1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _ASM_SHMBUF_H
3 #define _ASM_SHMBUF_H
4
5 #include <asm/ipcbuf.h>
6 #include <asm/posix_types.h>
7
8 /*
9 * The shmid64_ds structure for the MIPS architecture.
10 * Note extra padding because this structure is passed back and forth
11 * between kernel and user space.
12 *
13 * As MIPS was lacking proper padding after shm_?time, we use 48 bits
14 * of the padding at the end to store a few additional bits of the time.
15 * libc implementations need to take care to convert this into a proper
16 * data structure when moving to 64-bit time_t.
17 */
18
19 #ifdef __mips64
20 struct shmid64_ds {
21 struct ipc64_perm shm_perm; /* operation perms */
22 __kernel_size_t shm_segsz; /* size of segment (bytes) */
23 long shm_atime; /* last attach time */
24 long shm_dtime; /* last detach time */
25 long shm_ctime; /* last change time */
26 __kernel_pid_t shm_cpid; /* pid of creator */
27 __kernel_pid_t shm_lpid; /* pid of last operator */
28 unsigned long shm_nattch; /* no. of current attaches */
29 unsigned long __unused1;
30 unsigned long __unused2;
31 };
32 #else
33 struct shmid64_ds {
34 struct ipc64_perm shm_perm; /* operation perms */
35 __kernel_size_t shm_segsz; /* size of segment (bytes) */
36 unsigned long shm_atime; /* last attach time */
37 unsigned long shm_dtime; /* last detach time */
38 unsigned long shm_ctime; /* last change time */
39 __kernel_pid_t shm_cpid; /* pid of creator */
40 __kernel_pid_t shm_lpid; /* pid of last operator */
41 unsigned long shm_nattch; /* no. of current attaches */
42 unsigned short shm_atime_high;
43 unsigned short shm_dtime_high;
44 unsigned short shm_ctime_high;
45 unsigned short __unused1;
46 };
47 #endif
48
49 struct shminfo64 {
50 unsigned long shmmax;
51 unsigned long shmmin;
52 unsigned long shmmni;
53 unsigned long shmseg;
54 unsigned long shmall;
55 unsigned long __unused1;
56 unsigned long __unused2;
57 unsigned long __unused3;
58 unsigned long __unused4;
59 };
60
61 #endif /* _ASM_SHMBUF_H */
62
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