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Annotation of cci/sys/tahoe/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 TAHOE.
                      5:  */
                      6: #define        NBPG    1024            /* bytes/page */
                      7: #define        PGOFSET (NBPG-1)        /* byte offset into page */
                      8: #define        PGSHIFT 10              /* LOG2(NBPG) */
                      9: #define        MAXCKEY 255             /* Maximal allowed code key */
                     10: #define        MAXDKEY 255             /* Maximal allowed data key */
                     11: #define        NOFCKEY (MAXCKEY+1)     /* Includes 0 which is reserved */
                     12: #define        NOFDKEY (MAXDKEY+1)
                     13: 
                     14: #define        CLSIZE          1
                     15: #define        CLSIZELOG2      0
                     16: 
                     17: #define        SSIZE   2               /* initial stack size/NBPG */
                     18: #define        SINCR   2               /* increment of stack/NBPG */
                     19: 
                     20: #define        UPAGES  6               /* pages of u-area
                     21:        =sizeof struct user + page of red zone and 2 pages of kernel stack */
                     22: 
                     23: #define IOBASE 0xfff00000      /* Last megabyte of 4 giga */
                     24:                                /* corresponds to Versabus addresses */
                     25: 
                     26: /*
                     27:  * Some macros for units conversion
                     28:  */
                     29: /* Core clicks (1024 bytes) to segments and vice versa */
                     30: #define        ctos(x) (x)
                     31: #define        stoc(x) (x)
                     32: 
                     33: /* Core clicks (1024 bytes) to disk blocks */
                     34: #define        ctod(x) (x)
                     35: #define        dtoc(x) (x)
                     36: #define        dtob(x) ((x)<<PGSHIFT)
                     37: 
                     38: /* clicks to bytes */
                     39: #define        ctob(x) ((x)<<PGSHIFT)
                     40: 
                     41: /* bytes to clicks */
                     42: #define        btoc(x) ((((unsigned)(x)+NBPG-1) >> PGSHIFT))
                     43: 
                     44: /*
                     45:  * Macros to decode processor status word.
                     46:  */
                     47: #define        USERMODE(ps)    (((ps) & PSL_CURMOD) == PSL_CURMOD)
                     48: #define        BASEPRI(ps)     (((ps) & PSL_IPL) == 0)
                     49: 
                     50: #define        DELAY(n)        { register int N = 3*(n); while (--N > 0); }

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