1 /* ---------------------------------------------------------------------------- 2 * Copyright (c) Huawei Technologies Co., Ltd. 2022-2023. All rights reserved. 3 * Description : Barrier HeadFile 4 * Author: Huawei LiteOS Team 5 * Create : 2022-12-20 6 * Redistribution and use in source and binary forms, with or without modification, 7 * are permitted provided that the following conditions are met: 8 * 1. Redistributions of source code must retain the above copyright notice, this list of 9 * conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 11 * of conditions and the following disclaimer in the documentation and/or other materials 12 * provided with the distribution. 13 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 14 * to endorse or promote products derived from this software without specific prior written 15 * permission. 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 18 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * ---------------------------------------------------------------------------- */ 28 29 #ifndef _ARCH_BARRIER_H 30 #define _ARCH_BARRIER_H 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif /* __cplusplus */ 35 36 #define BARRIER() __asm__ volatile("" : : : "memory") 37 #define WFI() __asm__ __volatile__("wfi") 38 #define MB() __asm__ __volatile__("fence":::"memory") 39 #define DSB() MB() 40 #define DMB() MB() 41 #define ISB() MB() 42 43 /* Old Style APIs */ 44 #ifndef wfi 45 #define wfi WFI 46 #endif 47 48 #ifndef mb 49 #define mb MB 50 #endif 51 52 #ifndef dsb 53 #define dsb DSB 54 #endif 55 56 #ifndef dmb 57 #define dmb DMB 58 #endif 59 60 #ifndef isb 61 #define isb ISB 62 #endif 63 64 #ifdef __cplusplus 65 } 66 #endif /* __cplusplus */ 67 68 #endif /* _ARCH_BARRIER_H */ 69