| # Copyright (c) 2016-2017, 2019 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. |
| # |
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| # 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; |
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| # neither the name of the copyright holders nor the names of its |
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| # 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 |
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| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| # Authors: Gabor Dozsa |
| # Andreas Sandberg |
| |
| # This is an example configuration script for full system simulation of |
| # a generic ARM bigLITTLE system. |
| |
| |
| from __future__ import print_function |
| from __future__ import absolute_import |
| |
| import argparse |
| import os |
| import sys |
| import m5 |
| import m5.util |
| from m5.objects import * |
| |
| m5.util.addToPath("../../") |
| |
| from common import FSConfig |
| from common import SysPaths |
| from common import ObjectList |
| from common import Options |
| from common.cores.arm import ex5_big, ex5_LITTLE |
| |
| import devices |
| from devices import AtomicCluster, KvmCluster, FastmodelCluster |
| |
| |
| default_disk = 'aarch64-ubuntu-trusty-headless.img' |
| default_rcs = 'bootscript.rcS' |
| |
| default_mem_size= "2GB" |
| |
| def _to_ticks(value): |
| """Helper function to convert a latency from string format to Ticks""" |
| |
| return m5.ticks.fromSeconds(m5.util.convert.anyToLatency(value)) |
| |
| def _using_pdes(root): |
| """Determine if the simulator is using multiple parallel event queues""" |
| |
| for obj in root.descendants(): |
| if not m5.proxy.isproxy(obj.eventq_index) and \ |
| obj.eventq_index != root.eventq_index: |
| return True |
| |
| return False |
| |
| |
| class BigCluster(devices.CpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, |
| cpu_voltage="1.0V"): |
| cpu_config = [ ObjectList.cpu_list.get("O3_ARM_v7a_3"), |
| devices.L1I, devices.L1D, devices.WalkCache, devices.L2 ] |
| super(BigCluster, self).__init__(system, num_cpus, cpu_clock, |
| cpu_voltage, *cpu_config) |
| |
| class LittleCluster(devices.CpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, |
| cpu_voltage="1.0V"): |
| cpu_config = [ ObjectList.cpu_list.get("MinorCPU"), devices.L1I, |
| devices.L1D, devices.WalkCache, devices.L2 ] |
| super(LittleCluster, self).__init__(system, num_cpus, cpu_clock, |
| cpu_voltage, *cpu_config) |
| |
| class Ex5BigCluster(devices.CpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, |
| cpu_voltage="1.0V"): |
| cpu_config = [ ObjectList.cpu_list.get("ex5_big"), ex5_big.L1I, |
| ex5_big.L1D, ex5_big.WalkCache, ex5_big.L2 ] |
| super(Ex5BigCluster, self).__init__(system, num_cpus, cpu_clock, |
| cpu_voltage, *cpu_config) |
| |
| class Ex5LittleCluster(devices.CpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, |
| cpu_voltage="1.0V"): |
| cpu_config = [ ObjectList.cpu_list.get("ex5_LITTLE"), |
| ex5_LITTLE.L1I, ex5_LITTLE.L1D, ex5_LITTLE.WalkCache, |
| ex5_LITTLE.L2 ] |
| super(Ex5LittleCluster, self).__init__(system, num_cpus, cpu_clock, |
| cpu_voltage, *cpu_config) |
| |
| def createSystem(caches, kernel, bootscript, machine_type="VExpress_GEM5", |
| disks=[], mem_size=default_mem_size): |
| platform = ObjectList.platform_list.get(machine_type) |
| m5.util.inform("Simulated platform: %s", platform.__name__) |
| |
| sys = devices.simpleSystem(LinuxArmSystem, |
| caches, mem_size, platform(), |
| kernel=SysPaths.binary(kernel), |
| readfile=bootscript) |
| |
| sys.mem_ctrls = [ SimpleMemory(range=r, port=sys.membus.master) |
| for r in sys.mem_ranges ] |
| |
| sys.connect() |
| |
| # Attach disk images |
| if disks: |
| def cow_disk(image_file): |
| image = CowDiskImage() |
| image.child.image_file = SysPaths.disk(image_file) |
| return image |
| |
| sys.disk_images = [ cow_disk(f) for f in disks ] |
| sys.pci_vio_block = [ PciVirtIO(vio=VirtIOBlock(image=img)) |
| for img in sys.disk_images ] |
| for dev in sys.pci_vio_block: |
| sys.attach_pci(dev) |
