diff options
Diffstat (limited to 'configs/learning_gem5/part3/test_caches.py')
| -rw-r--r-- | configs/learning_gem5/part3/test_caches.py | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/configs/learning_gem5/part3/test_caches.py b/configs/learning_gem5/part3/test_caches.py new file mode 100644 index 000000000..3721f4a6b --- /dev/null +++ b/configs/learning_gem5/part3/test_caches.py @@ -0,0 +1,111 @@ +# -*- coding: utf-8 -*- +# Copyright (c) 2017 Jason Power +# 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: Jason Power + +""" 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: learning.gem5.org/book/part3 + +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 + icache = self.controllers[i].cacheMemory, + 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 |