mm: unexport __alloc_bootmem_core()
[linux-2.6.git] / include / linux / bootmem.h
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 /*
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 */
38         struct list_head list;
39 } bootmem_data_t;
40
41 extern bootmem_data_t bootmem_node_data[];
42
43 extern unsigned long bootmem_bootmap_pages(unsigned long);
44 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
45 extern void free_bootmem(unsigned long addr, unsigned long size);
46 extern void *__alloc_bootmem(unsigned long size,
47                              unsigned long align,
48                              unsigned long goal);
49 extern void *__alloc_bootmem_nopanic(unsigned long size,
50                                      unsigned long align,
51                                      unsigned long goal);
52 extern void *__alloc_bootmem_low(unsigned long size,
53                                  unsigned long align,
54                                  unsigned long goal);
55 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
56                                       unsigned long size,
57                                       unsigned long align,
58                                       unsigned long goal);
59
60 /*
61  * flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
62  * the architecture-specific code should honor this)
63  */
64 #define BOOTMEM_DEFAULT         0
65 #define BOOTMEM_EXCLUSIVE       (1<<0)
66
67 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
68 /*
69  * If flags is 0, then the return value is always 0 (success). If
70  * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
71  * memory already was reserved.
72  */
73 extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
74 #define alloc_bootmem(x) \
75         __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
76 #define alloc_bootmem_low(x) \
77         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
78 #define alloc_bootmem_pages(x) \
79         __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
80 #define alloc_bootmem_low_pages(x) \
81         __alloc_bootmem_low(x, PAGE_SIZE, 0)
82 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
83
84 extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
85                                    int flags);
86 extern unsigned long free_all_bootmem(void);
87 extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
88 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
89                                   unsigned long size,
90                                   unsigned long align,
91                                   unsigned long goal);
92 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
93                                        unsigned long freepfn,
94                                        unsigned long startpfn,
95                                        unsigned long endpfn);
96 extern int reserve_bootmem_node(pg_data_t *pgdat,
97                                  unsigned long physaddr,
98                                  unsigned long size,
99                                  int flags);
100 extern void free_bootmem_node(pg_data_t *pgdat,
101                               unsigned long addr,
102                               unsigned long size);
103 extern void *alloc_bootmem_section(unsigned long size,
104                                    unsigned long section_nr);
105
106 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
107 #define alloc_bootmem_node(pgdat, x) \
108         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
109 #define alloc_bootmem_pages_node(pgdat, x) \
110         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
111 #define alloc_bootmem_low_pages_node(pgdat, x) \
112         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
113 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
114
115 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
116 extern void *alloc_remap(int nid, unsigned long size);
117 #else
118 static inline void *alloc_remap(int nid, unsigned long size)
119 {
120         return NULL;
121 }
122 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
123
124 extern unsigned long __meminitdata nr_kernel_pages;
125 extern unsigned long __meminitdata nr_all_pages;
126
127 extern void *alloc_large_system_hash(const char *tablename,
128                                      unsigned long bucketsize,
129                                      unsigned long numentries,
130                                      int scale,
131                                      int flags,
132                                      unsigned int *_hash_shift,
133                                      unsigned int *_hash_mask,
134                                      unsigned long limit);
135
136 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
137
138 /* Only NUMA needs hash distribution.
139  * IA64 and x86_64 have sufficient vmalloc space.
140  */
141 #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
142 #define HASHDIST_DEFAULT 1
143 #else
144 #define HASHDIST_DEFAULT 0
145 #endif
146 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
147
148
149 #endif /* _LINUX_BOOTMEM_H */