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Annotation of 43BSDTahoe/sys/vax/machparam.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)machparam.h 7.10 (Berkeley) 1/21/88
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Machine dependent constants for VAX.
        !            11:  */
        !            12: #define        MACHINE "vax"
        !            13: 
        !            14: #ifndef BYTE_ORDER
        !            15: #include <machine/endian.h>
        !            16: #endif
        !            17: 
        !            18: #define        CHAR_BIT        NBBY
        !            19: #define        CHAR_MAX        0x7f
        !            20: #define        CHAR_MIN        0x80
        !            21: #define        CLK_TCK         60                      /* for times() */
        !            22: #define        INT_MAX         0x7fffffff
        !            23: #define        INT_MIN         0x80000000
        !            24: #define        LONG_MAX        0x7fffffff
        !            25: #define        LONG_MIN        0x80000000
        !            26: #define        SCHAR_MAX       0x7f
        !            27: #define        SCHAR_MIN       0x80
        !            28: #define        SHRT_MAX        0x7fff
        !            29: #define        SHRT_MIN        0x8000
        !            30: #define        UCHAR_MAX       0xff
        !            31: #define        UINT_MAX        0xffffffff
        !            32: #define        ULONG_MAX       0xffffffff
        !            33: #define        USHRT_MAX       0xffff
        !            34: 
        !            35: #define        NBPG            512             /* bytes/page */
        !            36: #define        PGOFSET         (NBPG-1)        /* byte offset into page */
        !            37: #define        PGSHIFT         9               /* LOG2(NBPG) */
        !            38: #define        NPTEPG          (NBPG/(sizeof (struct pte)))
        !            39: 
        !            40: #define        KERNBASE        0x80000000      /* start of kernel virtual */
        !            41: #define        BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)
        !            42: 
        !            43: #define        DEV_BSIZE       512
        !            44: #define        DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
        !            45: #define BLKDEV_IOSIZE  2048
        !            46: #define        MAXPHYS         (63 * 1024)     /* max raw I/O transfer size */
        !            47: 
        !            48: #define        CLSIZE          2
        !            49: #define        CLSIZELOG2      1
        !            50: 
        !            51: #define        SSIZE           4               /* initial stack size/NBPG */
        !            52: #define        SINCR           4               /* increment of stack/NBPG */
        !            53: 
        !            54: #define        UPAGES          10              /* pages of u-area */
        !            55: 
        !            56: /*
        !            57:  * Some macros for units conversion
        !            58:  */
        !            59: /* Core clicks (512 bytes) to segments and vice versa */
        !            60: #define        ctos(x) (x)
        !            61: #define        stoc(x) (x)
        !            62: 
        !            63: /* Core clicks (512 bytes) to disk blocks */
        !            64: #define        ctod(x) (x)
        !            65: #define        dtoc(x) (x)
        !            66: #define        dtob(x) ((x)<<PGSHIFT)
        !            67: 
        !            68: /* clicks to bytes */
        !            69: #define        ctob(x) ((x)<<9)
        !            70: 
        !            71: /* bytes to clicks */
        !            72: #define        btoc(x) ((((unsigned)(x)+511)>>9))
        !            73: 
        !            74: #define        btodb(bytes)                    /* calculates (bytes / DEV_BSIZE) */ \
        !            75:        ((unsigned)(bytes) >> DEV_BSHIFT)
        !            76: #define        dbtob(db)                       /* calculates (db * DEV_BSIZE) */ \
        !            77:        ((unsigned)(db) << DEV_BSHIFT)
        !            78: 
        !            79: /*
        !            80:  * Map a ``block device block'' to a file system block.
        !            81:  * This should be device dependent, and will be if we
        !            82:  * add an entry to cdevsw/bdevsw for that purpose.
        !            83:  * For now though just use DEV_BSIZE.
        !            84:  */
        !            85: #define        bdbtofsb(bn)    ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
        !            86: 
        !            87: /*
        !            88:  * Macros to decode processor status word.
        !            89:  */
        !            90: #define        USERMODE(ps)    (((ps) & PSL_CURMOD) == PSL_CURMOD)
        !            91: #define        BASEPRI(ps)     (((ps) & PSL_IPL) == 0)
        !            92: 
        !            93: #ifdef KERNEL
        !            94: #ifndef LOCORE
        !            95: int    cpuspeed;
        !            96: #define        DELAY(n)        { register int N = cpuspeed * (n); while (--N > 0); }
        !            97: #endif
        !            98: 
        !            99: #else KERNEL
        !           100: #define        DELAY(n)        { register int N = (n); while (--N > 0); }
        !           101: #endif KERNEL

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