7d7ab73862
This patch adds the notion of source- and derived-clock domains to the ClockedObjects. As such, all clock information is moved to the clock domain, and the ClockedObjects are grouped into domains. The clock domains are either source domains, with a specific clock period, or derived domains that have a parent domain and a divider (potentially chained). For piece of logic that runs at a derived clock (a ratio of the clock its parent is running at) the necessary derived clock domain is created from its corresponding parent clock domain. For now, the derived clock domain only supports a divider, thus ensuring a lower speed compared to its parent. Multiplier functionality implies a PLL logic that has not been modelled yet (create a separate clock instead). The clock domains should be used as a mechanism to provide a controllable clock source that affects clock for every clocked object lying beneath it. The clock of the domain can (in a future patch) be controlled by a handler responsible for dynamic frequency scaling of the respective clock domains. All the config scripts have been retro-fitted with clock domains. For the System a default SrcClockDomain is created. For CPUs that run at a different speed than the system, there is a seperate clock domain created. This domain incorporates the CPU and the associated caches. As before, Ruby runs under its own clock domain. The clock period of all domains are pre-computed, such that no virtual functions or multiplications are needed when calling clockPeriod. Instead, the clock period is pre-computed when any changes occur. For this to be possible, each clock domain tracks its children.
196 lines
8.4 KiB
Python
196 lines
8.4 KiB
Python
# Copyright (c) 2012 ARM Limited
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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#
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# Copyright (c) 2006-2007 The Regents of The University of Michigan
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# Copyright (c) 2009 Advanced Micro Devices, Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Brad Beckmann
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import math
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import m5
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from m5.objects import *
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from m5.defines import buildEnv
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def define_options(parser):
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# By default, ruby uses the simple timing cpu
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parser.set_defaults(cpu_type="timing")
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parser.add_option("--ruby-clock", action="store", type="string",
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default='2GHz',
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help="Clock for blocks running at Ruby system's speed")
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# ruby network options
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parser.add_option("--topology", type="string", default="Crossbar",
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help="check src/mem/ruby/network/topologies for complete set")
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parser.add_option("--mesh-rows", type="int", default=1,
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help="the number of rows in the mesh topology")
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parser.add_option("--garnet-network", type="choice",
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choices=['fixed', 'flexible'], help="'fixed'|'flexible'")
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parser.add_option("--network-fault-model", action="store_true", default=False,
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help="enable network fault model: see src/mem/ruby/network/fault_model/")
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# ruby mapping options
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parser.add_option("--numa-high-bit", type="int", default=0,
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help="high order address bit to use for numa mapping. " \
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"0 = highest bit, not specified = lowest bit")
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# ruby sparse memory options
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parser.add_option("--use-map", action="store_true", default=False)
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parser.add_option("--map-levels", type="int", default=4)
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parser.add_option("--recycle-latency", type="int", default=10,
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help="Recycle latency for ruby controller input buffers")
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parser.add_option("--random_seed", type="int", default=1234,
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help="Used for seeding the random number generator")
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parser.add_option("--ruby_stats", type="string", default="ruby.stats")
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protocol = buildEnv['PROTOCOL']
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exec "import %s" % protocol
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eval("%s.define_options(parser)" % protocol)
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def create_topology(controllers, options):
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""" Called from create_system in configs/ruby/<protocol>.py
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Must return an object which is a subclass of BaseTopology
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found in configs/topologies/BaseTopology.py
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This is a wrapper for the legacy topologies.
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"""
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exec "import %s as Topo" % options.topology
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topology = eval("Topo.%s(controllers)" % options.topology)
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return topology
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def create_system(options, system, piobus = None, dma_ports = []):
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system.ruby = RubySystem(stats_filename = options.ruby_stats,
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no_mem_vec = options.use_map)
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ruby = system.ruby
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protocol = buildEnv['PROTOCOL']
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exec "import %s" % protocol
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try:
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(cpu_sequencers, dir_cntrls, topology) = \
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eval("%s.create_system(options, system, piobus, dma_ports, ruby)"
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% protocol)
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except:
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print "Error: could not create sytem for ruby protocol %s" % protocol
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raise
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# Create a port proxy for connecting the system port. This is
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# independent of the protocol and kept in the protocol-agnostic
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# part (i.e. here).
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sys_port_proxy = RubyPortProxy(ruby_system = ruby)
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# Give the system port proxy a SimObject parent without creating a
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# full-fledged controller
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system.sys_port_proxy = sys_port_proxy
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# Connect the system port for loading of binaries etc
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system.system_port = system.sys_port_proxy.slave
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#
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# Set the network classes based on the command line options
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#
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if options.garnet_network == "fixed":
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class NetworkClass(GarnetNetwork_d): pass
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class IntLinkClass(GarnetIntLink_d): pass
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class ExtLinkClass(GarnetExtLink_d): pass
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class RouterClass(GarnetRouter_d): pass
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elif options.garnet_network == "flexible":
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class NetworkClass(GarnetNetwork): pass
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class IntLinkClass(GarnetIntLink): pass
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class ExtLinkClass(GarnetExtLink): pass
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class RouterClass(GarnetRouter): pass
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else:
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class NetworkClass(SimpleNetwork): pass
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class IntLinkClass(SimpleIntLink): pass
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class ExtLinkClass(SimpleExtLink): pass
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class RouterClass(Switch): pass
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#
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# Important: the topology must be instantiated before the network and after
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# the controllers. Hence the separation between topology definition and
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# instantiation.
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#
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routers, int_links, ext_links = topology.makeTopology(options,
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IntLinkClass, ExtLinkClass, RouterClass)
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network = NetworkClass(ruby_system = ruby, routers = routers,
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int_links = int_links, ext_links = ext_links,
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topology = topology.description)
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if options.network_fault_model:
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assert(options.garnet_network == "fixed")
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network.enable_fault_model = True
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network.fault_model = FaultModel()
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#
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# Loop through the directory controlers.
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# Determine the total memory size of the ruby system and verify it is equal
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# to physmem. However, if Ruby memory is using sparse memory in SE
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# mode, then the system should not back-up the memory state with
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# the Memory Vector and thus the memory size bytes should stay at 0.
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# Also set the numa bits to the appropriate values.
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#
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total_mem_size = MemorySize('0B')
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dir_bits = int(math.log(options.num_dirs, 2))
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ruby.block_size_bytes = options.cacheline_size
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block_size_bits = int(math.log(options.cacheline_size, 2))
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if options.numa_high_bit:
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numa_bit = options.numa_high_bit
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else:
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# if the numa_bit is not specified, set the directory bits as the
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# lowest bits above the block offset bits, and the numa_bit as the
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# highest of those directory bits
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numa_bit = block_size_bits + dir_bits - 1
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for dir_cntrl in dir_cntrls:
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total_mem_size.value += dir_cntrl.directory.size.value
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dir_cntrl.directory.numa_high_bit = numa_bit
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phys_mem_size = sum(map(lambda mem: mem.range.size(),
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system.memories.unproxy(system)))
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assert(total_mem_size.value == phys_mem_size)
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ruby_profiler = RubyProfiler(ruby_system = ruby,
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num_of_sequencers = len(cpu_sequencers))
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ruby.network = network
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ruby.profiler = ruby_profiler
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ruby.mem_size = total_mem_size
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ruby._cpu_ruby_ports = cpu_sequencers
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ruby.random_seed = options.random_seed
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