| |
| sys.realview.setupBootLoader(sys, SysPaths.binary) |
| |
| return sys |
| |
| cpu_types = { |
| "atomic" : (AtomicCluster, AtomicCluster), |
| "timing" : (BigCluster, LittleCluster), |
| "exynos" : (Ex5BigCluster, Ex5LittleCluster), |
| } |
| |
| # Only add the KVM CPU if it has been compiled into gem5 |
| if devices.have_kvm: |
| cpu_types["kvm"] = (KvmCluster, KvmCluster) |
| |
| # Only add the FastModel CPU if it has been compiled into gem5 |
| if devices.have_fastmodel: |
| cpu_types["fastmodel"] = (FastmodelCluster, FastmodelCluster) |
| |
| def addOptions(parser): |
| parser.add_argument("--restore-from", type=str, default=None, |
| help="Restore from checkpoint") |
| parser.add_argument("--dtb", type=str, default=None, |
| help="DTB file to load") |
| parser.add_argument("--kernel", type=str, required=True, |
| help="Linux kernel") |
| parser.add_argument("--root", type=str, default="/dev/vda1", |
| help="Specify the kernel CLI root= argument") |
| parser.add_argument("--machine-type", type=str, |
| choices=ObjectList.platform_list.get_names(), |
| default="VExpress_GEM5", |
| help="Hardware platform class") |
| parser.add_argument("--disk", action="append", type=str, default=[], |
| help="Disks to instantiate") |
| parser.add_argument("--bootscript", type=str, default=default_rcs, |
| help="Linux bootscript") |
| parser.add_argument("--cpu-type", type=str, choices=cpu_types.keys(), |
| default="timing", |
| help="CPU simulation mode. Default: %(default)s") |
| parser.add_argument("--kernel-init", type=str, default="/sbin/init", |
| help="Override init") |
| parser.add_argument("--big-cpus", type=int, default=1, |
| help="Number of big CPUs to instantiate") |
| parser.add_argument("--little-cpus", type=int, default=1, |
| help="Number of little CPUs to instantiate") |
| parser.add_argument("--caches", action="store_true", default=False, |
| help="Instantiate caches") |
| parser.add_argument("--last-cache-level", type=int, default=2, |
| help="Last level of caches (e.g. 3 for L3)") |
| parser.add_argument("--big-cpu-clock", type=str, default="2GHz", |
| help="Big CPU clock frequency") |
| parser.add_argument("--little-cpu-clock", type=str, default="1GHz", |
| help="Little CPU clock frequency") |
| parser.add_argument("--sim-quantum", type=str, default="1ms", |
| help="Simulation quantum for parallel simulation. " \ |
| "Default: %(default)s") |
| parser.add_argument("--mem-size", type=str, default=default_mem_size, |
| help="System memory size") |
| parser.add_argument("--kernel-cmd", type=str, default=None, |
| help="Custom Linux kernel command") |
| parser.add_argument("-P", "--param", action="append", default=[], |
| help="Set a SimObject parameter relative to the root node. " |
| "An extended Python multi range slicing syntax can be used " |
| "for arrays. For example: " |
| "'system.cpu[0,1,3:8:2].max_insts_all_threads = 42' " |
| "sets max_insts_all_threads for cpus 0, 1, 3, 5 and 7 " |
| "Direct parameters of the root object are not accessible, " |
| "only parameters of its children.") |
| parser.add_argument("--vio-9p", action="store_true", |
| help=Options.vio_9p_help) |
| return parser |
| |
| def build(options): |
| m5.ticks.fixGlobalFrequency() |
| |
| kernel_cmd = [ |
| "earlyprintk=pl011,0x1c090000", |
| "console=ttyAMA0", |
| "lpj=19988480", |
| "norandmaps", |
| "loglevel=8", |
| "mem=%s" % options.mem_size, |
| "root=%s" % options.root, |
| "rw", |
| "init=%s" % options.kernel_init, |
| "vmalloc=768MB", |
| ] |
| |
| root = Root(full_system=True) |
| |
| disks = [default_disk] if len(options.disk) == 0 else options.disk |
| system = createSystem(options.caches, |
| options.kernel, |
| options.bootscript, |
| options.machine_type, |
| disks=disks, |
| mem_size=options.mem_size) |
| |
| root.system = system |
| if options.kernel_cmd: |
| system.boot_osflags = options.kernel_cmd |
| else: |
| system.boot_osflags = " ".join(kernel_cmd) |
| |
| if options.big_cpus + options.little_cpus == 0: |
| m5.util.panic("Empty CPU clusters") |
| |
| big_model, little_model = cpu_types[options.cpu_type] |
