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# Copyright (c) 2021 The Regents of the University of California
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"""
"""
import argparse
import os
import time
import m5
import m5.ticks
from m5.objects import *
from system import *
supported_protocols = ["classic", "MI_example", "MESI_Two_Level",
"MOESI_CMP_directory"]
supported_cpu_types = ['kvm', 'atomic', 'simple', 'o3']
def parse_options():
parser = argparse.ArgumentParser(description='For use with gem5. Runs a '
'simple system through Linux boot. Expects the disk image to '
'call the simulator exit event after boot. Only works with '
'x86 ISA.')
parser.add_argument("--allow_listeners", default=False,
action="store_true",
help="Listeners disabled by default")
parser.add_argument("kernel", help="Path to the kernel binary to boot")
parser.add_argument("disk", help="Path to the disk image to boot")
parser.add_argument("cpu_type", choices=supported_cpu_types,
help="The type of CPU to use in the system")
parser.add_argument("mem_sys", choices=supported_protocols,
help="Type of memory system or coherence protocol")
parser.add_argument("num_cpus", type=int, help="Number of CPU cores")
parser.add_argument("boot_type", choices=["init", "systemd"],
help="How to boot the kernel. Either to a simple init "
"script or all of the way through systemd")
return parser.parse_args()
if __name__ == "__m5_main__":
args = parse_options()
# create the system we are going to simulate
if args.mem_sys == "classic":
system = MySystem(args.kernel, args.disk, args.cpu_type, args.num_cpus)
else:
system = MyRubySystem(args.kernel, args.disk, args.cpu_type,
args.mem_sys, args.num_cpus)
if args.boot_type == "init":
# Simply run "exit.sh"
system.workload.command_line += ' init=/root/exit.sh'
# set up the root SimObject and start the simulation
root = Root(full_system = True, system = system)
if system.getHostParallel():
# Required for running kvm on multiple host cores.
# Uses gem5's parallel event queue feature
# Note: The simulator is quite picky about this number!
root.sim_quantum = int(1e9) # 1 ms
# Required for long-running jobs
if not args.allow_listeners:
m5.disableAllListeners()
# instantiate all of the objects we've created above
m5.instantiate()
globalStart = time.time()
print("Running the simulation")
exit_event = m5.simulate()
if exit_event.getCause() != "m5_exit instruction encountered":
print("Failed to exit correctly")
exit(1)
else:
print("Success!")
exit(0)