Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_VMALLOC_H |
2 | #define _LINUX_VMALLOC_H | |
3 | ||
4 | #include <linux/spinlock.h> | |
db64fe02 | 5 | #include <linux/init.h> |
1da177e4 LT |
6 | #include <asm/page.h> /* pgprot_t */ |
7 | ||
605d9288 | 8 | struct vm_area_struct; /* vma defining user mapping in mm_types.h */ |
83342314 | 9 | |
605d9288 | 10 | /* bits in flags of vmalloc's vm_struct below */ |
1da177e4 LT |
11 | #define VM_IOREMAP 0x00000001 /* ioremap() and friends */ |
12 | #define VM_ALLOC 0x00000002 /* vmalloc() */ | |
13 | #define VM_MAP 0x00000004 /* vmap()ed pages */ | |
83342314 | 14 | #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ |
8757d5fa | 15 | #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ |
1da177e4 LT |
16 | /* bits [20..32] reserved for arch specific ioremap internals */ |
17 | ||
fd195c49 DS |
18 | /* |
19 | * Maximum alignment for ioremap() regions. | |
20 | * Can be overriden by arch-specific value. | |
21 | */ | |
22 | #ifndef IOREMAP_MAX_ORDER | |
23 | #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ | |
24 | #endif | |
25 | ||
1da177e4 | 26 | struct vm_struct { |
2b4ac44e | 27 | struct vm_struct *next; |
1da177e4 LT |
28 | void *addr; |
29 | unsigned long size; | |
30 | unsigned long flags; | |
31 | struct page **pages; | |
32 | unsigned int nr_pages; | |
ffa71f33 | 33 | phys_addr_t phys_addr; |
23016969 | 34 | void *caller; |
1da177e4 LT |
35 | }; |
36 | ||
37 | /* | |
38 | * Highlevel APIs for driver use | |
39 | */ | |
db64fe02 NP |
40 | extern void vm_unmap_ram(const void *mem, unsigned int count); |
41 | extern void *vm_map_ram(struct page **pages, unsigned int count, | |
42 | int node, pgprot_t prot); | |
43 | extern void vm_unmap_aliases(void); | |
44 | ||
45 | #ifdef CONFIG_MMU | |
46 | extern void __init vmalloc_init(void); | |
47 | #else | |
48 | static inline void vmalloc_init(void) | |
49 | { | |
50 | } | |
51 | #endif | |
52 | ||
1da177e4 | 53 | extern void *vmalloc(unsigned long size); |
e1ca7788 | 54 | extern void *vzalloc(unsigned long size); |
83342314 | 55 | extern void *vmalloc_user(unsigned long size); |
930fc45a | 56 | extern void *vmalloc_node(unsigned long size, int node); |
e1ca7788 | 57 | extern void *vzalloc_node(unsigned long size, int node); |
1da177e4 LT |
58 | extern void *vmalloc_exec(unsigned long size); |
59 | extern void *vmalloc_32(unsigned long size); | |
83342314 | 60 | extern void *vmalloc_32_user(unsigned long size); |
dd0fc66f | 61 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
d0a21265 DR |
62 | extern void *__vmalloc_node_range(unsigned long size, unsigned long align, |
63 | unsigned long start, unsigned long end, gfp_t gfp_mask, | |
64 | pgprot_t prot, int node, void *caller); | |
b3bdda02 | 65 | extern void vfree(const void *addr); |
1da177e4 LT |
66 | |
67 | extern void *vmap(struct page **pages, unsigned int count, | |
68 | unsigned long flags, pgprot_t prot); | |
b3bdda02 | 69 | extern void vunmap(const void *addr); |
83342314 NP |
70 | |
71 | extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, | |
72 | unsigned long pgoff); | |
1eeb66a1 | 73 | void vmalloc_sync_all(void); |
1da177e4 LT |
74 | |
75 | /* | |
76 | * Lowlevel-APIs (not for driver use!) | |
77 | */ | |
9585116b JF |
78 | |
79 | static inline size_t get_vm_area_size(const struct vm_struct *area) | |
80 | { | |
81 | /* return actual size without guard page */ | |
82 | return area->size - PAGE_SIZE; | |
83 | } | |
84 | ||
1da177e4 | 85 | extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); |
23016969 CL |
86 | extern struct vm_struct *get_vm_area_caller(unsigned long size, |
87 | unsigned long flags, void *caller); | |
1da177e4 LT |
88 | extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, |
89 | unsigned long start, unsigned long end); | |
c2968612 BH |
90 | extern struct vm_struct *__get_vm_area_caller(unsigned long size, |
91 | unsigned long flags, | |
92 | unsigned long start, unsigned long end, | |
93 | void *caller); | |
b3bdda02 | 94 | extern struct vm_struct *remove_vm_area(const void *addr); |
c19c03fc | 95 | |
1da177e4 LT |
96 | extern int map_vm_area(struct vm_struct *area, pgprot_t prot, |
97 | struct page ***pages); | |
b554cb42 | 98 | #ifdef CONFIG_MMU |
8fc48985 TH |
99 | extern int map_kernel_range_noflush(unsigned long start, unsigned long size, |
100 | pgprot_t prot, struct page **pages); | |
101 | extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size); | |
c19c03fc | 102 | extern void unmap_kernel_range(unsigned long addr, unsigned long size); |
b554cb42 GY |
103 | #else |
104 | static inline int | |
105 | map_kernel_range_noflush(unsigned long start, unsigned long size, | |
106 | pgprot_t prot, struct page **pages) | |
107 | { | |
108 | return size >> PAGE_SHIFT; | |
109 | } | |
110 | static inline void | |
111 | unmap_kernel_range_noflush(unsigned long addr, unsigned long size) | |
112 | { | |
113 | } | |
114 | static inline void | |
115 | unmap_kernel_range(unsigned long addr, unsigned long size) | |
116 | { | |
117 | } | |
118 | #endif | |
1da177e4 | 119 | |
5f4352fb JF |
120 | /* Allocate/destroy a 'vmalloc' VM area. */ |
121 | extern struct vm_struct *alloc_vm_area(size_t size); | |
122 | extern void free_vm_area(struct vm_struct *area); | |
123 | ||
69beeb1d KM |
124 | /* for /dev/kmem */ |
125 | extern long vread(char *buf, char *addr, unsigned long count); | |
126 | extern long vwrite(char *buf, char *addr, unsigned long count); | |
127 | ||
1da177e4 LT |
128 | /* |
129 | * Internals. Dont't use.. | |
130 | */ | |
131 | extern rwlock_t vmlist_lock; | |
132 | extern struct vm_struct *vmlist; | |
c0c0a293 | 133 | extern __init void vm_area_register_early(struct vm_struct *vm, size_t align); |
1da177e4 | 134 | |
4f8b02b4 | 135 | #ifdef CONFIG_SMP |
b554cb42 | 136 | # ifdef CONFIG_MMU |
ca23e405 TH |
137 | struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, |
138 | const size_t *sizes, int nr_vms, | |
ec3f64fc | 139 | size_t align); |
ca23e405 TH |
140 | |
141 | void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms); | |
b554cb42 GY |
142 | # else |
143 | static inline struct vm_struct ** | |
144 | pcpu_get_vm_areas(const unsigned long *offsets, | |
145 | const size_t *sizes, int nr_vms, | |
146 | size_t align) | |
147 | { | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | static inline void | |
152 | pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) | |
153 | { | |
154 | } | |
155 | # endif | |
4f8b02b4 | 156 | #endif |
ca23e405 | 157 | |
1da177e4 | 158 | #endif /* _LINUX_VMALLOC_H */ |