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/* $OpenBSD: atomic.h,v 1.7 2014/06/19 11:29:21 kettenis Exp $ */
/* Public Domain */
#ifndef _POWERPC_ATOMIC_H_
#define _POWERPC_ATOMIC_H_
#if defined(_KERNEL)
static __inline void
atomic_setbits_int(volatile unsigned int *uip, unsigned int v)
{
unsigned int tmp;
__asm volatile (
"1: lwarx %0, 0, %2 \n"
" or %0, %1, %0 \n"
" stwcx. %0, 0, %2 \n"
" bne- 1b \n"
" sync" : "=&r" (tmp) : "r" (v), "r" (uip) : "cc", "memory");
}
static __inline void
atomic_clearbits_int(volatile unsigned int *uip, unsigned int v)
{
unsigned int tmp;
__asm volatile (
"1: lwarx %0, 0, %2 \n"
" andc %0, %0, %1 \n"
" stwcx. %0, 0, %2 \n"
" bne- 1b \n"
" sync" : "=&r" (tmp) : "r" (v), "r" (uip) : "cc", "memory");
}
#define __membar(_f) do { __asm __volatile(_f ::: "memory"); } while (0)
#ifdef MULTIPROCESSOR
#define membar_enter() __membar("isync")
#define membar_exit() __membar("sync")
#define membar_producer() __membar("sync")
#define membar_consumer() __membar("isync")
#define membar_sync() __membar("sync")
#else
#define membar_enter() __membar("")
#define membar_exit() __membar("")
#define membar_producer() __membar("")
#define membar_consumer() __membar("")
#define membar_sync() __membar("")
#endif
#endif /* defined(_KERNEL) */
#endif /* _POWERPC_ATOMIC_H_ */
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