i8253.h 348 Bytes
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#ifndef ASM_X86__I8253_H
#define ASM_X86__I8253_H

/* i8253A PIT registers */
#define PIT_MODE		0x43
#define PIT_CH0			0x40
#define PIT_CH2			0x42

extern spinlock_t i8253_lock;

extern struct clock_event_device *global_clock_event;

extern void setup_pit_timer(void);

#define inb_pit		inb_p
#define outb_pit	outb_p

#endif /* ASM_X86__I8253_H */