1 #ifndef _ASMARM_BARRIER_H_ 2 #define _ASMARM_BARRIER_H_ 3 /* 4 * Adapted from arch/arm/include/asm/barrier.h 5 * 6 * Copyright (C) 2017, Red Hat Inc, Andrew Jones <drjones@redhat.com> 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2. 9 */ 10 11 #define sev() asm volatile("sev" : : : "memory") 12 #define wfe() asm volatile("wfe" : : : "memory") 13 #define wfi() asm volatile("wfi" : : : "memory") 14 #define yield() asm volatile("yield" : : : "memory") 15 #define cpu_relax() yield() 16 17 #define isb(option) __asm__ __volatile__ ("isb " #option : : : "memory") 18 #define dsb(option) __asm__ __volatile__ ("dsb " #option : : : "memory") 19 #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") 20 21 #define mb() dsb() 22 #define rmb() dsb() 23 #define wmb() dsb(st) 24 #define smp_mb() dmb(ish) 25 #define smp_rmb() smp_mb() 26 #define smp_wmb() dmb(ishst) 27 28 #endif /* _ASMARM_BARRIER_H_ */ 29