1#ifndef _LINUX_VMALLOC_H
2#define _LINUX_VMALLOC_H
3
4#include <linux/spinlock.h>
5#include <linux/init.h>
6#include <asm/page.h>
7
8struct vm_area_struct;
9
10
11#define VM_IOREMAP 0x00000001
12#define VM_ALLOC 0x00000002
13#define VM_MAP 0x00000004
14#define VM_USERMAP 0x00000008
15#define VM_VPAGES 0x00000010
16
17
18
19
20
21
22#ifndef IOREMAP_MAX_ORDER
23#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT)
24#endif
25
26struct vm_struct {
27 struct vm_struct *next;
28 void *addr;
29 unsigned long size;
30 unsigned long flags;
31 struct page **pages;
32 unsigned int nr_pages;
33 phys_addr_t phys_addr;
34 void *caller;
35};
36
37
38
39
40extern void vm_unmap_ram(const void *mem, unsigned int count);
41extern void *vm_map_ram(struct page **pages, unsigned int count,
42 int node, pgprot_t prot);
43extern void vm_unmap_aliases(void);
44
45#ifdef CONFIG_MMU
46extern void __init vmalloc_init(void);
47#else
48static inline void vmalloc_init(void)
49{
50}
51#endif
52
53extern void *vmalloc(unsigned long size);
54extern void *vzalloc(unsigned long size);
55extern void *vmalloc_user(unsigned long size);
56extern void *vmalloc_node(unsigned long size, int node);
57extern void *vzalloc_node(unsigned long size, int node);
58extern void *vmalloc_exec(unsigned long size);
59extern void *vmalloc_32(unsigned long size);
60extern void *vmalloc_32_user(unsigned long size);
61extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
62extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
63 unsigned long start, unsigned long end, gfp_t gfp_mask,
64 pgprot_t prot, int node, void *caller);
65extern void vfree(const void *addr);
66
67extern void *vmap(struct page **pages, unsigned int count,
68 unsigned long flags, pgprot_t prot);
69extern void vunmap(const void *addr);
70
71extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
72 unsigned long pgoff);
73void vmalloc_sync_all(void);
74
75
76
77
78
79static inline size_t get_vm_area_size(const struct vm_struct *area)
80{
81
82 return area->size - PAGE_SIZE;
83}
84
85extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
86extern struct vm_struct *get_vm_area_caller(unsigned long size,
87 unsigned long flags, void *caller);
88extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
89 unsigned long start, unsigned long end);
90extern struct vm_struct *__get_vm_area_caller(unsigned long size,
91 unsigned long flags,
92 unsigned long start, unsigned long end,
93 void *caller);
94extern struct vm_struct *remove_vm_area(const void *addr);
95
96extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
97 struct page ***pages);
98extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
99 pgprot_t prot, struct page **pages);
100extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
101extern void unmap_kernel_range(unsigned long addr, unsigned long size);
102
103
104extern struct vm_struct *alloc_vm_area(size_t size);
105extern void free_vm_area(struct vm_struct *area);
106
107
108extern long vread(char *buf, char *addr, unsigned long count);
109extern long vwrite(char *buf, char *addr, unsigned long count);
110
111
112
113
114extern rwlock_t vmlist_lock;
115extern struct vm_struct *vmlist;
116extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
117
118#ifdef CONFIG_SMP
119struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
120 const size_t *sizes, int nr_vms,
121 size_t align);
122
123void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
124#endif
125
126#endif
127