The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/dec/mcclock_pad32.c

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    1 /*      $NetBSD: mcclock_pad32.c,v 1.16 2009/03/14 21:04:19 dsl Exp $   */
    2 
    3 /*
    4  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
    5  * All rights reserved.
    6  *
    7  * Author: Chris G. Demetriou
    8  *
    9  * Permission to use, copy, modify and distribute this software and
   10  * its documentation is hereby granted, provided that both the copyright
   11  * notice and this permission notice appear in all copies of the
   12  * software, derivative works or modified versions, and any portions
   13  * thereof, and that both notices appear in supporting documentation.
   14  *
   15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   18  *
   19  * Carnegie Mellon requests users of this software to return to
   20  *
   21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   22  *  School of Computer Science
   23  *  Carnegie Mellon University
   24  *  Pittsburgh PA 15213-3890
   25  *
   26  * any improvements or extensions that they make and grant Carnegie the
   27  * rights to redistribute these changes.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __KERNEL_RCSID(0, "$NetBSD: mcclock_pad32.c,v 1.16 2009/03/14 21:04:19 dsl Exp $");
   32 
   33 
   34 /*
   35  * mc1461818 (or compatible) clock chip driver,  for machines where each
   36  * byte-wide mcclock chip register is  mapped
   37  * into the low-order byte of a little-endian 32-bit word.
   38  *
   39  *  DECstation 2100/3100
   40  *  DECstation 5100
   41  *  DECstation 5000/200 baseboard
   42  *  IOCTL asic machines (Alpha  3000 series, Decstation 5000 series)
   43  *
   44  * bus-specific frontends should just declare an attach and match
   45  * entry, and set up a initializea switch to call the functions below.
   46  */
   47 
   48 #include <sys/param.h>
   49 #include <sys/kernel.h>
   50 #include <sys/systm.h>
   51 #include <sys/device.h>
   52 #include <dev/clock_subr.h>
   53 
   54 #include <machine/autoconf.h>
   55 #include <dev/dec/clockvar.h>
   56 #include <dev/dec/mcclockvar.h>
   57 #include <dev/ic/mc146818reg.h>
   58 
   59 #include <dev/dec/mcclock_pad32.h>
   60 
   61 
   62 void    mcclock_pad32_write(struct mcclock_softc *, u_int, u_int);
   63 u_int   mcclock_pad32_read(struct mcclock_softc *, u_int);
   64 
   65 const struct mcclock_busfns mcclock_pad32_busfns = {
   66         mcclock_pad32_write, mcclock_pad32_read,
   67 };
   68 
   69 void
   70 mcclock_pad32_write(struct mcclock_softc *dev, u_int reg, u_int datum)
   71 {
   72         struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev;
   73 
   74         sc->sc_dp[reg].datum = datum;
   75 }
   76 
   77 u_int
   78 mcclock_pad32_read(struct mcclock_softc *dev, u_int reg)
   79 {
   80         struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev;
   81 
   82         return (sc->sc_dp[reg].datum);
   83 }

Cache object: a27080d7ed5359f3c16102b0dc65d12b


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