1 /* $NetBSD: clock.c,v 1.6 2024/01/07 07:58:34 isaki Exp $ */
2
3 /*
4 * Copyright (c) 2003 Tetsuya Isaki. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/types.h>
29 #include <sys/clock.h>
30 #include <lib/libsa/stand.h>
31 #include <lib/libsa/net.h>
32 #include "iocs.h"
33 #include "libx68k.h"
34 #include "consio.h" /* XXX: for MFP_TIMERC */
35
36 /* x68k's RTC is defunct 2079, so there is no y2100 problem. */
37
38 int rtc_offset;
39
40 const int yday[] = {
41 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
42 };
43
44 satime_t
getsecs(void)45 getsecs(void)
46 {
47 int val;
48 int sec, min, hour, day, mon, year;
49 int days, y;
50
51 /* Get date & time via IOCS */
52 val = IOCS_DATEBIN(IOCS_BINDATEGET());
53 year = ((val & 0x0fff0000) >> 16) + 1980;
54 mon = ((val & 0x0000ff00) >> 8);
55 day = (val & 0x000000ff);
56
57 val = IOCS_TIMEBIN(IOCS_TIMEGET());
58 hour = ((val & 0x00ff0000) >> 16);
59 min = ((val & 0x0000ff00) >> 8);
60 sec = (val & 0x000000ff);
61
62 /* simple sanity checks */
63 if (mon < 1 || mon > 12 || day < 1 || day > 31)
64 return 0;
65 if (hour > 23 || min > 59 || sec > 59)
66 return 0;
67
68 days = 0;
69 for (y = 1970; y < year; y++)
70 days += days_per_year(y);
71 days += yday[mon - 1] + day - 1;
72 if (is_leap_year(y) && mon > 2)
73 days++;
74
75 /* now we have days since Jan 1, 1970. the rest is easy... */
76 return (days * SECS_PER_DAY) + (hour * SECS_PER_HOUR)
77 + (min * SECS_PER_MINUTE) + sec + (rtc_offset * 60);
78 }
79
80 void
delay(int us)81 delay(int us)
82 {
83 int end;
84
85 /* sanity check */
86 if (us < 1)
87 return;
88
89 /*
90 * assume IPLROM initializes MFP Timer-C as following:
91 * - free run down count
92 * - 1/200 presclaer (50us with 4MHz clock)
93 *
94 * Note we can't change MFP_TCDR reload value (200)
95 * because awaitkey_1sec() in consio.c assumes that value.
96 */
97
98 /* handle >5ms delays first */
99 for (; us > 5000; us -= 5000) {
100 MFP_TIMERC = 200;
101 while (MFP_TIMERC >= 100)
102 continue;
103 }
104
105 /* count rest fractions */
106 end = 200 - (us / 50);
107 MFP_TIMERC = 200;
108 while (MFP_TIMERC >= end)
109 continue;
110 }
111