Return to atomic.h CVS log

Up to [local] / sys / arch / powerpc / include

Annotation of sys/arch/powerpc/include/atomic.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: atomic.h,v 1.3 2007/03/17 22:10:04 kettenis Exp $     */
                      2:
                      3: /* Public Domain */
                      4:
                      5: #ifndef __POWERPC_ATOMIC_H__
                      6: #define __POWERPC_ATOMIC_H__
                      7:
                      8: #if defined(_KERNEL)
                      9:
                     10: static __inline void
                     11: atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
                     12: {
                     13:        unsigned int tmp;
                     14:
                     15:        __asm volatile (
                     16:            "1: lwarx   %0, 0, %2       \n"
                     17:            "   or      %0, %1, %0      \n"
                     18:            "   stwcx.  %0, 0, %2       \n"
                     19:            "   bne-    1b              \n"
                     20:            "   sync" : "=&r" (tmp) : "r" (v), "r" (uip) : "memory");
                     21: }
                     22:
                     23: static __inline void
                     24: atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
                     25: {
                     26:        unsigned int tmp;
                     27:
                     28:        __asm volatile (
                     29:            "1: lwarx   %0, 0, %2       \n"
                     30:            "   andc    %0, %0, %1      \n"
                     31:            "   stwcx.  %0, 0, %2       \n"
                     32:            "   bne-    1b              \n"
                     33:            "   sync" : "=&r" (tmp) : "r" (v), "r" (uip) : "memory");
                     34: }
                     35:
                     36: #endif /* defined(_KERNEL) */
                     37: #endif /* __POWERPC_ATOMIC_H__ */