interrupt.h

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#define LOW_PRIORITY 0x7FFFFFFF

#define HIGH_PRIORITY 0x80000000

#define NORMAL_PRIORITY 0

extern void enable_interrupt(void);

extern void disable_interrupt(void);

extern int register_irq(int idx, int priority,
                                int (*handler)(int, void *, void *), void *data);

extern int unregister_irq(int idx, int (*handler)(int, void *, void *), void *data);

extern void irq_local_restore(unsigned long value);

extern void irq_local_save(unsigned long *value);