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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/barrier.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <preemption.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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 * Use atomic compare and swap operation to atomically add signed value.
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 * Use atomic compare and swap operation to atomically add signed value.
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 *
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 *
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    do {
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    do {
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        volatile uintptr_t x = (uint64_t) &val->count;
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        volatile uintptr_t x = (uint64_t) &val->count;
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        a = *((uint64_t *) x);
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        a = *((uint64_t *) x);
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        b = a + i;
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        b = a + i;
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        asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *)x)), "+r" (b) : "r" (a));
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        asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *)x)),
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            "+r" (b) : "r" (a));
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    } while (a != b);
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    } while (a != b);
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    return a;
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    return a;
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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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static inline long test_and_set(atomic_t *val)
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{
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{
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    uint64_t v = 1;
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    uint64_t v = 1;
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    volatile uintptr_t x = (uint64_t) &val->count;
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    volatile uintptr_t x = (uint64_t) &val->count;
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    asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *) x)), "+r" (v) : "r" (0));
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    asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *) x)),
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        "+r" (v) : "r" (0));
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    return v;
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    return v;
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}
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}
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static inline void atomic_lock_arch(atomic_t *val)
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static inline void atomic_lock_arch(atomic_t *val)
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    uint64_t tmp1 = 1;
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    uint64_t tmp1 = 1;
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    uint64_t tmp2 = 0;
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    uint64_t tmp2 = 0;
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    volatile uintptr_t x = (uint64_t) &val->count;
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    volatile uintptr_t x = (uint64_t) &val->count;
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    preemption_disable();
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    asm volatile (
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    asm volatile (
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    "0:\n"
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    "0:\n"
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        "casx %0, %3, %1\n"
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        "casx %0, %3, %1\n"
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        "brz %1, 2f\n"
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        "brz %1, 2f\n"
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        "nop\n"
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        "nop\n"