| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __PAT_INTERNAL_H_ |
| 3 | #define __PAT_INTERNAL_H_ |
| 4 | |
| 5 | extern int pat_debug_enable; |
| 6 | |
| 7 | #define dprintk(fmt, arg...) \ |
| 8 | do { if (pat_debug_enable) pr_info("x86/PAT: " fmt, ##arg); } while (0) |
| 9 | |
| 10 | struct memtype { |
| 11 | u64 start; |
| 12 | u64 end; |
| 13 | u64 subtree_max_end; |
| 14 | enum page_cache_mode type; |
| 15 | struct rb_node rb; |
| 16 | }; |
| 17 | |
| 18 | static inline char *cattr_name(enum page_cache_mode pcm) |
| 19 | { |
| 20 | switch (pcm) { |
| 21 | case _PAGE_CACHE_MODE_UC: return "uncached"; |
| 22 | case _PAGE_CACHE_MODE_UC_MINUS: return "uncached-minus"; |
| 23 | case _PAGE_CACHE_MODE_WB: return "write-back"; |
| 24 | case _PAGE_CACHE_MODE_WC: return "write-combining"; |
| 25 | case _PAGE_CACHE_MODE_WT: return "write-through"; |
| 26 | case _PAGE_CACHE_MODE_WP: return "write-protected"; |
| 27 | default: return "broken"; |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | #ifdef CONFIG_X86_PAT |
| 32 | extern int rbt_memtype_check_insert(struct memtype *new, |
| 33 | enum page_cache_mode *new_type); |
| 34 | extern struct memtype *rbt_memtype_erase(u64 start, u64 end); |
| 35 | extern struct memtype *rbt_memtype_lookup(u64 addr); |
| 36 | extern int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos); |
| 37 | #else |
| 38 | static inline int rbt_memtype_check_insert(struct memtype *new, |
| 39 | enum page_cache_mode *new_type) |
| 40 | { return 0; } |
| 41 | static inline struct memtype *rbt_memtype_erase(u64 start, u64 end) |
| 42 | { return NULL; } |
| 43 | static inline struct memtype *rbt_memtype_lookup(u64 addr) |
| 44 | { return NULL; } |
| 45 | static inline int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos) |
| 46 | { return 0; } |
| 47 | #endif |
| 48 | |
| 49 | #endif /* __PAT_INTERNAL_H_ */ |