blob: 2bd97a5c8af7140bde5d3f30759af50b4e3a6e92 (
plain) (
tree)
|
|
/* MN10300 memory barrier definitions
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef _ASM_BARRIER_H
#define _ASM_BARRIER_H
#define nop() asm volatile ("nop")
#define mb() asm volatile ("": : :"memory")
#define rmb() mb()
#define wmb() asm volatile ("": : :"memory")
#ifdef CONFIG_SMP
#define smp_mb() mb()
#define smp_rmb() rmb()
#define smp_wmb() wmb()
#define set_mb(var, value) do { xchg(&var, value); } while (0)
#else /* CONFIG_SMP */
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define set_mb(var, value) do { var = value; mb(); } while (0)
#endif /* CONFIG_SMP */
#define set_wmb(var, value) do { var = value; wmb(); } while (0)
#define read_barrier_depends() do {} while (0)
#define smp_read_barrier_depends() do {} while (0)
#endif /* _ASM_BARRIER_H */
|
