baddev.hh revision 4762 
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 */
30
31/** @file
32 * This devices just panics when touched. For example if you have a
33 * kernel that touches the frame buffer which isn't allowed.
34 */
35
36#ifndef __DEV_BADDEV_HH__
37#define __DEV_BADDEV_HH__
38
39#include "base/range.hh"
40#include "dev/io_device.hh"
41#include "params/BadDevice.hh"
42
43/**
44 * BadDevice
45 * This device just panics when accessed. It is supposed to warn
46 * the user that the kernel they are running has unsupported
47 * options (i.e. frame buffer)
48 */
49class BadDevice : public BasicPioDevice
50{
51  private:
52    std::string devname;
53
54  public:
55    typedef BadDeviceParams Params;
56
57  protected:
58    const Params *
59    params() const
60    {
61        return dynamic_cast<const Params *>(_params);
62    }
63
64  public:
65     /**
66      * Constructor for the Baddev Class.
67      * @param p object parameters
68      * @param a base address of the write
69      */
70    BadDevice(Params *p);
71
72    virtual Tick read(PacketPtr pkt);
73    virtual Tick write(PacketPtr pkt);
74};
75
76#endif // __DEV_BADDEV_HH__
77