Rusty Russell | ee8e7cf | 2007-10-22 10:56:19 +1000 | [diff] [blame] | 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 */ |
Paul Jackson | 028b785 | 2008-05-14 08:15:40 -0700 | [diff] [blame] | 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 | |
Rusty Russell | ee8e7cf | 2007-10-22 10:56:19 +1000 | [diff] [blame] | 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; |
Paul Jackson | 028b785 | 2008-05-14 08:15:40 -0700 | [diff] [blame] | 56 | struct e820entry map[E820_X_MAX]; |
Rusty Russell | ee8e7cf | 2007-10-22 10:56:19 +1000 | [diff] [blame] | 57 | }; |
Yinghai Lu | b79cd8f | 2008-05-11 00:30:15 -0700 | [diff] [blame] | 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); |
Paul Jackson | c3965bd | 2008-05-14 08:15:34 -0700 | [diff] [blame] | 65 | extern int |
Paul Jackson | 6e9bcc7 | 2008-05-14 08:15:46 -0700 | [diff] [blame] | 66 | sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map); |
Yinghai Lu | b79cd8f | 2008-05-11 00:30:15 -0700 | [diff] [blame] | 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 | |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame^] | 73 | extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align); |
| 74 | extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align); |
| 75 | extern void reserve_early(u64 start, u64 end, char *name); |
| 76 | extern void free_early(u64 start, u64 end); |
| 77 | extern void early_res_to_bootmem(u64 start, u64 end); |
| 78 | |
Rusty Russell | ee8e7cf | 2007-10-22 10:56:19 +1000 | [diff] [blame] | 79 | #endif /* __ASSEMBLY__ */ |
| 80 | |
Ingo Molnar | 306c142 | 2008-01-30 13:33:08 +0100 | [diff] [blame] | 81 | #define ISA_START_ADDRESS 0xa0000 |
| 82 | #define ISA_END_ADDRESS 0x100000 |
| 83 | |
Thomas Gleixner | 950f9d9 | 2008-01-30 13:34:06 +0100 | [diff] [blame] | 84 | #define BIOS_BEGIN 0x000a0000 |
| 85 | #define BIOS_END 0x00100000 |
| 86 | |
Rusty Russell | ee8e7cf | 2007-10-22 10:56:19 +1000 | [diff] [blame] | 87 | #ifdef __KERNEL__ |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 88 | #ifdef CONFIG_X86_32 |
| 89 | # include "e820_32.h" |
| 90 | #else |
| 91 | # include "e820_64.h" |
| 92 | #endif |
Rusty Russell | ee8e7cf | 2007-10-22 10:56:19 +1000 | [diff] [blame] | 93 | #endif /* __KERNEL__ */ |
| 94 | |
| 95 | #endif /* __ASM_E820_H */ |