2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @(#)mman.h 8.2 (Berkeley) 1/9/95
38 #include <sys/cdefs.h>
39 #include <sys/_types.h>
43 * Inheritance for minherit()
45 #define INHERIT_SHARE 0
46 #define INHERIT_COPY 1
47 #define INHERIT_NONE 2
48 #define INHERIT_ZERO 3
52 * Protections are chosen from these bits, or-ed together
54 #define PROT_NONE 0x00 /* no permissions */
55 #define PROT_READ 0x01 /* pages can be read */
56 #define PROT_WRITE 0x02 /* pages can be written */
57 #define PROT_EXEC 0x04 /* pages can be executed */
59 #define _PROT_ALL (PROT_READ | PROT_WRITE | PROT_EXEC)
60 #define PROT_EXTRACT(prot) ((prot) & _PROT_ALL)
62 #define _PROT_MAX_SHIFT 16
63 #define PROT_MAX(prot) ((prot) << _PROT_MAX_SHIFT)
64 #define PROT_MAX_EXTRACT(prot) (((prot) >> _PROT_MAX_SHIFT) & _PROT_ALL)
68 * Flags contain sharing type and options.
69 * Sharing types; choose one.
71 #define MAP_SHARED 0x0001 /* share changes */
72 #define MAP_PRIVATE 0x0002 /* changes are private */
74 #define MAP_COPY MAP_PRIVATE /* Obsolete */
80 #define MAP_FIXED 0x0010 /* map addr must be exactly as requested */
83 #define MAP_RESERVED0020 0x0020 /* previously unimplemented MAP_RENAME */
84 #define MAP_RESERVED0040 0x0040 /* previously unimplemented MAP_NORESERVE */
85 #define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
86 #define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
87 #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
88 #define MAP_STACK 0x0400 /* region grows down, like a stack */
89 #define MAP_NOSYNC 0x0800 /* page to but do not sync underlying file */
94 #define MAP_FILE 0x0000 /* map from file (default) */
95 #define MAP_ANON 0x1000 /* allocated from memory, swap space */
97 #define MAP_ANONYMOUS MAP_ANON /* For compatibility. */
103 #define MAP_GUARD 0x00002000 /* reserve but don't map address range */
104 #define MAP_EXCL 0x00004000 /* for MAP_FIXED, fail if address is used */
105 #define MAP_NOCORE 0x00020000 /* dont include these pages in a coredump */
106 #define MAP_PREFAULT_READ 0x00040000 /* prefault mapping for reading */
108 #define MAP_32BIT 0x00080000 /* map in the low 2GB of address space */
112 * Request specific alignment (n == log2 of the desired alignment).
114 * MAP_ALIGNED_SUPER requests optimal superpage alignment, but does
115 * not enforce a specific alignment.
117 #define MAP_ALIGNED(n) ((n) << MAP_ALIGNMENT_SHIFT)
118 #define MAP_ALIGNMENT_SHIFT 24
119 #define MAP_ALIGNMENT_MASK MAP_ALIGNED(0xff)
120 #define MAP_ALIGNED_SUPER MAP_ALIGNED(1) /* align on a superpage */
121 #endif /* __BSD_VISIBLE */
123 #if __POSIX_VISIBLE >= 199309
125 * Process memory locking
127 #define MCL_CURRENT 0x0001 /* Lock only current memory */
128 #define MCL_FUTURE 0x0002 /* Lock all future memory as well */
132 * Error return from mmap()
134 #define MAP_FAILED ((void *)-1)
139 #define MS_SYNC 0x0000 /* msync synchronously */
140 #define MS_ASYNC 0x0001 /* return immediately */
141 #define MS_INVALIDATE 0x0002 /* invalidate all cached data */
146 #define _MADV_NORMAL 0 /* no further special treatment */
147 #define _MADV_RANDOM 1 /* expect random page references */
148 #define _MADV_SEQUENTIAL 2 /* expect sequential page references */
149 #define _MADV_WILLNEED 3 /* will need these pages */
150 #define _MADV_DONTNEED 4 /* dont need these pages */
153 #define MADV_NORMAL _MADV_NORMAL
154 #define MADV_RANDOM _MADV_RANDOM
155 #define MADV_SEQUENTIAL _MADV_SEQUENTIAL
156 #define MADV_WILLNEED _MADV_WILLNEED
157 #define MADV_DONTNEED _MADV_DONTNEED
158 #define MADV_FREE 5 /* dont need these pages, and junk contents */
159 #define MADV_NOSYNC 6 /* try to avoid flushes to physical media */
160 #define MADV_AUTOSYNC 7 /* revert to default flushing strategy */
161 #define MADV_NOCORE 8 /* do not include these pages in a core file */
162 #define MADV_CORE 9 /* revert to including pages in a core file */
163 #define MADV_PROTECT 10 /* protect process from pageout kill */
166 * Return bits from mincore
168 #define MINCORE_INCORE 0x1 /* Page is incore */
169 #define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */
170 #define MINCORE_MODIFIED 0x4 /* Page has been modified by us */
171 #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
172 #define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */
173 #define MINCORE_SUPER 0x20 /* Page is a "super" page */
176 * Anonymous object constant for shm_open().
