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 #include <asm/ipcbuf.h> 24 #include <asm/posix_types.h> 25 26 struct shmid64_ds { 27 struct ipc64_perm shm_perm; /* operation perms */ 28 __kernel_size_t shm_segsz; /* size of segment (bytes) */ 29 unsigned long shm_atime; /* last attach time */ 30 unsigned long shm_atime_high; 31 unsigned long shm_dtime; /* last detach time */ 32 unsigned long shm_dtime_high; 33 unsigned long shm_ctime; /* last change time */ 34 unsigned long shm_ctime_high; 35 __kernel_pid_t shm_cpid; /* pid of creator */ 36 __kernel_pid_t shm_lpid; /* pid of last operator */ 37 unsigned long shm_nattch; /* no. of current attaches */ 38 unsigned long __unused4; 39 unsigned long __unused5; 40 }; 41 42 struct shminfo64 { 43 unsigned long shmmax; 44 unsigned long shmmin; 45 unsigned long shmmni; 46 unsigned long shmseg; 47 unsigned long shmall; 48 unsigned long __unused1; 49 unsigned long __unused2; 50 unsigned long __unused3; 51 unsigned long __unused4; 52 }; 53 54 #endif /* _XTENSA_SHMBUF_H */ 55