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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);