178 #define SHM_ANON ((char *)1)
179 #endif /* __BSD_VISIBLE */
182 * XXX missing POSIX_TYPED_MEM_* macros and
183 * posix_typed_mem_info structure.
185 #if __POSIX_VISIBLE >= 200112
186 #define POSIX_MADV_NORMAL _MADV_NORMAL
187 #define POSIX_MADV_RANDOM _MADV_RANDOM
188 #define POSIX_MADV_SEQUENTIAL _MADV_SEQUENTIAL
189 #define POSIX_MADV_WILLNEED _MADV_WILLNEED
190 #define POSIX_MADV_DONTNEED _MADV_DONTNEED
193 #ifndef _MODE_T_DECLARED
194 typedef __mode_t mode_t;
195 #define _MODE_T_DECLARED
198 #ifndef _OFF_T_DECLARED
199 typedef __off_t off_t;
200 #define _OFF_T_DECLARED
203 #ifndef _SIZE_T_DECLARED
204 typedef __size_t size_t;
205 #define _SIZE_T_DECLARED
208 #if defined(_KERNEL) || defined(_WANT_FILE)
209 #include <sys/lock.h>
210 #include <sys/mutex.h>
211 #include <sys/queue.h>
212 #include <sys/rangelock.h>
219 vm_object_t shm_object;
227 * Values maintained solely to make this a better-behaved file
228 * descriptor for fstat() to run on.
230 struct timespec shm_atime;
231 struct timespec shm_mtime;
232 struct timespec shm_ctime;
233 struct timespec shm_birthtime;
236 struct label *shm_label; /* MAC label */
237 const char *shm_path;
239 struct rangelock shm_rl;
245 int shm_map(struct file *fp, size_t size, off_t offset, void **memp);
246 int shm_unmap(struct file *fp, void *mem, size_t size);
248 int shm_access(struct shmfd *shmfd, struct ucred *ucred, int flags);
249 struct shmfd *shm_alloc(struct ucred *ucred, mode_t mode);
250 struct shmfd *shm_hold(struct shmfd *shmfd);
251 void shm_drop(struct shmfd *shmfd);
252 int shm_dotruncate(struct shmfd *shmfd, off_t length);
254 extern struct fileops shm_ops;
259 * XXX not yet implemented: posix_mem_offset(), posix_typed_mem_get_info(),
260 * posix_typed_mem_open().
263 int getpagesizes(size_t *, int);
264 int madvise(void *, size_t, int);
265 int mincore(const void *, size_t, char *);
266 int minherit(void *, size_t, int);
268 int mlock(const void *, size_t);
269 #ifndef _MMAP_DECLARED
270 #define _MMAP_DECLARED
271 void * mmap(void *, size_t, int, int, int, off_t);
273 int mprotect(void *, size_t, int);
274 int msync(void *, size_t, int);
275 int munlock(const void *, size_t);
276 int munmap(void *, size_t);
277 #if __POSIX_VISIBLE >= 200112
278 int posix_madvise(void *, size_t, int);
280 #if __POSIX_VISIBLE >= 199309
282 int munlockall(void);
283 int shm_open(const char *, int, mode_t);
284 int shm_unlink(const char *);
288 #endif /* !_KERNEL */
290 #endif /* !_SYS_MMAN_H_ */