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_all_bootmem(void);
48extern void reset_all_zones_managed_pages(void);
49
50extern void free_bootmem_node(pg_data_t *pgdat,
51 unsigned long addr,
52 unsigned long size);
53extern void free_bootmem(unsigned long physaddr, unsigned long size);
54extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
55extern 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
68extern int reserve_bootmem(unsigned long addr,
69 unsigned long size,
70 int flags);
71extern int reserve_bootmem_node(pg_data_t *pgdat,
72 unsigned long physaddr,
73 unsigned long size,
74 int flags);
75
76extern void *__alloc_bootmem(unsigned long size,
77 unsigned long align,
78 unsigned long goal);
79extern void *__alloc_bootmem_nopanic(unsigned long size,
80 unsigned long align,
81 unsigned long goal);
82extern void *__alloc_bootmem_node(pg_data_t *pgdat,
83 unsigned long size,
84 unsigned long align,
85 unsigned long goal);
86void *__alloc_bootmem_node_high(pg_data_t *pgdat,
87 unsigned long size,
88 unsigned long align,
89 unsigned long goal);
90extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
91 unsigned long size,
92 unsigned long align,
93 unsigned long goal);
94void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
95 unsigned long size,
96 unsigned long align,
97 unsigned long goal,
98 unsigned long limit);
99extern void *__alloc_bootmem_low(unsigned long size,
100 unsigned long align,
101 unsigned long goal);
102void *__alloc_bootmem_low_nopanic(unsigned long size,
103 unsigned long align,
104 unsigned long goal);
105extern 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
146extern void *alloc_remap(int nid, unsigned long size);
147#else
148static inline void *alloc_remap(int nid, unsigned long size)
149{
150 return NULL;
151}
152#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
153
154extern 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
176extern int hashdist; /* Distribute hashes across NUMA nodes? */
177
178
179#endif /* _LINUX_BOOTMEM_H */