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Annotation of XNU/osfmk/i386/AT386/rtc.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /*
        !            26:  * HISTORY
        !            27:  * 
        !            28:  * Revision 1.1.1.1  1998/09/22 21:05:39  wsanchez
        !            29:  * Import of Mac OS X kernel (~semeria)
        !            30:  *
        !            31:  * Revision 1.1.1.1  1998/03/07 02:25:40  wsanchez
        !            32:  * Import of OSF Mach kernel (~mburg)
        !            33:  *
        !            34:  * Revision 1.1.6.1  1994/09/23  01:47:30  ezf
        !            35:  *     change marker to not FREE
        !            36:  *     [1994/09/22  21:20:22  ezf]
        !            37:  *
        !            38:  * Revision 1.1.2.3  1993/08/09  19:39:04  dswartz
        !            39:  *     Add ANSI prototypes - CR#9523
        !            40:  *     [1993/08/06  17:51:17  dswartz]
        !            41:  * 
        !            42:  * Revision 1.1.2.2  1993/06/02  23:21:32  jeffc
        !            43:  *     Added to OSF/1 R1.3 from NMK15.0.
        !            44:  *     [1993/06/02  21:03:17  jeffc]
        !            45:  * 
        !            46:  * Revision 1.1  1992/09/30  02:27:20  robert
        !            47:  *     Initial revision
        !            48:  * 
        !            49:  * $EndLog$
        !            50:  */
        !            51: /* CMU_HIST */
        !            52: /*
        !            53:  * Revision 2.7  91/05/14  16:30:03  mrt
        !            54:  *     Correcting copyright
        !            55:  * 
        !            56:  * Revision 2.6  91/03/16  14:47:03  rpd
        !            57:  *     Fixed ioctl definitions for ANSI C.
        !            58:  *     [91/02/20            rpd]
        !            59:  * 
        !            60:  * Revision 2.5  91/02/05  17:20:25  mrt
        !            61:  *     Changed to new Mach copyright
        !            62:  *     [91/02/01  17:47:16  mrt]
        !            63:  * 
        !            64:  * Revision 2.4  90/11/26  14:51:02  rvb
        !            65:  *     jsb bet me to XMK34, sigh ...
        !            66:  *     [90/11/26            rvb]
        !            67:  *     Synched 2.5 & 3.0 at I386q (r1.5.1.3) & XMK35 (r2.4)
        !            68:  *     [90/11/15            rvb]
        !            69:  * 
        !            70:  * Revision 1.5.1.2  90/07/27  11:27:06  rvb
        !            71:  *     Fix Intel Copyright as per B. Davies authorization.
        !            72:  *     [90/07/27            rvb]
        !            73:  * 
        !            74:  * Revision 2.2  90/05/03  15:46:11  dbg
        !            75:  *     First checkin.
        !            76:  * 
        !            77:  * Revision 1.5.1.1  90/01/08  13:29:46  rvb
        !            78:  *     Add Intel copyright.
        !            79:  *     [90/01/08            rvb]
        !            80:  * 
        !            81:  * Revision 1.5  89/09/25  12:27:37  rvb
        !            82:  *     File was provided by Intel 9/18/89.
        !            83:  *     [89/09/23            rvb]
        !            84:  * 
        !            85:  */
        !            86: /* CMU_ENDHIST */
        !            87: /* 
        !            88:  * Mach Operating System
        !            89:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !            90:  * All Rights Reserved.
        !            91:  * 
        !            92:  * Permission to use, copy, modify and distribute this software and its
        !            93:  * documentation is hereby granted, provided that both the copyright
        !            94:  * notice and this permission notice appear in all copies of the
        !            95:  * software, derivative works or modified versions, and any portions
        !            96:  * thereof, and that both notices appear in supporting documentation.
        !            97:  * 
        !            98:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            99:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !           100:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !           101:  * 
        !           102:  * Carnegie Mellon requests users of this software to return to
        !           103:  * 
        !           104:  *  Software Distribution Coordinator  or  [email protected]
        !           105:  *  School of Computer Science
        !           106:  *  Carnegie Mellon University
        !           107:  *  Pittsburgh PA 15213-3890
        !           108:  * 
        !           109:  * any improvements or extensions that they make and grant Carnegie Mellon
        !           110:  * the rights to redistribute these changes.
        !           111:  */
        !           112: /* 
        !           113:  */
        !           114: 
        !           115: /*
        !           116:  *   Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.
        !           117:  * 
        !           118:  *             All Rights Reserved
        !           119:  * 
        !           120:  * Permission to use, copy, modify, and distribute this software and
        !           121:  * its documentation for any purpose and without fee is hereby
        !           122:  * granted, provided that the above copyright notice appears in all
        !           123:  * copies and that both the copyright notice and this permission notice
        !           124:  * appear in supporting documentation, and that the name of Intel
        !           125:  * not be used in advertising or publicity pertaining to distribution
        !           126:  * of the software without specific, written prior permission.
