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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 | |
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; | |
33 | unsigned long 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); |
83342314 | 54 | extern void *vmalloc_user(unsigned long size); |
930fc45a | 55 | extern void *vmalloc_node(unsigned long size, int node); |
1da177e4 LT |
56 | extern void *vmalloc_exec(unsigned long size); |
57 | extern void *vmalloc_32(unsigned long size); | |
83342314 | 58 | extern void *vmalloc_32_user(unsigned long size); |
dd0fc66f | 59 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
930fc45a CL |
60 | extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, |
61 | pgprot_t prot); | |
b3bdda02 | 62 | extern void vfree(const void *addr); |
1da177e4 LT |
63 | |
64 | extern void *vmap(struct page **pages, unsigned int count, | |
65 | unsigned long flags, pgprot_t prot); | |
b3bdda02 | 66 | extern void vunmap(const void *addr); |
83342314 NP |
67 | |
68 | extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, | |
69 | unsigned long pgoff); | |
1eeb66a1 | 70 | void vmalloc_sync_all(void); |
1da177e4 LT |
71 | |
72 | /* | |
73 | * Lowlevel-APIs (not for driver use!) | |
74 | */ | |
9585116b JF |
75 | |
76 | static inline size_t get_vm_area_size(const struct vm_struct *area) | |
77 | { | |
78 | /* return actual size without guard page */ | |
79 | return area->size - PAGE_SIZE; | |
80 | } | |
81 | ||
1da177e4 | 82 | extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); |
23016969 CL |
83 | extern struct vm_struct *get_vm_area_caller(unsigned long size, |
84 | unsigned long flags, void *caller); | |
1da177e4 LT |
85 | extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, |
86 | unsigned long start, unsigned long end); | |
930fc45a | 87 | extern struct vm_struct *get_vm_area_node(unsigned long size, |
52fd24ca GP |
88 | unsigned long flags, int node, |
89 | gfp_t gfp_mask); | |
b3bdda02 | 90 | extern struct vm_struct *remove_vm_area(const void *addr); |
c19c03fc | 91 | |
1da177e4 LT |
92 | extern int map_vm_area(struct vm_struct *area, pgprot_t prot, |
93 | struct page ***pages); | |
c19c03fc | 94 | extern void unmap_kernel_range(unsigned long addr, unsigned long size); |
1da177e4 | 95 | |
5f4352fb JF |
96 | /* Allocate/destroy a 'vmalloc' VM area. */ |
97 | extern struct vm_struct *alloc_vm_area(size_t size); | |
98 | extern void free_vm_area(struct vm_struct *area); | |
99 | ||
69beeb1d KM |
100 | /* for /dev/kmem */ |
101 | extern long vread(char *buf, char *addr, unsigned long count); | |
102 | extern long vwrite(char *buf, char *addr, unsigned long count); | |
103 | ||
1da177e4 LT |
104 | /* |
105 | * Internals. Dont't use.. | |
106 | */ | |
107 | extern rwlock_t vmlist_lock; | |
108 | extern struct vm_struct *vmlist; | |
109 | ||
110 | #endif /* _LINUX_VMALLOC_H */ |