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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_VMALLOC_H
2#define _LINUX_VMALLOC_H
3
4#include <linux/spinlock.h>
5#include <asm/page.h> /* pgprot_t */
6
Nick Piggin83342312006-06-23 02:03:20 -07007struct vm_area_struct;
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009/* 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 */
Nick Piggin83342312006-06-23 02:03:20 -070013#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
Jan Kiszka8757d5f2006-07-14 00:23:56 -070014#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
Linus Torvalds1da177e2005-04-16 15:20:36 -070015/* bits [20..32] reserved for arch specific ioremap internals */
16
Deepak Saxenafd195c42005-09-03 15:54:58 -070017/*
18 * Maximum alignment for ioremap() regions.
19 * Can be overriden by arch-specific value.
20 */
21#ifndef IOREMAP_MAX_ORDER
22#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
23#endif
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025struct vm_struct {
26 void *addr;
27 unsigned long size;
28 unsigned long flags;
29 struct page **pages;
30 unsigned int nr_pages;
31 unsigned long phys_addr;
32 struct vm_struct *next;
33};
34
35/*
36 * Highlevel APIs for driver use
37 */
38extern void *vmalloc(unsigned long size);
Nick Piggin83342312006-06-23 02:03:20 -070039extern void *vmalloc_user(unsigned long size);
Christoph Lameter930fc452005-10-29 18:15:41 -070040extern void *vmalloc_node(unsigned long size, int node);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041extern void *vmalloc_exec(unsigned long size);
42extern void *vmalloc_32(unsigned long size);
Nick Piggin83342312006-06-23 02:03:20 -070043extern void *vmalloc_32_user(unsigned long size);
Al Virodd0fc662005-10-07 07:46:04 +010044extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
Christoph Lameter930fc452005-10-29 18:15:41 -070045extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
46 pgprot_t prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047extern void vfree(void *addr);
48
49extern void *vmap(struct page **pages, unsigned int count,
50 unsigned long flags, pgprot_t prot);
51extern void vunmap(void *addr);
Nick Piggin83342312006-06-23 02:03:20 -070052
53extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
54 unsigned long pgoff);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56/*
57 * Lowlevel-APIs (not for driver use!)
58 */
59extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
60extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
61 unsigned long start, unsigned long end);
Christoph Lameter930fc452005-10-29 18:15:41 -070062extern struct vm_struct *get_vm_area_node(unsigned long size,
63 unsigned long flags, int node);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064extern struct vm_struct *remove_vm_area(void *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
66 struct page ***pages);
67extern void unmap_vm_area(struct vm_struct *area);
68
69/*
70 * Internals. Dont't use..
71 */
72extern rwlock_t vmlist_lock;
73extern struct vm_struct *vmlist;
74
75#endif /* _LINUX_VMALLOC_H */