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 addr, unsigned long size);
55extern void free_bootmem_late(unsigned long addr, unsigned long size);
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);
94extern void *__alloc_bootmem_low(unsigned long size,
95 unsigned long align,
96 unsigned long goal);
97extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
98 unsigned long size,
99 unsigned long align,
100 unsigned long goal);
101
102#ifdef CONFIG_NO_BOOTMEM
103/* We are using top down, so it is safe to use 0 here */
104#define BOOTMEM_LOW_LIMIT 0
105#else
106#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
107#endif
108
109#define alloc_bootmem(x) \
110 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
111#define alloc_bootmem_align(x, align) \
112 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
113#define alloc_bootmem_nopanic(x) \
114 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
115#define alloc_bootmem_pages(x) \
116 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
117#define alloc_bootmem_pages_nopanic(x) \
118 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
119#define alloc_bootmem_node(pgdat, x) \
120 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
121#define alloc_bootmem_node_nopanic(pgdat, x) \
122 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
123#define alloc_bootmem_pages_node(pgdat, x) \
124 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
125#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
126 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
127
128#define alloc_bootmem_low(x) \
129 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
130#define alloc_bootmem_low_pages(x) \
131 __alloc_bootmem_low(x, PAGE_SIZE, 0)
132#define alloc_bootmem_low_pages_node(pgdat, x) \
133 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
134
135extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
136 int flags);
137
138#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
139extern void *alloc_remap(int nid, unsigned long size);
140#else
141static inline void *alloc_remap(int nid, unsigned long size)
142{
143 return NULL;
144}
145#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
146
147extern void *alloc_large_system_hash(const char *tablename,
148 unsigned long bucketsize,
149 unsigned long numentries,
150 int scale,
151 int flags,
152 unsigned int *_hash_shift,
153 unsigned int *_hash_mask,
154 unsigned long low_limit,
155 unsigned long high_limit);
156
157#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
158#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
159 * shift passed via *_hash_shift */
160
161/* Only NUMA needs hash distribution. 64bit NUMA architectures have
162 * sufficient vmalloc space.
163 */
164#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
165#define HASHDIST_DEFAULT 1
166#else
167#define HASHDIST_DEFAULT 0
168#endif
169extern int hashdist; /* Distribute hashes across NUMA nodes? */
170
171
172#endif /* _LINUX_BOOTMEM_H */