| # Copyright (c) 2010 Advanced Micro Devices, Inc. |
| # 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 |
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| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| from m5.params import * |
| from m5.objects import * |
| |
| from topologies.BaseTopology import SimpleTopology |
| |
| |
| class Crossbar(SimpleTopology): |
| description = "Crossbar" |
| |
| def makeTopology(self, options, network, IntLink, ExtLink, Router): |
| |
| # default values for link latency and router latency. |
| # Can be over-ridden on a per link/router basis |
| link_latency = options.link_latency # used by simple and garnet |
| router_latency = options.router_latency # only used by garnet |
| |
| # Create an individual router for each controller plus one more for |
| # the centralized crossbar. The large numbers of routers are needed |
| # because external links do not model outgoing bandwidth in the |
| # simple network, but internal links do. |
| # For garnet, one router suffices, use CrossbarGarnet.py |
| |
| routers = [Router(router_id=i) for i in range(len(self.nodes) + 1)] |
| xbar = routers[ |
| len(self.nodes) |
| ] # the crossbar router is the last router created |
| network.routers = routers |
| |
| ext_links = [ |
| ExtLink( |
| link_id=i, |
| ext_node=n, |
| int_node=routers[i], |
| latency=link_latency, |
| ) |
| for (i, n) in enumerate(self.nodes) |
| ] |
| network.ext_links = ext_links |
| |
| link_count = len(self.nodes) |
| |
| int_links = [] |
| for i in range(len(self.nodes)): |
| int_links.append( |
| IntLink( |
| link_id=(link_count + i), |
| src_node=routers[i], |
| dst_node=xbar, |
| latency=link_latency, |
| ) |
| ) |
| |
| link_count += len(self.nodes) |
| |
| for i in range(len(self.nodes)): |
| int_links.append( |
| IntLink( |
| link_id=(link_count + i), |
| src_node=xbar, |
| dst_node=routers[i], |
| latency=link_latency, |
| ) |
| ) |
| |
| network.int_links = int_links |