Crossbar.py revision 11666
17032SN/A# Copyright (c) 2010 Advanced Micro Devices, Inc. 27032SN/A# All rights reserved. 37032SN/A# 47032SN/A# Redistribution and use in source and binary forms, with or without 57032SN/A# modification, are permitted provided that the following conditions are 67032SN/A# met: redistributions of source code must retain the above copyright 77032SN/A# notice, this list of conditions and the following disclaimer; 87032SN/A# redistributions in binary form must reproduce the above copyright 97032SN/A# notice, this list of conditions and the following disclaimer in the 107032SN/A# documentation and/or other materials provided with the distribution; 117032SN/A# neither the name of the copyright holders nor the names of its 127032SN/A# contributors may be used to endorse or promote products derived from 137032SN/A# this software without specific prior written permission. 147032SN/A# 157032SN/A# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 167032SN/A# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 177032SN/A# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 187032SN/A# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 197032SN/A# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 207032SN/A# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 217032SN/A# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 227032SN/A# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 237032SN/A# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 247032SN/A# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 257032SN/A# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 267032SN/A# 277032SN/A# Authors: Steve Reinhardt 287032SN/A 297032SN/Afrom m5.params import * 307032SN/Afrom m5.objects import * 317032SN/A 329148Spowerjg@cs.wisc.edufrom BaseTopology import SimpleTopology 339100SBrad.Beckmann@amd.com 349148Spowerjg@cs.wisc.educlass Crossbar(SimpleTopology): 357540SN/A description='Crossbar' 367540SN/A 379862Snilay@cs.wisc.edu def makeTopology(self, options, network, IntLink, ExtLink, Router): 3811666Stushar@ece.gatech.edu 3911666Stushar@ece.gatech.edu # default values for link latency and router latency. 4011666Stushar@ece.gatech.edu # Can be over-ridden on a per link/router basis 4111666Stushar@ece.gatech.edu link_latency = options.link_latency # used by simple and garnet 4211666Stushar@ece.gatech.edu router_latency = options.router_latency # only used by garnet 4311666Stushar@ece.gatech.edu 449862Snilay@cs.wisc.edu # Create an individual router for each controller plus one more for 459862Snilay@cs.wisc.edu # the centralized crossbar. The large numbers of routers are needed 469862Snilay@cs.wisc.edu # because external links do not model outgoing bandwidth in the 479862Snilay@cs.wisc.edu # simple network, but internal links do. 4811663Stushar@ece.gatech.edu # For garnet, one router suffices, use CrossbarGarnet.py 497032SN/A 509100SBrad.Beckmann@amd.com routers = [Router(router_id=i) for i in range(len(self.nodes)+1)] 519862Snilay@cs.wisc.edu xbar = routers[len(self.nodes)] # the crossbar router is the last router created 529862Snilay@cs.wisc.edu network.routers = routers 539862Snilay@cs.wisc.edu 5411666Stushar@ece.gatech.edu ext_links = [ExtLink(link_id=i, ext_node=n, int_node=routers[i], 5511666Stushar@ece.gatech.edu latency = link_latency) 569100SBrad.Beckmann@amd.com for (i, n) in enumerate(self.nodes)] 579862Snilay@cs.wisc.edu network.ext_links = ext_links 589862Snilay@cs.wisc.edu 599100SBrad.Beckmann@amd.com link_count = len(self.nodes) 6011663Stushar@ece.gatech.edu 6111663Stushar@ece.gatech.edu int_links = [] 6211663Stushar@ece.gatech.edu for i in range(len(self.nodes)): 6311663Stushar@ece.gatech.edu int_links.append(IntLink(link_id=(link_count+i), 6411663Stushar@ece.gatech.edu src_node=routers[i], 6511666Stushar@ece.gatech.edu dst_node=xbar, 6611666Stushar@ece.gatech.edu latency = link_latency)) 6711663Stushar@ece.gatech.edu 6811663Stushar@ece.gatech.edu link_count += len(self.nodes) 6911663Stushar@ece.gatech.edu 7011663Stushar@ece.gatech.edu for i in range(len(self.nodes)): 7111663Stushar@ece.gatech.edu int_links.append(IntLink(link_id=(link_count+i), 7211663Stushar@ece.gatech.edu src_node=xbar, 7311666Stushar@ece.gatech.edu dst_node=routers[i], 7411666Stushar@ece.gatech.edu latency = link_latency)) 7511663Stushar@ece.gatech.edu 769862Snilay@cs.wisc.edu network.int_links = int_links 77