1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2018 ARM Limited
4 */
5#ifndef __COMPAT_BARRIER_H
6#define __COMPAT_BARRIER_H
7
8#ifndef __ASSEMBLY__
9/*
10 * Warning: This code is meant to be used with
11 * ENABLE_COMPAT_VDSO only.
12 */
13#ifndef ENABLE_COMPAT_VDSO
14#error This header is meant to be used with ENABLE_COMPAT_VDSO only
15#endif
16
17#ifdef dmb
18#undef dmb
19#endif
20
21#define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
22
23#define aarch32_smp_mb()	dmb(ish)
24#define aarch32_smp_rmb()	dmb(ishld)
25#define aarch32_smp_wmb()	dmb(ishst)
26
27#undef smp_mb
28#undef smp_rmb
29#undef smp_wmb
30
31#define smp_mb()	aarch32_smp_mb()
32#define smp_rmb()	aarch32_smp_rmb()
33#define smp_wmb()	aarch32_smp_wmb()
34
35#endif /* !__ASSEMBLY__ */
36
37#endif /* __COMPAT_BARRIER_H */
38