#ifndef _PAGEMAP_H_
#define _PAGEMAP_H_

#define KPF_BYTES		8
#define PROC_KPAGEFLAGS		"/proc/kpageflags"

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

/* copied from kpageflags_read() */

#define KPF_LOCKED              0
#define KPF_ERROR               1
#define KPF_REFERENCED          2
#define KPF_UPTODATE            3
#define KPF_DIRTY               4
#define KPF_LRU                 5
#define KPF_ACTIVE              6
#define KPF_SLAB                7
#define KPF_WRITEBACK           8
#define KPF_RECLAIM             9
#define KPF_BUDDY               10

/* new additions in 2.6.31 */
#define KPF_MMAP                11
#define KPF_ANON                12
#define KPF_SWAPCACHE           13
#define KPF_SWAPBACKED          14
#define KPF_COMPOUND_HEAD       15
#define KPF_COMPOUND_TAIL       16
#define KPF_UNEVICTABLE         17
#define KPF_POISON              18
#define KPF_NOPAGE              19

/* kernel hacking assistances */
#define KPF_RESERVED            32
#define KPF_MLOCKED             33
#define KPF_MAPPEDTODISK        34
#define KPF_PRIVATE             35
#define KPF_PRIVATE2            36
#define KPF_OWNER_PRIVATE       37
#define KPF_ARCH                38
#define KPF_UNCACHED            39

static char *page_flag_names[] = {
	[KPF_LOCKED]		= "L:locked",
	[KPF_ERROR]		= "E:error",
	[KPF_REFERENCED]	= "R:referenced",
	[KPF_UPTODATE]		= "U:uptodate",
	[KPF_DIRTY]		= "D:dirty",
	[KPF_LRU]		= "l:lru",
	[KPF_ACTIVE]		= "A:active",
	[KPF_SLAB]		= "S:slab",
	[KPF_WRITEBACK]		= "W:writeback",
	[KPF_RECLAIM]		= "I:reclaim",
	[KPF_BUDDY]		= "B:buddy",

	[KPF_MMAP]		= "M:mmap",
	[KPF_ANON]		= "a:anonymous",
	[KPF_SWAPCACHE]		= "s:swapcache",
	[KPF_SWAPBACKED]	= "b:swapbacked",
	[KPF_COMPOUND_HEAD]	= "H:compound_head",
	[KPF_COMPOUND_TAIL]	= "T:compound_tail",
	[KPF_UNEVICTABLE]	= "u:unevictable",
	[KPF_POISON]		= "X:poison",
	[KPF_NOPAGE]		= "n:nopage",

	[KPF_RESERVED]		= "r:reserved",
	[KPF_MLOCKED]		= "m:mlocked",
	[KPF_MAPPEDTODISK]	= "d:mappedtodisk",
	[KPF_PRIVATE]		= "P:private",
	[KPF_PRIVATE2]		= "p:private_2",
	[KPF_OWNER_PRIVATE]	= "O:owner_private",
	[KPF_ARCH]		= "h:arch",
	[KPF_UNCACHED]		= "c:uncached",
};


static inline unsigned long pages2kb(unsigned long pages)
{
	return (pages * getpagesize()) >> 10;
}

static inline unsigned long pages2mb(unsigned long pages)
{
	return (pages * getpagesize()) >> 20;
}

#endif /* _PAGEMAP_H_ */