| |
| all_cpus = [] |
| # big cluster |
| if options.big_cpus > 0: |
| system.bigCluster = big_model(system, options.big_cpus, |
| options.big_cpu_clock) |
| system.mem_mode = system.bigCluster.memoryMode() |
| all_cpus += system.bigCluster.cpus |
| |
| # little cluster |
| if options.little_cpus > 0: |
| system.littleCluster = little_model(system, options.little_cpus, |
| options.little_cpu_clock) |
| system.mem_mode = system.littleCluster.memoryMode() |
| all_cpus += system.littleCluster.cpus |
| |
| # Figure out the memory mode |
| if options.big_cpus > 0 and options.little_cpus > 0 and \ |
| system.bigCluster.memoryMode() != system.littleCluster.memoryMode(): |
| m5.util.panic("Memory mode missmatch among CPU clusters") |
| |
| |
| # create caches |
| system.addCaches(options.caches, options.last_cache_level) |
| if not options.caches: |
| if options.big_cpus > 0 and system.bigCluster.requireCaches(): |
| m5.util.panic("Big CPU model requires caches") |
| if options.little_cpus > 0 and system.littleCluster.requireCaches(): |
| m5.util.panic("Little CPU model requires caches") |
| |
| # Create a KVM VM and do KVM-specific configuration |
| if issubclass(big_model, KvmCluster): |
| _build_kvm(system, all_cpus) |
| |
| # Linux device tree |
| if options.dtb is not None: |
| system.dtb_filename = SysPaths.binary(options.dtb) |
| else: |
| system.generateDtb(m5.options.outdir, 'system.dtb') |
| |
| if devices.have_fastmodel and issubclass(big_model, FastmodelCluster): |
| from m5 import arm_fast_model as fm, systemc as sc |
| # setup FastModels for simulation |
| fm.setup_simulation("cortexa76") |
| # setup SystemC |
| root.systemc_kernel = m5.objects.SystemC_Kernel() |
| m5.tlm.tlm_global_quantum_instance().set( |
| sc.sc_time(10000.0 / 100000000.0, sc.sc_time.SC_SEC)) |
| |
| if options.vio_9p: |
| FSConfig.attach_9p(system.realview, system.iobus) |
| |
| return root |
| |
| def _build_kvm(system, cpus): |
| system.kvm_vm = KvmVM() |
| |
| # Assign KVM CPUs to their own event queues / threads. This |
| # has to be done after creating caches and other child objects |
| # since these mustn't inherit the CPU event queue. |
| if len(cpus) > 1: |
| device_eq = 0 |
| first_cpu_eq = 1 |
| for idx, cpu in enumerate(cpus): |
| # Child objects usually inherit the parent's event |
| # queue. Override that and use the same event queue for |
| # all devices. |
| for obj in cpu.descendants(): |
| obj.eventq_index = device_eq |
| cpu.eventq_index = first_cpu_eq + idx |
| |
| |
| |
| def instantiate(options, checkpoint_dir=None): |
| # Setup the simulation quantum if we are running in PDES-mode |
| # (e.g., when using KVM) |
| root = Root.getInstance() |
| if root and _using_pdes(root): |
| m5.util.inform("Running in PDES mode with a %s simulation quantum.", |
| options.sim_quantum) |
| root.sim_quantum = _to_ticks(options.sim_quantum) |
| |
| # Get and load from the chkpt or simpoint checkpoint |
| if options.restore_from: |
| if checkpoint_dir and not os.path.isabs(options.restore_from): |
| cpt = os.path.join(checkpoint_dir, options.restore_from) |
| else: |
| cpt = options.restore_from |
| |
| m5.util.inform("Restoring from checkpoint %s", cpt) |
| m5.instantiate(cpt) |
| else: |
| m5.instantiate() |
| |
| |
| def run(checkpoint_dir=m5.options.outdir): |
| # start simulation (and drop checkpoints when requested) |
| while True: |
| event = m5.simulate() |
| exit_msg = event.getCause() |
| if exit_msg == "checkpoint": |
| print("Dropping checkpoint at tick %d" % m5.curTick()) |
| cpt_dir = os.path.join(checkpoint_dir, "cpt.%d" % m5.curTick()) |
| m5.checkpoint(cpt_dir) |
| print("Checkpoint done.") |
| else: |
| print(exit_msg, " @ ", m5.curTick()) |
| break |
| |
| sys.exit(event.getCode()) |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser( |
| description="Generic ARM big.LITTLE configuration") |
| addOptions(parser) |
| options = parser.parse_args() |
| root = build(options) |
| root.apply_config(options.param) |
| instantiate(options) |
| run() |
| |
| |
| if __name__ == "__m5_main__": |
| main() |
