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 */
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 */
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#ifndef KERN_sparc64_ATOMIC_H_
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#ifndef KERN_sparc64_ATOMIC_H_
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#define KERN_sparc64_ATOMIC_H_
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#define KERN_sparc64_ATOMIC_H_
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#include <arch/barrier.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#include <typedefs.h>
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/** Atomic add operation.
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/** Atomic add operation.
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 *
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 *
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static inline void atomic_dec(atomic_t *val)
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static inline void atomic_dec(atomic_t *val)
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{
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{
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    (void) atomic_add(val, -1);
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    (void) atomic_add(val, -1);
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}
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}
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static inline long test_and_set(atomic_t *val)
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{
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    uint64_t v = 1;
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    __asm__ volatile ("casx %0, %2, %1\n" : "+m" (*val), "+r" (v) : "r" (0));
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    return v;
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}
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static inline void atomic_lock_arch(atomic_t *val)
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{
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    uint64_t tmp1 = 1;
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    uint64_t tmp2;
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    __asm__ volatile (
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    "0:\n"
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        "casx %0, %3, %1\n"
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        "brz %1, 2f\n"
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        "nop\n"
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    "1:\n"
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        "ldx %0, %2\n"
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        "brz %2, 0b\n"
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        "nop\n"
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        "ba 1b\n"
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        "nop\n"
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    "2:\n"
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        : "+m" (*val), "+r" (tmp1), "+r" (tmp2) : "r" (0)
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    );
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    /*
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     * Prevent critical section code from bleeding out this way up.
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     */
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    CS_ENTER_BARRIER();
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}
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */