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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#ifndef __ASM_BARRIER_H
#define __ASM_BARRIER_H
#define __sync() __asm__ __volatile__("dbar 0" : : : "memory")
#define fast_wmb() __sync()
#define fast_rmb() __sync()
#define fast_mb() __sync()
#define fast_iob() __sync()
#define wbflush() __sync()
#define wmb() fast_wmb()
#define rmb() fast_rmb()
#define mb() fast_mb()
#define iob() fast_iob()
/**
* array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise
* @index: array element index
* @size: number of elements in array
*
* Returns:
* 0 - (@index < @size)
*/
#define array_index_mask_nospec array_index_mask_nospec
static inline unsigned long array_index_mask_nospec(unsigned long index,
unsigned long size)
{
unsigned long mask;
__asm__ __volatile__(
"sltu %0, %1, %2\n\t"
#if (__SIZEOF_LONG__ == 4)
"sub.w %0, $r0, %0\n\t"
#elif (__SIZEOF_LONG__ == 8)
"sub.d %0, $r0, %0\n\t"
#endif
: "=r" (mask)
: "r" (index), "r" (size)
:);
return mask;
}
#include <asm-generic/barrier.h>
#endif /* __ASM_BARRIER_H */
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