src/mem/AddrMapper.py

   1 # Copyright (c) 2012 ARM Limited
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  35 #
  36 # Authors: Andreas Hansson
  37
  38 from m5.params import *
  39 from m5.SimObject import SimObject
  40
  41 # An address mapper changes the packet addresses in going from the
  42 # slave port side of the mapper to the master port side. When the
  43 # slave port is queried for the address ranges, it also performs the
  44 # necessary range updates. Note that snoop requests that travel from
  45 # the master port (i.e. the memory side) to the slave port are
  46 # currently not modified.
  47 class AddrMapper(SimObject):
  48     type = 'AddrMapper'
  49     cxx_header = 'mem/addr_mapper.hh'
  50     abstract = True
  51
  52     # one port in each direction
  53     master = MasterPort("Master port")
  54     slave = SlavePort("Slave port")
  55
  56
  57 # Range address mapper that maps a set of original ranges to a set of
  58 # remapped ranges, where a specific range is of the same size
  59 # (original and remapped), only with an offset.
  60 class RangeAddrMapper(AddrMapper):
  61     type = 'RangeAddrMapper'
  62     cxx_header = 'mem/addr_mapper.hh'
  63
  64     # These two vectors should be the exact same length and each range
  65     # should be the exact same size. Each range in original_ranges is
  66     # mapped to the corresponding element in the remapped_ranges. Note
  67     # that the same range can occur multiple times in the remapped
  68     # ranges for address aliasing.
  69     original_ranges = VectorParam.AddrRange(
  70         "Ranges of memory that should me remapped")
  71     remapped_ranges = VectorParam.AddrRange(
  72         "Ranges of memory that are being mapped to")