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44 lines
954 B
44 lines
954 B
/* 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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