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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
Yinghai Lu08677212010-02-10 01:20:20 -080022#ifndef CONFIG_NO_BOOTMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -070023/*
24 * node_bootmem_map is a map pointer - the bits represent all physical
25 * memory pages (including holes) on the node.
26 */
27typedef struct bootmem_data {
Johannes Weiner3560e242008-07-23 21:28:09 -070028 unsigned long node_min_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 unsigned long node_low_pfn;
30 void *node_bootmem_map;
Johannes Weiner5f2809e2008-07-23 21:28:05 -070031 unsigned long last_end_off;
32 unsigned long hint_idx;
KAMEZAWA Hiroyuki679bc9f2006-03-27 01:15:58 -080033 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034} bootmem_data_t;
35
Johannes Weinerb61bfa32008-07-23 21:26:55 -070036extern bootmem_data_t bootmem_node_data[];
Yinghai Lu08677212010-02-10 01:20:20 -080037#endif
Johannes Weinerb61bfa32008-07-23 21:26:55 -070038
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070039extern unsigned long bootmem_bootmap_pages(unsigned long);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070040
41extern unsigned long init_bootmem_node(pg_data_t *pgdat,
42 unsigned long freepfn,
43 unsigned long startpfn,
44 unsigned long endpfn);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070045extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070046
Tejun Heo64a02da2011-07-12 11:16:01 +020047extern unsigned long free_low_memory_core_early(int nodeid);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070048extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
49extern unsigned long free_all_bootmem(void);
50
51extern void free_bootmem_node(pg_data_t *pgdat,
52 unsigned long addr,
53 unsigned long size);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070054extern void free_bootmem(unsigned long addr, unsigned long size);
FUJITA Tomonori9f993ac2009-11-10 19:46:17 +090055extern void free_bootmem_late(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
Tejun Heoc1329372009-02-24 11:57:20 +090068extern int reserve_bootmem(unsigned long addr,
69 unsigned long size,
70 int flags);
Tejun Heo2d0aae42009-02-24 11:57:21 +090071extern int reserve_bootmem_node(pg_data_t *pgdat,
72 unsigned long physaddr,
73 unsigned long size,
74 int flags);
75
76extern void *__alloc_bootmem(unsigned long size,
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070077 unsigned long align,
78 unsigned long goal);
Tejun Heo2d0aae42009-02-24 11:57:21 +090079extern void *__alloc_bootmem_nopanic(unsigned long size,
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070080 unsigned long align,
81 unsigned long goal);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070082extern void *__alloc_bootmem_node(pg_data_t *pgdat,
83 unsigned long size,
84 unsigned long align,
85 unsigned long goal);
Yinghai Lu08677212010-02-10 01:20:20 -080086void *__alloc_bootmem_node_high(pg_data_t *pgdat,
87 unsigned long size,
88 unsigned long align,
89 unsigned long goal);
Johannes Weiner223e8dc2008-07-23 21:28:00 -070090extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
91 unsigned long size,
92 unsigned long align,
93 unsigned long goal);
Tejun Heo2d0aae42009-02-24 11:57:21 +090094extern void *__alloc_bootmem_low(unsigned long size,
95 unsigned long align,
96 unsigned long goal);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -070097extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
98 unsigned long size,
99 unsigned long align,
100 unsigned long goal);
Tejun Heoc1329372009-02-24 11:57:20 +0900101
Yinghai Lu8bba1542011-05-24 17:12:37 -0700102#ifdef CONFIG_NO_BOOTMEM
103/* We are using top down, so it is safe to use 0 here */
104#define BOOTMEM_LOW_LIMIT 0
105#else
106#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
107#endif
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109#define alloc_bootmem(x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700110 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
Suresh Siddha53dde5f2010-11-16 13:23:50 -0800111#define alloc_bootmem_align(x, align) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700112 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
Jan Beulich74768ed2008-08-12 15:08:39 -0700113#define alloc_bootmem_nopanic(x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700114 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115#define alloc_bootmem_pages(x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700116 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
Jan Beulich74768ed2008-08-12 15:08:39 -0700117#define alloc_bootmem_pages_nopanic(x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700118 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119#define alloc_bootmem_node(pgdat, x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700120 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
Yinghai Lu8f389a992011-05-11 15:13:32 -0700121#define alloc_bootmem_node_nopanic(pgdat, x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700122 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123#define alloc_bootmem_pages_node(pgdat, x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700124 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
Tejun Heo2d0aae42009-02-24 11:57:21 +0900125#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
Yinghai Lu8bba1542011-05-24 17:12:37 -0700126 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
Tejun Heo2d0aae42009-02-24 11:57:21 +0900127
128#define alloc_bootmem_low(x) \
129 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
130#define alloc_bootmem_low_pages(x) \
131 __alloc_bootmem_low(x, PAGE_SIZE, 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132#define alloc_bootmem_low_pages_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700133 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
Johannes Weinerc6af5e92008-07-25 15:48:04 +0200134
135extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
136 int flags);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700137
Dave Hansen6f167ec2005-06-23 00:07:39 -0700138#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
139extern void *alloc_remap(int nid, unsigned long size);
140#else
141static inline void *alloc_remap(int nid, unsigned long size)
142{
143 return NULL;
144}
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700145#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
Dave Hansen6f167ec2005-06-23 00:07:39 -0700146
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700147extern void *alloc_large_system_hash(const char *tablename,
148 unsigned long bucketsize,
149 unsigned long numentries,
150 int scale,
151 int flags,
152 unsigned int *_hash_shift,
153 unsigned int *_hash_mask,
Tim Bird31fe62b2012-05-23 13:33:35 +0000154 unsigned long low_limit,
155 unsigned long high_limit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Andrew Morton04903662006-12-06 20:37:33 -0800157#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
Jan Beulich2c85f512009-09-21 17:03:07 -0700158#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
159 * shift passed via *_hash_shift */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Anton Blanchardc2fdf3a2009-03-31 15:23:19 -0700161/* Only NUMA needs hash distribution. 64bit NUMA architectures have
162 * sufficient vmalloc space.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 */
Anton Blanchardc2fdf3a2009-03-31 15:23:19 -0700164#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165#define HASHDIST_DEFAULT 1
166#else
167#define HASHDIST_DEFAULT 0
168#endif
David S. Millerf034b5d2006-08-24 03:08:07 -0700169extern int hashdist; /* Distribute hashes across NUMA nodes? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
172#endif /* _LINUX_BOOTMEM_H */