Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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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_boot_start;
32 unsigned long node_low_pfn;
33 void *node_bootmem_map;
34 unsigned long last_offset;
35 unsigned long last_pos;
36 unsigned long last_success; /* Previous allocation point. To speed
37 * up searching */
38 struct list_head list;
39} bootmem_data_t;
40
41extern unsigned long bootmem_bootmap_pages(unsigned long);
42extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
43extern void free_bootmem(unsigned long addr, unsigned long size);
44extern void *__alloc_bootmem(unsigned long size,
45 unsigned long align,
46 unsigned long goal);
47extern void *__alloc_bootmem_nopanic(unsigned long size,
48 unsigned long align,
49 unsigned long goal);
50extern void *__alloc_bootmem_low(unsigned long size,
51 unsigned long align,
52 unsigned long goal);
53extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
54 unsigned long size,
55 unsigned long align,
56 unsigned long goal);
57extern void *__alloc_bootmem_core(struct bootmem_data *bdata,
58 unsigned long size,
59 unsigned long align,
60 unsigned long goal,
61 unsigned long limit);
62
63#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
64extern void reserve_bootmem(unsigned long addr, unsigned long size);
65#define alloc_bootmem(x) \
66 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
67#define alloc_bootmem_low(x) \
68 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
69#define alloc_bootmem_pages(x) \
70 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
71#define alloc_bootmem_low_pages(x) \
72 __alloc_bootmem_low(x, PAGE_SIZE, 0)
73#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
74
75extern unsigned long free_all_bootmem(void);
76extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
77extern void *__alloc_bootmem_node(pg_data_t *pgdat,
78 unsigned long size,
79 unsigned long align,
80 unsigned long goal);
81extern unsigned long init_bootmem_node(pg_data_t *pgdat,
82 unsigned long freepfn,
83 unsigned long startpfn,
84 unsigned long endpfn);
85extern void reserve_bootmem_node(pg_data_t *pgdat,
86 unsigned long physaddr,
87 unsigned long size);
88extern void free_bootmem_node(pg_data_t *pgdat,
89 unsigned long addr,
90 unsigned long size);
91
92#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
93#define alloc_bootmem_node(pgdat, x) \
94 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
95#define alloc_bootmem_pages_node(pgdat, x) \
96 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
97#define alloc_bootmem_low_pages_node(pgdat, x) \
98 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
99#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
100
101#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
102extern void *alloc_remap(int nid, unsigned long size);
103#else
104static inline void *alloc_remap(int nid, unsigned long size)
105{
106 return NULL;
107}
108#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
109
110extern unsigned long __meminitdata nr_kernel_pages;
111extern unsigned long nr_all_pages;
112
113extern void *alloc_large_system_hash(const char *tablename,
114 unsigned long bucketsize,
115 unsigned long numentries,
116 int scale,
117 int flags,
118 unsigned int *_hash_shift,
119 unsigned int *_hash_mask,
120 unsigned long limit);
121
122#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
123
124/* Only NUMA needs hash distribution.
125 * IA64 is known to have sufficient vmalloc space.
126 */
127#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
128#define HASHDIST_DEFAULT 1
129#else
130#define HASHDIST_DEFAULT 0
131#endif
132extern int hashdist; /* Distribute hashes across NUMA nodes? */
133
134
135#endif /* _LINUX_BOOTMEM_H */