usr/src/sys/vax/machparam.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)machparam.h 7.1 (Berkeley) 6/5/86
 */

/*
 * 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  10              /* 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)

#ifdef KERNEL
#ifndef LOCORE
int     cpuspeed;
#endif
#define DELAY(n)        { register int N = cpuspeed * (n); while (--N > 0); }

#else KERNEL
#define DELAY(n)        { register int N = (n); while (--N > 0); }
#endif KERNEL