#ifndef _PAGEMAP_H
#define _PAGEMAP_H

#include "utils.h"
#include "list.h"
#include "bintree.h"

#define PAGE_SHIFT	12
#define PAGE_SIZE	(1 << PAGE_SHIFT)

struct maps;

struct maps_list {
	struct maps *map;
	struct list_head list;
};
#define list_to_maps_list(list_head)				\
	container_of((list_head), struct maps_list, list)

#define BITRANGE(first, last) (((2ll << (last - first)) - 1) << first)

struct pageframe {
	struct bintree tree;
	struct maps_list ml;	/* List to mappings which point to this pfn */

	unsigned long long pf;	/* page frame entry from /proc/pid/pagemap */

	int refcount;
};

#define tree_to_pageframe(tree_struct)				\
	container_of((tree_struct), struct pageframe, tree)

static inline int page_present(struct pageframe *p)
{
	return !!(BITRANGE(63, 63) & p->pf);
}

static inline int page_swapped(struct pageframe *p)
{
	return !!(BITRANGE(62, 62) & p->pf);
}

static inline int page_shift(struct pageframe *p)
{
	return (BITRANGE(55, 60) & p->pf) >> 55;
}

static inline long int pfn(struct pageframe *p)
{
	return (BITRANGE(0, 54) & p->pf);
}

static inline int swap_type(struct pageframe *p)
{
	return (BITRANGE(0, 4) & p->pf);
}

static inline int swap_offset(struct pageframe *p)
{
	return (BITRANGE(5, 54) & p->pf) >> 5;
}

struct maps {
	struct list_head list;

	/* Memory segment of a mapping */
	unsigned long start;
	unsigned long end;
	unsigned long size;

	long int pages_present;
	long int pages_swapped;

	/* Name of the mapping, such as library name or something else */
	char name[128];
	int pid; /* Process which address space the mapping belongs to */
	int tid; /* thread id */
};

#define list_to_maps(list_head)				\
	container_of((list_head), struct maps, list)

struct process {
	struct maps *maps;
	struct list_head list;
	int pid;
	int tid;
	char name[256];

	long int pages_present;
	long int pages_swapped;

	int is_initial_pid;
};

#define PARSE_PID		0x1
#define PARSE_MAP_NAME		0x2
#define PARSE_PROCESS_NAME	0x4
#define PARSE_DUMP		0x8
#define PARSE_NOADD_TREE	0x10

struct parse_opts {
	int parse_mask;
	int pid;
	char *name;
	int with_threads;
};

#define is_parse_option(parse_opts, flag) \
	(!!((parse_opts)->parse_mask & (flag)))

#endif