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 <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} bootmem_data_t;
42
43extern unsigned long __init bootmem_bootmap_pages (unsigned long);
44extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
45extern void __init free_bootmem (unsigned long addr, unsigned long size);
46extern void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
47#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
48extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
49#define alloc_bootmem(x) \
50 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
51#define alloc_bootmem_low(x) \
52 __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
53#define alloc_bootmem_pages(x) \
54 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
55#define alloc_bootmem_low_pages(x) \
56 __alloc_bootmem((x), PAGE_SIZE, 0)
57
58#define alloc_bootmem_limit(x, limit) \
59 __alloc_bootmem_limit((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
60#define alloc_bootmem_low_limit(x, limit) \
61 __alloc_bootmem_limit((x), SMP_CACHE_BYTES, 0, (limit))
62#define alloc_bootmem_pages_limit(x, limit) \
63 __alloc_bootmem_limit((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
64#define alloc_bootmem_low_pages_limit(x, limit) \
65 __alloc_bootmem_limit((x), PAGE_SIZE, 0, (limit))
66
67#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
68extern unsigned long __init free_all_bootmem (void);
69
70extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
71extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
72extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
73extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
74extern void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
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_node((pgdat), (x), PAGE_SIZE, 0)
82
83#define alloc_bootmem_node_limit(pgdat, x, limit) \
84 __alloc_bootmem_node_limit((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
85#define alloc_bootmem_pages_node_limit(pgdat, x, limit) \
86 __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
87#define alloc_bootmem_low_pages_node_limit(pgdat, x, limit) \
88 __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, 0, (limit))
89
90#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
91
92#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
93extern void *alloc_remap(int nid, unsigned long size);
94#else
95static inline void *alloc_remap(int nid, unsigned long size)
96{
97 return NULL;
98}
99#endif
100
101extern unsigned long __initdata nr_kernel_pages;
102extern unsigned long __initdata nr_all_pages;
103
104extern void *__init alloc_large_system_hash(const char *tablename,
105 unsigned long bucketsize,
106 unsigned long numentries,
107 int scale,
108 int flags,
109 unsigned int *_hash_shift,
110 unsigned int *_hash_mask,
111 unsigned long limit);
112
113#define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
114#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
115
116/* Only NUMA needs hash distribution.
117 * IA64 is known to have sufficient vmalloc space.
118 */
119#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
120#define HASHDIST_DEFAULT 1
121#else
122#define HASHDIST_DEFAULT 0
123#endif
124extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
125
126static inline void *__alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
127{
128 return __alloc_bootmem_limit(size, align, goal, 0);
129}
130
131static inline void *__alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align,
132 unsigned long goal)
133{
134 return __alloc_bootmem_node_limit(pgdat, size, align, goal, 0);
135}
136
137#endif /* _LINUX_BOOTMEM_H */