1
2#ifndef _LINUX_MMAN_H
3#define _LINUX_MMAN_H
4
5#include <linux/mm.h>
6#include <linux/percpu_counter.h>
7
8#include <linux/atomic.h>
9#include <uapi/linux/mman.h>
10
11
12
13
14
15#ifndef MAP_32BIT
16#define MAP_32BIT 0
17#endif
18#ifndef MAP_HUGE_2MB
19#define MAP_HUGE_2MB 0
20#endif
21#ifndef MAP_HUGE_1GB
22#define MAP_HUGE_1GB 0
23#endif
24#ifndef MAP_UNINITIALIZED
25#define MAP_UNINITIALIZED 0
26#endif
27#ifndef MAP_SYNC
28#define MAP_SYNC 0
29#endif
30
31
32
33
34
35
36
37
38#define LEGACY_MAP_MASK (MAP_SHARED \
39 | MAP_PRIVATE \
40 | MAP_FIXED \
41 | MAP_ANONYMOUS \
42 | MAP_DENYWRITE \
43 | MAP_EXECUTABLE \
44 | MAP_UNINITIALIZED \
45 | MAP_GROWSDOWN \
46 | MAP_LOCKED \
47 | MAP_NORESERVE \
48 | MAP_POPULATE \
49 | MAP_NONBLOCK \
50 | MAP_STACK \
51 | MAP_HUGETLB \
52 | MAP_32BIT \
53 | MAP_HUGE_2MB \
54 | MAP_HUGE_1GB)
55
56extern int sysctl_overcommit_memory;
57extern int sysctl_overcommit_ratio;
58extern unsigned long sysctl_overcommit_kbytes;
59extern struct percpu_counter vm_committed_as;
60
61#ifdef CONFIG_SMP
62extern s32 vm_committed_as_batch;
63extern void mm_compute_batch(int overcommit_policy);
64#else
65#define vm_committed_as_batch 0
66static inline void mm_compute_batch(int overcommit_policy)
67{
68}
69#endif
70
71unsigned long vm_memory_committed(void);
72
73static inline void vm_acct_memory(long pages)
74{
75 percpu_counter_add_batch(&vm_committed_as, pages, vm_committed_as_batch);
76}
77
78static inline void vm_unacct_memory(long pages)
79{
80 vm_acct_memory(-pages);
81}
82
83
84
85
86
87
88#ifndef arch_calc_vm_prot_bits
89#define arch_calc_vm_prot_bits(prot, pkey) 0
90#endif
91
92#ifndef arch_calc_vm_flag_bits
93#define arch_calc_vm_flag_bits(flags) 0
94#endif
95
96#ifndef arch_vm_get_page_prot
97#define arch_vm_get_page_prot(vm_flags) __pgprot(0)
98#endif
99
100#ifndef arch_validate_prot
101
102
103
104
105
106
107static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
108{
109 return (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM)) == 0;
110}
111#define arch_validate_prot arch_validate_prot
112#endif
113
114#ifndef arch_validate_flags
115
116
117
118
119
120static inline bool arch_validate_flags(unsigned long flags)
121{
122 return true;
123}
124#define arch_validate_flags arch_validate_flags
125#endif
126
127
128
129
130
131
132
133#define _calc_vm_trans(x, bit1, bit2) \
134 ((!(bit1) || !(bit2)) ? 0 : \
135 ((bit1) <= (bit2) ? ((x) & (bit1)) * ((bit2) / (bit1)) \
136 : ((x) & (bit1)) / ((bit1) / (bit2))))
137
138
139
140
141static inline unsigned long
142calc_vm_prot_bits(unsigned long prot, unsigned long pkey)
143{
144 return _calc_vm_trans(prot, PROT_READ, VM_READ ) |
145 _calc_vm_trans(prot, PROT_WRITE, VM_WRITE) |
146 _calc_vm_trans(prot, PROT_EXEC, VM_EXEC) |
147 arch_calc_vm_prot_bits(prot, pkey);
148}
149
150
151
152
153static inline unsigned long
154calc_vm_flag_bits(unsigned long flags)
155{
156 return _calc_vm_trans(flags, MAP_GROWSDOWN, VM_GROWSDOWN ) |
157 _calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) |
158 _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
159 arch_calc_vm_flag_bits(flags);
160}
161
162unsigned long vm_commit_limit(void);
163#endif
164