Linux kernel mirror (for testing)
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linux
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
14extern unsigned long max_low_pfn;
15extern unsigned long min_low_pfn;
16
17/*
18 * highest page
19 */
20extern 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 */
27typedef 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
36extern bootmem_data_t bootmem_node_data[];
37#endif
38
39extern unsigned long bootmem_bootmap_pages(unsigned long);
40
41extern unsigned long init_bootmem_node(pg_data_t *pgdat,
42 unsigned long freepfn,
43 unsigned long startpfn,
44 unsigned long endpfn);
45extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
46
47extern unsigned long free_low_memory_core_early(int nodeid);
48extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
49extern unsigned long free_all_bootmem(void);
50
51extern void free_bootmem_node(pg_data_t *pgdat,
52 unsigned long addr,
53 unsigned long size);
54extern void free_bootmem(unsigned long physaddr, unsigned long size);
55extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
56extern void __free_pages_bootmem(struct page *page, unsigned int order);
57
58/*
59 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
60 * the architecture-specific code should honor this).
61 *
62 * If flags is 0, then the return value is always 0 (success). If
63 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
64 * memory already was reserved.
65 */
66#define BOOTMEM_DEFAULT 0
67#define BOOTMEM_EXCLUSIVE (1<<0)
68
69extern int reserve_bootmem(unsigned long addr,
70 unsigned long size,
71 int flags);
72extern int reserve_bootmem_node(pg_data_t *pgdat,
73 unsigned long physaddr,
74 unsigned long size,
75 int flags);
76
77extern void *__alloc_bootmem(unsigned long size,
78 unsigned long align,
79 unsigned long goal);
80extern void *__alloc_bootmem_nopanic(unsigned long size,
81 unsigned long align,
82 unsigned long goal);
83extern void *__alloc_bootmem_node(pg_data_t *pgdat,
84 unsigned long size,
85 unsigned long align,
86 unsigned long goal);
87void *__alloc_bootmem_node_high(pg_data_t *pgdat,
88 unsigned long size,
89 unsigned long align,
90 unsigned long goal);
91extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
92 unsigned long size,
93 unsigned long align,
94 unsigned long goal);
95void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
96 unsigned long size,
97 unsigned long align,
98 unsigned long goal,
99 unsigned long limit);
100extern void *__alloc_bootmem_low(unsigned long size,
101 unsigned long align,
102 unsigned long goal);
103void *__alloc_bootmem_low_nopanic(unsigned long size,
104 unsigned long align,
105 unsigned long goal);
106extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
107 unsigned long size,
108 unsigned long align,
109 unsigned long goal);
110
111#ifdef CONFIG_NO_BOOTMEM
112/* We are using top down, so it is safe to use 0 here */
113#define BOOTMEM_LOW_LIMIT 0
114#else
115#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
116#endif
117
118#define alloc_bootmem(x) \
119 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
120#define alloc_bootmem_align(x, align) \
121 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
122#define alloc_bootmem_nopanic(x) \
123 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
124#define alloc_bootmem_pages(x) \
125 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
126#define alloc_bootmem_pages_nopanic(x) \
127 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
128#define alloc_bootmem_node(pgdat, x) \
129 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
130#define alloc_bootmem_node_nopanic(pgdat, x) \
131 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
132#define alloc_bootmem_pages_node(pgdat, x) \
133 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
134#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
135 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
136
137#define alloc_bootmem_low(x) \
138 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
139#define alloc_bootmem_low_pages_nopanic(x) \
140 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
141#define alloc_bootmem_low_pages(x) \
142 __alloc_bootmem_low(x, PAGE_SIZE, 0)
143#define alloc_bootmem_low_pages_node(pgdat, x) \
144 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
145
146#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
147extern void *alloc_remap(int nid, unsigned long size);
148#else
149static inline void *alloc_remap(int nid, unsigned long size)
150{
151 return NULL;
152}
153#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
154
155extern void *alloc_large_system_hash(const char *tablename,
156 unsigned long bucketsize,
157 unsigned long numentries,
158 int scale,
159 int flags,
160 unsigned int *_hash_shift,
161 unsigned int *_hash_mask,
162 unsigned long low_limit,
163 unsigned long high_limit);
164
165#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
166#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
167 * shift passed via *_hash_shift */
168
169/* Only NUMA needs hash distribution. 64bit NUMA architectures have
170 * sufficient vmalloc space.
171 */
172#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
173#define HASHDIST_DEFAULT 1
174#else
175#define HASHDIST_DEFAULT 0
176#endif
177extern int hashdist; /* Distribute hashes across NUMA nodes? */
178
179
180#endif /* _LINUX_BOOTMEM_H */