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
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 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);
52
53extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
54 unsigned long pgoff);
55
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);
62extern struct vm_struct *get_vm_area_node(unsigned long size,
63 unsigned long flags, int node,
64 gfp_t gfp_mask);
65extern struct vm_struct *remove_vm_area(void *addr);
66extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
67 struct page ***pages);
68extern void unmap_vm_area(struct vm_struct *area);
69
70/*
71 * Internals. Dont't use..
72 */
73extern rwlock_t vmlist_lock;
74extern struct vm_struct *vmlist;
75
76#endif /* _LINUX_VMALLOC_H */