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Annotation of 42BSD/sys/vax/param.h, revision 1.1.1.1

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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