/*
* Based on arch/arm/include/asm/barrier.h
*
* Copyright (C) 2012 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_BARRIER_H
#define __ASM_BARRIER_H

#ifndef __ASSEMBLY__

#define sev() asm volatile("sev" : : : "memory")
#define wfe() asm volatile("wfe" : : : "memory")
#define wfi() asm volatile("wfi" : : : "memory")

#define isb() asm volatile("isb" : : : "memory")
#define dsb() asm volatile("dsb sy" : : : "memory")

#define mb() dsb()
#define rmb() asm volatile("dsb ld" : : : "memory")
#define wmb() asm volatile("dsb st" : : : "memory")

#ifndef CONFIG_SMP
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#else
#define smp_mb() asm volatile("dmb ish" : : : "memory")
#define smp_rmb() asm volatile("dmb ishld" : : : "memory")
#define smp_wmb() asm volatile("dmb ishst" : : : "memory")
#endif

#define read_barrier_depends() do { } while(0)
#define smp_read_barrier_depends() do { } while(0)

#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
#define nop() asm volatile("nop");

#endif /* __ASSEMBLY__ */

#endif /* __ASM_BARRIER_H */