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);
62extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size);
63
64#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
65extern void reserve_bootmem(unsigned long addr, unsigned long size);
66#define alloc_bootmem(x) \
67 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
68#define alloc_bootmem_low(x) \
69 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
70#define alloc_bootmem_pages(x) \
71 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
72#define alloc_bootmem_low_pages(x) \
73 __alloc_bootmem_low(x, PAGE_SIZE, 0)
74#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
75
76extern unsigned long free_all_bootmem(void);
77extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
78extern void *__alloc_bootmem_node(pg_data_t *pgdat,
79 unsigned long size,
80 unsigned long align,
81 unsigned long goal);
82extern unsigned long init_bootmem_node(pg_data_t *pgdat,
83 unsigned long freepfn,
84 unsigned long startpfn,
85 unsigned long endpfn);
86extern void reserve_bootmem_node(pg_data_t *pgdat,
87 unsigned long physaddr,
88 unsigned long size);
89extern void free_bootmem_node(pg_data_t *pgdat,
90 unsigned long addr,
91 unsigned long size);
92
93#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
94#define alloc_bootmem_node(pgdat, x) \
95 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
96#define alloc_bootmem_pages_node(pgdat, x) \
97 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
98#define alloc_bootmem_low_pages_node(pgdat, x) \
99 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
100#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
101
102#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
103extern void *alloc_remap(int nid, unsigned long size);
104#else
105static inline void *alloc_remap(int nid, unsigned long size)
106{
107 return NULL;
108}
109#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
110
111extern unsigned long __meminitdata nr_kernel_pages;
112extern unsigned long __meminitdata nr_all_pages;
113
114extern void *alloc_large_system_hash(const char *tablename,
115 unsigned long bucketsize,
116 unsigned long numentries,
117 int scale,
118 int flags,
119 unsigned int *_hash_shift,
120 unsigned int *_hash_mask,
121 unsigned long limit);
122
123#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
124
125/* Only NUMA needs hash distribution.
126 * IA64 and x86_64 have sufficient vmalloc space.
127 */
128#if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
129#define HASHDIST_DEFAULT 1
130#else
131#define HASHDIST_DEFAULT 0
132#endif
133extern int hashdist; /* Distribute hashes across NUMA nodes? */
134
135
136#endif /* _LINUX_BOOTMEM_H */