#ifndef __E820_HEADER

#define __E820_HEADER

/*

 * PC BIOS standard E820 types and structure.

 */

#define E820_RAM          1

#define E820_RESERVED     2

#define E820_ACPI         3

#define E820_NVS          4

#define E820_UNUSABLE     5

struct __packed e820entry {

    uint64_t addr;

    uint64_t size;

    uint32_t type;

};

#define E820MAX 1024

struct e820map {

    unsigned int nr_map;

    struct e820entry map[E820MAX];

};

extern int e820_all_mapped(u64 start, u64 end, unsigned type);

extern int reserve_e820_ram(struct e820map *e820, uint64_t s, uint64_t e);

extern int e820_change_range_type(

    struct e820map *e820, uint64_t s, uint64_t e,

    uint32_t orig_type, uint32_t new_type);

extern int e820_add_range(

    struct e820map *, uint64_t s, uint64_t e, uint32_t type);

extern unsigned long init_e820(const char *, struct e820map *);

extern struct e820map e820;

extern struct e820map e820_raw;

/* These symbols live in the boot trampoline. */

extern unsigned int lowmem_kb, highmem_kb;

unsigned int e820map_copy(struct e820entry *map, unsigned int limit);

#define copy_bios_e820 bootsym(e820map_copy)

#endif /*__E820_HEADER*/