arch/hexagon/include/asm/barrier.h

   1 /*
   2  * Memory barrier definitions for the Hexagon architecture
   3  *
   4  * Copyright (c) 2010-2011, The Linux Foundation. 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 */