git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 | |
| 3 | */ | |
| 4 | #ifndef _LINUX_BOOTMEM_H | |
| 5 | #define _LINUX_BOOTMEM_H | |
| 6 | ||
| 7 | #include <asm/pgtable.h> | |
| 8 | #include <asm/dma.h> | |
| 9 | #include <linux/cache.h> | |
| 10 | #include <linux/init.h> | |
| 11 | #include <linux/mmzone.h> | |
| 12 | ||
| 13 | /* | |
| 14 | * simple boot-time physical memory area allocator. | |
| 15 | */ | |
| 16 | ||
| 17 | extern unsigned long max_low_pfn; | |
| 18 | extern unsigned long min_low_pfn; | |
| 19 | ||
| 20 | /* | |
| 21 | * highest page | |
| 22 | */ | |
| 23 | extern unsigned long max_pfn; | |
| 24 | ||
| 25 | /* | |
| 26 | * node_bootmem_map is a map pointer - the bits represent all physical | |
| 27 | * memory pages (including holes) on the node. | |
| 28 | */ | |
| 29 | typedef struct bootmem_data { | |
| 30 | unsigned long node_boot_start; | |
| 31 | unsigned long node_low_pfn; | |
| 32 | void *node_bootmem_map; | |
| 33 | unsigned long last_offset; | |
| 34 | unsigned long last_pos; | |
| 35 | unsigned long last_success; /* Previous allocation point. To speed | |
| 36 | * up searching */ | |
| 37 | } bootmem_data_t; | |
| 38 | ||
| 39 | extern unsigned long __init bootmem_bootmap_pages (unsigned long); | |
| 40 | extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend); | |
| 41 | extern void __init free_bootmem (unsigned long addr, unsigned long size); | |
| 42 | extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal); | |
| 43 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE | |
| 44 | extern void __init reserve_bootmem (unsigned long addr, unsigned long size); | |
| 45 | #define alloc_bootmem(x) \ | |
| 46 | __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) | |
| 47 | #define alloc_bootmem_low(x) \ | |
| 48 | __alloc_bootmem((x), SMP_CACHE_BYTES, 0) | |
| 49 | #define alloc_bootmem_pages(x) \ | |
| 50 | __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) | |
| 51 | #define alloc_bootmem_low_pages(x) \ | |
| 52 | __alloc_bootmem((x), PAGE_SIZE, 0) | |
| 53 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ | |
| 54 | extern unsigned long __init free_all_bootmem (void); | |
| 55 | ||
| 56 | extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn); | |
| 57 | extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size); | |
| 58 | extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size); | |
| 59 | extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat); | |
| 60 | extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal); | |
| 61 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE | |
| 62 | #define alloc_bootmem_node(pgdat, x) \ | |
| 63 | __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) | |
| 64 | #define alloc_bootmem_pages_node(pgdat, x) \ | |
| 65 | __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) | |
| 66 | #define alloc_bootmem_low_pages_node(pgdat, x) \ | |
| 67 | __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0) | |
| 68 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ | |
| 69 | ||
| 70 | extern unsigned long __initdata nr_kernel_pages; | |
| 71 | extern unsigned long __initdata nr_all_pages; | |
| 72 | ||
| 73 | extern void *__init alloc_large_system_hash(const char *tablename, | |
| 74 | unsigned long bucketsize, | |
| 75 | unsigned long numentries, | |
| 76 | int scale, | |
| 77 | int flags, | |
| 78 | unsigned int *_hash_shift, | |
| 79 | unsigned int *_hash_mask, | |
| 80 | unsigned long limit); | |
| 81 | ||
| 82 | #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */ | |
| 83 | #define HASH_EARLY 0x00000002 /* Allocating during early boot? */ | |
| 84 | ||
| 85 | /* Only NUMA needs hash distribution. | |
| 86 | * IA64 is known to have sufficient vmalloc space. | |
| 87 | */ | |
| 88 | #if defined(CONFIG_NUMA) && defined(CONFIG_IA64) | |
| 89 | #define HASHDIST_DEFAULT 1 | |
| 90 | #else | |
| 91 | #define HASHDIST_DEFAULT 0 | |
| 92 | #endif | |
| 93 | extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */ | |
| 94 | ||
| 95 | ||
| 96 | #endif /* _LINUX_BOOTMEM_H */ |