Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
[pandora-kernel.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 unsigned long bootmem_bootmap_pages(unsigned long);
42 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
43 extern void free_bootmem(unsigned long addr, unsigned long size);
44 extern void *__alloc_bootmem(unsigned long size,
45                              unsigned long align,
46                              unsigned long goal);
47 extern void *__alloc_bootmem_nopanic(unsigned long size,
48                                      unsigned long align,
49                                      unsigned long goal);
50 extern void *__alloc_bootmem_low(unsigned long size,
51                                  unsigned long align,
52                                  unsigned long goal);
53 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
54                                       unsigned long size,
55                                       unsigned long align,
56                                       unsigned long goal);
57 extern void *__alloc_bootmem_core(struct bootmem_data *bdata,
58                                   unsigned long size,
59                                   unsigned long align,
60                                   unsigned long goal,
61                                   unsigned long limit);
62 extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size);
63
64 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
65 extern void reserve_bootmem(unsigned long addr, unsigned long size);
66 #define alloc_bootmem(x) \
67         __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
68 #define alloc_bootmem_low(x) \
69         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
70 #define alloc_bootmem_pages(x) \
71         __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
72 #define alloc_bootmem_low_pages(x) \
73         __alloc_bootmem_low(x, PAGE_SIZE, 0)
74 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
75
76 extern unsigned long free_all_bootmem(void);
77 extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
78 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
79                                   unsigned long size,
80                                   unsigned long align,
81                                   unsigned long goal);
82 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
83                                        unsigned long freepfn,
84                                        unsigned long startpfn,
85                                        unsigned long endpfn);
86 extern void reserve_bootmem_node(pg_data_t *pgdat,
87                                  unsigned long physaddr,
88                                  unsigned long size);
89 extern void free_bootmem_node(pg_data_t *pgdat,
90                               unsigned long addr,
91                               unsigned long size);
92
93 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
94 #define alloc_bootmem_node(pgdat, x) \
95         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
96 #define alloc_bootmem_pages_node(pgdat, x) \
97         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
98 #define alloc_bootmem_low_pages_node(pgdat, x) \
99         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
100 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
101
102 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
103 extern void *alloc_remap(int nid, unsigned long size);
104 #else
105 static inline void *alloc_remap(int nid, unsigned long size)
106 {
107         return NULL;
108 }
109 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
110
111 extern unsigned long __meminitdata nr_kernel_pages;
112 extern unsigned long __meminitdata nr_all_pages;
113
114 extern void *alloc_large_system_hash(const char *tablename,
115                                      unsigned long bucketsize,
116                                      unsigned long numentries,
117                                      int scale,
118                                      int flags,
119                                      unsigned int *_hash_shift,
120                                      unsigned int *_hash_mask,
121                                      unsigned long limit);
122
123 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
124
125 /* Only NUMA needs hash distribution.
126  * IA64 and x86_64 have sufficient vmalloc space.
127  */
128 #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
129 #define HASHDIST_DEFAULT 1
130 #else
131 #define HASHDIST_DEFAULT 0
132 #endif
133 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
134
135
136 #endif /* _LINUX_BOOTMEM_H */