1# Copyright (c) 2011 Advanced Micro Devices, Inc.
2#               2011 Massachusetts Institute of Technology
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;
9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
11# documentation and/or other materials provided with the distribution;
12# neither the name of the copyright holders nor the names of its
13# contributors may be used to endorse or promote products derived from
14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27#
28# Authors: Brad Beckmann
29#          Tushar Krishna
30
31from __future__ import print_function
32from __future__ import absolute_import
33
34from m5.params import *
35from m5.objects import *
36
37from .BaseTopology import SimpleTopology
38
39class Pt2Pt(SimpleTopology):
40    description='Pt2Pt'
41
42    def __init__(self, controllers):
43        self.nodes = controllers
44
45    def makeTopology(self, options, network, IntLink, ExtLink, Router):
46        nodes = self.nodes
47
48        # default values for link latency and router latency.
49        # Can be over-ridden on a per link/router basis
50        link_latency = options.link_latency # used by simple and garnet
51        router_latency = options.router_latency # only used by garnet
52
53        # Create an individual router for each controller,
54        # and connect all to all.
55        # Since this is a high-radix router, router_latency should
56        # accordingly be set to a higher value than the default
57        # (which is 1 for mesh routers)
58        routers = [Router(router_id=i, latency = router_latency) \
59            for i in range(len(nodes))]
60        network.routers = routers
61
62        ext_links = [ExtLink(link_id=i, ext_node=n, int_node=routers[i],
63                     latency = link_latency)
64                    for (i, n) in enumerate(nodes)]
65        network.ext_links = ext_links
66
67        link_count = len(nodes)
68        int_links = []
69        for i in range(len(nodes)):
70            for j in range(len(nodes)):
71                if (i != j):
72                    link_count += 1
73                    int_links.append(IntLink(link_id=link_count,
74                                             src_node=routers[i],
75                                             dst_node=routers[j],
76                                             latency = link_latency))
77
78        network.int_links = int_links
79