| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #if defined(__aarch64__) |
| |
| #define hw_mb() __asm__ volatile("dmb osh" : : : "memory") |
| #define hw_rmb() __asm__ volatile("dmb oshld" : : : "memory") |
| #define hw_wmb() __asm__ volatile("dmb oshst" : : : "memory") |
| |
| #elif defined(__x86_64__) |
| |
| #define hw_mb() __asm__ volatile ("mfence" ::: "memory") |
| #define hw_rmb() __asm__ volatile ("lfence" ::: "memory") |
| #define hw_wmb() __asm__ volatile ("sfence" ::: "memory") |
| |
| #endif |
