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Diffstat (limited to 'src/mem/XBar.py')
-rw-r--r-- | src/mem/XBar.py | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/mem/XBar.py b/src/mem/XBar.py new file mode 100644 index 000000000..2aeefe132 --- /dev/null +++ b/src/mem/XBar.py @@ -0,0 +1,85 @@ +# Copyright (c) 2012 ARM Limited +# All rights reserved. +# +# The license below extends only to copyright in the software and shall +# not be construed as granting a license to any other intellectual +# property including but not limited to intellectual property relating +# to a hardware implementation of the functionality of the software +# licensed hereunder. You may use the software subject to the license +# terms below provided that you ensure that this notice is replicated +# unmodified and in its entirety in all distributions of the software, +# modified or unmodified, in source code or in binary form. +# +# Copyright (c) 2005-2008 The Regents of The University of Michigan +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer; +# redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution; +# neither the name of the copyright holders nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +# Authors: Nathan Binkert +# Andreas Hansson + +from MemObject import MemObject +from System import System +from m5.params import * +from m5.proxy import * +from m5.SimObject import SimObject + +class BaseXBar(MemObject): + type = 'BaseXBar' + abstract = True + cxx_header = "mem/xbar.hh" + slave = VectorSlavePort("vector port for connecting masters") + master = VectorMasterPort("vector port for connecting slaves") + header_cycles = Param.Cycles(1, "cycles of overhead per transaction") + width = Param.Unsigned(8, "xbar width (bytes)") + + # The default port can be left unconnected, or be used to connect + # a default slave port + default = MasterPort("Port for connecting an optional default slave") + + # The default port can be used unconditionally, or based on + # address range, in which case it may overlap with other + # ports. The default range is always checked first, thus creating + # a two-level hierarchical lookup. This is useful e.g. for the PCI + # xbar configuration. + use_default_range = Param.Bool(False, "Perform address mapping for " \ + "the default port") + +class NoncoherentXBar(BaseXBar): + type = 'NoncoherentXBar' + cxx_header = "mem/noncoherent_xbar.hh" + +class CoherentXBar(BaseXBar): + type = 'CoherentXBar' + cxx_header = "mem/coherent_xbar.hh" + + system = Param.System(Parent.any, "System that the crossbar belongs to.") + snoop_filter = Param.SnoopFilter(NULL, "Selected snoop filter.") + +class SnoopFilter(SimObject): + type = 'SnoopFilter' + cxx_header = "mem/snoop_filter.hh" + lookup_latency = Param.Cycles(3, "lookup latency (cycles)") + + system = Param.System(Parent.any, "System that the crossbar belongs to.") |