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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 | |
a0d40c80 JF |
10 | extern bool vmap_lazy_unmap; |
11 | ||
605d9288 | 12 | /* bits in flags of vmalloc's vm_struct below */ |
1da177e4 LT |
13 | #define VM_IOREMAP 0x00000001 /* ioremap() and friends */ |
14 | #define VM_ALLOC 0x00000002 /* vmalloc() */ | |
15 | #define VM_MAP 0x00000004 /* vmap()ed pages */ | |
83342314 | 16 | #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ |
8757d5fa | 17 | #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ |
1da177e4 LT |
18 | /* bits [20..32] reserved for arch specific ioremap internals */ |
19 | ||
fd195c49 DS |
20 | /* |
21 | * Maximum alignment for ioremap() regions. | |
22 | * Can be overriden by arch-specific value. | |
23 | */ | |
24 | #ifndef IOREMAP_MAX_ORDER | |
25 | #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ | |
26 | #endif | |
27 | ||
1da177e4 | 28 | struct vm_struct { |
2b4ac44e | 29 | struct vm_struct *next; |
1da177e4 LT |
30 | void *addr; |
31 | unsigned long size; | |
32 | unsigned long flags; | |
33 | struct page **pages; | |
34 | unsigned int nr_pages; | |
ffa71f33 | 35 | phys_addr_t phys_addr; |
23016969 | 36 | void *caller; |
1da177e4 LT |
37 | }; |
38 | ||
39 | /* | |
40 | * Highlevel APIs for driver use | |
41 | */ | |
db64fe02 NP |
42 | extern void vm_unmap_ram(const void *mem, unsigned int count); |
43 | extern void *vm_map_ram(struct page **pages, unsigned int count, | |
44 | int node, pgprot_t prot); | |
45 | extern void vm_unmap_aliases(void); | |
46 | ||
47 | #ifdef CONFIG_MMU | |
48 | extern void __init vmalloc_init(void); | |
49 | #else | |
50 | static inline void vmalloc_init(void) | |
51 | { | |
52 | } | |
53 | #endif | |
54 | ||
1da177e4 | 55 | extern void *vmalloc(unsigned long size); |
e1ca7788 | 56 | extern void *vzalloc(unsigned long size); |
83342314 | 57 | extern void *vmalloc_user(unsigned long size); |
930fc45a | 58 | extern void *vmalloc_node(unsigned long size, int node); |
e1ca7788 | 59 | extern void *vzalloc_node(unsigned long size, int node); |
1da177e4 LT |
60 | extern void *vmalloc_exec(unsigned long size); |
61 | extern void *vmalloc_32(unsigned long size); | |
83342314 | 62 | extern void *vmalloc_32_user(unsigned long size); |
dd0fc66f | 63 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
930fc45a CL |
64 | extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, |
65 | pgprot_t prot); | |
b3bdda02 | 66 | extern void vfree(const void *addr); |
1da177e4 LT |
67 | |
68 | extern void *vmap(struct page **pages, unsigned int count, | |
69 | unsigned long flags, pgprot_t prot); | |
b3bdda02 | 70 | extern void vunmap(const void *addr); |
83342314 NP |
71 | |
72 | extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, | |
73 | unsigned long pgoff); | |
1eeb66a1 | 74 | void vmalloc_sync_all(void); |
1da177e4 LT |
75 | |
76 | /* | |
77 | * Lowlevel-APIs (not for driver use!) | |
78 | */ | |
9585116b JF |
79 | |
80 | static inline size_t get_vm_area_size(const struct vm_struct *area) | |
81 | { | |
82 | /* return actual size without guard page */ | |
83 | return area->size - PAGE_SIZE; | |
84 | } | |
85 | ||
1da177e4 | 86 | extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); |
23016969 CL |
87 | extern struct vm_struct *get_vm_area_caller(unsigned long size, |
88 | unsigned long flags, void *caller); | |
1da177e4 LT |
89 | extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, |
90 | unsigned long start, unsigned long end); | |
c2968612 BH |
91 | extern struct vm_struct *__get_vm_area_caller(unsigned long size, |
92 | unsigned long flags, | |
93 | unsigned long start, unsigned long end, | |
94 | void *caller); | |
930fc45a | 95 | extern struct vm_struct *get_vm_area_node(unsigned long size, |
52fd24ca GP |
96 | unsigned long flags, int node, |
97 | gfp_t gfp_mask); | |
b3bdda02 | 98 | extern struct vm_struct *remove_vm_area(const void *addr); |
c19c03fc | 99 | |
1da177e4 LT |
100 | extern int map_vm_area(struct vm_struct *area, pgprot_t prot, |
101 | struct page ***pages); | |
8fc48985 TH |
102 | extern int map_kernel_range_noflush(unsigned long start, unsigned long size, |
103 | pgprot_t prot, struct page **pages); | |
104 | extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size); | |
c19c03fc | 105 | extern void unmap_kernel_range(unsigned long addr, unsigned long size); |
1da177e4 | 106 | |
5f4352fb JF |
107 | /* Allocate/destroy a 'vmalloc' VM area. */ |
108 | extern struct vm_struct *alloc_vm_area(size_t size); | |
109 | extern void free_vm_area(struct vm_struct *area); | |
110 | ||
69beeb1d KM |
111 | /* for /dev/kmem */ |
112 | extern long vread(char *buf, char *addr, unsigned long count); | |
113 | extern long vwrite(char *buf, char *addr, unsigned long count); | |
114 | ||
1da177e4 LT |
115 | /* |
116 | * Internals. Dont't use.. | |
117 | */ | |
118 | extern rwlock_t vmlist_lock; | |
119 | extern struct vm_struct *vmlist; | |
c0c0a293 | 120 | extern __init void vm_area_register_early(struct vm_struct *vm, size_t align); |
1da177e4 | 121 | |
4f8b02b4 | 122 | #ifdef CONFIG_SMP |
ca23e405 TH |
123 | struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, |
124 | const size_t *sizes, int nr_vms, | |
125 | size_t align, gfp_t gfp_mask); | |
126 | ||
127 | void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms); | |
4f8b02b4 | 128 | #endif |
ca23e405 | 129 | |
1da177e4 | 130 | #endif /* _LINUX_VMALLOC_H */ |