Return to clock.h CVS log

Up to [CSRG BSD Unix] / 43BSDReno / sys / tahoe

Annotation of 43BSDReno/sys/tahoe/clock.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution is only permitted until one year after the first shipment
                      6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
                      7:  * binary forms are permitted provided that: (1) source distributions retain
                      8:  * this entire copyright notice and comment, and (2) distributions including
                      9:  * binaries display the following acknowledgement:  This product includes
                     10:  * software developed by the University of California, Berkeley and its
                     11:  * contributors'' in the documentation or other materials provided with the
                     12:  * distribution and in all advertising materials mentioning features or use
                     13:  * of this software.  Neither the name of the University nor the names of
                     14:  * its contributors may be used to endorse or promote products derived from
                     15:  * this software without specific prior written permission.
                     16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     19:  *
                     20:  *     @(#)clock.h     7.3 (Berkeley) 6/28/90
                     21:  */
                     22: 
                     23: #define        SECDAY          ((unsigned)(24*60*60))          /* seconds per day */
                     24: #define        SECYR           ((unsigned)(365*SECDAY))        /* per common year */
                     25: 
                     26: #define        YRREF           1970
                     27: #define        LEAPYEAR(year)  ((year)%4==0)   /* good till time becomes negative */
                     28: 
                     29: /*
                     30:  * Software clock is software interrupt level 8
                     31:  */
                     32: #define        setsoftclock()  mtpr(SIRR, 0x8)
                     33: 
                     34: /*
                     35:  * To calculate value for interval timer register, we
                     36:  * use the fact that 20512 yields a 60hz clock.
                     37:  */
                     38: #define        hztocount(v)    ((20512*60) / (v))

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.