1 #ifndef _LINUX_VMALLOC_H
2 #define _LINUX_VMALLOC_H
4 #include <linux/spinlock.h>
5 #include <linux/init.h>
6 #include <asm/page.h> /* pgprot_t */
8 struct vm_area_struct
; /* vma defining user mapping in mm_types.h */
10 /* bits in flags of vmalloc's vm_struct below */
11 #define VM_IOREMAP 0x00000001 /* ioremap() and friends */
12 #define VM_ALLOC 0x00000002 /* vmalloc() */
13 #define VM_MAP 0x00000004 /* vmap()ed pages */
14 #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
15 #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
16 /* bits [20..32] reserved for arch specific ioremap internals */
19 * Maximum alignment for ioremap() regions.
20 * Can be overriden by arch-specific value.
22 #ifndef IOREMAP_MAX_ORDER
23 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
27 struct vm_struct
*next
;
32 unsigned int nr_pages
;
33 unsigned long phys_addr
;
38 * Highlevel APIs for driver use
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);
46 extern void __init
vmalloc_init(void);
48 static inline void vmalloc_init(void)
53 extern void *vmalloc(unsigned long size
);
54 extern void *vmalloc_user(unsigned long size
);
55 extern void *vmalloc_node(unsigned long size
, int node
);
56 extern void *vmalloc_exec(unsigned long size
);
57 extern void *vmalloc_32(unsigned long size
);
58 extern void *vmalloc_32_user(unsigned long size
);
59 extern void *__vmalloc(unsigned long size
, gfp_t gfp_mask
, pgprot_t prot
);
60 extern void *__vmalloc_area(struct vm_struct
*area
, gfp_t gfp_mask
,
62 extern void vfree(const void *addr
);
64 extern void *vmap(struct page
**pages
, unsigned int count
,
65 unsigned long flags
, pgprot_t prot
);
66 extern void vunmap(const void *addr
);
68 extern int remap_vmalloc_range(struct vm_area_struct
*vma
, void *addr
,
70 void vmalloc_sync_all(void);
73 * Lowlevel-APIs (not for driver use!)
76 static inline size_t get_vm_area_size(const struct vm_struct
*area
)
78 /* return actual size without guard page */
79 return area
->size
- PAGE_SIZE
;
82 extern struct vm_struct
*get_vm_area(unsigned long size
, unsigned long flags
);
83 extern struct vm_struct
*get_vm_area_caller(unsigned long size
,
84 unsigned long flags
, void *caller
);
85 extern struct vm_struct
*__get_vm_area(unsigned long size
, unsigned long flags
,
86 unsigned long start
, unsigned long end
);
87 extern struct vm_struct
*get_vm_area_node(unsigned long size
,
88 unsigned long flags
, int node
,
90 extern struct vm_struct
*remove_vm_area(const void *addr
);
92 extern int map_vm_area(struct vm_struct
*area
, pgprot_t prot
,
93 struct page
***pages
);
94 extern void unmap_kernel_range(unsigned long addr
, unsigned long size
);
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
);
101 extern long vread(char *buf
, char *addr
, unsigned long count
);
102 extern long vwrite(char *buf
, char *addr
, unsigned long count
);
105 * Internals. Dont't use..
107 extern rwlock_t vmlist_lock
;
108 extern struct vm_struct
*vmlist
;
110 #endif /* _LINUX_VMALLOC_H */
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