configs/topologies/Crossbar.py

   1 # Copyright (c) 2010 Advanced Micro Devices, Inc.
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  11 # neither the name of the copyright holders nor the names of its
  12 # contributors may be used to endorse or promote products derived from
  13 # this software without specific prior written permission.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  26 #
  27 # Authors: Steve Reinhardt
  28
  29 from m5.params import *
  30 from m5.objects import *
  31
  32 from BaseTopology import SimpleTopology
  33
  34 class Crossbar(SimpleTopology):
  35     description='Crossbar'
  36
  37     def makeTopology(self, options, network, IntLink, ExtLink, Router):
  38         # Create an individual router for each controller plus one more for
  39         # the centralized crossbar.  The large numbers of routers are needed
  40         # because external links do not model outgoing bandwidth in the
  41         # simple network, but internal links do.
  42
  43         routers = [Router(router_id=i) for i in range(len(self.nodes)+1)]
  44         xbar = routers[len(self.nodes)] # the crossbar router is the last router created
  45         network.routers = routers
  46
  47         ext_links = [ExtLink(link_id=i, ext_node=n, int_node=routers[i])
  48                         for (i, n) in enumerate(self.nodes)]
  49         network.ext_links = ext_links
  50
  51         link_count = len(self.nodes)
  52         int_links = [IntLink(link_id=(link_count+i),
  53                              node_a=routers[i], node_b=xbar)
  54                         for i in range(len(self.nodes))]
  55         network.int_links = int_links