pat_internal.h

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#ifndef __PAT_INTERNAL_H_
#define __PAT_INTERNAL_H_

extern int pat_debug_enable;

#define dprintk(fmt, arg...) \
    do { if (pat_debug_enable) printk(KERN_INFO fmt, ##arg); } while (0)

struct memtype {
    u64         start;
    u64         end;
    u64         subtree_max_end;
    unsigned long       type;
    struct rb_node      rb;
};

static inline char *cattr_name(unsigned long flags)
{
    switch (flags & _PAGE_CACHE_MASK) {
    case _PAGE_CACHE_UC:        return "uncached";
    case _PAGE_CACHE_UC_MINUS:  return "uncached-minus";
    case _PAGE_CACHE_WB:        return "write-back";
    case _PAGE_CACHE_WC:        return "write-combining";
    default:            return "broken";
    }
}

#ifdef CONFIG_X86_PAT
extern int rbt_memtype_check_insert(struct memtype *new,
                    unsigned long *new_type);
extern struct memtype *rbt_memtype_erase(u64 start, u64 end);
extern struct memtype *rbt_memtype_lookup(u64 addr);
extern int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos);
#else
static inline int rbt_memtype_check_insert(struct memtype *new,
                    unsigned long *new_type)
{ return 0; }
static inline struct memtype *rbt_memtype_erase(u64 start, u64 end)
{ return NULL; }
static inline struct memtype *rbt_memtype_lookup(u64 addr)
{ return NULL; }
static inline int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos)
{ return 0; }
#endif

#endif /* __PAT_INTERNAL_H_ */