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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 */><> |