components_library/cachehierarchies/ruby/topologies/simple_pt2pt.py

# Copyright (c) 2021 The Regents of the University of California.
# All Rights Reserved
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

from m5.objects import SimpleNetwork, Switch, SimpleExtLink, SimpleIntLink


class SimplePt2Pt(SimpleNetwork):
    """A simple point-to-point network. This doesn't not use garnet."""

    def __init__(self, ruby_system):
        super(SimplePt2Pt, self).__init__()
        self.netifs = []

        # TODO: These should be in a base class
        # https://gem5.atlassian.net/browse/GEM5-1039
        self.ruby_system = ruby_system

    def connectControllers(self, controllers):
        """Connect all of the controllers to routers and connec the routers
        together in a point-to-point network.
        """
        # Create one router/switch per controller in the system
        self.routers = [Switch(router_id=i) for i in range(len(controllers))]

        # Make a link from each controller to the router. The link goes
        # externally to the network.
        self.ext_links = [
            SimpleExtLink(link_id=i, ext_node=c, int_node=self.routers[i])
            for i, c in enumerate(controllers)
        ]

        # Make an "internal" link (internal to the network) between every pair
        # of routers.
        link_count = 0
        int_links = []
        for ri in self.routers:
            for rj in self.routers:
                if ri == rj:
                    continue  # Don't connect a router to itself!
                link_count += 1
                int_links.append(
                    SimpleIntLink(link_id=link_count, src_node=ri, dst_node=rj)
                )
        self.int_links = int_links