| # Copyright (c) 2012, 2017-2018, 2021 ARM Limited |
| # All rights reserved. |
| # |
| # The license below extends only to copyright in the software and shall |
| # not be construed as granting a license to any other intellectual |
| # property including but not limited to intellectual property relating |
| # to a hardware implementation of the functionality of the software |
| # licensed hereunder. You may use the software subject to the license |
| # terms below provided that you ensure that this notice is replicated |
| # unmodified and in its entirety in all distributions of the software, |
| # modified or unmodified, in source code or in binary form. |
| # |
| # Copyright (c) 2006-2007 The Regents of The University of Michigan |
| # Copyright (c) 2009 Advanced Micro Devices, Inc. |
| # 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. |
| |
| import math |
| import m5 |
| from m5.objects import * |
| from m5.defines import buildEnv |
| from m5.util import addToPath, fatal |
| from gem5.isas import ISA |
| from gem5.runtime import get_runtime_isa |
| |
| addToPath('../') |
| |
| from common import ObjectList |
| from common import MemConfig |
| from common import FileSystemConfig |
| |
| from topologies import * |
| from network import Network |
| |
| def define_options(parser): |
| # By default, ruby uses the simple timing cpu |
| parser.set_defaults(cpu_type="TimingSimpleCPU") |
| |
| parser.add_argument( |
| "--ruby-clock", action="store", type=str, |
| default='2GHz', |
| help="Clock for blocks running at Ruby system's speed") |
| |
| parser.add_argument( |
| "--access-backing-store", action="store_true", default=False, |
| help="Should ruby maintain a second copy of memory") |
| |
| # Options related to cache structure |
| parser.add_argument( |
| "--ports", action="store", type=int, default=4, |
| help="used of transitions per cycle which is a proxy \ |
| for the number of ports.") |
| |
| # network options are in network/Network.py |
| |
| # ruby mapping options |
| parser.add_argument( |
| "--numa-high-bit", type=int, default=0, |
| help="high order address bit to use for numa mapping. " |
| "0 = highest bit, not specified = lowest bit") |
| parser.add_argument( |
| "--interleaving-bits", type=int, default=0, |
| help="number of bits to specify interleaving " \ |
| "in directory, memory controllers and caches. " |
| "0 = not specified") |
| parser.add_argument( |
| "--xor-low-bit", type=int, default=20, |
| help="hashing bit for channel selection" \ |
| "see MemConfig for explanation of the default"\ |
| "parameter. If set to 0, xor_high_bit is also"\ |
| "set to 0.") |
| |
| parser.add_argument( |
| "--recycle-latency", type=int, default=10, |
| help="Recycle latency for ruby controller input buffers") |
| |
| protocol = buildEnv['PROTOCOL'] |
| exec("from . import %s" % protocol) |
| eval("%s.define_options(parser)" % protocol) |
| Network.define_options(parser) |
| |
| def setup_memory_controllers(system, ruby, dir_cntrls, options): |
| if (options.numa_high_bit): |
| block_size_bits = options.numa_high_bit + 1 - \ |
| int(math.log(options.num_dirs, 2)) |
| ruby.block_size_bytes = 2 ** (block_size_bits) |
| else: |
| ruby.block_size_bytes = options.cacheline_size |
| |
| ruby.memory_size_bits = 48 |
| |
| index = 0 |
| mem_ctrls = [] |
| crossbars = [] |
| |
| if options.numa_high_bit: |
| dir_bits = int(math.log(options.num_dirs, 2)) |
| intlv_size = 2 ** (options.numa_high_bit - dir_bits + 1) |
| else: |
| # if the numa_bit is not specified, set the directory bits as the |
| # lowest bits above the block offset bits |
| intlv_size = options.cacheline_size |
| |
| # Sets bits to be used for interleaving. Creates memory controllers |
| # attached to a directory controller. A separate controller is created |
| # for each address range as the abstract memory can handle only one |
| # contiguous address range as of now. |
| for dir_cntrl in dir_cntrls: |
| crossbar = None |
| if len(system.mem_ranges) > 1: |
| crossbar = IOXBar() |
| crossbars.append(crossbar) |
| dir_cntrl.memory_out_port = crossbar.cpu_side_ports |
| |
| dir_ranges = [] |
| for r in system.mem_ranges: |
| mem_type = ObjectList.mem_list.get(options.mem_type) |
| dram_intf = MemConfig.create_mem_intf(mem_type, r, index, |
| int(math.log(options.num_dirs, 2)), |
| intlv_size, options.xor_low_bit) |
| if issubclass(mem_type, DRAMInterface): |
| mem_ctrl = m5.objects.MemCtrl(dram = dram_intf) |
| else: |
| mem_ctrl = dram_intf |
| |
| if options.access_backing_store: |
| dram_intf.kvm_map=False |
