10300_dcache_flush_inv_page(unsigned start);
  77 extern void mn10300_dcache_flush_inv_range(unsigned start, unsigned end);
  78 extern void mn10300_dcache_flush_inv_range2(unsigned start, unsigned size);
  79 #else
  80 #define mn10300_dcache_flush()                          do {} while (0)
  81 #define mn10300_dcache_flush_page(start)                do {} while (0)
  82 #define mn10300_dcache_flush_range(start, end)          do {} while (0)
  83 #define mn10300_dcache_flush_range2(start, size)        do {} while (0)
  84 #define mn10300_dcache_flush_inv()                      mn10300_dcache_inv()
  85 #define mn10300_dcache_flush_inv_page(start) \
  86         mn10300_dcache_inv_page((start))
  87 #define mn10300_dcache_flush_inv_range(start, end) \
  88         mn10300_dcache_inv_range((start), (end))
  89 #define mn10300_dcache_flush_inv_range2(start, size) \
  90         mn10300_dcache_inv_range2((start), (size))
  91 #endif /* CONFIG_MN10300_CACHE_WBACK */
  92 #else
  93 #define mn10300_icache_inv()                            do {} while (0)
  94 #define mn10300_dcache_inv()                            do {} while (0)
  95 #define mn10300_dcache_inv_page(start)                  do {} while (0)
  96 #define mn10300_dcache_inv_range(start, end)            do {} while (0)
  97 #define mn10300_dcache_inv_range2(start, size)          do {} while (0)
  98 #define mn10300_dcache_flush()                          do {} while (0)
  99 #define mn10300_dcache_flush_inv_page(start)            do {} while (0)
 100 #define mn10300_dcache_flush_inv()                      do {} while (0)
 101 #define mn10300_dcache_flush_inv_range(start, end)      do {} while (0)
 102 #define mn10300_dcache_flush_inv_range2(start, size)    do {} while (0)
 103 #define mn10300_dcache_flush_page(start)                do {} while (0)
 104 #define mn10300_dcache_flush_range(start, end)          do {} while (0)
 105 #define mn10300_dcache_flush_range2(start, size)        do {} while (0)
 106 #endif /* CONFIG_MN10300_CACHE_DISABLED */
 107
 108 /*
 109  * internal debugging function
 110  */
 111 #ifdef CONFIG_DEBUG_PAGEALLOC
 112 extern void kernel_map_pages(struct page *page, int numpages, int enable);
 113 #endif
 114
 115 #endif /* __ASSEMBLY__ */
 116
 117 #endif /* _ASM_CACHEFLUSH_H */