gem5/configs/example/arm/fs_bigLITTLE.py
Andreas Hansson 2f5262eb67 config: Make configs/common a Python package
Continue along the same line as the recent patch that made the
Ruby-related config scripts Python packages and make also the
configs/common directory a package.

All affected config scripts are updated (hopefully).

Note that this change makes it apparent that the current organisation
and naming of the config directory and its subdirectories is rather
chaotic. We mix scripts that are directly invoked with scripts that
merely contain convenience functions. While it is not addressed in
this patch we should follow up with a re-organisation of the
config structure, and renaming of some of the packages.
2016-10-14 10:37:38 -04:00

232 lines
9 KiB
Python

# Copyright (c) 2016 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.
#
# 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.
#
# Authors: Gabor Dozsa
# Andreas Sandberg
# This is an example configuration script for full system simulation of
# a generic ARM bigLITTLE system.
import argparse
import os
import sys
import m5
from m5.objects import *
m5.util.addToPath("../../")
from common import SysPaths
from common import CpuConfig
import devices
default_dtb = 'armv8_gem5_v1_big_little_2_2.dtb'
default_kernel = 'vmlinux4.3.aarch64'
default_disk = 'aarch64-ubuntu-trusty-headless.img'
default_rcs = 'bootscript.rcS'
default_mem_size= "2GB"
class BigCluster(devices.CpuCluster):
def __init__(self, system, num_cpus, cpu_clock,
cpu_voltage="1.0V"):
cpu_config = [ CpuConfig.get("arm_detailed"), 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 = [ CpuConfig.get("minor"), devices.L1I, devices.L1D,
devices.WalkCache, devices.L2 ]
super(LittleCluster, self).__init__(system, num_cpus, cpu_clock,
cpu_voltage, *cpu_config)
def createSystem(kernel, bootscript, disks=[]):
sys = devices.SimpleSystem(kernel=SysPaths.binary(kernel),
readfile=bootscript,
machine_type="DTOnly")
mem_region = sys.realview._mem_regions[0]
sys.mem_ctrls = SimpleMemory(
range=AddrRange(start=mem_region[0], size=default_mem_size))
sys.mem_ctrls.port = sys.membus.master
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.membus, sys, SysPaths.binary)
return sys
def main():
parser = argparse.ArgumentParser(
description="Generic ARM big.LITTLE configuration")
parser.add_argument("--restore-from", type=str, default=None,
help="Restore from checkpoint")
parser.add_argument("--dtb", type=str, default=default_dtb,
help="DTB file to load")
parser.add_argument("--kernel", type=str, default=default_kernel,
help="Linux kernel")
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("--atomic", action="store_true", default=False,
help="Use atomic CPUs")
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")
m5.ticks.fixGlobalFrequency()
options = parser.parse_args()
kernel_cmd = [
"earlyprintk=pl011,0x1c090000",
"console=ttyAMA0",
"lpj=19988480",
"norandmaps",
"loglevel=8",
"mem=%s" % default_mem_size,
"root=/dev/vda1",
"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.kernel, options.bootscript, disks=disks)
root.system = system
system.boot_osflags = " ".join(kernel_cmd)
AtomicCluster = devices.AtomicCluster
if options.big_cpus + options.little_cpus == 0:
m5.util.panic("Empty CPU clusters")
# big cluster
if options.big_cpus > 0:
if options.atomic:
system.bigCluster = AtomicCluster(system, options.big_cpus,
options.big_cpu_clock)
else:
system.bigCluster = BigCluster(system, options.big_cpus,
options.big_cpu_clock)
mem_mode = system.bigCluster.memoryMode()
# little cluster
if options.little_cpus > 0:
if options.atomic:
system.littleCluster = AtomicCluster(system, options.little_cpus,
options.little_cpu_clock)
else:
system.littleCluster = LittleCluster(system, options.little_cpus,
options.little_cpu_clock)
mem_mode = system.littleCluster.memoryMode()
if options.big_cpus > 0 and options.little_cpus > 0:
if system.bigCluster.memoryMode() != system.littleCluster.memoryMode():
m5.util.panic("Memory mode missmatch among CPU clusters")
system.mem_mode = mem_mode
# 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")
# Linux device tree
system.dtb_filename = SysPaths.binary(options.dtb)
# Get and load from the chkpt or simpoint checkpoint
if options.restore_from is not None:
m5.instantiate(options.restore_from)
else:
m5.instantiate()
# 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(m5.options.outdir, "cpt.%d" % m5.curTick())
m5.checkpoint(os.path.join(cpt_dir))
print "Checkpoint done."
else:
print exit_msg, " @ ", m5.curTick()
break
sys.exit(event.getCode())
if __name__ == "__m5_main__":
main()