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Annotation of 42BSD/sys/vax/param.h, revision 1.1

1.1     ! root        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); }

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