power: tps80031: battery-charger: register as mfd sub device
[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 #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 #ifdef CONFIG_NO_BOOTMEM
103 /* We are using top down, so it is safe to use 0 here */
104 #define BOOTMEM_LOW_LIMIT 0
105 #else
106 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
107 #endif
108
109 #define alloc_bootmem(x) \
110         __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
111 #define alloc_bootmem_align(x, align) \
112         __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
113 #define alloc_bootmem_nopanic(x) \
114         __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
115 #define alloc_bootmem_pages(x) \
116         __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
117 #define alloc_bootmem_pages_nopanic(x) \
118         __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
119 #define alloc_bootmem_node(pgdat, x) \
120         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
121 #define alloc_bootmem_node_nopanic(pgdat, x) \
122         __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
123 #define alloc_bootmem_pages_node(pgdat, x) \
124         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
125 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
126         __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
127
128 #define alloc_bootmem_low(x) \
129         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
130 #define alloc_bootmem_low_pages(x) \
131         __alloc_bootmem_low(x, PAGE_SIZE, 0)
132 #define alloc_bootmem_low_pages_node(pgdat, x) \
133         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
134
135 extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
136                                    int flags);
137
138 extern void *alloc_bootmem_section(unsigned long size,
139                                    unsigned long section_nr);
140
141 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
142 extern void *alloc_remap(int nid, unsigned long size);
143 #else
144 static inline void *alloc_remap(int nid, unsigned long size)
145 {
146         return NULL;
147 }
148 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
149
150 extern void *alloc_large_system_hash(const char *tablename,
151                                      unsigned long bucketsize,
152                                      unsigned long numentries,
153                                      int scale,
154                                      int flags,
155                                      unsigned int *_hash_shift,
156                                      unsigned int *_hash_mask,
157                                      unsigned long limit);
158
159 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
160 #define HASH_SMALL      0x00000002      /* sub-page allocation allowed, min
161                                          * shift passed via *_hash_shift */
162
163 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
164  * sufficient vmalloc space.
165  */
166 #if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
167 #define HASHDIST_DEFAULT 1
168 #else
169 #define HASHDIST_DEFAULT 0
170 #endif
171 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
172
173
174 #endif /* _LINUX_BOOTMEM_H */