1 /* $NetBSD: clock.c,v 1.5 2014/11/21 00:51:09 christos 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/clock_subr.h>
42 #include <dev/ic/mc146818reg.h>
43
44 #include <mips/cpuregs.h>
45
46 #include "boot.h"
47
48 #define DELAY_CALIBRATE 1000
49
50 #define MCCLOCK_BASE 0x10000070
51 #define MCCLOCK_REG 0
52 #define MCCLOCK_DATA 1
53
54 void
delay(int ms)55 delay(int ms)
56 {
57 /*
58 * XXX need *real* clock calibration.
59 */
60 volatile register int N = ms * DELAY_CALIBRATE;
61 for (; --N;)
62 __insn_barrier();
63 }
64
65 satime_t
getsecs(void)66 getsecs(void)
67 {
68 volatile uint8_t *mcclock_reg, *mcclock_data;
69 u_int sec;
70
71 mcclock_reg = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_REG);
72 mcclock_data = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_DATA);
73
74 *mcclock_reg = MC_SEC;
75 sec = bcdtobin(*mcclock_data);
76 *mcclock_reg = MC_MIN;
77 sec += bcdtobin(*mcclock_data) * 60;
78 *mcclock_reg = MC_HOUR;
79 sec += bcdtobin(*mcclock_data) * 60 * 60;
80
81 return (satime_t)sec;
82 }
83