sys/arch/mvme68k/stand/sboot/clock.c

   1 /*      $NetBSD: clock.c,v 1.5 2005/12/11 12:18:19 christos Exp $ */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratory.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)clock.c     8.1 (Berkeley) 6/11/93
  41  */
  42
  43 /*
  44  * Copyright (c) 1994 Gordon W. Ross
  45  * Copyright (c) 1993 Adam Glass
  46  *
  47  * This software was developed by the Computer Systems Engineering group
  48  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  49  * contributed to Berkeley.
  50  *
  51  * All advertising materials mentioning features or use of this software
  52  * must display the following acknowledgement:
  53  *      This product includes software developed by the University of
  54  *      California, Lawrence Berkeley Laboratory.
  55  *
  56  * Redistribution and use in source and binary forms, with or without
  57  * modification, are permitted provided that the following conditions
  58  * are met:
  59  * 1. Redistributions of source code must retain the above copyright
  60  *    notice, this list of conditions and the following disclaimer.
  61  * 2. Redistributions in binary form must reproduce the above copyright
  62  *    notice, this list of conditions and the following disclaimer in the
  63  *    documentation and/or other materials provided with the distribution.
  64  * 3. All advertising materials mentioning features or use of this software
  65  *    must display the following acknowledgement:
  66  *      This product includes software developed by the University of
  67  *      California, Berkeley and its contributors.
  68  * 4. Neither the name of the University nor the names of its contributors
  69  *    may be used to endorse or promote products derived from this software
  70  *    without specific prior written permission.
  71  *
  72  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  73  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  74  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  75  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  76  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  77  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  78  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  79  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  80  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  81  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  82  * SUCH DAMAGE.
  83  *
  84  *      @(#)clock.c     8.1 (Berkeley) 6/11/93
  85  */
  86
  87 /*
  88  * Clock driver.
  89  */
  90
  91 #include "sboot.h"
  92 #include "clockreg.h"
  93
  94 #include <machine/prom.h>
  95 #include "libsa.h"
  96
  97 static struct clockreg *clockreg = (struct clockreg *)CLOCK_ADDR;
  98
  99 /*
 100  * Set up the system's time, given a `reasonable' time value.
 101  */
 102 u_long time(void)
 103 {
 104         struct clockreg *cl = clockreg;
 105         int sec, min, hour, day, mon, year;
 106
 107         cl->cl_csr |= CLK_READ;         /* enable read (stop time) */
 108         sec = cl->cl_sec;
 109         min = cl->cl_min;
 110         hour = cl->cl_hour;
 111         day = cl->cl_mday;
 112         mon = cl->cl_month;
 113         year = cl->cl_year;
 114         cl->cl_csr &= ~CLK_READ;        /* time wears on */
 115         return chiptotime(sec, min, hour, day, mon, year);
 116 }