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- #ifndef __ASM_E820_H
- #define __ASM_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
-
- /* reserved RAM used by kernel itself */
- #define E820_RESERVED_KERN 128
-
- #ifndef __ASSEMBLY__
- 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_E820_H */
-