/* * 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 7.10 (Berkeley) 1/21/88 */ /* * Machine dependent constants for VAX. */ #define MACHINE "vax" #ifndef BYTE_ORDER #include <machine/endian.h> #endif #define CHAR_BIT NBBY #define CHAR_MAX 0x7f #define CHAR_MIN 0x80 #define CLK_TCK 60 /* for times() */ #define INT_MAX 0x7fffffff #define INT_MIN 0x80000000 #define LONG_MAX 0x7fffffff #define LONG_MIN 0x80000000 #define SCHAR_MAX 0x7f #define SCHAR_MIN 0x80 #define SHRT_MAX 0x7fff #define SHRT_MIN 0x8000 #define UCHAR_MAX 0xff #define UINT_MAX 0xffffffff #define ULONG_MAX 0xffffffff #define USHRT_MAX 0xffff #define NBPG 512 /* bytes/page */ #define PGOFSET (NBPG-1) /* byte offset into page */ #define PGSHIFT 9 /* LOG2(NBPG) */ #define NPTEPG (NBPG/(sizeof (struct pte))) #define KERNBASE 0x80000000 /* start of kernel virtual */ #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) #define DEV_BSIZE 512 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define BLKDEV_IOSIZE 2048 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ #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)<<PGSHIFT) /* clicks to bytes */ #define ctob(x) ((x)<<9) /* bytes to clicks */ #define btoc(x) ((((unsigned)(x)+511)>>9)) #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ ((unsigned)(bytes) >> DEV_BSHIFT) #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ ((unsigned)(db) << DEV_BSHIFT) /* * Map a ``block device block'' to a file system block. * This should be device dependent, and will be if we * add an entry to cdevsw/bdevsw for that purpose. * For now though just use DEV_BSIZE. */ #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) /* * 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; #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } #endif #else KERNEL #define DELAY(n) { register int N = (n); while (--N > 0); } #endif KERNEL