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

/*	param.h	6.1	83/07/29	*/

/*
 * Machine dependent constants for vax.
 */
#define	NBPG	512		/* bytes/page */
#define	PGOFSET	(NBPG-1)	/* byte offset into page */
#define	PGSHIFT	9		/* LOG2(NBPG) */

#define	CLSIZE		2
#define	CLSIZELOG2	1

#define	SSIZE	4		/* initial stack size/NBPG */
#define	SINCR	4		/* increment of stack/NBPG */

#define	UPAGES	8		/* pages of u-area */

/*
 * Some macros for units conversion
 */
/* Core clicks (512 bytes) to segments and vice versa */
#define	ctos(x)	(x)
#define	stoc(x)	(x)

/* Core clicks (512 bytes) to disk blocks */
#define	ctod(x)	(x)
#define	dtoc(x)	(x)
#define	dtob(x)	((x)<<9)

/* clicks to bytes */
#define	ctob(x)	((x)<<9)

/* bytes to clicks */
#define	btoc(x)	((((unsigned)(x)+511)>>9))

/*
 * Macros to decode processor status word.
 */
#define	USERMODE(ps)	(((ps) & PSL_CURMOD) == PSL_CURMOD)
#define	BASEPRI(ps)	(((ps) & PSL_IPL) == 0)

#define	DELAY(n)	{ register int N = (n); while (--N > 0); }
Commit	Line	Data
61c578c4 C	1	/* param.h 6.1 83/07/29 */
	2
	3	/*
	4	* Machine dependent constants for vax.
	5	*/
	6	#define NBPG 512 /* bytes/page */
	7	#define PGOFSET (NBPG-1) /* byte offset into page */
	8	#define PGSHIFT 9 /* LOG2(NBPG) */
	9
	10	#define CLSIZE 2
	11	#define CLSIZELOG2 1
	12
	13	#define SSIZE 4 /* initial stack size/NBPG */
	14	#define SINCR 4 /* increment of stack/NBPG */
	15
	16	#define UPAGES 8 /* pages of u-area */
	17
	18	/*
	19	* Some macros for units conversion
	20	*/
	21	/* Core clicks (512 bytes) to segments and vice versa */
	22	#define ctos(x) (x)
	23	#define stoc(x) (x)
	24
	25	/* Core clicks (512 bytes) to disk blocks */
	26	#define ctod(x) (x)
	27	#define dtoc(x) (x)
	28	#define dtob(x) ((x)<<9)
	29
	30	/* clicks to bytes */
	31	#define ctob(x) ((x)<<9)
	32
	33	/* bytes to clicks */
	34	#define btoc(x) ((((unsigned)(x)+511)>>9))
	35
	36	/*
	37	* Macros to decode processor status word.
	38	*/
	39	#define USERMODE(ps) (((ps) & PSL_CURMOD) == PSL_CURMOD)
	40	#define BASEPRI(ps) (((ps) & PSL_IPL) == 0)
	41
	42	#define DELAY(n) { register int N = (n); while (--N > 0); }