LXR linux/arch/x86/mm/pat

   1#ifndef __PAT_INTERNAL_H_
   2#define __PAT_INTERNAL_H_
   3
   4extern int pat_debug_enable;
   5
   6#define dprintk(fmt, arg...) \
   7        do { if (pat_debug_enable) printk(KERN_INFO fmt, ##arg); } while (0)
   8
   9struct memtype {
  10        u64                     start;
  11        u64                     end;
  12        u64                     subtree_max_end;
  13        enum page_cache_mode    type;
  14        struct rb_node          rb;
  15};
  16
  17static inline char *cattr_name(enum page_cache_mode pcm)
  18{
  19        switch (pcm) {
  20        case _PAGE_CACHE_MODE_UC:               return "uncached";
  21        case _PAGE_CACHE_MODE_UC_MINUS:         return "uncached-minus";
  22        case _PAGE_CACHE_MODE_WB:               return "write-back";
  23        case _PAGE_CACHE_MODE_WC:               return "write-combining";
  24        case _PAGE_CACHE_MODE_WT:               return "write-through";
  25        case _PAGE_CACHE_MODE_WP:               return "write-protected";
  26        default:                                return "broken";
  27        }
  28}
  29
  30#ifdef CONFIG_X86_PAT
  31extern int rbt_memtype_check_insert(struct memtype *new,
  32                                        enum page_cache_mode *new_type);
  33extern struct memtype *rbt_memtype_erase(u64 start, u64 end);
  34extern struct memtype *rbt_memtype_lookup(u64 addr);
  35extern int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos);
  36#else
  37static inline int rbt_memtype_check_insert(struct memtype *new,
  38                                        enum page_cache_mode *new_type)
  39{ return 0; }
  40static inline struct memtype *rbt_memtype_erase(u64 start, u64 end)
  41{ return NULL; }
  42static inline struct memtype *rbt_memtype_lookup(u64 addr)
  43{ return NULL; }
  44static inline int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos)
  45{ return 0; }
  46#endif
  47
  48#endif /* __PAT_INTERNAL_H_ */
  49