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/*

 * structures and definitions for the int 15, ax=e820 memory map

 * scheme.

 *

 * In a nutshell, arch/i386/boot/setup.S populates a scratch table

 * in the empty_zero_block that contains a list of usable address/size

 * duples.   In arch/i386/kernel/setup.c, this information is

 * transferred into the e820map, and in arch/i386/mm/init.c, that

 * new information is used to mark pages reserved or not.

 *

 */

#ifndef __E820_HEADER

#define __E820_HEADER

#define E820MAP 0x2d0           /* our map */

#define E820MAX 32              /* number of entries in E820MAP */

#define E820NR  0x1e8           /* # entries in E820MAP */

#define E820_RAM        1

#define E820_RESERVED   2

#define E820_ACPI       3 /* usable as RAM once ACPI tables have been read */

#define E820_NVS        4

#define HIGH_MEMORY     (1024*1024)

#ifndef __ASSEMBLY__

struct e820map {

    int nr_map;

    struct e820entry {

        unsigned long long addr;        /* start of memory segment */

        unsigned long long size;        /* size of memory segment */

        unsigned long type;             /* type of memory segment */

    } map[E820MAX];

};

extern struct e820map e820;

#endif/*!__ASSEMBLY__*/

#endif/*__E820_HEADER*/