iopl.c

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * Copyright 1988, 1989, 1990, 1991 by Intel Corporation,
   28  * Santa Clara, California.
   29  * 
   30  *                          All Rights Reserved
   31  * 
   32  * Permission to use, copy, modify, and distribute this software and its
   33  * documentation for any purpose and without fee is hereby granted,
   34  * provided that the above copyright notice appears in all copies and that
   35  * both the copyright notice and this permission notice appear in
   36  * supporting documentation, and that the name of Intel not be used in
   37  * advertising or publicity pertaining to distribution of the software
   38  * without specific, written prior permission.
   39  * 
   40  * INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING
   41  * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
   42  * SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL
   43  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
   44  * PROFITS, WHETHER IN ACTION OF CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS
   45  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
   46  * THIS SOFTWARE.
   47  */
   48 /*
   49  * HISTORY
   50  * $Log:        iopl.c,v $
   51  * Revision 2.3  91/06/18  20:50:20  jsb
   52  *      New copyright from Intel.
   53  *      [91/06/18  20:06:41  jsb]
   54  * 
   55  * Revision 2.2  90/12/04  14:47:21  jsb
   56  *      First checkin.
   57  *      [90/12/04  10:56:56  jsb]
   58  * 
   59  */
   60 
   61 #include <mach/vm_prot.h>
   62 #include <mach/i386/vm_types.h>
   63 #include <mach/i386/vm_param.h>
   64 #include <device/io_req.h>
   65 #include <ipc/ipc_port.h>
   66 
   67 /*
   68  * IOPL device.
   69  */
   70 ipc_port_t      iopl_device_port = IP_NULL;
   71 
   72 int
   73 ioplopen(dev, flag, ior)
   74         int     dev;
   75         int     flag;
   76         io_req_t ior;
   77 {
   78         iopl_device_port = ior->io_device->port;
   79         return (0);
   80 }
   81 
   82 /*ARGSUSED*/
   83 int
   84 ioplclose(dev, flag)
   85         int     dev;
   86         int     flag;
   87 {
   88         iopl_device_port = IP_NULL;
   89         return (0);
   90 }
   91 
   92 /*ARGSUSED*/
   93 int
   94 ioplmmap(dev, off, prot)
   95         int             dev;
   96         vm_offset_t     off;
   97         vm_prot_t       prot;
   98 {
   99         if (off >= 0x60000)
  100             return (-1);
  101         return (i386_btop(0xa0000+off));
  102 }

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FreeBSD/Linux Kernel Cross Reference sys/i386ipsc/iopl.c

FreeBSD/Linux Kernel Cross Reference
sys/i386ipsc/iopl.c