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 */
52