| |
| mem_ctrls.append(mem_ctrl) |
| dir_ranges.append(dram_intf.range) |
| |
| if crossbar != None: |
| mem_ctrl.port = crossbar.mem_side_ports |
| else: |
| mem_ctrl.port = dir_cntrl.memory_out_port |
| |
| # Enable low-power DRAM states if option is set |
| if issubclass(mem_type, DRAMInterface): |
| mem_ctrl.dram.enable_dram_powerdown = \ |
| options.enable_dram_powerdown |
| |
| index += 1 |
| dir_cntrl.addr_ranges = dir_ranges |
| |
| system.mem_ctrls = mem_ctrls |
| |
| if len(crossbars) > 0: |
| ruby.crossbars = crossbars |
| |
| |
| def create_topology(controllers, options): |
| """ Called from create_system in configs/ruby/<protocol>.py |
| Must return an object which is a subclass of BaseTopology |
| found in configs/topologies/BaseTopology.py |
| This is a wrapper for the legacy topologies. |
| """ |
| exec("import topologies.%s as Topo" % options.topology) |
| topology = eval("Topo.%s(controllers)" % options.topology) |
| return topology |
| |
| def create_system(options, full_system, system, piobus = None, dma_ports = [], |
| bootmem=None, cpus=None): |
| |
| system.ruby = RubySystem() |
| ruby = system.ruby |
| |
| # Generate pseudo filesystem |
| FileSystemConfig.config_filesystem(system, options) |
| |
| # Create the network object |
| (network, IntLinkClass, ExtLinkClass, RouterClass, InterfaceClass) = \ |
| Network.create_network(options, ruby) |
| ruby.network = network |
| |
| if cpus is None: |
| cpus = system.cpu |
| |
| protocol = buildEnv['PROTOCOL'] |
| exec("from . import %s" % protocol) |
| try: |
| (cpu_sequencers, dir_cntrls, topology) = \ |
| eval("%s.create_system(options, full_system, system, dma_ports,\ |
| bootmem, ruby, cpus)" |
| % protocol) |
| except: |
| print("Error: could not create sytem for ruby protocol %s" % protocol) |
| raise |
| |
| # Create the network topology |
| topology.makeTopology(options, network, IntLinkClass, ExtLinkClass, |
| RouterClass) |
| |
| # Register the topology elements with faux filesystem (SE mode only) |
| if not full_system: |
| topology.registerTopology(options) |
| |
| |
| # Initialize network based on topology |
| Network.init_network(options, network, InterfaceClass) |
| |
| # Create a port proxy for connecting the system port. This is |
| # independent of the protocol and kept in the protocol-agnostic |
| # part (i.e. here). |
| sys_port_proxy = RubyPortProxy(ruby_system = ruby) |
| if piobus is not None: |
| sys_port_proxy.pio_request_port = piobus.cpu_side_ports |
| |
| # Give the system port proxy a SimObject parent without creating a |
| # full-fledged controller |
| system.sys_port_proxy = sys_port_proxy |
| |
| # Connect the system port for loading of binaries etc |
| system.system_port = system.sys_port_proxy.in_ports |
| |
| setup_memory_controllers(system, ruby, dir_cntrls, options) |
| |
| # Connect the cpu sequencers and the piobus |
| if piobus != None: |
| for cpu_seq in cpu_sequencers: |
| cpu_seq.connectIOPorts(piobus) |
| |
| ruby.number_of_virtual_networks = ruby.network.number_of_virtual_networks |
| ruby._cpu_ports = cpu_sequencers |
| ruby.num_of_sequencers = len(cpu_sequencers) |
| |
| # Create a backing copy of physical memory in case required |
| if options.access_backing_store: |
| ruby.access_backing_store = True |
| ruby.phys_mem = SimpleMemory(range=system.mem_ranges[0], |
| in_addr_map=False) |
| |
| def create_directories(options, bootmem, ruby_system, system): |
| dir_cntrl_nodes = [] |
| for i in range(options.num_dirs): |
| dir_cntrl = Directory_Controller() |
| dir_cntrl.version = i |
| dir_cntrl.directory = RubyDirectoryMemory() |
| dir_cntrl.ruby_system = ruby_system |
| |
| exec("ruby_system.dir_cntrl%d = dir_cntrl" % i) |
| dir_cntrl_nodes.append(dir_cntrl) |
| |
| if bootmem is not None: |
| rom_dir_cntrl = Directory_Controller() |
| rom_dir_cntrl.directory = RubyDirectoryMemory() |
| rom_dir_cntrl.ruby_system = ruby_system |
| rom_dir_cntrl.version = i + 1 |
| rom_dir_cntrl.memory = bootmem.port |
| rom_dir_cntrl.addr_ranges = bootmem.range |
| return (dir_cntrl_nodes, rom_dir_cntrl) |
| |
| return (dir_cntrl_nodes, None) |
| |
| def send_evicts(options): |
| # currently, 2 scenarios warrant forwarding evictions to the CPU: |
| # 1. The O3 model must keep the LSQ coherent with the caches |
| # 2. The x86 mwait instruction is built on top of coherence invalidations |
| # 3. The local exclusive monitor in ARM systems |
| if options.cpu_type == "DerivO3CPU" or \ |
| get_runtime_isa() in (ISA.X86, ISA.ARM): |
| return True |
| return False |
