configs/example/arm/starter_fs.py - public/gem5 - Git at Google

 # Copyright (c) 2016-2017, 2020, 2022 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.

 """This script is the full system example script from the ARM
 Research Starter Kit on System Modeling. More information can be found
 at: http://www.arm.com/ResearchEnablement/SystemModeling
 """

 import os
 import m5
 from m5.util import addToPath
 from m5.objects import *
 from m5.options import *
 import argparse

 m5.util.addToPath("../..")

 from common import SysPaths
 from common import ObjectList
 from common import MemConfig
 from common.cores.arm import O3_ARM_v7a, HPI

 import devices


 default_kernel = "vmlinux.arm64"
 default_disk = "linaro-minimal-aarch64.img"
 default_root_device = "/dev/vda1"


 # Pre-defined CPU configurations. Each tuple must be ordered as : (cpu_class,
 # l1_icache_class, l1_dcache_class, l2_Cache_class). Any of
 # the cache class may be 'None' if the particular cache is not present.
 cpu_types = {
     "atomic": (AtomicSimpleCPU, None, None, None),
     "minor": (MinorCPU, devices.L1I, devices.L1D, devices.L2),
     "hpi": (HPI.HPI, HPI.HPI_ICache, HPI.HPI_DCache, HPI.HPI_L2),
     "o3": (
         O3_ARM_v7a.O3_ARM_v7a_3,
         O3_ARM_v7a.O3_ARM_v7a_ICache,
         O3_ARM_v7a.O3_ARM_v7a_DCache,
         O3_ARM_v7a.O3_ARM_v7aL2,
     ),
 }


 def create_cow_image(name):
     """Helper function to create a Copy-on-Write disk image"""
     image = CowDiskImage()
     image.child.image_file = SysPaths.disk(name)

     return image


 def create(args):
     """Create and configure the system object."""

     if args.script and not os.path.isfile(args.script):
         print("Error: Bootscript %s does not exist" % args.script)
         sys.exit(1)

     cpu_class = cpu_types[args.cpu][0]
     mem_mode = cpu_class.memory_mode()
     # Only simulate caches when using a timing CPU (e.g., the HPI model)
     want_caches = True if mem_mode == "timing" else False

     system = devices.SimpleSystem(
         want_caches,
         args.mem_size,
         mem_mode=mem_mode,
         workload=ArmFsLinux(object_file=SysPaths.binary(args.kernel)),
         readfile=args.script,
     )

     MemConfig.config_mem(args, system)

     # Add the PCI devices we need for this system. The base system
     # doesn't have any PCI devices by default since they are assumed
     # to be added by the configuration scripts needing them.
     system.pci_devices = [
         # Create a VirtIO block device for the system's boot
         # disk. Attach the disk image using gem5's Copy-on-Write
         # functionality to avoid writing changes to the stored copy of
         # the disk image.
         PciVirtIO(vio=VirtIOBlock(image=create_cow_image(args.disk_image)))
     ]

     # Attach the PCI devices to the system. The helper method in the
     # system assigns a unique PCI bus ID to each of the devices and
     # connects them to the IO bus.
     for dev in system.pci_devices:
         system.attach_pci(dev)

     # Wire up the system's memory system
     system.connect()

     # Add CPU clusters to the system
     system.cpu_cluster = [
         devices.CpuCluster(
             system, args.num_cores, args.cpu_freq, "1.0V", *cpu_types[args.cpu]
         )
     ]

     # Create a cache hierarchy for the cluster. We are assuming that
     # clusters have core-private L1 caches and an L2 that's shared
     # within the cluster.
     system.addCaches(want_caches, last_cache_level=2)

