projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * structures and definitions for the int 15, ax=e820 memory map | |
| 3 | * scheme. | |
| 4 | * | |
| 5 | * In a nutshell, arch/i386/boot/setup.S populates a scratch table | |
| 6 | * in the empty_zero_block that contains a list of usable address/size | |
| 7 | * duples. In arch/i386/kernel/setup.c, this information is | |
| 8 | * transferred into the e820map, and in arch/i386/mm/init.c, that | |
| 9 | * new information is used to mark pages reserved or not. | |
| 10 | * | |
| 11 | */ | |
| 12 | #ifndef __E820_HEADER | |
| 13 | #define __E820_HEADER | |
| 14 | ||
| 15 | #define E820MAP 0x2d0 /* our map */ | |
| f9ba7053 | 16 | #define E820MAX 128 /* number of entries in E820MAP */ |
| 1da177e4 LT |
17 | #define E820NR 0x1e8 /* # entries in E820MAP */ |
| 18 | ||
| 19 | #define E820_RAM 1 | |
| 20 | #define E820_RESERVED 2 | |
| 80d2679c | 21 | #define E820_ACPI 3 |
| 1da177e4 LT |
22 | #define E820_NVS 4 |
| 23 | ||
| 24 | #define HIGH_MEMORY (1024*1024) | |
| 25 | ||
| 26 | #ifndef __ASSEMBLY__ | |
| 27 | ||
| 9c25d134 PA |
28 | struct e820entry { |
| 29 | u64 addr; /* start of memory segment */ | |
| 30 | u64 size; /* size of memory segment */ | |
| 31 | u32 type; /* type of memory segment */ | |
| 32 | } __attribute__((packed)); | |
| 33 | ||
| 1da177e4 | 34 | struct e820map { |
| 9c25d134 PA |
35 | u32 nr_map; |
| 36 | struct e820entry map[E820MAX]; | |
| 1da177e4 LT |
37 | }; |
| 38 | ||
| 39 | extern struct e820map e820; | |
| 95222368 AV |
40 | |
| 41 | extern int e820_all_mapped(unsigned long start, unsigned long end, | |
| 42 | unsigned type); | |
| b92e9fac | 43 | extern int e820_any_mapped(u64 start, u64 end, unsigned type); |
| b2dff6a8 | 44 | extern void find_max_pfn(void); |
| b5b24057 | 45 | extern void register_bootmem_low_pages(unsigned long max_low_pfn); |
| 5c95da9f | 46 | extern void e820_register_memory(void); |
| cef518e8 | 47 | extern void limit_regions(unsigned long long size); |
| 48 | extern void print_memory_map(char *who); | |
| 95222368 | 49 | |
| b0cb1a19 | 50 | #if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION) |
| 1c10070a RW |
51 | extern void e820_mark_nosave_regions(void); |
| 52 | #else | |
| 53 | static inline void e820_mark_nosave_regions(void) | |
| 54 | { | |
| 55 | } | |
| 56 | #endif | |
| 57 | ||
| 1da177e4 LT |
58 | #endif/*!__ASSEMBLY__*/ |
| 59 | ||
| 60 | #endif/*__E820_HEADER*/ |