45 lines
954 B
C
45 lines
954 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 ARM Limited
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*/
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#ifndef __COMPAT_BARRIER_H
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#define __COMPAT_BARRIER_H
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#ifndef __ASSEMBLY__
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/*
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* Warning: This code is meant to be used with
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* ENABLE_COMPAT_VDSO only.
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*/
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#ifndef ENABLE_COMPAT_VDSO
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#error This header is meant to be used with ENABLE_COMPAT_VDSO only
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#endif
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#ifdef dmb
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#undef dmb
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#endif
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#define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
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#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD)
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#define aarch32_smp_mb() dmb(ish)
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#define aarch32_smp_rmb() dmb(ishld)
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#define aarch32_smp_wmb() dmb(ishst)
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#else
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#define aarch32_smp_mb() dmb(ish)
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#define aarch32_smp_rmb() aarch32_smp_mb()
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#define aarch32_smp_wmb() dmb(ishst)
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#endif
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#undef smp_mb
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#undef smp_rmb
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#undef smp_wmb
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#define smp_mb() aarch32_smp_mb()
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#define smp_rmb() aarch32_smp_rmb()
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#define smp_wmb() aarch32_smp_wmb()
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#endif /* !__ASSEMBLY__ */
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#endif /* __COMPAT_BARRIER_H */
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