     # Setup gem5's minimal Linux boot loader.
     system.realview.setupBootLoader(system, SysPaths.binary)

     if args.dtb:
         system.workload.dtb_filename = args.dtb
     else:
         # No DTB specified: autogenerate DTB
         system.workload.dtb_filename = os.path.join(
             m5.options.outdir, "system.dtb"
         )
         system.generateDtb(system.workload.dtb_filename)

     if args.initrd:
         system.workload.initrd_filename = args.initrd

     # Linux boot command flags
     kernel_cmd = [
         # Tell Linux to use the simulated serial port as a console
         "console=ttyAMA0",
         # Hard-code timi
         "lpj=19988480",
         # Disable address space randomisation to get a consistent
         # memory layout.
         "norandmaps",
         # Tell Linux where to find the root disk image.
         "root=%s" % args.root_device,
         # Mount the root disk read-write by default.
         "rw",
         # Tell Linux about the amount of physical memory present.
         "mem=%s" % args.mem_size,
     ]
     system.workload.command_line = " ".join(kernel_cmd)

     return system


 def run(args):
     cptdir = m5.options.outdir
     if args.checkpoint:
         print("Checkpoint directory: %s" % cptdir)

     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())


 def main():
     parser = argparse.ArgumentParser(epilog=__doc__)

     parser.add_argument(
         "--dtb", type=str, default=None, help="DTB file to load"
     )
     parser.add_argument(
         "--kernel", type=str, default=default_kernel, help="Linux kernel"
     )
     parser.add_argument(
         "--initrd",
         type=str,
         default=None,
         help="initrd/initramfs file to load",
     )
     parser.add_argument(
         "--disk-image",
         type=str,
         default=default_disk,
         help="Disk to instantiate",
     )
     parser.add_argument(
         "--root-device",
         type=str,
         default=default_root_device,
         help="OS device name for root partition (default: {})".format(
             default_root_device
         ),
     )
     parser.add_argument(
         "--script", type=str, default="", help="Linux bootscript"
     )
     parser.add_argument(
         "--cpu",
         type=str,
         choices=list(cpu_types.keys()),
         default="atomic",
         help="CPU model to use",
     )
     parser.add_argument("--cpu-freq", type=str, default="4GHz")
     parser.add_argument(
         "--num-cores", type=int, default=1, help="Number of CPU cores"
     )
     parser.add_argument(
         "--mem-type",
         default="DDR3_1600_8x8",
         choices=ObjectList.mem_list.get_names(),
         help="type of memory to use",
     )
     parser.add_argument(
         "--mem-channels", type=int, default=1, help="number of memory channels"
     )
     parser.add_argument(
         "--mem-ranks",
         type=int,
         default=None,
         help="number of memory ranks per channel",
     )
     parser.add_argument(
         "--mem-size",
         action="store",
         type=str,
         default="2GB",
         help="Specify the physical memory size",
     )
     parser.add_argument("--checkpoint", action="store_true")
     parser.add_argument("--restore", type=str, default=None)

     args = parser.parse_args()

     root = Root(full_system=True)
     root.system = create(args)

     if args.restore is not None:
         m5.instantiate(args.restore)
     else:
         m5.instantiate()

     run(args)


 if __name__ == "__m5_main__":
     main()
	# Copyright (c) 2016-2017, 2020, 2022 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.

	"""This script is the full system example script from the ARM
	Research Starter Kit on System Modeling. More information can be found
	at: http://www.arm.com/ResearchEnablement/SystemModeling
	"""

	import os
	import m5
	from m5.util import addToPath
	from m5.objects import *
	from m5.options import *
	import argparse

	m5.util.addToPath("../..")

	from common import SysPaths
	from common import ObjectList
	from common import MemConfig
	from common.cores.arm import O3_ARM_v7a, HPI

	import devices


	default_kernel = "vmlinux.arm64"
	default_disk = "linaro-minimal-aarch64.img"
	default_root_device = "/dev/vda1"


