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# 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
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# modified or unmodified, in source code or in binary form.
#
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# 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
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# 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,
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# 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.
# 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, bootloader=None):
platform = ObjectList.platform_list.get(machine_type)
m5.util.inform("Simulated platform: %s", platform.__name__)
sys = devices.simpleSystem(ArmSystem,
caches, mem_size, platform(),
workload=ArmFsLinux(
object_file=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, bootloader)
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("--bootloader", action="append",
help="executable file that runs before the --kernel")
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,
bootloader=options.bootloader)
root.system = system
if options.kernel_cmd:
system.workload.command_line = options.kernel_cmd
else:
system.workload.command_line = " ".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.workload.dtb_filename = SysPaths.binary(options.dtb)
else:
system.workload.dtb_filename = \
os.path.join(m5.options.outdir, 'system.dtb')
system.generateDtb(system.workload.dtb_filename)
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()