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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * structures and definitions for the int 15, ax=e820 memory map |
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| 3 | * scheme. |
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| 4 | * |
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| 5 | * In a nutshell, arch/i386/boot/setup.S populates a scratch table |
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| 6 | * in the empty_zero_block that contains a list of usable address/size |
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| 7 | * duples. In arch/i386/kernel/setup.c, this information is |
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| 8 | * transferred into the e820map, and in arch/i386/mm/init.c, that |
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| 9 | * new information is used to mark pages reserved or not. |
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| 10 | * |
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| 11 | */ |
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| 12 | #ifndef __E820_HEADER |
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| 13 | #define __E820_HEADER |
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| 14 | |||
| 15 | #define E820MAP 0x2d0 /* our map */ |
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| 16 | #define E820MAX 32 /* number of entries in E820MAP */ |
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| 17 | #define E820NR 0x1e8 /* # entries in E820MAP */ |
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| 18 | |||
| 19 | #define E820_RAM 1 |
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| 20 | #define E820_RESERVED 2 |
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| 21 | #define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */ |
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| 22 | #define E820_NVS 4 |
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| 23 | |||
| 24 | #define HIGH_MEMORY (1024*1024) |
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| 25 | |||
| 26 | #ifndef __ASSEMBLY__ |
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| 27 | |||
| 28 | struct e820map { |
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| 29 | int nr_map; |
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| 30 | struct e820entry { |
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| 31 | unsigned long long addr; /* start of memory segment */ |
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| 32 | unsigned long long size; /* size of memory segment */ |
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| 33 | unsigned long type; /* type of memory segment */ |
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| 34 | } map[E820MAX]; |
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| 35 | }; |
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| 36 | |||
| 37 | extern struct e820map e820; |
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| 38 | #endif/*!__ASSEMBLY__*/ |
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| 39 | |||
| 40 | #endif/*__E820_HEADER*/ |