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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PAT_INTERNAL_H_
#define __PAT_INTERNAL_H_
extern int pat_debug_enable;
#define dprintk(fmt, arg...) \
do { if (pat_debug_enable) pr_info("x86/PAT: " fmt, ##arg); } while (0)
struct memtype {
u64 start;
u64 end;
u64 subtree_max_end;
enum page_cache_mode type;
struct rb_node rb;
};
static inline char *cattr_name(enum page_cache_mode pcm)
{
switch (pcm) {
case _PAGE_CACHE_MODE_UC: return "uncached";
case _PAGE_CACHE_MODE_UC_MINUS: return "uncached-minus";
case _PAGE_CACHE_MODE_WB: return "write-back";
case _PAGE_CACHE_MODE_WC: return "write-combining";
case _PAGE_CACHE_MODE_WT: return "write-through";
case _PAGE_CACHE_MODE_WP: return "write-protected";
default: return "broken";
}
}
#ifdef CONFIG_X86_PAT
extern int rbt_memtype_check_insert(struct memtype *new,
enum page_cache_mode *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,
enum page_cache_mode *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_ */
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