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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
3 */
4#ifndef _LINUX_BOOTMEM_H
5#define _LINUX_BOOTMEM_H
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/mmzone.h>
Franck Bui-Huue786e862006-09-25 23:31:06 -07008#include <asm/dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
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
Vivek Goyal92aa63a2005-06-25 14:58:18 -070022#ifdef CONFIG_CRASH_DUMP
23extern unsigned long saved_max_pfn;
24#endif
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026/*
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 {
Johannes Weiner3560e242008-07-23 21:28:09 -070031 unsigned long node_min_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 unsigned long node_low_pfn;
33 void *node_bootmem_map;
Johannes Weiner5f2809e2008-07-23 21:28:05 -070034 unsigned long last_end_off;
35 unsigned long hint_idx;
KAMEZAWA Hiroyuki679bc9f2006-03-27 01:15:58 -080036 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037} bootmem_data_t;
38
Johannes Weinerb61bfa32008-07-23 21:26:55 -070039extern bootmem_data_t bootmem_node_data[];
40
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070041extern unsigned long bootmem_bootmap_pages(unsigned long);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070042
43extern unsigned long init_bootmem_node(pg_data_t *pgdat,
44 unsigned long freepfn,
45 unsigned long startpfn,
46 unsigned long endpfn);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070047extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070048
49extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
50extern unsigned long free_all_bootmem(void);
51
52extern void free_bootmem_node(pg_data_t *pgdat,
53 unsigned long addr,
54 unsigned long size);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070055extern void free_bootmem(unsigned long addr, unsigned long size);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070056
57/*
58 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
59 * the architecture-specific code should honor this).
60 *
61 * If flags is 0, then the return value is always 0 (success). If
62 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
63 * memory already was reserved.
64 */
65#define BOOTMEM_DEFAULT 0
66#define BOOTMEM_EXCLUSIVE (1<<0)
67
68extern int reserve_bootmem_node(pg_data_t *pgdat,
69 unsigned long physaddr,
70 unsigned long size,
71 int flags);
72#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
73extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
74#endif
75
76extern void *__alloc_bootmem_nopanic(unsigned long size,
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070077 unsigned long align,
78 unsigned long goal);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070079extern void *__alloc_bootmem(unsigned long size,
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070080 unsigned long align,
81 unsigned long goal);
82extern void *__alloc_bootmem_low(unsigned long size,
83 unsigned long align,
84 unsigned long goal);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070085extern void *__alloc_bootmem_node(pg_data_t *pgdat,
86 unsigned long size,
87 unsigned long align,
88 unsigned long goal);
89extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
90 unsigned long size,
91 unsigned long align,
92 unsigned long goal);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070093extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
94 unsigned long size,
95 unsigned long align,
96 unsigned long goal);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
Linus Torvalds1da177e2005-04-16 15:20:36 -070098#define alloc_bootmem(x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -070099 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
Jan Beulich74768ed2008-08-12 15:08:39 -0700100#define alloc_bootmem_nopanic(x) \
101 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#define alloc_bootmem_low(x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700103 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104#define alloc_bootmem_pages(x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700105 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
Jan Beulich74768ed2008-08-12 15:08:39 -0700106#define alloc_bootmem_pages_nopanic(x) \
107 __alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108#define alloc_bootmem_low_pages(x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700109 __alloc_bootmem_low(x, PAGE_SIZE, 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110#define alloc_bootmem_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700111 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112#define alloc_bootmem_pages_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700113 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114#define alloc_bootmem_low_pages_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700115 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
Johannes Weinerc6af5e92008-07-25 15:48:04 +0200116#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
117
118extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
119 int flags);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700120
121extern void *alloc_bootmem_section(unsigned long size,
122 unsigned long section_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Dave Hansen6f167ec2005-06-23 00:07:39 -0700124#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
125extern void *alloc_remap(int nid, unsigned long size);
126#else
127static inline void *alloc_remap(int nid, unsigned long size)
128{
129 return NULL;
130}
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700131#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
Dave Hansen6f167ec2005-06-23 00:07:39 -0700132
David Howells9dec17e2006-07-10 04:44:51 -0700133extern unsigned long __meminitdata nr_kernel_pages;
David Howells8da38d72007-03-22 00:11:22 -0800134extern unsigned long __meminitdata nr_all_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700136extern void *alloc_large_system_hash(const char *tablename,
137 unsigned long bucketsize,
138 unsigned long numentries,
139 int scale,
140 int flags,
141 unsigned int *_hash_shift,
142 unsigned int *_hash_mask,
143 unsigned long limit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Andrew Morton04903662006-12-06 20:37:33 -0800145#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147/* Only NUMA needs hash distribution.
Ravikiran G Thirumalaie073ae12007-05-02 19:27:08 +0200148 * IA64 and x86_64 have sufficient vmalloc space.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 */
Ravikiran G Thirumalaie073ae12007-05-02 19:27:08 +0200150#if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151#define HASHDIST_DEFAULT 1
152#else
153#define HASHDIST_DEFAULT 0
154#endif
David S. Millerf034b5d2006-08-24 03:08:07 -0700155extern int hashdist; /* Distribute hashes across NUMA nodes? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158#endif /* _LINUX_BOOTMEM_H */