src/dev/sparc/mm_disk.hh

   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
  43 class 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