x86: Make 64 bit use early_res instead of bootmem before slab
[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 #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_nopanic(x) \
109         __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
110 #define alloc_bootmem_pages(x) \
111         __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
112 #define alloc_bootmem_pages_nopanic(x) \
113         __alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
114 #define alloc_bootmem_node(pgdat, x) \
115         __alloc_bootmem_node(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 */