Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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
7/* bits in vm_struct->flags */
8#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
9#define VM_ALLOC 0x00000002 /* vmalloc() */
10#define VM_MAP 0x00000004 /* vmap()ed pages */
11/* bits [20..32] reserved for arch specific ioremap internals */
12
13/*
14 * Maximum alignment for ioremap() regions.
15 * Can be overriden by arch-specific value.
16 */
17#ifndef IOREMAP_MAX_ORDER
18#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
19#endif
20
21struct vm_struct {
22 void *addr;
23 unsigned long size;
24 unsigned long flags;
25 struct page **pages;
26 unsigned int nr_pages;
27 unsigned long phys_addr;
28 struct vm_struct *next;
29};
30
31/*
32 * Highlevel APIs for driver use
33 */
34extern void *vmalloc(unsigned long size);
35extern void *vmalloc_exec(unsigned long size);
36extern void *vmalloc_32(unsigned long size);
37extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
38extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot);
39extern void vfree(void *addr);
40
41extern void *vmap(struct page **pages, unsigned int count,
42 unsigned long flags, pgprot_t prot);
43extern void vunmap(void *addr);
44
45/*
46 * Lowlevel-APIs (not for driver use!)
47 */
48extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
49extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
50 unsigned long start, unsigned long end);
51extern struct vm_struct *remove_vm_area(void *addr);
52extern struct vm_struct *__remove_vm_area(void *addr);
53extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
54 struct page ***pages);
55extern void unmap_vm_area(struct vm_struct *area);
56
57/*
58 * Internals. Dont't use..
59 */
60extern rwlock_t vmlist_lock;
61extern struct vm_struct *vmlist;
62
63#endif /* _LINUX_VMALLOC_H */