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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/x86/mm/pat_internal.h
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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) printk(KERN_INFO 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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	unsigned long		type;

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	struct rb_node		rb;

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};

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static inline char *cattr_name(unsigned long flags)

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{

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	switch (flags & _PAGE_CACHE_MASK) {

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	case _PAGE_CACHE_UC:		return "uncached";

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	case _PAGE_CACHE_UC_MINUS:	return "uncached-minus";

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	case _PAGE_CACHE_WB:		return "write-back";

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	case _PAGE_CACHE_WC:		return "write-combining";

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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 rbt_memtype_check_insert(struct memtype *new,

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					unsigned long *new_type);

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extern struct memtype *rbt_memtype_erase(u64 start, u64 end);

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extern struct memtype *rbt_memtype_lookup(u64 addr);

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extern int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos);

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#else

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static inline int rbt_memtype_check_insert(struct memtype *new,

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					unsigned long *new_type)

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{ return 0; }

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static inline struct memtype *rbt_memtype_erase(u64 start, u64 end)

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{ return NULL; }

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static inline struct memtype *rbt_memtype_lookup(u64 addr)

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{ return NULL; }

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static inline int rbt_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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