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) pr_info("x86/PAT: " 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