1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * include/asm-xtensa/shmbuf.h
4 *
5 * The shmid64_ds structure for Xtensa architecture.
6 * Note extra padding because this structure is passed back and forth
7 * between kernel and user space, but the padding is on the wrong
8 * side for big-endian xtensa, for historic reasons.
9 *
10 * Pad space is left for:
11 * - 2 miscellaneous 32-bit values
12 *
13 * This file is subject to the terms and conditions of the GNU General Public
14 * License. See the file "COPYING" in the main directory of this archive
15 * for more details.
16 *
17 * Copyright (C) 2001 - 2005 Tensilica Inc.
18 */
19
20 #ifndef _XTENSA_SHMBUF_H
21 #define _XTENSA_SHMBUF_H
22
23 struct shmid64_ds {
24 struct ipc64_perm shm_perm; /* operation perms */
25 size_t shm_segsz; /* size of segment (bytes) */
26 unsigned long shm_atime; /* last attach time */
27 unsigned long shm_atime_high;
28 unsigned long shm_dtime; /* last detach time */
29 unsigned long shm_dtime_high;
30 unsigned long shm_ctime; /* last change time */
31 unsigned long shm_ctime_high;
32 __kernel_pid_t shm_cpid; /* pid of creator */
33 __kernel_pid_t shm_lpid; /* pid of last operator */
34 unsigned long shm_nattch; /* no. of current attaches */
35 unsigned long __unused4;
36 unsigned long __unused5;
37 };
38
39 struct shminfo64 {
40 unsigned long shmmax;
41 unsigned long shmmin;
42 unsigned long shmmni;
43 unsigned long shmseg;
44 unsigned long shmall;
45 unsigned long __unused1;
46 unsigned long __unused2;
47 unsigned long __unused3;
48 unsigned long __unused4;
49 };
50
51 #endif /* _XTENSA_SHMBUF_H */