Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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/* bits [20..32] reserved for arch specific ioremap internals */
15
16/*
17 * Maximum alignment for ioremap() regions.
18 * Can be overriden by arch-specific value.
19 */
20#ifndef IOREMAP_MAX_ORDER
21#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
22#endif
23
24struct vm_struct {
25 void *addr;
26 unsigned long size;
27 unsigned long flags;
28 struct page **pages;
29 unsigned int nr_pages;
30 unsigned long phys_addr;
31 struct vm_struct *next;
32};
33
34/*
35 * Highlevel APIs for driver use
36 */
37extern void *vmalloc(unsigned long size);
38extern void *vmalloc_user(unsigned long size);
39extern void *vmalloc_node(unsigned long size, int node);
40extern void *vmalloc_exec(unsigned long size);
41extern void *vmalloc_32(unsigned long size);
42extern void *vmalloc_32_user(unsigned long size);
43extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
44extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
45 pgprot_t prot);
46extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask,
47 pgprot_t prot, int node);
48extern void vfree(void *addr);
49
50extern void *vmap(struct page **pages, unsigned int count,
51 unsigned long flags, pgprot_t prot);
52extern void vunmap(void *addr);
53
54extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
55 unsigned long pgoff);
56
57/*
58 * Lowlevel-APIs (not for driver use!)
59 */
60extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
61extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
62 unsigned long start, unsigned long end);
63extern struct vm_struct *get_vm_area_node(unsigned long size,
64 unsigned long flags, int node);
65extern struct vm_struct *remove_vm_area(void *addr);
66extern struct vm_struct *__remove_vm_area(void *addr);
67extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
68 struct page ***pages);
69extern void unmap_vm_area(struct vm_struct *area);
70
71/*
72 * Internals. Dont't use..
73 */
74extern rwlock_t vmlist_lock;
75extern struct vm_struct *vmlist;
76
77#endif /* _LINUX_VMALLOC_H */