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