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

   1 /*
   2  *  This program is free software; you can redistribute it and/or
   3  *  modify it under the terms of the GNU General Public License
   4  *  as published by the Free Software Foundation; either version
   5  *  2 of the License, or (at your option) any later version.
   6  */
   7 #ifndef _ASM_POWERPC_CACHEFLUSH_H
   8 #define _ASM_POWERPC_CACHEFLUSH_H
   9
  10 #ifdef __KERNEL__
  11
  12 #include <linux/mm.h>
  13 #include <asm/cputable.h>
  14
  15 /*
  16  * No cache flushing is required when address mappings are changed,
  17  * because the caches on PowerPCs are physically addressed.
  18  */
  19 #define flush_cache_all()                       do { } while (0)
  20 #define flush_cache_mm(mm)                      do { } while (0)
  21 #define flush_cache_dup_mm(mm)                  do { } while (0)
  22 #define flush_cache_range(vma, start, end)      do { } while (0)
  23 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  24 #define flush_icache_page(vma, page)            do { } while (0)
  25 #define flush_cache_vmap(start, end)            do { } while (0)
  26 #define flush_cache_vunmap(start, end)          do { } while (0)
  27
  28 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  29 extern void flush_dcache_page(struct page *page);
  30 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  31 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  32
  33 extern void __flush_icache_range(unsigned long, unsigned long);
  34 static inline void flush_icache_range(unsigned long start, unsigned long stop)
  35 {
  36         if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
  37                 __flush_icache_range(start, stop);
  38 }
  39
  40 extern void flush_icache_user_range(struct vm_area_struct *vma,
  41                                     struct page *page, unsigned long addr,
  42                                     int len);
  43 extern void __flush_dcache_icache(void *page_va);
  44 extern void flush_dcache_icache_page(struct page *page);
  45 #if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
  46 extern void __flush_dcache_icache_phys(unsigned long physaddr);
  47 #endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
  48
  49 extern void flush_dcache_range(unsigned long start, unsigned long stop);
  50 #ifdef CONFIG_PPC32
  51 extern void clean_dcache_range(unsigned long start, unsigned long stop);
  52 extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
  53 #endif /* CONFIG_PPC32 */
  54 #ifdef CONFIG_PPC64
  55 extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
  56 extern void flush_dcache_phys_range(unsigned long start, unsigned long stop);
  57 #endif
  58
  59 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  60         do { \
  61                 memcpy(dst, src, len); \
  62                 flush_icache_user_range(vma, page, vaddr, len); \
  63         } while (0)
  64 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  65         memcpy(dst, src, len)
  66
  67
  68
  69 #ifdef CONFIG_DEBUG_PAGEALLOC
  70 /* internal debugging function */
  71 void kernel_map_pages(struct page *page, int numpages, int enable);
  72 #endif
  73
  74 #endif /* __KERNEL__ */
  75
  76 #endif /* _ASM_POWERPC_CACHEFLUSH_H */