arch/xtensa/include/uapi/asm/shmbuf.h

   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 */