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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef _UAPI_ASM_X86_E820_H |
| 2 | #define _UAPI_ASM_X86_E820_H |
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| 3 | #define E820MAP 0x2d0 /* our map */ |
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| 4 | #define E820MAX 128 /* number of entries in E820MAP */ |
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| 5 | |||
| 6 | /* |
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| 7 | * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the |
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| 8 | * constrained space in the zeropage. If we have more nodes than |
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| 9 | * that, and if we've booted off EFI firmware, then the EFI tables |
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| 10 | * passed us from the EFI firmware can list more nodes. Size our |
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| 11 | * internal memory map tables to have room for these additional |
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| 12 | * nodes, based on up to three entries per node for which the |
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| 13 | * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT), |
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| 14 | * plus E820MAX, allowing space for the possible duplicate E820 |
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| 15 | * entries that might need room in the same arrays, prior to the |
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| 16 | * call to sanitize_e820_map() to remove duplicates. The allowance |
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| 17 | * of three memory map entries per node is "enough" entries for |
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| 18 | * the initial hardware platform motivating this mechanism to make |
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| 19 | * use of additional EFI map entries. Future platforms may want |
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| 20 | * to allow more than three entries per node or otherwise refine |
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| 21 | * this size. |
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| 22 | */ |
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| 23 | |||
| 24 | #ifndef __KERNEL__ |
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| 25 | #define E820_X_MAX E820MAX |
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| 26 | #endif |
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| 27 | |||
| 28 | #define E820NR 0x1e8 /* # entries in E820MAP */ |
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| 29 | |||
| 30 | #define E820_RAM 1 |
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| 31 | #define E820_RESERVED 2 |
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| 32 | #define E820_ACPI 3 |
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| 33 | #define E820_NVS 4 |
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| 34 | #define E820_UNUSABLE 5 |
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| 35 | |||
| 36 | |||
| 37 | /* |
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| 38 | * reserved RAM used by kernel itself |
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| 39 | * if CONFIG_INTEL_TXT is enabled, memory of this type will be |
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| 40 | * included in the S3 integrity calculation and so should not include |
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| 41 | * any memory that BIOS might alter over the S3 transition |
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| 42 | */ |
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| 43 | #define E820_RESERVED_KERN 128 |
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| 44 | |||
| 45 | #ifndef __ASSEMBLY__ |
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| 46 | #include |
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| 47 | struct e820entry { |
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| 48 | __u64 addr; /* start of memory segment */ |
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| 49 | __u64 size; /* size of memory segment */ |
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| 50 | __u32 type; /* type of memory segment */ |
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| 51 | } __attribute__((packed)); |
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| 52 | |||
| 53 | struct e820map { |
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| 54 | __u32 nr_map; |
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| 55 | struct e820entry map[E820_X_MAX]; |
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| 56 | }; |
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| 57 | |||
| 58 | #define ISA_START_ADDRESS 0xa0000 |
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| 59 | #define ISA_END_ADDRESS 0x100000 |
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| 60 | |||
| 61 | #define BIOS_BEGIN 0x000a0000 |
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| 62 | #define BIOS_END 0x00100000 |
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| 63 | |||
| 64 | #define BIOS_ROM_BASE 0xffe00000 |
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| 65 | #define BIOS_ROM_END 0xffffffff |
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| 66 | |||
| 67 | #endif /* __ASSEMBLY__ */ |
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| 68 | |||
| 69 | |||
| 70 | #endif /* _UAPI_ASM_X86_E820_H */ |