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Annotation of sys/arch/sparc/sparc/clockreg.h, Revision 1.1.1.1

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