48 lines
657 B
C
48 lines
657 B
C
#include "spin_lock.h"
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#include "cpu.h"
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#include "intr.h"
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void
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spin_init(struct spin_lock *lock)
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{
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if (lock != NULL)
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{
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lock->val = 0;
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}
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}
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void
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spin_lock(struct spin_lock *lock)
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{
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if (lock != NULL)
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{
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while (cmpxchg_32(&lock->val, 0, 1) != 0)
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{}
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}
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}
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void
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spin_unlock(struct spin_lock *lock)
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{
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if (lock != NULL)
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{
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lock->val = 0;
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}
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}
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uint64 spin_lock_irq_save(struct spin_lock* lock)
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{
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uint64 ret = READ_IRQ();
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WRITE_IRQ(0xf);
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spin_lock(lock);
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return ret;
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}
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void spin_unlock_irq_restore(struct spin_lock* lock, uint64 irq)
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{
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spin_unlock(lock);
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WRITE_IRQ(irq);
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}
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