[unix-history] / usr / src / sys / vax / include / clock.h

/*	clock.h	4.1	%G%	*/

/*
 * VAX clock registers
 */

#define	ICCS_RUN	0x1
#define	ICCS_TRANS	0x10
#define	ICCS_SS		0x20
#define	ICCS_IE		0x40
#define	ICCS_INT	0x80
#define	ICCS_ERR	0x80000000
	
#define	SECDAY		((unsigned)(24*60*60))		/* seconds per day */
#define	SECYR		((unsigned)(365*SECDAY))	/* per common year */
/*
 * TODRZERO is the what the TODR should contain when the ``year'' begins.
 * The TODR should always contain a number between 0 and SECYR+SECDAY.
 */
#define	TODRZERO	((unsigned)(1<<28))

#define	YRREF		1970
#define	LEAPYEAR(year)	((year)%4==0 && year != 2000)	/* good till 2100 */

/*
 * Start a 60 HZ clock.
 */
#define	clkstart() {\
	mtpr(NICR, -16667);	/* 16.667 milli-seconds */\
	mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_TRANS+ICCS_INT+ICCS_ERR);\
}
#define	clkreld()	mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_INT+ICCS_ERR)

#define	clkwrap()	(((unsigned)mfpr(TODR) - TODRZERO)/100 > SECYR+SECDAY)
Commit	Line	Data
4e0c95d7	1	/* clock.h 4.1 %G% */
dc9546ae BJ	2
	3	/*
	4	* VAX clock registers
	5	*/
	6
	7	#define ICCS_RUN 0x1
	8	#define ICCS_TRANS 0x10
	9	#define ICCS_SS 0x20
	10	#define ICCS_IE 0x40
	11	#define ICCS_INT 0x80
	12	#define ICCS_ERR 0x80000000
	13
93359143 BJ	14	#define SECDAY ((unsigned)(246060)) /* seconds per day */
	15	#define SECYR ((unsigned)(365SECDAY)) / per common year */
	16	/*
	17	* TODRZERO is the what the TODR should contain when the ``year'' begins.
	18	* The TODR should always contain a number between 0 and SECYR+SECDAY.
	19	*/
	20	#define TODRZERO ((unsigned)(1<<28))
	21
	22	#define YRREF 1970
	23	#define LEAPYEAR(year) ((year)%4==0 && year != 2000) /* good till 2100 */
	24
	25	/*
	26	* Start a 60 HZ clock.
	27	*/
	28	#define clkstart() {\
	29	mtpr(NICR, -16667); /* 16.667 milli-seconds */\
	30	mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_TRANS+ICCS_INT+ICCS_ERR);\
	31	}
	32	#define clkreld() mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_INT+ICCS_ERR)
dc9546ae	33
93359143	34	#define clkwrap() (((unsigned)mfpr(TODR) - TODRZERO)/100 > SECYR+SECDAY)