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#ifdef CONFIG_CRASH_DUMP
23extern unsigned long saved_max_pfn;
24#endif
25
26/*
27 * node_bootmem_map is a map pointer - the bits represent all physical
28 * memory pages (including holes) on the node.
29 */
30typedef struct bootmem_data {
31 unsigned long node_min_pfn;
32 unsigned long node_low_pfn;
33 void *node_bootmem_map;
34 unsigned long last_end_off;
35 unsigned long hint_idx;
36 struct list_head list;
37} bootmem_data_t;
38
39extern bootmem_data_t bootmem_node_data[];
40
41extern unsigned long bootmem_bootmap_pages(unsigned long);
42
43extern unsigned long init_bootmem_node(pg_data_t *pgdat,
44 unsigned long freepfn,
45 unsigned long startpfn,
46 unsigned long endpfn);
47extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
48
49extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
50extern unsigned long free_all_bootmem(void);
51
52extern void free_bootmem_node(pg_data_t *pgdat,
53 unsigned long addr,
54 unsigned long size);
55extern void free_bootmem(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);
86extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
87 unsigned long size,
88 unsigned long align,
89 unsigned long goal);
90extern void *__alloc_bootmem_low(unsigned long size,
91 unsigned long align,
92 unsigned long goal);
93extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
94 unsigned long size,
95 unsigned long align,
96 unsigned long goal);
97
98#define alloc_bootmem(x) \
99 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
100#define alloc_bootmem_nopanic(x) \
101 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
102#define alloc_bootmem_pages(x) \
103 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
104#define alloc_bootmem_pages_nopanic(x) \
105 __alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
106#define alloc_bootmem_node(pgdat, x) \
107 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
108#define alloc_bootmem_pages_node(pgdat, x) \
109 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
110#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
111 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
112
113#define alloc_bootmem_low(x) \
114 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
115#define alloc_bootmem_low_pages(x) \
116 __alloc_bootmem_low(x, PAGE_SIZE, 0)
117#define alloc_bootmem_low_pages_node(pgdat, x) \
118 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
119
120extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
121 int flags);
122
123extern void *alloc_bootmem_section(unsigned long size,
124 unsigned long section_nr);
125
126#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
127extern void *alloc_remap(int nid, unsigned long size);
128#else
129static inline void *alloc_remap(int nid, unsigned long size)
130{
131 return NULL;
132}
133#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
134
135extern unsigned long __meminitdata nr_kernel_pages;
136extern unsigned long __meminitdata nr_all_pages;
137
138extern void *alloc_large_system_hash(const char *tablename,
139 unsigned long bucketsize,
140 unsigned long numentries,
141 int scale,
142 int flags,
143 unsigned int *_hash_shift,
144 unsigned int *_hash_mask,
145 unsigned long limit);
146
147#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
148
149/* Only NUMA needs hash distribution. 64bit NUMA architectures have
150 * sufficient vmalloc space.
151 */
152#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
153#define HASHDIST_DEFAULT 1
154#else
155#define HASHDIST_DEFAULT 0
156#endif
157extern int hashdist; /* Distribute hashes across NUMA nodes? */
158
159
160#endif /* _LINUX_BOOTMEM_H */