2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
4 #ifndef _LINUX_BOOTMEM_H
5 #define _LINUX_BOOTMEM_H
7 #include <linux/mmzone.h>
11 * simple boot-time physical memory area allocator.
14 extern unsigned long max_low_pfn;
15 extern unsigned long min_low_pfn;
20 extern unsigned long max_pfn;
22 #ifdef CONFIG_CRASH_DUMP
23 extern unsigned long saved_max_pfn;
27 * node_bootmem_map is a map pointer - the bits represent all physical
28 * memory pages (including holes) on the node.
30 typedef struct bootmem_data {
31 unsigned long node_boot_start;
32 unsigned long node_low_pfn;
33 void *node_bootmem_map;
34 unsigned long last_offset;
35 unsigned long last_pos;
36 unsigned long last_success; /* Previous allocation point. To speed
38 struct list_head list;
41 extern unsigned long bootmem_bootmap_pages(unsigned long);
42 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
43 extern void free_bootmem(unsigned long addr, unsigned long size);
44 extern void *__alloc_bootmem(unsigned long size,
47 extern void *__alloc_bootmem_nopanic(unsigned long size,
50 extern void *__alloc_bootmem_low(unsigned long size,
53 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
57 extern void *__alloc_bootmem_core(struct bootmem_data *bdata,
62 extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size);
64 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
65 extern void reserve_bootmem(unsigned long addr, unsigned long size);
66 #define alloc_bootmem(x) \
67 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
68 #define alloc_bootmem_low(x) \
69 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
70 #define alloc_bootmem_pages(x) \
71 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
72 #define alloc_bootmem_low_pages(x) \
73 __alloc_bootmem_low(x, PAGE_SIZE, 0)
74 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
76 extern unsigned long free_all_bootmem(void);
77 extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
78 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
82 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
83 unsigned long freepfn,
84 unsigned long startpfn,
85 unsigned long endpfn);
86 extern void reserve_bootmem_node(pg_data_t *pgdat,
87 unsigned long physaddr,
89 extern void free_bootmem_node(pg_data_t *pgdat,
93 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
94 #define alloc_bootmem_node(pgdat, x) \
95 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
96 #define alloc_bootmem_pages_node(pgdat, x) \
97 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
98 #define alloc_bootmem_low_pages_node(pgdat, x) \
99 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
100 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
102 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
103 extern void *alloc_remap(int nid, unsigned long size);
105 static inline void *alloc_remap(int nid, unsigned long size)
109 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
111 extern unsigned long __meminitdata nr_kernel_pages;
112 extern unsigned long __meminitdata nr_all_pages;
114 extern void *alloc_large_system_hash(const char *tablename,
115 unsigned long bucketsize,
116 unsigned long numentries,
119 unsigned int *_hash_shift,
120 unsigned int *_hash_mask,
121 unsigned long limit);
123 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
125 /* Only NUMA needs hash distribution.
126 * IA64 and x86_64 have sufficient vmalloc space.
128 #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
129 #define HASHDIST_DEFAULT 1
131 #define HASHDIST_DEFAULT 0
133 extern int hashdist; /* Distribute hashes across NUMA nodes? */
136 #endif /* _LINUX_BOOTMEM_H */