Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 <asm/pgtable.h>
8#include <asm/dma.h>
9#include <linux/cache.h>
10#include <linux/init.h>
11#include <linux/mmzone.h>
12
13/*
14 * simple boot-time physical memory area allocator.
15 */
16
17extern unsigned long max_low_pfn;
18extern unsigned long min_low_pfn;
19
20/*
21 * highest page
22 */
23extern unsigned long max_pfn;
24
25#ifdef CONFIG_CRASH_DUMP
26extern unsigned long saved_max_pfn;
27#endif
28
29/*
30 * node_bootmem_map is a map pointer - the bits represent all physical
31 * memory pages (including holes) on the node.
32 */
33typedef struct bootmem_data {
34 unsigned long node_boot_start;
35 unsigned long node_low_pfn;
36 void *node_bootmem_map;
37 unsigned long last_offset;
38 unsigned long last_pos;
39 unsigned long last_success; /* Previous allocation point. To speed
40 * up searching */
41 struct list_head list;
42} bootmem_data_t;
43
44extern unsigned long __init bootmem_bootmap_pages (unsigned long);
45extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
46extern void __init free_bootmem (unsigned long addr, unsigned long size);
47extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
48extern void * __init __alloc_bootmem_nopanic (unsigned long size, unsigned long align, unsigned long goal);
49extern void * __init __alloc_bootmem_low(unsigned long size,
50 unsigned long align,
51 unsigned long goal);
52extern void * __init __alloc_bootmem_low_node(pg_data_t *pgdat,
53 unsigned long size,
54 unsigned long align,
55 unsigned long goal);
56extern void * __init __alloc_bootmem_core(struct bootmem_data *bdata,
57 unsigned long size, unsigned long align, unsigned long goal,
58 unsigned long limit);
59#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
60extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
61#define alloc_bootmem(x) \
62 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
63#define alloc_bootmem_low(x) \
64 __alloc_bootmem_low((x), SMP_CACHE_BYTES, 0)
65#define alloc_bootmem_pages(x) \
66 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
67#define alloc_bootmem_low_pages(x) \
68 __alloc_bootmem_low((x), PAGE_SIZE, 0)
69#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
70extern unsigned long __init free_all_bootmem (void);
71extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
72extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
73extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
74extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
75extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
76#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
77#define alloc_bootmem_node(pgdat, x) \
78 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
79#define alloc_bootmem_pages_node(pgdat, x) \
80 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
81#define alloc_bootmem_low_pages_node(pgdat, x) \
82 __alloc_bootmem_low_node((pgdat), (x), PAGE_SIZE, 0)
83#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
84
85#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
86extern void *alloc_remap(int nid, unsigned long size);
87#else
88static inline void *alloc_remap(int nid, unsigned long size)
89{
90 return NULL;
91}
92#endif
93
94extern unsigned long __meminitdata nr_kernel_pages;
95extern unsigned long nr_all_pages;
96
97extern void *__init alloc_large_system_hash(const char *tablename,
98 unsigned long bucketsize,
99 unsigned long numentries,
100 int scale,
101 int flags,
102 unsigned int *_hash_shift,
103 unsigned int *_hash_mask,
104 unsigned long limit);
105
106#define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
107#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
108
109/* Only NUMA needs hash distribution.
110 * IA64 is known to have sufficient vmalloc space.
111 */
112#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
113#define HASHDIST_DEFAULT 1
114#else
115#define HASHDIST_DEFAULT 0
116#endif
117extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
118
119
120#endif /* _LINUX_BOOTMEM_H */