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/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#ifndef __ASM_CSKY_BARRIER_H
#define __ASM_CSKY_BARRIER_H
#ifndef __ASSEMBLY__
#define nop() asm volatile ("nop\n":::"memory")
/*
* sync: completion barrier, all sync.xx instructions
* guarantee the last response recieved by bus transaction
* made by ld/st instructions before sync.s
* sync.s: inherit from sync, but also shareable to other cores
* sync.i: inherit from sync, but also flush cpu pipeline
* sync.is: the same with sync.i + sync.s
*
* bar.brwarw: ordering barrier for all load/store instructions before it
* bar.brwarws: ordering barrier for all load/store instructions before it
* and shareable to other cores
* bar.brar: ordering barrier for all load instructions before it
* bar.brars: ordering barrier for all load instructions before it
* and shareable to other cores
* bar.bwaw: ordering barrier for all store instructions before it
* bar.bwaws: ordering barrier for all store instructions before it
* and shareable to other cores
*/
#ifdef CONFIG_CPU_HAS_CACHEV2
#define mb() asm volatile ("sync.s\n":::"memory")
#ifdef CONFIG_SMP
#define __smp_mb() asm volatile ("bar.brwarws\n":::"memory")
#define __smp_rmb() asm volatile ("bar.brars\n":::"memory")
#define __smp_wmb() asm volatile ("bar.bwaws\n":::"memory")
#endif /* CONFIG_SMP */
#define sync_is() asm volatile ("sync.is\n":::"memory")
#else /* !CONFIG_CPU_HAS_CACHEV2 */
#define mb() asm volatile ("sync\n":::"memory")
#endif
#include <asm-generic/barrier.h>
#endif /* __ASSEMBLY__ */
#endif /* __ASM_CSKY_BARRIER_H */
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