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Annotation of sys/arch/sparc/sparc/clockreg.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: clockreg.h,v 1.5 2007/04/10 17:47:55 miod Exp $       */
        !             2: /*     $NetBSD: clockreg.h,v 1.5 1994/11/20 20:54:07 deraadt Exp $ */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1992, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * This software was developed by the Computer Systems Engineering group
        !             9:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
        !            10:  * contributed to Berkeley.
        !            11:  *
        !            12:  * All advertising materials mentioning features or use of this software
        !            13:  * must display the following acknowledgement:
        !            14:  *     This product includes software developed by the University of
        !            15:  *     California, Lawrence Berkeley Laboratory.
        !            16:  *
        !            17:  * Redistribution and use in source and binary forms, with or without
        !            18:  * modification, are permitted provided that the following conditions
        !            19:  * are met:
        !            20:  * 1. Redistributions of source code must retain the above copyright
        !            21:  *    notice, this list of conditions and the following disclaimer.
        !            22:  * 2. Redistributions in binary form must reproduce the above copyright
        !            23:  *    notice, this list of conditions and the following disclaimer in the
        !            24:  *    documentation and/or other materials provided with the distribution.
        !            25:  * 3. Neither the name of the University nor the names of its contributors
        !            26:  *    may be used to endorse or promote products derived from this software
        !            27:  *    without specific prior written permission.
        !            28:  *
        !            29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            39:  * SUCH DAMAGE.
        !            40:  *
        !            41:  *     @(#)clockreg.h  8.1 (Berkeley) 6/11/93
        !            42:  */
        !            43:
        !            44: #include <machine/idprom.h>
        !            45:
        !            46: /*
        !            47:  * Sun-4/Sun-4c/Sun-4m clock Mostek TOD clock.
        !            48:  */
        !            49:
        !            50: /*
        !            51:  * Mostek MK48T02 clock.
        !            52:  *
        !            53:  * The clock includes 2040 bytes of RAM, the last 32 of which serve to
        !            54:  * identify the kind of Sun 4c this is.
        !            55:  *
        !            56:  * or, the Mostek MK48T08 clock.
        !            57:  *
        !            58:  * This is used in the Sun 4m machines. It is identical to the MK48T02,
        !            59:  * except for being 8K in size. The following structure, then, describes
        !            60:  * the last 2K of its 8K address space. We simply ignore the first 6K..
        !            61:  */
        !            62: struct clockreg {
        !            63:        char    cl_nvram[2008];         /* `free' nonvolatile memory */
        !            64:        struct  idprom  cl_idprom;      /* `id prom' */
        !            65:        volatile u_char cl_csr;         /* control register */
        !            66:        volatile u_char cl_sec;         /* seconds (0..59; BCD) */
        !            67:        volatile u_char cl_min;         /* minutes (0..59; BCD) */
        !            68:        volatile u_char cl_hour;        /* hour (0..23; BCD) */
        !            69:        volatile u_char cl_wday;        /* weekday (1..7) */
        !            70:        volatile u_char cl_mday;        /* day in month (1..31; BCD) */
        !            71:        volatile u_char cl_month;       /* month (1..12; BCD) */
        !            72:        volatile u_char cl_year;        /* year (0..99; BCD) */
        !            73: };
        !            74:
        !            75: /* bits in cl_csr */
        !            76: #define        CLK_WRITE       0x80            /* want to write */
        !            77: #define        CLK_READ        0x40            /* want to read (freeze clock) */
        !            78:
        !            79: #define CLK_MK48T08_OFF        6*1024          /* struct clockreg is 6K forward */
        !            80:
        !            81: struct clockreg *clockreg;
        !            82:
        !            83: /*
        !            84:  * Machine dependent base year:
        !            85:  * Note: must be < 1970
        !            86:  */
        !            87: #define CLOCK_BASE_YEAR 1968