1/* 2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 3 */ 4#ifndef _LINUX_BOOTMEM_H 5#define _LINUX_BOOTMEM_H 6 7#include <linux/mmzone.h> 8#include <asm/dma.h> 9 10/* 11 * simple boot-time physical memory area allocator. 12 */ 13 14extern unsigned long max_low_pfn; 15extern unsigned long min_low_pfn; 16 17/* 18 * highest page 19 */ 20extern unsigned long max_pfn; 21 22#ifdef CONFIG_CRASH_DUMP 23extern unsigned long saved_max_pfn; 24#endif 25 26#ifndef CONFIG_NO_BOOTMEM 27/* 28 * node_bootmem_map is a map pointer - the bits represent all physical 29 * memory pages (including holes) on the node. 30 */ 31typedef struct bootmem_data { 32 unsigned long node_min_pfn; 33 unsigned long node_low_pfn; 34 void *node_bootmem_map; 35 unsigned long last_end_off; 36 unsigned long hint_idx; 37 struct list_head list; 38} bootmem_data_t; 39 40extern bootmem_data_t bootmem_node_data[]; 41#endif 42 43extern unsigned long bootmem_bootmap_pages(unsigned long); 44 45extern unsigned long init_bootmem_node(pg_data_t *pgdat, 46 unsigned long freepfn, 47 unsigned long startpfn, 48 unsigned long endpfn); 49extern unsigned long init_bootmem(unsigned long addr, unsigned long memend); 50 51unsigned long free_all_memory_core_early(int nodeid); 52extern unsigned long free_all_bootmem_node(pg_data_t *pgdat); 53extern unsigned long free_all_bootmem(void); 54 55extern void free_bootmem_node(pg_data_t *pgdat, 56 unsigned long addr, 57 unsigned long size); 58extern void free_bootmem(unsigned long addr, unsigned long size); 59extern void free_bootmem_late(unsigned long addr, unsigned long size); 60 61/* 62 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE, 63 * the architecture-specific code should honor this). 64 * 65 * If flags is 0, then the return value is always 0 (success). If 66 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the 67 * memory already was reserved. 68 */ 69#define BOOTMEM_DEFAULT 0 70#define BOOTMEM_EXCLUSIVE (1<<0) 71 72extern int reserve_bootmem(unsigned long addr, 73 unsigned long size, 74 int flags); 75extern int reserve_bootmem_node(pg_data_t *pgdat, 76 unsigned long physaddr, 77 unsigned long size, 78 int flags); 79 80extern void *__alloc_bootmem(unsigned long size, 81 unsigned long align, 82 unsigned long goal); 83extern void *__alloc_bootmem_nopanic(unsigned long size, 84 unsigned long align, 85 unsigned long goal); 86extern void *__alloc_bootmem_node(pg_data_t *pgdat, 87 unsigned long size, 88 unsigned long align, 89 unsigned long goal); 90void *__alloc_bootmem_node_high(pg_data_t *pgdat, 91 unsigned long size, 92 unsigned long align, 93 unsigned long goal); 94extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat, 95 unsigned long size, 96 unsigned long align, 97 unsigned long goal); 98extern void *__alloc_bootmem_low(unsigned long size, 99 unsigned long align, 100 unsigned long goal); 101extern void *__alloc_bootmem_low_node(pg_data_t *pgdat, 102 unsigned long size, 103 unsigned long align, 104 unsigned long goal); 105 106#define alloc_bootmem(x) \ 107 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) 108#define alloc_bootmem_align(x, align) \ 109 __alloc_bootmem(x, align, __pa(MAX_DMA_ADDRESS)) 110#define alloc_bootmem_nopanic(x) \ 111 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) 112#define alloc_bootmem_pages(x) \ 113 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) 114#define alloc_bootmem_pages_nopanic(x) \ 115 __alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) 116#define alloc_bootmem_node(pgdat, x) \ 117 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) 118#define alloc_bootmem_pages_node(pgdat, x) \ 119 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) 120#define alloc_bootmem_pages_node_nopanic(pgdat, x) \ 121 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) 122 123#define alloc_bootmem_low(x) \ 124 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0) 125#define alloc_bootmem_low_pages(x) \ 126 __alloc_bootmem_low(x, PAGE_SIZE, 0) 127#define alloc_bootmem_low_pages_node(pgdat, x) \ 128 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0) 129 130extern int reserve_bootmem_generic(unsigned long addr, unsigned long size, 131 int flags); 132 133extern void *alloc_bootmem_section(unsigned long size, 134 unsigned long section_nr); 135 136#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP 137extern void *alloc_remap(int nid, unsigned long size); 138#else 139static inline void *alloc_remap(int nid, unsigned long size) 140{ 141 return NULL; 142} 143#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */ 144 145extern void *alloc_large_system_hash(const char *tablename, 146 unsigned long bucketsize, 147 unsigned long numentries, 148 int scale, 149 int flags, 150 unsigned int *_hash_shift, 151 unsigned int *_hash_mask, 152 unsigned long limit); 153 154#define HASH_EARLY 0x00000001 /* Allocating during early boot? */ 155#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min 156 * shift passed via *_hash_shift */ 157 158/* Only NUMA needs hash distribution. 64bit NUMA architectures have 159 * sufficient vmalloc space. 160 */ 161#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT) 162#define HASHDIST_DEFAULT 1 163#else 164#define HASHDIST_DEFAULT 0 165#endif 166extern int hashdist; /* Distribute hashes across NUMA nodes? */ 167 168 169#endif /* _LINUX_BOOTMEM_H */ 170