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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 | |
3 | */ | |
4 | #ifndef _LINUX_BOOTMEM_H | |
5 | #define _LINUX_BOOTMEM_H | |
6 | ||
7 | #include <asm/pgtable.h> | |
8 | #include <asm/dma.h> | |
9 | #include <linux/cache.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/mmzone.h> | |
12 | ||
13 | /* | |
14 | * simple boot-time physical memory area allocator. | |
15 | */ | |
16 | ||
17 | extern unsigned long max_low_pfn; | |
18 | extern unsigned long min_low_pfn; | |
19 | ||
20 | /* | |
21 | * highest page | |
22 | */ | |
23 | extern unsigned long max_pfn; | |
24 | ||
92aa63a5 VG |
25 | #ifdef CONFIG_CRASH_DUMP |
26 | extern unsigned long saved_max_pfn; | |
27 | #endif | |
28 | ||
1da177e4 LT |
29 | /* |
30 | * node_bootmem_map is a map pointer - the bits represent all physical | |
31 | * memory pages (including holes) on the node. | |
32 | */ | |
33 | typedef struct bootmem_data { | |
34 | unsigned long node_boot_start; | |
35 | unsigned long node_low_pfn; | |
36 | void *node_bootmem_map; | |
37 | unsigned long last_offset; | |
38 | unsigned long last_pos; | |
39 | unsigned long last_success; /* Previous allocation point. To speed | |
40 | * up searching */ | |
679bc9fb | 41 | struct list_head list; |
1da177e4 LT |
42 | } bootmem_data_t; |
43 | ||
2d1a07d4 FBH |
44 | extern unsigned long bootmem_bootmap_pages (unsigned long); |
45 | extern unsigned long init_bootmem (unsigned long addr, unsigned long memend); | |
46 | extern void free_bootmem (unsigned long addr, unsigned long size); | |
47 | extern void * __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal); | |
48 | extern void * __alloc_bootmem_nopanic (unsigned long size, unsigned long align, unsigned long goal); | |
49 | extern void * __alloc_bootmem_low(unsigned long size, | |
008857c1 RT |
50 | unsigned long align, |
51 | unsigned long goal); | |
2d1a07d4 | 52 | extern void * __alloc_bootmem_low_node(pg_data_t *pgdat, |
008857c1 RT |
53 | unsigned long size, |
54 | unsigned long align, | |
55 | unsigned long goal); | |
2d1a07d4 | 56 | extern void * __alloc_bootmem_core(struct bootmem_data *bdata, |
267b4801 AK |
57 | unsigned long size, unsigned long align, unsigned long goal, |
58 | unsigned long limit); | |
1da177e4 | 59 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
2d1a07d4 | 60 | extern void reserve_bootmem (unsigned long addr, unsigned long size); |
1da177e4 LT |
61 | #define alloc_bootmem(x) \ |
62 | __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) | |
63 | #define alloc_bootmem_low(x) \ | |
008857c1 | 64 | __alloc_bootmem_low((x), SMP_CACHE_BYTES, 0) |
1da177e4 LT |
65 | #define alloc_bootmem_pages(x) \ |
66 | __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) | |
67 | #define alloc_bootmem_low_pages(x) \ | |
008857c1 | 68 | __alloc_bootmem_low((x), PAGE_SIZE, 0) |
1da177e4 | 69 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
2d1a07d4 FBH |
70 | extern unsigned long free_all_bootmem (void); |
71 | extern void * __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal); | |
72 | extern unsigned long init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn); | |
73 | extern void reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size); | |
74 | extern void free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size); | |
75 | extern unsigned long free_all_bootmem_node (pg_data_t *pgdat); | |
1da177e4 LT |
76 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
77 | #define alloc_bootmem_node(pgdat, x) \ | |
78 | __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) | |
79 | #define alloc_bootmem_pages_node(pgdat, x) \ | |
80 | __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) | |
81 | #define alloc_bootmem_low_pages_node(pgdat, x) \ | |
008857c1 | 82 | __alloc_bootmem_low_node((pgdat), (x), PAGE_SIZE, 0) |
1da177e4 LT |
83 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
84 | ||
6f167ec7 DH |
85 | #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP |
86 | extern void *alloc_remap(int nid, unsigned long size); | |
87 | #else | |
88 | static inline void *alloc_remap(int nid, unsigned long size) | |
89 | { | |
90 | return NULL; | |
91 | } | |
92 | #endif | |
93 | ||
9dec17eb | 94 | extern unsigned long __meminitdata nr_kernel_pages; |
86356ab1 | 95 | extern unsigned long nr_all_pages; |
1da177e4 | 96 | |
2d1a07d4 FBH |
97 | extern void * alloc_large_system_hash(const char *tablename, |
98 | unsigned long bucketsize, | |
99 | unsigned long numentries, | |
100 | int scale, | |
101 | int flags, | |
102 | unsigned int *_hash_shift, | |
103 | unsigned int *_hash_mask, | |
104 | unsigned long limit); | |
1da177e4 LT |
105 | |
106 | #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */ | |
107 | #define HASH_EARLY 0x00000002 /* Allocating during early boot? */ | |
108 | ||
109 | /* Only NUMA needs hash distribution. | |
110 | * IA64 is known to have sufficient vmalloc space. | |
111 | */ | |
112 | #if defined(CONFIG_NUMA) && defined(CONFIG_IA64) | |
113 | #define HASHDIST_DEFAULT 1 | |
114 | #else | |
115 | #define HASHDIST_DEFAULT 0 | |
116 | #endif | |
f034b5d4 | 117 | extern int hashdist; /* Distribute hashes across NUMA nodes? */ |
1da177e4 LT |
118 | |
119 | ||
120 | #endif /* _LINUX_BOOTMEM_H */ |