Annotation of sys/arch/vax/include/clock.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: clock.h,v 1.6 2006/08/27 16:55:41 miod Exp $ */
2: /* $NetBSD: clock.h,v 1.4 1999/09/06 19:52:53 ragge Exp $ */
3: /*
4: * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed at Ludd, University of
18: * Lule}, Sweden and its contributors.
19: * 4. The name of the author may not be used to endorse or promote products
20: * derived from this software without specific prior written permission
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: /*
35: * Time constants. These are unlikely to change.
36: */
37: #define IS_LEAPYEAR(y) (((y % 4) == 0) && (y % 100))
38:
39: #define SEC_PER_MIN (60)
40: #define SEC_PER_HOUR (SEC_PER_MIN * 60)
41: #define SEC_PER_DAY (SEC_PER_HOUR * 24)
42: #define DAYSPERYEAR(y) (IS_LEAPYEAR(y) ? 366 : 365)
43: #define SECPERYEAR(y) (DAYSPERYEAR(y) * SEC_PER_DAY)
44:
45: #define CLKREAD_OK 0
46: #define CLKREAD_BAD -1
47: #define CLKREAD_WARN -2
48:
49: #define TODRBASE (1 << 28) /* Rumours say it comes from VMS */
50:
51: #define SEC_OFF 0
52: #define MIN_OFF 2
53: #define HR_OFF 4
54: #define WDAY_OFF 6
55: #define DAY_OFF 7
56: #define MON_OFF 8
57: #define YR_OFF 9
58: #define CSRA_OFF 10
59: #define CSRB_OFF 11
60: #define CSRD_OFF 13
61:
62: #define CSRA_UIP 0200
63: #define CSRB_SET 0200
64: #define CSRB_24 0002
65: #define CSRB_DM 0004
66: #define CSRD_VRT 0200
67:
68: /* Var's used when dealing with clock chip */
69: extern volatile short *clk_page;
70: extern int clk_adrshift, clk_tweak;
71:
72: /* Prototypes */
73: int generic_clkread(time_t);
74: void generic_clkwrite(void);
75: int chip_clkread(time_t);
76: void chip_clkwrite(void);
77: int missing_clkread(time_t);
78: void missing_clkwrite(void);
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