1 /* 2 * Memory barrier definitions for the Hexagon architecture 3 * 4 * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 and 8 * only version 2 as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 18 * 02110-1301, USA. 19 */ 20 21 #ifndef _ASM_BARRIER_H 22 #define _ASM_BARRIER_H 23 24 #define rmb() barrier() 25 #define read_barrier_depends() barrier() 26 #define wmb() barrier() 27 #define mb() barrier() 28 #define smp_rmb() barrier() 29 #define smp_read_barrier_depends() barrier() 30 #define smp_wmb() barrier() 31 #define smp_mb() barrier() 32 #define smp_mb__before_atomic_dec() barrier() 33 #define smp_mb__after_atomic_dec() barrier() 34 #define smp_mb__before_atomic_inc() barrier() 35 #define smp_mb__after_atomic_inc() barrier() 36 37 /* Set a value and use a memory barrier. Used by the scheduler somewhere. */ 38 #define set_mb(var, value) \ 39 do { var = value; mb(); } while (0) 40 41 #endif /* _ASM_BARRIER_H */ 42