src/dev/storage/DiskImage.py

   1 # Copyright (c) 2005-2007 The Regents of The University of Michigan
   2 # All rights reserved.
   3 #
   4 # Redistribution and use in source and binary forms, with or without
   5 # modification, are permitted provided that the following conditions are
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   7 # notice, this list of conditions and the following disclaimer;
   8 # redistributions in binary form must reproduce the above copyright
   9 # notice, this list of conditions and the following disclaimer in the
  10 # documentation and/or other materials provided with the distribution;
  11 # neither the name of the copyright holders nor the names of its
  12 # contributors may be used to endorse or promote products derived from
  13 # this software without specific prior written permission.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 #
  27 # Authors: Nathan Binkert
  28
  29 from m5.SimObject import SimObject
  30 from m5.params import *
  31 class DiskImage(SimObject):
  32     type = 'DiskImage'
  33     abstract = True
  34     cxx_header = "dev/storage/disk_image.hh"
  35     image_file = Param.String("disk image file")
  36     read_only = Param.Bool(False, "read only image")
  37
  38 class RawDiskImage(DiskImage):
  39     type = 'RawDiskImage'
  40     cxx_header = "dev/storage/disk_image.hh"
  41
  42 class CowDiskImage(DiskImage):
  43     type = 'CowDiskImage'
  44     cxx_header = "dev/storage/disk_image.hh"
  45     child = Param.DiskImage(RawDiskImage(read_only=True),
  46                             "child image")
  47     table_size = Param.Int(65536, "initial table size")
  48     image_file = ""