Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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
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_node(unsigned long size, int node);
36extern void *vmalloc_exec(unsigned long size);
37extern void *vmalloc_32(unsigned long size);
38extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
39extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
40 pgprot_t prot);
41extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask,
42 pgprot_t prot, int node);
43extern void vfree(void *addr);
44
45extern void *vmap(struct page **pages, unsigned int count,
46 unsigned long flags, pgprot_t prot);
47extern void vunmap(void *addr);
48
49/*
50 * Lowlevel-APIs (not for driver use!)
51 */
52extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
53extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
54 unsigned long start, unsigned long end);
55extern struct vm_struct *get_vm_area_node(unsigned long size,
56 unsigned long flags, int node);
57extern struct vm_struct *remove_vm_area(void *addr);
58extern struct vm_struct *__remove_vm_area(void *addr);
59extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
60 struct page ***pages);
61extern void unmap_vm_area(struct vm_struct *area);
62
63/*
64 * Internals. Dont't use..
65 */
66extern rwlock_t vmlist_lock;
67extern struct vm_struct *vmlist;
68
69#endif /* _LINUX_VMALLOC_H */