[NET]: Inline net_device_stats
[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 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
63 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
64 extern void reserve_bootmem(unsigned long addr, unsigned long size);
65 #define alloc_bootmem(x) \
66         __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
67 #define alloc_bootmem_low(x) \
68         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
69 #define alloc_bootmem_pages(x) \
70         __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
71 #define alloc_bootmem_low_pages(x) \
72         __alloc_bootmem_low(x, PAGE_SIZE, 0)
73 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
74
75 extern unsigned long free_all_bootmem(void);
76 extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
77 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
78                                   unsigned long size,
79                                   unsigned long align,
80                                   unsigned long goal);
81 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
82                                        unsigned long freepfn,
83                                        unsigned long startpfn,
84                                        unsigned long endpfn);
85 extern void reserve_bootmem_node(pg_data_t *pgdat,
86                                  unsigned long physaddr,
87                                  unsigned long size);
88 extern void free_bootmem_node(pg_data_t *pgdat,
89                               unsigned long addr,
90                               unsigned long size);
91
92 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
93 #define alloc_bootmem_node(pgdat, x) \
94         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
95 #define alloc_bootmem_pages_node(pgdat, x) \
96         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
97 #define alloc_bootmem_low_pages_node(pgdat, x) \
98         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
99 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
100
101 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
102 extern void *alloc_remap(int nid, unsigned long size);
103 #else
104 static inline void *alloc_remap(int nid, unsigned long size)
105 {
106         return NULL;
107 }
108 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
109
110 extern unsigned long __meminitdata nr_kernel_pages;
111 extern unsigned long __meminitdata nr_all_pages;
112
113 extern void *alloc_large_system_hash(const char *tablename,
114                                      unsigned long bucketsize,
115                                      unsigned long numentries,
116                                      int scale,
117                                      int flags,
118                                      unsigned int *_hash_shift,
119                                      unsigned int *_hash_mask,
120                                      unsigned long limit);
121
122 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
123
124 /* Only NUMA needs hash distribution.
125  * IA64 is known to have sufficient vmalloc space.
126  */
127 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
128 #define HASHDIST_DEFAULT 1
129 #else
130 #define HASHDIST_DEFAULT 0
131 #endif
132 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
133
134
135 #endif /* _LINUX_BOOTMEM_H */