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gerrit-public.fairphone.software / kernel / msm / 56e49d218890f49b0057710a4b6fef31f5ffbfec / . / include / linux / bootmem.h
blob: bc3ab70736955675afef688d4209c5bf8392b4b3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
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 -0700[diff] [blame]7#include <linux/mmzone.h>
Franck Bui-Huue786e862006-09-25 23:31:06 -0700[diff] [blame]8#include <asm/dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]9
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 -0700[diff] [blame]22#ifdef CONFIG_CRASH_DUMP
23extern unsigned long saved_max_pfn;
24#endif
25
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]26/*
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 -0700[diff] [blame]31 unsigned long node_min_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]32 unsigned long node_low_pfn;
33 void *node_bootmem_map;
Johannes Weiner5f2809e2008-07-23 21:28:05 -0700[diff] [blame]34 unsigned long last_end_off;
35 unsigned long hint_idx;
KAMEZAWA Hiroyuki679bc9f2006-03-27 01:15:58 -0800[diff] [blame]36 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]37} bootmem_data_t;
38
Johannes Weinerb61bfa32008-07-23 21:26:55 -0700[diff] [blame]39extern bootmem_data_t bootmem_node_data[];
40
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700[diff] [blame]41extern unsigned long bootmem_bootmap_pages(unsigned long);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700[diff] [blame]42
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 -0700[diff] [blame]47extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700[diff] [blame]48
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 -0700[diff] [blame]55extern void free_bootmem(unsigned long addr, unsigned long size);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700[diff] [blame]56
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 +0900[diff] [blame]68extern int reserve_bootmem(unsigned long addr,
69 unsigned long size,
70 int flags);
Tejun Heo2d0aae42009-02-24 11:57:21 +0900[diff] [blame]71extern 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 -0700[diff] [blame]77 unsigned long align,
78 unsigned long goal);
Tejun Heo2d0aae42009-02-24 11:57:21 +0900[diff] [blame]79extern void *__alloc_bootmem_nopanic(unsigned long size,
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700[diff] [blame]80 unsigned long align,
81 unsigned long goal);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700[diff] [blame]82extern void *__alloc_bootmem_node(pg_data_t *pgdat,
83 unsigned long size,
84 unsigned long align,
85 unsigned long goal);
86extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
87 unsigned long size,
88 unsigned long align,
89 unsigned long goal);
Tejun Heo2d0aae42009-02-24 11:57:21 +0900[diff] [blame]90extern void *__alloc_bootmem_low(unsigned long size,
91 unsigned long align,
92 unsigned long goal);
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700[diff] [blame]93extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
94 unsigned long size,
95 unsigned long align,
96 unsigned long goal);
Tejun Heoc1329372009-02-24 11:57:20 +0900[diff] [blame]97
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]98#define alloc_bootmem(x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700[diff] [blame]99 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
Jan Beulich74768ed2008-08-12 15:08:39 -0700[diff] [blame]100#define alloc_bootmem_nopanic(x) \
101 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]102#define alloc_bootmem_pages(x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700[diff] [blame]103 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
Jan Beulich74768ed2008-08-12 15:08:39 -0700[diff] [blame]104#define alloc_bootmem_pages_nopanic(x) \
105 __alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]106#define alloc_bootmem_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700[diff] [blame]107 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]108#define alloc_bootmem_pages_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700[diff] [blame]109 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
Tejun Heo2d0aae42009-02-24 11:57:21 +0900[diff] [blame]110#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
111 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
112
113#define alloc_bootmem_low(x) \
114 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
115#define alloc_bootmem_low_pages(x) \
116 __alloc_bootmem_low(x, PAGE_SIZE, 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]117#define alloc_bootmem_low_pages_node(pgdat, x) \
Franck Bui-Huu71fb2e82006-09-25 23:31:05 -0700[diff] [blame]118 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
Johannes Weinerc6af5e92008-07-25 15:48:04 +0200[diff] [blame]119
120extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
121 int flags);
Johannes Weiner223e8dc2008-07-23 21:28:00 -0700[diff] [blame]122
123extern void *alloc_bootmem_section(unsigned long size,
124 unsigned long section_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]125
Dave Hansen6f167ec2005-06-23 00:07:39 -0700[diff] [blame]126#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
127extern void *alloc_remap(int nid, unsigned long size);
128#else
129static inline void *alloc_remap(int nid, unsigned long size)
130{
131 return NULL;
132}
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700[diff] [blame]133#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
Dave Hansen6f167ec2005-06-23 00:07:39 -0700[diff] [blame]134
David Howells9dec17e2006-07-10 04:44:51 -0700[diff] [blame]135extern unsigned long __meminitdata nr_kernel_pages;
David Howells8da38d72007-03-22 00:11:22 -0800[diff] [blame]136extern unsigned long __meminitdata nr_all_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]137
Franck Bui-Huuf71bf0c2006-09-25 23:31:08 -0700[diff] [blame]138extern void *alloc_large_system_hash(const char *tablename,
139 unsigned long bucketsize,
140 unsigned long numentries,
141 int scale,
142 int flags,
143 unsigned int *_hash_shift,
144 unsigned int *_hash_mask,
145 unsigned long limit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]146
Andrew Morton04903662006-12-06 20:37:33 -0800[diff] [blame]147#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]148
Anton Blanchardc2fdf3a2009-03-31 15:23:19 -0700[diff] [blame]149/* Only NUMA needs hash distribution. 64bit NUMA architectures have
150 * sufficient vmalloc space.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]151 */
Anton Blanchardc2fdf3a2009-03-31 15:23:19 -0700[diff] [blame]152#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]153#define HASHDIST_DEFAULT 1
154#else
155#define HASHDIST_DEFAULT 0
156#endif
David S. Millerf034b5d2006-08-24 03:08:07 -0700[diff] [blame]157extern int hashdist; /* Distribute hashes across NUMA nodes? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]159
160#endif /* _LINUX_BOOTMEM_H */