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 extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
48 extern unsigned long free_all_bootmem(void);
49
50 extern void free_bootmem_node(pg_data_t *pgdat,
51 unsigned long addr,
52 unsigned long size);
53 extern void free_bootmem(unsigned long physaddr, unsigned long size);
54 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
55 extern void __free_pages_bootmem(struct page *page, unsigned int order);
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 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
95 unsigned long size,
96 unsigned long align,
97 unsigned long goal,
98 unsigned long limit);
99 extern void *__alloc_bootmem_low(unsigned long size,
100 unsigned long align,
101 unsigned long goal);
102 void *__alloc_bootmem_low_nopanic(unsigned long size,
103 unsigned long align,
104 unsigned long goal);
105 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
106 unsigned long size,
107 unsigned long align,
108 unsigned long goal);
109
110 #ifdef CONFIG_NO_BOOTMEM
111 /* We are using top down, so it is safe to use 0 here */
112 #define BOOTMEM_LOW_LIMIT 0
113 #else
114 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
115 #endif
116
117 #define alloc_bootmem(x) \
118 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
119 #define alloc_bootmem_align(x, align) \
120 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
121 #define alloc_bootmem_nopanic(x) \
122 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
123 #define alloc_bootmem_pages(x) \
124 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
125 #define alloc_bootmem_pages_nopanic(x) \
126 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
127 #define alloc_bootmem_node(pgdat, x) \
128 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
129 #define alloc_bootmem_node_nopanic(pgdat, x) \
130 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
131 #define alloc_bootmem_pages_node(pgdat, x) \
132 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
133 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
134 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
135
136 #define alloc_bootmem_low(x) \
137 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
138 #define alloc_bootmem_low_pages_nopanic(x) \
139 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
140 #define alloc_bootmem_low_pages(x) \
141 __alloc_bootmem_low(x, PAGE_SIZE, 0)
142 #define alloc_bootmem_low_pages_node(pgdat, x) \
143 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
144
145 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
146 extern void *alloc_remap(int nid, unsigned long size);
147 #else
alloc_remap(int nid,unsigned long size)148 static inline void *alloc_remap(int nid, unsigned long size)
149 {
150 return NULL;
151 }
152 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
153
154 extern void *alloc_large_system_hash(const char *tablename,
155 unsigned long bucketsize,
156 unsigned long numentries,
157 int scale,
158 int flags,
159 unsigned int *_hash_shift,
160 unsigned int *_hash_mask,
161 unsigned long low_limit,
162 unsigned long high_limit);
163
164 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
165 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
166 * shift passed via *_hash_shift */
167
168 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
169 * sufficient vmalloc space.
170 */
171 #if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
172 #define HASHDIST_DEFAULT 1
173 #else
174 #define HASHDIST_DEFAULT 0
175 #endif
176 extern int hashdist; /* Distribute hashes across NUMA nodes? */
177
178
179 #endif /* _LINUX_BOOTMEM_H */
180