arch/x86/mm/pat_internal.h

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