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