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# -*- coding: utf-8 -*-
# Copyright (c) 2017 Jason Power
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
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# 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
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# this software without specific prior written permission.
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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""" This file creates a set of Ruby caches, the Ruby network, and a simple
point-to-point topology for the RubyRandomTester to use.
See Part 3 in the Learning gem5 book:
http://gem5.org/documentation/learning_gem5/part3/MSIintro
IMPORTANT: If you modify this file, it's likely that the Learning gem5 book
also needs to be updated. For now, email Jason <jason@lowepower.com>
"""
from m5.defines import buildEnv
from m5.util import fatal
from m5.objects import *
from msi_caches import L1Cache, DirController, MyNetwork
class TestCacheSystem(RubySystem):
def __init__(self):
if buildEnv['PROTOCOL'] != 'MSI':
fatal("This system assumes MSI from learning gem5!")
super(TestCacheSystem, self).__init__()
def setup(self, system, tester, mem_ctrls):
"""Set up the Ruby cache subsystem. Note: This can't be done in the
constructor because many of these items require a pointer to the
ruby system (self). This causes infinite recursion in initialize()
if we do this in the __init__.
Setting up for running the RubyRandomTester is a little different
than when we're using CPUs.
"""
num_testers = tester.num_cpus
# Ruby's global network.
self.network = MyNetwork(self)
# MSI uses 3 virtual networks
self.number_of_virtual_networks = 3
self.network.number_of_virtual_networks = 3
self.controllers = \
[L1Cache(system, self, self) for i in range(num_testers)] + \
[DirController(self, system.mem_ranges, mem_ctrls)]
self.sequencers = [RubySequencer(version = i,
# I/D cache is combined and grab from ctrl
dcache = self.controllers[i].cacheMemory,
clk_domain = self.clk_domain,
) for i in range(num_testers)]
for i,c in enumerate(self.controllers[0:len(self.sequencers)]):
c.sequencer = self.sequencers[i]
self.num_of_sequencers = len(self.sequencers)
# Create the network and connect the controllers.
# NOTE: This is quite different if using Garnet!
self.network.connectControllers(self.controllers)
self.network.setup_buffers()
# Set up a proxy port for the system_port. Used for load binaries and
# other functional-only things.
self.sys_port_proxy = RubyPortProxy()
system.system_port = self.sys_port_proxy.slave
# Connect up the sequencers to the random tester
for seq in self.sequencers:
if seq.support_data_reqs and seq.support_inst_reqs:
tester.cpuInstDataPort = seq.slave
elif seq.support_data_reqs:
tester.cpuDataPort = seq.slave
elif seq.support_inst_reqs:
tester.cpuInstDataPort = seq.slave
# Do not automatically retry stalled Ruby requests
seq.no_retry_on_stall = True
# Tell each sequencer this is the ruby tester so that it
# copies the subblock back to the checker
seq.using_ruby_tester = True