mm_disk.hh revision 3898:42a529d97cf2 
1/*
2 * Copyright (c) 2006 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 device acts as a disk similar to the memory mapped disk device
33 * in legion. Any access is translated to an offset in the disk image.
34 */
35
36#ifndef __DEV_SPARC_MM_DISK_HH__
37#define __DEV_SPARC_MM_DISK_HH__
38
39#include "base/range.hh"
40#include "dev/io_device.hh"
41#include "dev/disk_image.hh"
42
43class MmDisk : public BasicPioDevice
44{
45  private:
46    DiskImage *image;
47    off_t curSector;
48    bool dirty;
49    union {
50        uint8_t bytes[SectorSize];
51        uint32_t words[SectorSize/4];
52    };
53
54  public:
55    struct Params : public BasicPioDevice::Params
56    {
57        DiskImage *image;
58    };
59  protected:
60    const Params *params() const { return (const Params*)_params; }
61
62  public:
63    MmDisk(Params *p);
64
65    virtual Tick read(PacketPtr pkt);
66    virtual Tick write(PacketPtr pkt);
67};
68
69#endif //__DEV_SPARC_MM_DISK_HH__
70
71