1# Copyright (c) 2012 Advanced Micro Devices, Inc.
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
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13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Jason Power
28
29from __future__ import print_function
30from __future__ import absolute_import
31
32import m5
33
34class BaseTopology(object):
35    description = "BaseTopology"
36
37    def __init__(self):
38        """ When overriding place any objects created in
39            configs/ruby/<protocol>.py that are needed in
40            makeTopology (below) here. The minimum is usually
41            all of the controllers created in the above file.
42        """
43
44    def makeTopology(self, options, network, IntLink, ExtLink, Router):
45        """ Called from configs/ruby/Ruby.py
46            The return value is ( list(Router), list(IntLink), list(ExtLink))
47            The API of this function cannot change when subclassing!!
48            Any additional information needed to create this topology should
49            be passed into the constructor when it's instantiated in
50            configs/ruby/<protocol>.py
51        """
52        m5.util.fatal("BaseTopology should have been overridden!!")
53
54    def registerTopology(self, options):
55        """ Called from configs/ruby/Ruby.py
56            There is no return value. This should only be called in
57            SE mode. It is used by some topology objects to populate
58            the faux filesystem with accurate file contents.
59            No need to implement if not using FilesystemRegister
60            functionality.
61        """
62
63class SimpleTopology(BaseTopology):
64    """ Provides methods needed for the topologies included in Ruby before
65        topology changes.
66        These topologies are "simple" in the sense that they only use a flat
67        list of controllers to construct the topology.
68    """
69    description = "SimpleTopology"
70
71    def __init__(self, controllers):
72        self.nodes = controllers
73
74    def addController(self, controller):
75        self.nodes.append(controller)
76
77    def __len__(self):
78        return len(self.nodes)
79