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/* $OpenBSD: atomic.h,v 1.6 2010/04/21 03:03:25 deraadt Exp $ */
/* Public Domain */
#ifndef __ARM_ATOMIC_H__
#define __ARM_ATOMIC_H__
#if defined(_KERNEL)
#include <arm/armreg.h>
#include <arm/cpufunc.h>
/*
* on pre-v6 arm processors, it is necessary to disable interrupts if
* in the kernel and atomic updates are necessary without full mutexes
*/
static __inline void
atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
{
int oldirqstate;
oldirqstate = disable_interrupts(I32_bit|F32_bit);
*uip |= v;
restore_interrupts(oldirqstate);
}
static __inline void
atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
{
int oldirqstate;
oldirqstate = disable_interrupts(I32_bit|F32_bit);
*uip &= ~v;
restore_interrupts(oldirqstate);
}
#endif /* defined(_KERNEL) */
#endif /* __ARM_ATOMIC_H__ */
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