#ifndef _ASM_X86_E820_H
#define _ASM_X86_E820_H
#define E820MAP        0x2d0                /* our map */
#define E820MAX        128                /* number of entries in E820MAP */

/*
 * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
 * constrained space in the zeropage.  If we have more nodes than
 * that, and if we've booted off EFI firmware, then the EFI tables
 * passed us from the EFI firmware can list more nodes.  Size our
 * internal memory map tables to have room for these additional
 * nodes, based on up to three entries per node for which the
 * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
 * plus E820MAX, allowing space for the possible duplicate E820
 * entries that might need room in the same arrays, prior to the
 * call to sanitize_e820_map() to remove duplicates.  The allowance
 * of three memory map entries per node is "enough" entries for
 * the initial hardware platform motivating this mechanism to make
 * use of additional EFI map entries.  Future platforms may want
 * to allow more than three entries per node or otherwise refine
 * this size.
 */

/*
 * Odd: 'make headers_check' complains about numa.h if I try
 * to collapse the next two #ifdef lines to a single line:
 *        #if defined(__KERNEL__) && defined(CONFIG_EFI)
 */
#define E820_X_MAX E820MAX

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

#define E820_RAM        1
#define E820_RESERVED        2
#define E820_ACPI        3
#define E820_NVS        4
#define E820_UNUSABLE        5

/* reserved RAM used by kernel itself */
#define E820_RESERVED_KERN        128

#ifndef __ASSEMBLY__
#include <linux/types.h>
struct e820entry {
        __u64 addr;        /* start of memory segment */
        __u64 size;        /* size of memory segment */
        __u32 type;        /* type of memory segment */
} __attribute__((packed));

struct e820map {
        __u32 nr_map;
        struct e820entry map[E820_X_MAX];
};

#endif /* __ASSEMBLY__ */

#define ISA_START_ADDRESS        0xa0000
#define ISA_END_ADDRESS                0x100000
#define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS)

#define BIOS_BEGIN                0x000a0000
#define BIOS_END                0x00100000


#endif /* _ASM_X86_E820_H */