Home | History | Annotate | Line # | Download | only in boot
clock.c revision 1.4 
      1 /*	$NetBSD: clock.c,v 1.4 2009/01/12 11:32:43 tsutsui 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 }
     82