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      1 #ifndef	__HPET__
      2 #define	__HPET__ 1
      3 
      4 
      5 
      6 struct hpet_info {
      7 	unsigned long hi_ireqfreq;	/* Hz */
      8 	unsigned long hi_flags;	/* information */
      9 	unsigned short hi_hpet;
     10 	unsigned short hi_timer;
     11 };
     12 
     13 #define	HPET_INFO_PERIODIC	0x0001	/* timer is periodic */
     14 
     15 #define	HPET_IE_ON	_IO('h', 0x01)	/* interrupt on */
     16 #define	HPET_IE_OFF	_IO('h', 0x02)	/* interrupt off */
     17 #define	HPET_INFO	_IOR('h', 0x03, struct hpet_info)
     18 #define	HPET_EPI	_IO('h', 0x04)	/* enable periodic */
     19 #define	HPET_DPI	_IO('h', 0x05)	/* disable periodic */
     20 #define	HPET_IRQFREQ	_IOW('h', 0x6, unsigned long)	/* IRQFREQ usec */
     21 
     22 #endif				/* !__HPET__ */
     23