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1da177e4 LT |
1 | /* internal.h: mm/ internal definitions |
2 | * | |
3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
0f8053a5 NP |
11 | #ifndef __MM_INTERNAL_H |
12 | #define __MM_INTERNAL_H | |
13 | ||
14 | #include <linux/mm.h> | |
1da177e4 | 15 | |
42b77728 JB |
16 | void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, |
17 | unsigned long floor, unsigned long ceiling); | |
18 | ||
7835e98b | 19 | static inline void set_page_count(struct page *page, int v) |
77a8a788 | 20 | { |
7835e98b NP |
21 | atomic_set(&page->_count, v); |
22 | } | |
23 | ||
24 | /* | |
25 | * Turn a non-refcounted page (->_count == 0) into refcounted with | |
26 | * a count of one. | |
27 | */ | |
28 | static inline void set_page_refcounted(struct page *page) | |
29 | { | |
ae1276b9 | 30 | VM_BUG_ON(PageTail(page)); |
725d704e | 31 | VM_BUG_ON(atomic_read(&page->_count)); |
77a8a788 | 32 | set_page_count(page, 1); |
77a8a788 NP |
33 | } |
34 | ||
0f8053a5 NP |
35 | static inline void __put_page(struct page *page) |
36 | { | |
37 | atomic_dec(&page->_count); | |
38 | } | |
39 | ||
0c0a4a51 | 40 | extern void __free_pages_bootmem(struct page *page, unsigned int order); |
0f8053a5 | 41 | |
48f13bf3 MG |
42 | /* |
43 | * function for dealing with page's order in buddy system. | |
44 | * zone->lock is already acquired when we use these. | |
45 | * So, we don't need atomic page->flags operations here. | |
46 | */ | |
47 | static inline unsigned long page_order(struct page *page) | |
48 | { | |
49 | VM_BUG_ON(!PageBuddy(page)); | |
50 | return page_private(page); | |
51 | } | |
b5a0e011 AH |
52 | |
53 | /* | |
54 | * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node, | |
55 | * so all functions starting at paging_init should be marked __init | |
56 | * in those cases. SPARSEMEM, however, allows for memory hotplug, | |
57 | * and alloc_bootmem_node is not used. | |
58 | */ | |
59 | #ifdef CONFIG_SPARSEMEM | |
60 | #define __paginginit __meminit | |
61 | #else | |
62 | #define __paginginit __init | |
63 | #endif | |
64 | ||
6b74ab97 MG |
65 | /* Memory initialisation debug and verification */ |
66 | enum mminit_level { | |
67 | MMINIT_WARNING, | |
68 | MMINIT_VERIFY, | |
69 | MMINIT_TRACE | |
70 | }; | |
71 | ||
72 | #ifdef CONFIG_DEBUG_MEMORY_INIT | |
73 | ||
74 | extern int mminit_loglevel; | |
75 | ||
76 | #define mminit_dprintk(level, prefix, fmt, arg...) \ | |
77 | do { \ | |
78 | if (level < mminit_loglevel) { \ | |
79 | printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \ | |
80 | printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \ | |
81 | } \ | |
82 | } while (0) | |
83 | ||
708614e6 MG |
84 | extern void mminit_verify_pageflags_layout(void); |
85 | extern void mminit_verify_page_links(struct page *page, | |
86 | enum zone_type zone, unsigned long nid, unsigned long pfn); | |
68ad8df4 | 87 | extern void mminit_verify_zonelist(void); |
708614e6 | 88 | |
6b74ab97 MG |
89 | #else |
90 | ||
91 | static inline void mminit_dprintk(enum mminit_level level, | |
92 | const char *prefix, const char *fmt, ...) | |
93 | { | |
94 | } | |
95 | ||
708614e6 MG |
96 | static inline void mminit_verify_pageflags_layout(void) |
97 | { | |
98 | } | |
99 | ||
100 | static inline void mminit_verify_page_links(struct page *page, | |
101 | enum zone_type zone, unsigned long nid, unsigned long pfn) | |
102 | { | |
103 | } | |
68ad8df4 MG |
104 | |
105 | static inline void mminit_verify_zonelist(void) | |
106 | { | |
107 | } | |
6b74ab97 | 108 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
2dbb51c4 MG |
109 | |
110 | /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ | |
111 | #if defined(CONFIG_SPARSEMEM) | |
112 | extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
113 | unsigned long *end_pfn); | |
114 | #else | |
115 | static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
116 | unsigned long *end_pfn) | |
117 | { | |
118 | } | |
119 | #endif /* CONFIG_SPARSEMEM */ | |
120 | ||
0f8053a5 | 121 | #endif |