sys/arch/cobalt/stand/boot/clock.c

   1 /*      $NetBSD: clock.c,v 1.3 2008/04/28 20:23:16 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Manuel Bouyer.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/types.h>
  34 #include <lib/libsa/stand.h>
  35 #include <lib/libkern/libkern.h>
  36
  37 #include <netinet/in.h>
  38 #include <netinet/in_systm.h>
  39 #include <lib/libsa/net.h>
  40
  41 #include <dev/ic/mc146818reg.h>
  42
  43 #include <mips/cpuregs.h>
  44
  45 #include "boot.h"
  46
  47 #define DELAY_CALIBRATE 1000
  48
  49 #define MCCLOCK_BASE    0x10000070
  50 #define MCCLOCK_REG     0
  51 #define MCCLOCK_DATA    1
  52
  53 void
  54 delay(int ms)
  55 {
  56         /*
  57          * XXX need *real* clock calibration.
  58          */
  59         volatile register int N = ms * DELAY_CALIBRATE;
  60         for (; --N;)
  61                 __insn_barrier();
  62 }
  63
  64 satime_t
  65 getsecs(void)
  66 {
  67         volatile uint8_t *mcclock_reg, *mcclock_data;
  68         u_int sec;
  69
  70         mcclock_reg  = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_REG);
  71         mcclock_data = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_DATA);
  72
  73         *mcclock_reg = MC_SEC;
  74         sec  = bcdtobin(*mcclock_data);
  75         *mcclock_reg = MC_MIN;
  76         sec += bcdtobin(*mcclock_data) * 60;
  77         *mcclock_reg = MC_HOUR;
  78         sec += bcdtobin(*mcclock_data) * 60 * 60;
  79
  80         return (satime_t)sec;
  81 }