BaseTopology.py revision 9148 
1# Copyright (c) 2012 Advanced Micro Devices, Inc.
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27# Authors: Jason Power
28
29import m5
30
31class BaseTopology(object):
32    description = "BaseTopology"
33
34    def __init__(self):
35        """ When overriding place any objects created in
36            configs/ruby/<protocol>.py that are needed in
37            makeTopology (below) here. The minimum is usually
38            all of the controllers created in the above file.
39        """
40
41    def makeTopology(self, options, IntLink, ExtLink, Router):
42        """ Called from configs/ruby/Ruby.py
43            The return value is ( list(Router), list(IntLink), list(ExtLink))
44            The API of this function cannot change when subclassing!!
45            Any additional information needed to create this topology should
46            be passed into the constructor when it's instantiated in
47            configs/ruby/<protocol>.py
48        """
49        m5.util.fatal("BaseTopology should have been overridden!!")
50
51class SimpleTopology(BaseTopology):
52    """ Provides methods needed for the topologies included in Ruby before
53        topology changes.
54        These topologies are "simple" in the sense that they only use a flat
55        list of controllers to construct the topology.
56    """
57    description = "SimpleTopology"
58
59    def __init__(self, controllers):
60        self.nodes = controllers
61
62    def addController(self, controller):
63        self.nodes.append(controller)
64
65    def __len__(self):
66        return len(self.nodes)
67