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_low(unsigned long size,
49 unsigned long align,
50 unsigned long goal);
51extern void * __init __alloc_bootmem_low_node(pg_data_t *pgdat,
52 unsigned long size,
53 unsigned long align,
54 unsigned long goal);
55extern void * __init __alloc_bootmem_core(struct bootmem_data *bdata,
56 unsigned long size, unsigned long align, unsigned long goal,
57 unsigned long limit);
58#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
59extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
60#define alloc_bootmem(x) \
61 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
62#define alloc_bootmem_low(x) \
63 __alloc_bootmem_low((x), SMP_CACHE_BYTES, 0)
64#define alloc_bootmem_pages(x) \
65 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
66#define alloc_bootmem_low_pages(x) \
67 __alloc_bootmem_low((x), PAGE_SIZE, 0)
68#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
69extern unsigned long __init free_all_bootmem (void);
70extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
71extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
72extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
73extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
74extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
75#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
76#define alloc_bootmem_node(pgdat, x) \
77 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
78#define alloc_bootmem_pages_node(pgdat, x) \
79 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
80#define alloc_bootmem_low_pages_node(pgdat, x) \
81 __alloc_bootmem_low_node((pgdat), (x), PAGE_SIZE, 0)
82#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
83
84#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
85extern void *alloc_remap(int nid, unsigned long size);
86#else
87static inline void *alloc_remap(int nid, unsigned long size)
88{
89 return NULL;
90}
91#endif
92
93extern unsigned long __initdata nr_kernel_pages;
94extern unsigned long __initdata nr_all_pages;
95
96extern void *__init alloc_large_system_hash(const char *tablename,
97 unsigned long bucketsize,
98 unsigned long numentries,
99 int scale,
100 int flags,
101 unsigned int *_hash_shift,
102 unsigned int *_hash_mask,
103 unsigned long limit);
104
105#define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
106#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
107
108/* Only NUMA needs hash distribution.
109 * IA64 is known to have sufficient vmalloc space.
110 */
111#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
112#define HASHDIST_DEFAULT 1
113#else
114#define HASHDIST_DEFAULT 0
115#endif
116extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
117
118
119#endif /* _LINUX_BOOTMEM_H */