baddev.hh revision 2539 
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
29/** @file
30 * This devices just panics when touched. For example if you have a
31 * kernel that touches the frame buffer which isn't allowed.
32 */
33
34#ifndef __DEV_BADDEV_HH__
35#define __DEV_BADDEV_HH__
36
37#include "base/range.hh"
38#include "dev/io_device.hh"
39
40
41/**
42 * BadDevice
43 * This device just panics when accessed. It is supposed to warn
44 * the user that the kernel they are running has unsupported
45 * options (i.e. frame buffer)
46 */
47class BadDevice : public BasicPioDevice
48{
49  private:
50    std::string devname;
51
52  public:
53    struct Params : public BasicPioDevice::Params
54    {
55        std::string device_name;
56    };
57  protected:
58    const Params *params() const { return (const Params *)_params; }
59
60  public:
61     /**
62      * Constructor for the Baddev Class.
63      * @param p object parameters
64      * @param a base address of the write
65      */
66    BadDevice(Params *p);
67
68    virtual Tick read(Packet &pkt);
69    virtual Tick write(Packet &pkt);
70};
71
72#endif // __DEV_BADDEV_HH__
73