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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 | |
3 | */ | |
4 | #ifndef _LINUX_BOOTMEM_H | |
5 | #define _LINUX_BOOTMEM_H | |
6 | ||
1da177e4 | 7 | #include <linux/mmzone.h> |
e786e86a | 8 | #include <asm/dma.h> |
1da177e4 LT |
9 | |
10 | /* | |
11 | * simple boot-time physical memory area allocator. | |
12 | */ | |
13 | ||
14 | extern unsigned long max_low_pfn; | |
15 | extern unsigned long min_low_pfn; | |
16 | ||
17 | /* | |
18 | * highest page | |
19 | */ | |
20 | extern unsigned long max_pfn; | |
21 | ||
92aa63a5 VG |
22 | #ifdef CONFIG_CRASH_DUMP |
23 | extern unsigned long saved_max_pfn; | |
24 | #endif | |
25 | ||
1da177e4 LT |
26 | /* |
27 | * node_bootmem_map is a map pointer - the bits represent all physical | |
28 | * memory pages (including holes) on the node. | |
29 | */ | |
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 | |
37 | * up searching */ | |
679bc9fb | 38 | struct list_head list; |
1da177e4 LT |
39 | } bootmem_data_t; |
40 | ||
f71bf0ca FBH |
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, | |
45 | unsigned long align, | |
46 | unsigned long goal); | |
47 | extern void *__alloc_bootmem_nopanic(unsigned long size, | |
48 | unsigned long align, | |
49 | unsigned long goal); | |
50 | extern void *__alloc_bootmem_low(unsigned long size, | |
51 | unsigned long align, | |
52 | unsigned long goal); | |
53 | extern void *__alloc_bootmem_low_node(pg_data_t *pgdat, | |
54 | unsigned long size, | |
55 | unsigned long align, | |
56 | unsigned long goal); | |
57 | extern void *__alloc_bootmem_core(struct bootmem_data *bdata, | |
58 | unsigned long size, | |
bb0923a6 | 59 | unsigned long align, |
f71bf0ca FBH |
60 | unsigned long goal, |
61 | unsigned long limit); | |
62 | ||
72a7fe39 BW |
63 | /* |
64 | * flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE, | |
65 | * the architecture-specific code should honor this) | |
66 | */ | |
67 | #define BOOTMEM_DEFAULT 0 | |
68 | #define BOOTMEM_EXCLUSIVE (1<<0) | |
69 | ||
1da177e4 | 70 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
72a7fe39 BW |
71 | /* |
72 | * If flags is 0, then the return value is always 0 (success). If | |
73 | * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the | |
74 | * memory already was reserved. | |
75 | */ | |
76 | extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags); | |
1da177e4 | 77 | #define alloc_bootmem(x) \ |
71fb2e8f | 78 | __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) |
1da177e4 | 79 | #define alloc_bootmem_low(x) \ |
71fb2e8f | 80 | __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0) |
1da177e4 | 81 | #define alloc_bootmem_pages(x) \ |
71fb2e8f | 82 | __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) |
1da177e4 | 83 | #define alloc_bootmem_low_pages(x) \ |
71fb2e8f | 84 | __alloc_bootmem_low(x, PAGE_SIZE, 0) |
1da177e4 | 85 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
f71bf0ca | 86 | |
d2dbf343 YL |
87 | extern int reserve_bootmem_generic(unsigned long addr, unsigned long size, |
88 | int flags); | |
f71bf0ca FBH |
89 | extern unsigned long free_all_bootmem(void); |
90 | extern unsigned long free_all_bootmem_node(pg_data_t *pgdat); | |
91 | extern void *__alloc_bootmem_node(pg_data_t *pgdat, | |
92 | unsigned long size, | |
93 | unsigned long align, | |
94 | unsigned long goal); | |
95 | extern unsigned long init_bootmem_node(pg_data_t *pgdat, | |
96 | unsigned long freepfn, | |
97 | unsigned long startpfn, | |
98 | unsigned long endpfn); | |
71c2742f | 99 | extern int reserve_bootmem_node(pg_data_t *pgdat, |
f71bf0ca | 100 | unsigned long physaddr, |
72a7fe39 BW |
101 | unsigned long size, |
102 | int flags); | |
f71bf0ca FBH |
103 | extern void free_bootmem_node(pg_data_t *pgdat, |
104 | unsigned long addr, | |
105 | unsigned long size); | |
e70260aa YG |
106 | extern void *alloc_bootmem_section(unsigned long size, |
107 | unsigned long section_nr); | |
f71bf0ca | 108 | |
1da177e4 LT |
109 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
110 | #define alloc_bootmem_node(pgdat, x) \ | |
71fb2e8f | 111 | __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) |
1da177e4 | 112 | #define alloc_bootmem_pages_node(pgdat, x) \ |
71fb2e8f | 113 | __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) |
1da177e4 | 114 | #define alloc_bootmem_low_pages_node(pgdat, x) \ |
71fb2e8f | 115 | __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0) |
1da177e4 LT |
116 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
117 | ||
6f167ec7 DH |
118 | #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP |
119 | extern void *alloc_remap(int nid, unsigned long size); | |
120 | #else | |
121 | static inline void *alloc_remap(int nid, unsigned long size) | |
122 | { | |
123 | return NULL; | |
124 | } | |
f71bf0ca | 125 | #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */ |
6f167ec7 | 126 | |
9dec17eb | 127 | extern unsigned long __meminitdata nr_kernel_pages; |
8da38d7b | 128 | extern unsigned long __meminitdata nr_all_pages; |
1da177e4 | 129 | |
f71bf0ca FBH |
130 | extern void *alloc_large_system_hash(const char *tablename, |
131 | unsigned long bucketsize, | |
132 | unsigned long numentries, | |
133 | int scale, | |
134 | int flags, | |
135 | unsigned int *_hash_shift, | |
136 | unsigned int *_hash_mask, | |
137 | unsigned long limit); | |
1da177e4 | 138 | |
04903664 | 139 | #define HASH_EARLY 0x00000001 /* Allocating during early boot? */ |
1da177e4 LT |
140 | |
141 | /* Only NUMA needs hash distribution. | |
e073ae1b | 142 | * IA64 and x86_64 have sufficient vmalloc space. |
1da177e4 | 143 | */ |
e073ae1b | 144 | #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64)) |
1da177e4 LT |
145 | #define HASHDIST_DEFAULT 1 |
146 | #else | |
147 | #define HASHDIST_DEFAULT 0 | |
148 | #endif | |
f034b5d4 | 149 | extern int hashdist; /* Distribute hashes across NUMA nodes? */ |
1da177e4 LT |
150 | |
151 | ||
152 | #endif /* _LINUX_BOOTMEM_H */ |