include/asm-ppc/cacheflush.h

   1 /*
   2  * include/asm-ppc/cacheflush.h
   3  *
   4  *  This program is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU General Public License
   6  *  as published by the Free Software Foundation; either version
   7  *  2 of the License, or (at your option) any later version.
   8  */
   9 #ifdef __KERNEL__
  10 #ifndef _PPC_CACHEFLUSH_H
  11 #define _PPC_CACHEFLUSH_H
  12
  13 #include <linux/mm.h>
  14
  15 /*
  16  * No cache flushing is required when address mappings are
  17  * changed, because the caches on PowerPCs are physically
  18  * addressed.  -- paulus
  19  * Also, when SMP we use the coherency (M) bit of the
  20  * BATs and PTEs.  -- Cort
  21  */
  22 #define flush_cache_all()               do { } while (0)
  23 #define flush_cache_mm(mm)              do { } while (0)
  24 #define flush_cache_range(vma, a, b)    do { } while (0)
  25 #define flush_cache_page(vma, p, pfn)   do { } while (0)
  26 #define flush_icache_page(vma, page)    do { } while (0)
  27 #define flush_cache_vmap(start, end)    do { } while (0)
  28 #define flush_cache_vunmap(start, end)  do { } while (0)
  29
  30 extern void flush_dcache_page(struct page *page);
  31 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  32 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  33
  34 extern void flush_icache_range(unsigned long, unsigned long);
  35 extern void flush_icache_user_range(struct vm_area_struct *vma,
  36                 struct page *page, unsigned long addr, int len);
  37
  38 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  39 do { memcpy(dst, src, len); \
  40      flush_icache_user_range(vma, page, vaddr, len); \
  41 } while (0)
  42 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  43         memcpy(dst, src, len)
  44
  45 extern void __flush_dcache_icache(void *page_va);
  46 extern void __flush_dcache_icache_phys(unsigned long physaddr);
  47 extern void flush_dcache_icache_page(struct page *page);
  48 #endif /* _PPC_CACHEFLUSH_H */
  49 #endif /* __KERNEL__ */