| 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 | */ |
| 11 | #ifndef __MM_INTERNAL_H |
| 12 | #define __MM_INTERNAL_H |
| 13 | |
| 14 | #include <linux/mm.h> |
| 15 | |
| 16 | void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, |
| 17 | unsigned long floor, unsigned long ceiling); |
| 18 | |
| 19 | extern void prep_compound_page(struct page *page, unsigned long order); |
| 20 | |
| 21 | static inline void set_page_count(struct page *page, int v) |
| 22 | { |
| 23 | atomic_set(&page->_count, v); |
| 24 | } |
| 25 | |
| 26 | /* |
| 27 | * Turn a non-refcounted page (->_count == 0) into refcounted with |
| 28 | * a count of one. |
| 29 | */ |
| 30 | static inline void set_page_refcounted(struct page *page) |
| 31 | { |
| 32 | VM_BUG_ON(PageTail(page)); |
| 33 | VM_BUG_ON(atomic_read(&page->_count)); |
| 34 | set_page_count(page, 1); |
| 35 | } |
| 36 | |
| 37 | static inline void __put_page(struct page *page) |
| 38 | { |
| 39 | atomic_dec(&page->_count); |
| 40 | } |
| 41 | |
| 42 | extern void __free_pages_bootmem(struct page *page, unsigned int order); |
| 43 | |
| 44 | /* |
| 45 | * function for dealing with page's order in buddy system. |
| 46 | * zone->lock is already acquired when we use these. |
| 47 | * So, we don't need atomic page->flags operations here. |
| 48 | */ |
| 49 | static inline unsigned long page_order(struct page *page) |
| 50 | { |
| 51 | VM_BUG_ON(!PageBuddy(page)); |
| 52 | return page_private(page); |
| 53 | } |
| 54 | |
| 55 | /* |
| 56 | * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node, |
| 57 | * so all functions starting at paging_init should be marked __init |
| 58 | * in those cases. SPARSEMEM, however, allows for memory hotplug, |
| 59 | * and alloc_bootmem_node is not used. |
| 60 | */ |
| 61 | #ifdef CONFIG_SPARSEMEM |
| 62 | #define __paginginit __meminit |
| 63 | #else |
| 64 | #define __paginginit __init |
| 65 | #endif |
| 66 | |
| 67 | /* Memory initialisation debug and verification */ |
| 68 | enum mminit_level { |
| 69 | MMINIT_WARNING, |
| 70 | MMINIT_VERIFY, |
| 71 | MMINIT_TRACE |
| 72 | }; |
| 73 | |
| 74 | #ifdef CONFIG_DEBUG_MEMORY_INIT |
| 75 | |
| 76 | extern int mminit_loglevel; |
| 77 | |
| 78 | #define mminit_dprintk(level, prefix, fmt, arg...) \ |
| 79 | do { \ |
| 80 | if (level < mminit_loglevel) { \ |
| 81 | printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \ |
| 82 | printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \ |
| 83 | } \ |
| 84 | } while (0) |
| 85 | |
| 86 | extern void mminit_verify_pageflags_layout(void); |
| 87 | extern void mminit_verify_page_links(struct page *page, |
| 88 | enum zone_type zone, unsigned long nid, unsigned long pfn); |
| 89 | extern void mminit_verify_zonelist(void); |
| 90 | |
| 91 | #else |
| 92 | |
| 93 | static inline void mminit_dprintk(enum mminit_level level, |
| 94 | const char *prefix, const char *fmt, ...) |
| 95 | { |
| 96 | } |
| 97 | |
| 98 | static inline void mminit_verify_pageflags_layout(void) |
| 99 | { |
| 100 | } |
| 101 | |
| 102 | static inline void mminit_verify_page_links(struct page *page, |
| 103 | enum zone_type zone, unsigned long nid, unsigned long pfn) |
| 104 | { |
| 105 | } |
| 106 | |
| 107 | static inline void mminit_verify_zonelist(void) |
| 108 | { |
| 109 | } |
| 110 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
| 111 | |
| 112 | /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ |
| 113 | #if defined(CONFIG_SPARSEMEM) |
| 114 | extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, |
| 115 | unsigned long *end_pfn); |
| 116 | #else |
| 117 | static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, |
| 118 | unsigned long *end_pfn) |
| 119 | { |
| 120 | } |
| 121 | #endif /* CONFIG_SPARSEMEM */ |
| 122 | |
| 123 | #endif |