50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PAT_INTERNAL_H_
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#define __PAT_INTERNAL_H_
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extern int pat_debug_enable;
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#define dprintk(fmt, arg...) \
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do { if (pat_debug_enable) pr_info("x86/PAT: " fmt, ##arg); } while (0)
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struct memtype {
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u64 start;
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u64 end;
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u64 subtree_max_end;
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enum page_cache_mode type;
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struct rb_node rb;
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};
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static inline char *cattr_name(enum page_cache_mode pcm)
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{
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switch (pcm) {
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case _PAGE_CACHE_MODE_UC: return "uncached";
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case _PAGE_CACHE_MODE_UC_MINUS: return "uncached-minus";
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case _PAGE_CACHE_MODE_WB: return "write-back";
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case _PAGE_CACHE_MODE_WC: return "write-combining";
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case _PAGE_CACHE_MODE_WT: return "write-through";
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case _PAGE_CACHE_MODE_WP: return "write-protected";
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default: return "broken";
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}
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}
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#ifdef CONFIG_X86_PAT
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extern int memtype_check_insert(struct memtype *new,
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enum page_cache_mode *new_type);
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extern struct memtype *memtype_erase(u64 start, u64 end);
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extern struct memtype *memtype_lookup(u64 addr);
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extern int memtype_copy_nth_element(struct memtype *out, loff_t pos);
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#else
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static inline int memtype_check_insert(struct memtype *new,
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enum page_cache_mode *new_type)
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{ return 0; }
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static inline struct memtype *memtype_erase(u64 start, u64 end)
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{ return NULL; }
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static inline struct memtype *memtype_lookup(u64 addr)
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{ return NULL; }
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static inline int memtype_copy_nth_element(struct memtype *out, loff_t pos)
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{ return 0; }
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#endif
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#endif /* __PAT_INTERNAL_H_ */
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