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 */
30 unsigned int nr_pages;
31 unsigned long phys_addr;
32 struct vm_struct *next;
36 * Highlevel APIs for driver use
38 extern void *vmalloc(unsigned long size);
39 extern void *vmalloc_user(unsigned long size);
40 extern void *vmalloc_node(unsigned long size, int node);
41 extern void *vmalloc_exec(unsigned long size);
42 extern void *vmalloc_32(unsigned long size);
43 extern void *vmalloc_32_user(unsigned long size);
44 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
45 extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
47 extern void vfree(void *addr);
49 extern void *vmap(struct page **pages, unsigned int count,
50 unsigned long flags, pgprot_t prot);
51 extern void vunmap(void *addr);
53 extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
57 * Lowlevel-APIs (not for driver use!)
59 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
60 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
61 unsigned long start, unsigned long end);
62 extern struct vm_struct *get_vm_area_node(unsigned long size,
63 unsigned long flags, int node);
64 extern struct vm_struct *remove_vm_area(void *addr);
65 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
66 struct page ***pages);
67 extern void unmap_vm_area(struct vm_struct *area);
70 * Internals. Dont't use..
72 extern rwlock_t vmlist_lock;
73 extern struct vm_struct *vmlist;
75 #endif /* _LINUX_VMALLOC_H */