1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *
4 *   Copyright (c) International Business Machines Corp., 2001
5 */
6
7/*
8 * hugetlb.h - common definitions for the hugepage tests
9 */
10
11#ifndef __HUGETLB_H
12#define __HUGETLB_H
13
14#include <stdlib.h>
15#include <sys/ipc.h>
16#include <sys/shm.h>
17#include <errno.h>
18#include <sys/wait.h>
19#include "tst_test.h"
20#include "old_tmpdir.h"
21#include "mem.h"
22
23#define PALIGN(p, a) ((void *)LTP_ALIGN((unsigned long)(p), (a)))
24
25#define SHM_RD	0400
26#define SHM_WR	0200
27#define SHM_RW	(SHM_RD|SHM_WR)
28
29#ifndef SHM_HUGETLB
30#define SHM_HUGETLB	04000	/* segment is mapped via hugetlb */
31#endif
32
33#ifndef barrier
34# ifdef mb
35	/* Redefining the mb() */
36#   define barrier() mb()
37# else
38#   define barrier() __asm__ __volatile__ ("" : : : "memory")
39# endif
40#endif
41
42/* Check if hugetlb page is gigantic */
43static inline int is_hugetlb_gigantic(unsigned long hpage_size)
44{
45	return (hpage_size / getpagesize()) >> 11;
46}
47
48/*
49 * to get the lower nine permission bits
50 * from shmid_ds.ipc_perm.mode
51 */
52#define MODE_MASK	0x01FF
53
54extern key_t shmkey;			/* an IPC key generated by ftok() */
55
56int getipckey(void);
57int getuserid(char *user);
58void rm_shm(int shm_id);
59int do_readback(void *p, size_t size, char *desc);
60#endif /* hugetlb.h */
61