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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /* * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 */ #ifndef _LINUX_BOOTMEM_H #define _LINUX_BOOTMEM_H #include <linux/mmzone.h> #include <asm/dma.h> /* * simple boot-time physical memory area allocator. */ extern unsigned long max_low_pfn; extern unsigned long min_low_pfn; /* * highest page */ extern unsigned long max_pfn; #ifdef CONFIG_CRASH_DUMP extern unsigned long saved_max_pfn; #endif /* * node_bootmem_map is a map pointer - the bits represent all physical * memory pages (including holes) on the node. */ typedef struct bootmem_data { unsigned long node_boot_start; unsigned long node_low_pfn; void *node_bootmem_map; unsigned long last_offset; unsigned long last_pos; unsigned long last_success; /* Previous allocation point. To speed * up searching */ struct list_head list; } bootmem_data_t; extern unsigned long bootmem_bootmap_pages(unsigned long); extern unsigned long init_bootmem(unsigned long addr, unsigned long memend); extern void free_bootmem(unsigned long addr, unsigned long size); extern void *__alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal); extern void *__alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal); extern void *__alloc_bootmem_low(unsigned long size, unsigned long align, unsigned long goal); extern void *__alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal); extern void *__alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit); #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE extern void reserve_bootmem(unsigned long addr, unsigned long size); #define alloc_bootmem(x) \ __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) #define alloc_bootmem_low(x) \ __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0) #define alloc_bootmem_pages(x) \ __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) #define alloc_bootmem_low_pages(x) \ __alloc_bootmem_low(x, PAGE_SIZE, 0) #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ extern unsigned long free_all_bootmem(void); extern unsigned long free_all_bootmem_node(pg_data_t *pgdat); extern void *__alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal); extern unsigned long init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn); extern void reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, unsigned long size); extern void free_bootmem_node(pg_data_t *pgdat, unsigned long addr, unsigned long size); #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE #define alloc_bootmem_node(pgdat, x) \ __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) #define alloc_bootmem_pages_node(pgdat, x) \ __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) #define alloc_bootmem_low_pages_node(pgdat, x) \ __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0) #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP extern void *alloc_remap(int nid, unsigned long size); #else static inline void *alloc_remap(int nid, unsigned long size) { return NULL; } #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */ extern unsigned long __meminitdata nr_kernel_pages; extern unsigned long nr_all_pages; extern void *alloc_large_system_hash(const char *tablename, unsigned long bucketsize, unsigned long numentries, int scale, int flags, unsigned int *_hash_shift, unsigned int *_hash_mask, unsigned long limit); #define HASH_EARLY 0x00000001 /* Allocating during early boot? */ /* Only NUMA needs hash distribution. * IA64 is known to have sufficient vmalloc space. */ #if defined(CONFIG_NUMA) && defined(CONFIG_IA64) #define HASHDIST_DEFAULT 1 #else #define HASHDIST_DEFAULT 0 #endif extern int hashdist; /* Distribute hashes across NUMA nodes? */ #endif /* _LINUX_BOOTMEM_H */ |