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# Copyright (c) 2016 Georgia Institute of Technology
# 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.
#
# Authors: Tushar Krishna
from __future__ import print_function
from __future__ import absolute_import
import math
import m5
from m5.objects import *
from m5.defines import buildEnv
from m5.util import addToPath, fatal
def define_options(parser):
# By default, ruby uses the simple timing cpu
parser.set_defaults(cpu_type="TimingSimpleCPU")
parser.add_option("--topology", type="string", default="Crossbar",
help="check configs/topologies for complete set")
parser.add_option("--mesh-rows", type="int", default=0,
help="the number of rows in the mesh topology")
parser.add_option("--network", type="choice", default="simple",
choices=['simple', 'garnet2.0'],
help="'simple'|'garnet2.0'")
parser.add_option("--router-latency", action="store", type="int",
default=1,
help="""number of pipeline stages in the garnet router.
Has to be >= 1.
Can be over-ridden on a per router basis
in the topology file.""")
parser.add_option("--link-latency", action="store", type="int", default=1,
help="""latency of each link the simple/garnet networks.
Has to be >= 1.
Can be over-ridden on a per link basis
in the topology file.""")
parser.add_option("--link-width-bits", action="store", type="int",
default=128,
help="width in bits for all links inside garnet.")
parser.add_option("--vcs-per-vnet", action="store", type="int", default=4,
help="""number of virtual channels per virtual network
inside garnet network.""")
parser.add_option("--routing-algorithm", action="store", type="int",
default=0,
help="""routing algorithm in network.
0: weight-based table
1: XY (for Mesh. see garnet2.0/RoutingUnit.cc)
2: Custom (see garnet2.0/RoutingUnit.cc""")
parser.add_option("--network-fault-model", action="store_true",
default=False,
help="""enable network fault model:
see src/mem/ruby/network/fault_model/""")
parser.add_option("--garnet-deadlock-threshold", action="store",
type="int", default=50000,
help="network-level deadlock threshold.")
def create_network(options, ruby):
# Set the network classes based on the command line options
if options.network == "garnet2.0":
NetworkClass = GarnetNetwork
IntLinkClass = GarnetIntLink
ExtLinkClass = GarnetExtLink
RouterClass = GarnetRouter
InterfaceClass = GarnetNetworkInterface
else:
NetworkClass = SimpleNetwork
IntLinkClass = SimpleIntLink
ExtLinkClass = SimpleExtLink
RouterClass = Switch
InterfaceClass = None
# Instantiate the network object
# so that the controllers can connect to it.
network = NetworkClass(ruby_system = ruby, topology = options.topology,
routers = [], ext_links = [], int_links = [], netifs = [])
return (network, IntLinkClass, ExtLinkClass, RouterClass, InterfaceClass)
def init_network(options, network, InterfaceClass):
if options.network == "garnet2.0":
network.num_rows = options.mesh_rows
network.vcs_per_vnet = options.vcs_per_vnet
network.ni_flit_size = options.link_width_bits / 8
network.routing_algorithm = options.routing_algorithm
network.garnet_deadlock_threshold = options.garnet_deadlock_threshold
if options.network == "simple":
network.setup_buffers()
if InterfaceClass != None:
netifs = [InterfaceClass(id=i) \
for (i,n) in enumerate(network.ext_links)]
network.netifs = netifs
if options.network_fault_model:
assert(options.network == "garnet2.0")
network.enable_fault_model = True
network.fault_model = FaultModel()
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