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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 | #ifdef CONFIG_CRASH_DUMP |
23 | extern 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 | */ |
31 | typedef 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 | |
40 | extern bootmem_data_t bootmem_node_data[]; |
41 | #endif |
42 | |
43 | extern unsigned long bootmem_bootmap_pages(unsigned long); |
44 | |
45 | extern unsigned long init_bootmem_node(pg_data_t *pgdat, |
46 | unsigned long freepfn, |
47 | unsigned long startpfn, |
48 | unsigned long endpfn); |
49 | extern unsigned long init_bootmem(unsigned long addr, unsigned long memend); |
50 | |
51 | unsigned long free_all_memory_core_early(int nodeid); |
52 | extern unsigned long free_all_bootmem_node(pg_data_t *pgdat); |
53 | extern unsigned long free_all_bootmem(void); |
54 | |
55 | extern void free_bootmem_node(pg_data_t *pgdat, |
56 | unsigned long addr, |
57 | unsigned long size); |
58 | extern void free_bootmem(unsigned long addr, unsigned long size); |
59 | extern 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 | |
72 | extern int reserve_bootmem(unsigned long addr, |
73 | unsigned long size, |
74 | int flags); |
75 | extern int reserve_bootmem_node(pg_data_t *pgdat, |
76 | unsigned long physaddr, |
77 | unsigned long size, |
78 | int flags); |
79 | |
80 | extern void *__alloc_bootmem(unsigned long size, |
81 | unsigned long align, |
82 | unsigned long goal); |
83 | extern void *__alloc_bootmem_nopanic(unsigned long size, |
84 | unsigned long align, |
85 | unsigned long goal); |
86 | extern void *__alloc_bootmem_node(pg_data_t *pgdat, |
87 | unsigned long size, |
88 | unsigned long align, |
89 | unsigned long goal); |
90 | void *__alloc_bootmem_node_high(pg_data_t *pgdat, |
91 | unsigned long size, |
92 | unsigned long align, |
93 | unsigned long goal); |
94 | extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat, |
95 | unsigned long size, |
96 | unsigned long align, |
97 | unsigned long goal); |
98 | extern void *__alloc_bootmem_low(unsigned long size, |
99 | unsigned long align, |
100 | unsigned long goal); |
101 | extern 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 | |
130 | extern int reserve_bootmem_generic(unsigned long addr, unsigned long size, |
131 | int flags); |
132 | |
133 | extern void *alloc_bootmem_section(unsigned long size, |
134 | unsigned long section_nr); |
135 | |
136 | #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP |
137 | extern void *alloc_remap(int nid, unsigned long size); |
138 | #else |
139 | static inline void *alloc_remap(int nid, unsigned long size) |
140 | { |
141 | return NULL; |
142 | } |
143 | #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */ |
144 | |
145 | extern 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 |
166 | extern int hashdist; /* Distribute hashes across NUMA nodes? */ |
167 | |
168 | |
169 | #endif /* _LINUX_BOOTMEM_H */ |
170 |
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