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# Copyright (c) 2012 ARM Limited
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#
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# to a hardware implementation of the functionality of the software
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#
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# Authors: Andreas Hansson
from m5.params import *
from MemObject import MemObject
# An address mapper changes the packet addresses in going from the
# slave port side of the mapper to the master port side. When the
# slave port is queried for the address ranges, it also performs the
# necessary range updates. Note that snoop requests that travel from
# the master port (i.e. the memory side) to the slave port are
# currently not modified.
class AddrMapper(MemObject):
type = 'AddrMapper'
cxx_header = 'mem/addr_mapper.hh'
abstract = True
# one port in each direction
master = MasterPort("Master port")
slave = SlavePort("Slave port")
# Range address mapper that maps a set of original ranges to a set of
# remapped ranges, where a specific range is of the same size
# (original and remapped), only with an offset.
class RangeAddrMapper(AddrMapper):
type = 'RangeAddrMapper'
cxx_header = 'mem/addr_mapper.hh'
# These two vectors should be the exact same length and each range
# should be the exact same size. Each range in original_ranges is
# mapped to the corresponding element in the remapped_ranges. Note
# that the same range can occur multiple times in the remapped
# ranges for address aliasing.
original_ranges = VectorParam.AddrRange(
"Ranges of memory that should me remapped")
remapped_ranges = VectorParam.AddrRange(
"Ranges of memory that are being mapped to")