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| 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 __ASSEMBLER__ |
| 9 | /* |
| 10 | * Warning: This code is meant to be used from the compat vDSO only. |
| 11 | */ |
| 12 | #ifdef __arch64__ |
| 13 | #error This header is meant to be used with from the compat vDSO only |
| 14 | #endif |
| 15 | |
| 16 | #ifdef dmb |
| 17 | #undef dmb |
| 18 | #endif |
| 19 | |
| 20 | #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") |
| 21 | |
| 22 | #define aarch32_smp_mb() dmb(ish) |
| 23 | #define aarch32_smp_rmb() dmb(ishld) |
| 24 | #define aarch32_smp_wmb() dmb(ishst) |
| 25 | |
| 26 | #undef smp_mb |
| 27 | #undef smp_rmb |
| 28 | #undef smp_wmb |
| 29 | |
| 30 | #define smp_mb() aarch32_smp_mb() |
| 31 | #define smp_rmb() aarch32_smp_rmb() |
| 32 | #define smp_wmb() aarch32_smp_wmb() |
| 33 | |
| 34 | #endif /* !__ASSEMBLER__ */ |
| 35 | |
| 36 | #endif /* __COMPAT_BARRIER_H */ |
| 37 |
Warning: This file is not a C or C++ file. It does not have highlighting.