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Annotation of sys/arch/sh/include/atomic.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: atomic.h,v 1.3 2007/04/05 17:35:11 miod Exp $ */
        !             2:
        !             3: /* Public Domain */
        !             4:
        !             5: #ifndef __SH_ATOMIC_H__
        !             6: #define __SH_ATOMIC_H__
        !             7:
        !             8: #if defined(_KERNEL)
        !             9:
        !            10: #include <sh/psl.h>
        !            11:
        !            12: static __inline void
        !            13: atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
        !            14: {
        !            15:        unsigned int sr;
        !            16:
        !            17:        __asm__ __volatile__ ("stc sr, %0" : "=r"(sr));
        !            18:        __asm__ __volatile__ ("ldc %0, sr" : : "r"(sr | PSL_IMASK));
        !            19:        *uip |= v;
        !            20:        __asm__ __volatile__ ("ldc %0, sr" : : "r"(sr));
        !            21: }
        !            22:
        !            23: static __inline void
        !            24: atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
        !            25: {
        !            26:        unsigned int sr;
        !            27:
        !            28:        __asm__ __volatile__ ("stc sr, %0" : "=r"(sr));
        !            29:        __asm__ __volatile__ ("ldc %0, sr" : : "r"(sr | PSL_IMASK));
        !            30:        *uip &= ~v;
        !            31:        __asm__ __volatile__ ("ldc %0, sr" : : "r"(sr));
        !            32: }
        !            33:
        !            34: #endif /* defined(_KERNEL) */
        !            35: #endif /* __SH_ATOMIC_H__ */