1#ifndef _LINUX_VMALLOC_H
2#define _LINUX_VMALLOC_H
3
4#include <linux/spinlock.h>
5#include <asm/page.h>		/* pgprot_t */
6
7struct vm_area_struct;
8
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 */
16
17/*
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
25struct 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);
39extern void *vmalloc_user(unsigned long size);
40extern void *vmalloc_node(unsigned long size, int node);
41extern void *vmalloc_exec(unsigned long size);
42extern void *vmalloc_32(unsigned long size);
43extern void *vmalloc_32_user(unsigned long size);
44extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
45extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
46				pgprot_t prot);
47extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask,
48				pgprot_t prot, int node);
49extern void vfree(void *addr);
50
51extern void *vmap(struct page **pages, unsigned int count,
52			unsigned long flags, pgprot_t prot);
53extern void vunmap(void *addr);
54
55extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
56							unsigned long pgoff);
57
58/*
59 *	Lowlevel-APIs (not for driver use!)
60 */
61extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
62extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
63					unsigned long start, unsigned long end);
64extern struct vm_struct *get_vm_area_node(unsigned long size,
65					unsigned long flags, int node);
66extern struct vm_struct *remove_vm_area(void *addr);
67extern struct vm_struct *__remove_vm_area(void *addr);
68extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
69			struct page ***pages);
70extern void unmap_vm_area(struct vm_struct *area);
71
72/*
73 *	Internals.  Dont't use..
74 */
75extern rwlock_t vmlist_lock;
76extern struct vm_struct *vmlist;
77
78#endif /* _LINUX_VMALLOC_H */
79