1 #ifndef _LINUX_VMALLOC_H
2 #define _LINUX_VMALLOC_H
4 #include <linux/spinlock.h>
5 #include <asm/page.h> /* pgprot_t */
9 /* bits in vm_struct->flags */
10 #define VM_IOREMAP 0x00000001 /* ioremap() and friends */
11 #define VM_ALLOC 0x00000002 /* vmalloc() */
12 #define VM_MAP 0x00000004 /* vmap()ed pages */
13 #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
14 #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
15 /* bits [20..32] reserved for arch specific ioremap internals */
18 * Maximum alignment for ioremap() regions.
19 * Can be overriden by arch-specific value.
21 #ifndef IOREMAP_MAX_ORDER
22 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
26 /* keep next,addr,size together to speedup lookups */
27 struct vm_struct *next;
32 unsigned int nr_pages;
33 unsigned long phys_addr;
38 * Highlevel APIs for driver use
40 extern void *vmalloc(unsigned long size);
41 extern void *vmalloc_user(unsigned long size);
42 extern void *vmalloc_node(unsigned long size, int node);
43 extern void *vmalloc_exec(unsigned long size);
44 extern void *vmalloc_32(unsigned long size);
45 extern void *vmalloc_32_user(unsigned long size);
46 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
47 extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
49 extern void vfree(const void *addr);
51 extern void *vmap(struct page **pages, unsigned int count,
52 unsigned long flags, pgprot_t prot);
53 extern void vunmap(const void *addr);
55 extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
57 void vmalloc_sync_all(void);
60 * Lowlevel-APIs (not for driver use!)
63 static inline size_t get_vm_area_size(const struct vm_struct *area)
65 /* return actual size without guard page */
66 return area->size - PAGE_SIZE;
69 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
70 extern struct vm_struct *get_vm_area_caller(unsigned long size,
71 unsigned long flags, void *caller);
72 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
73 unsigned long start, unsigned long end);
74 extern struct vm_struct *get_vm_area_node(unsigned long size,
75 unsigned long flags, int node,
77 extern struct vm_struct *remove_vm_area(const void *addr);
79 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
80 struct page ***pages);
81 extern void unmap_kernel_range(unsigned long addr, unsigned long size);
83 /* Allocate/destroy a 'vmalloc' VM area. */
84 extern struct vm_struct *alloc_vm_area(size_t size);
85 extern void free_vm_area(struct vm_struct *area);
88 * Internals. Dont't use..
90 extern rwlock_t vmlist_lock;
91 extern struct vm_struct *vmlist;
93 extern const struct seq_operations vmalloc_op;
95 #endif /* _LINUX_VMALLOC_H */