        !           127:  * 
        !           128:  * INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
        !           129:  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
        !           130:  * IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
        !           131:  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
        !           132:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
        !           133:  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
        !           134:  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !           135:  */
        !           136: 
        !           137: #define RTC_ADDR       0x70    /* I/O port address for register select */
        !           138: #define RTC_DATA       0x71    /* I/O port address for data read/write */
        !           139: 
        !           140: /*
        !           141:  * Register A definitions
        !           142:  */
        !           143: #define RTC_A          0x0a    /* register A address */
        !           144: #define RTC_UIP                0x80    /* Update in progress bit */
        !           145: #define RTC_DIV0       0x00    /* Time base of 4.194304 MHz */
        !           146: #define RTC_DIV1       0x10    /* Time base of 1.048576 MHz */
        !           147: #define RTC_DIV2       0x20    /* Time base of 32.768 KHz */
        !           148: #define RTC_RATE6      0x06    /* interrupt rate of 976.562 */
        !           149: 
        !           150: /*
        !           151:  * Register B definitions
        !           152:  */
        !           153: #define RTC_B          0x0b    /* register B address */
        !           154: #define RTC_SET                0x80    /* stop updates for time set */
        !           155: #define RTC_PIE                0x40    /* Periodic interrupt enable */
        !           156: #define RTC_AIE                0x20    /* Alarm interrupt enable */
        !           157: #define RTC_UIE                0x10    /* Update ended interrupt enable */
        !           158: #define RTC_SQWE       0x08    /* Square wave enable */
        !           159: #define RTC_DM         0x04    /* Date mode, 1 = binary, 0 = BCD */
        !           160: #define RTC_HM         0x02    /* hour mode, 1 = 24 hour, 0 = 12 hour */
        !           161: #define RTC_DSE                0x01    /* Daylight savings enable */
        !           162: 
        !           163: /* 
        !           164:  * Register C definitions
        !           165:  */
        !           166: #define RTC_C          0x0c    /* register C address */
        !           167: #define RTC_IRQF       0x80    /* IRQ flag */
        !           168: #define RTC_PF         0x40    /* PF flag bit */
        !           169: #define RTC_AF         0x20    /* AF flag bit */
        !           170: #define RTC_UF         0x10    /* UF flag bit */
        !           171: 
        !           172: /*
        !           173:  * Register D definitions
        !           174:  */
        !           175: #define RTC_D          0x0d    /* register D address */
        !           176: #define RTC_VRT                0x80    /* Valid RAM and time bit */
        !           177: 
        !           178: #define RTC_NREG       0x0e    /* number of RTC registers */
        !           179: #define RTC_NREGP      0x0a    /* number of RTC registers to set time */
        !           180: 
        !           181: #define RTCRTIME       _IOR('c', 0x01, struct rtc_st) /* Read time from RTC */
        !           182: #define RTCSTIME       _IOW('c', 0x02, struct rtc_st) /* Set time into RTC */
        !           183: 
        !           184: struct rtc_st {
        !           185:        char    rtc_sec;
        !           186:        char    rtc_asec;
        !           187:        char    rtc_min;
        !           188:        char    rtc_amin;
        !           189:        char    rtc_hr;
        !           190:        char    rtc_ahr;
        !           191:        char    rtc_dow;
        !           192:        char    rtc_dom;
        !           193:        char    rtc_mon;
        !           194:        char    rtc_yr;
        !           195:        char    rtc_statusa;
        !           196:        char    rtc_statusb;
        !           197:        char    rtc_statusc;
        !           198:        char    rtc_statusd;
        !           199: };
        !           200: 
        !           201: /*
        !           202:  * this macro reads contents of real time clock to specified buffer 
        !           203:  */
        !           204: #define load_rtc(regs) \
        !           205: {\
        !           206:        register int i; \
        !           207:        \
        !           208:        for (i = 0; i < RTC_NREG; i++) { \
        !           209:                outb(RTC_ADDR, i); \
        !           210:                (regs)[i] = inb(RTC_DATA); \
        !           211:        } \
        !           212: }
        !           213: 
        !           214: /*
        !           215:  * this macro writes contents of specified buffer to real time clock 
        !           216:  */ 
        !           217: #define save_rtc(regs) \
        !           218: { \
        !           219:        register int i; \
        !           220:        for (i = 0; i < RTC_NREGP; i++) { \
        !           221:                outb(RTC_ADDR, i); \
        !           222:                outb(RTC_DATA, (regs)[i]);\
        !           223:        } \
        !           224: }      
        !           225: 
        !           226: 

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