/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_SHMBUF_H
#define _ASM_SHMBUF_H

#include <asm/ipcbuf.h>
#include <asm/posix_types.h>

/*
 * The shmid64_ds structure for the MIPS architecture.
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * As MIPS was lacking proper padding after shm_?time, we use 48 bits
 * of the padding at the end to store a few additional bits of the time.
 * libc implementations need to take care to convert this into a proper
 * data structure when moving to 64-bit time_t.
 */

#ifdef __mips64
struct shmid64_ds {
        struct ipc64_perm       shm_perm;       /* operation perms */
        __kernel_size_t         shm_segsz;      /* size of segment (bytes) */
        long                    shm_atime;      /* last attach time */
        long                    shm_dtime;      /* last detach time */
        long                    shm_ctime;      /* last change time */
        __kernel_pid_t          shm_cpid;       /* pid of creator */
        __kernel_pid_t          shm_lpid;       /* pid of last operator */
        unsigned long           shm_nattch;     /* no. of current attaches */
        unsigned long           __unused1;
        unsigned long           __unused2;
};
#else
struct shmid64_ds {
        struct ipc64_perm       shm_perm;       /* operation perms */
        __kernel_size_t         shm_segsz;      /* size of segment (bytes) */
        unsigned long           shm_atime;      /* last attach time */
        unsigned long           shm_dtime;      /* last detach time */
        unsigned long           shm_ctime;      /* last change time */
        __kernel_pid_t          shm_cpid;       /* pid of creator */
        __kernel_pid_t          shm_lpid;       /* pid of last operator */
        unsigned long           shm_nattch;     /* no. of current attaches */
        unsigned short          shm_atime_high;
        unsigned short          shm_dtime_high;
        unsigned short          shm_ctime_high;
        unsigned short          __unused1;
};
#endif

struct shminfo64 {
        unsigned long   shmmax;
        unsigned long   shmmin;
        unsigned long   shmmni;
        unsigned long   shmseg;
        unsigned long   shmall;
        unsigned long   __unused1;
        unsigned long   __unused2;
        unsigned long   __unused3;
        unsigned long   __unused4;
};

#endif /* _ASM_SHMBUF_H */