projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ee8e7cfe RR |
1 | #ifndef __ASM_E820_H |
| 2 | #define __ASM_E820_H | |
| 3 | #define E820MAP 0x2d0 /* our map */ | |
| 4 | #define E820MAX 128 /* number of entries in E820MAP */ | |
| 028b7858 PJ |
5 | |
| 6 | /* | |
| 7 | * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the | |
| 8 | * constrained space in the zeropage. If we have more nodes than | |
| 9 | * that, and if we've booted off EFI firmware, then the EFI tables | |
| 10 | * passed us from the EFI firmware can list more nodes. Size our | |
| 11 | * internal memory map tables to have room for these additional | |
| 12 | * nodes, based on up to three entries per node for which the | |
| 13 | * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT), | |
| 14 | * plus E820MAX, allowing space for the possible duplicate E820 | |
| 15 | * entries that might need room in the same arrays, prior to the | |
| 16 | * call to sanitize_e820_map() to remove duplicates. The allowance | |
| 17 | * of three memory map entries per node is "enough" entries for | |
| 18 | * the initial hardware platform motivating this mechanism to make | |
| 19 | * use of additional EFI map entries. Future platforms may want | |
| 20 | * to allow more than three entries per node or otherwise refine | |
| 21 | * this size. | |
| 22 | */ | |
| 23 | ||
| 24 | /* | |
| 25 | * Odd: 'make headers_check' complains about numa.h if I try | |
| 26 | * to collapse the next two #ifdef lines to a single line: | |
| 27 | * #if defined(__KERNEL__) && defined(CONFIG_EFI) | |
| 28 | */ | |
| 29 | #ifdef __KERNEL__ | |
| 30 | #ifdef CONFIG_EFI | |
| 31 | #include <linux/numa.h> | |
| 32 | #define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES) | |
| 33 | #else /* ! CONFIG_EFI */ | |
| 34 | #define E820_X_MAX E820MAX | |
| 35 | #endif | |
| 36 | #else /* ! __KERNEL__ */ | |
| 37 | #define E820_X_MAX E820MAX | |
| 38 | #endif | |
| 39 | ||
| ee8e7cfe RR |
40 | #define E820NR 0x1e8 /* # entries in E820MAP */ |
| 41 | ||
| 42 | #define E820_RAM 1 | |
| 43 | #define E820_RESERVED 2 | |
| 44 | #define E820_ACPI 3 | |
| 45 | #define E820_NVS 4 | |
| 46 | ||
| 47 | #ifndef __ASSEMBLY__ | |
| 48 | struct e820entry { | |
| 49 | __u64 addr; /* start of memory segment */ | |
| 50 | __u64 size; /* size of memory segment */ | |
| 51 | __u32 type; /* type of memory segment */ | |
| 52 | } __attribute__((packed)); | |
| 53 | ||
| 54 | struct e820map { | |
| 55 | __u32 nr_map; | |
| 028b7858 | 56 | struct e820entry map[E820_X_MAX]; |
| ee8e7cfe | 57 | }; |
| b79cd8f1 YL |
58 | |
| 59 | extern struct e820map e820; | |
| 60 | ||
| 61 | extern int e820_any_mapped(u64 start, u64 end, unsigned type); | |
| 62 | extern int e820_all_mapped(u64 start, u64 end, unsigned type); | |
| 63 | extern void add_memory_region(u64 start, u64 size, int type); | |
| 64 | extern void e820_print_map(char *who); | |
| c3965bd1 PJ |
65 | extern int |
| 66 | sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, char *pnr_map); | |
| b79cd8f1 YL |
67 | extern int copy_e820_map(struct e820entry *biosmap, int nr_map); |
| 68 | extern u64 update_memory_range(u64 start, u64 size, unsigned old_type, | |
| 69 | unsigned new_type); | |
| 70 | extern void update_e820(void); | |
| 71 | extern void e820_setup_gap(void); | |
| 72 | ||
| ee8e7cfe RR |
73 | #endif /* __ASSEMBLY__ */ |
| 74 | ||
| 306c142f IM |
75 | #define ISA_START_ADDRESS 0xa0000 |
| 76 | #define ISA_END_ADDRESS 0x100000 | |
| 77 | ||
| 950f9d95 TG |
78 | #define BIOS_BEGIN 0x000a0000 |
| 79 | #define BIOS_END 0x00100000 | |
| 80 | ||
| ee8e7cfe | 81 | #ifdef __KERNEL__ |
| 96a388de TG |
82 | #ifdef CONFIG_X86_32 |
| 83 | # include "e820_32.h" | |
| 84 | #else | |
| 85 | # include "e820_64.h" | |
| 86 | #endif | |
| ee8e7cfe RR |
87 | #endif /* __KERNEL__ */ |
| 88 | ||
| 89 | #endif /* __ASM_E820_H */ |