	# Pre-defined CPU configurations. Each tuple must be ordered as : (cpu_class,
	# l1_icache_class, l1_dcache_class, l2_Cache_class). Any of
	# the cache class may be 'None' if the particular cache is not present.
	cpu_types = {
	"atomic": (AtomicSimpleCPU, None, None, None),
	"minor": (MinorCPU, devices.L1I, devices.L1D, devices.L2),
	"hpi": (HPI.HPI, HPI.HPI_ICache, HPI.HPI_DCache, HPI.HPI_L2),
	"o3": (
	O3_ARM_v7a.O3_ARM_v7a_3,
	O3_ARM_v7a.O3_ARM_v7a_ICache,
	O3_ARM_v7a.O3_ARM_v7a_DCache,
	O3_ARM_v7a.O3_ARM_v7aL2,
	),
	}


	def create_cow_image(name):
	"""Helper function to create a Copy-on-Write disk image"""
	image = CowDiskImage()
	image.child.image_file = SysPaths.disk(name)

	return image


	def create(args):
	"""Create and configure the system object."""

	if args.script and not os.path.isfile(args.script):
	print("Error: Bootscript %s does not exist" % args.script)
	sys.exit(1)

	cpu_class = cpu_types[args.cpu][0]
	mem_mode = cpu_class.memory_mode()
	# Only simulate caches when using a timing CPU (e.g., the HPI model)
	want_caches = True if mem_mode == "timing" else False

	system = devices.SimpleSystem(
	want_caches,
	args.mem_size,
	mem_mode=mem_mode,
	workload=ArmFsLinux(object_file=SysPaths.binary(args.kernel)),
	readfile=args.script,
	)

	MemConfig.config_mem(args, system)

	# Add the PCI devices we need for this system. The base system
	# doesn't have any PCI devices by default since they are assumed
	# to be added by the configuration scripts needing them.
	system.pci_devices = [
	# Create a VirtIO block device for the system's boot
	# disk. Attach the disk image using gem5's Copy-on-Write
	# functionality to avoid writing changes to the stored copy of
	# the disk image.
	PciVirtIO(vio=VirtIOBlock(image=create_cow_image(args.disk_image)))
	]

	# Attach the PCI devices to the system. The helper method in the
	# system assigns a unique PCI bus ID to each of the devices and
	# connects them to the IO bus.
	for dev in system.pci_devices:
	system.attach_pci(dev)

	# Wire up the system's memory system
	system.connect()

	# Add CPU clusters to the system
	system.cpu_cluster = [
	devices.CpuCluster(
	system, args.num_cores, args.cpu_freq, "1.0V", *cpu_types[args.cpu]
	)
	]

	# Create a cache hierarchy for the cluster. We are assuming that
	# clusters have core-private L1 caches and an L2 that's shared
	# within the cluster.
	system.addCaches(want_caches, last_cache_level=2)

	# Setup gem5's minimal Linux boot loader.
	system.realview.setupBootLoader(system, SysPaths.binary)

	if args.dtb:
	system.workload.dtb_filename = args.dtb
	else:
	# No DTB specified: autogenerate DTB
	system.workload.dtb_filename = os.path.join(
	m5.options.outdir, "system.dtb"
	)
	system.generateDtb(system.workload.dtb_filename)

	if args.initrd:
	system.workload.initrd_filename = args.initrd

	# Linux boot command flags
	kernel_cmd = [
	# Tell Linux to use the simulated serial port as a console
	"console=ttyAMA0",
	# Hard-code timi
	"lpj=19988480",
	# Disable address space randomisation to get a consistent
	# memory layout.
	"norandmaps",
	# Tell Linux where to find the root disk image.
	"root=%s" % args.root_device,
	# Mount the root disk read-write by default.
	"rw",
	# Tell Linux about the amount of physical memory present.
	"mem=%s" % args.mem_size,
	]
	system.workload.command_line = " ".join(kernel_cmd)

	return system


	def run(args):
	cptdir = m5.options.outdir
	if args.checkpoint:
	print("Checkpoint directory: %s" % cptdir)

	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())


	def main():
	parser = argparse.ArgumentParser(epilog=__doc__)

	parser.add_argument(
	"--dtb", type=str, default=None, help="DTB file to load"
	)
	parser.add_argument(
	"--kernel", type=str, default=default_kernel, help="Linux kernel"
	)
	parser.add_argument(
	"--initrd",
	type=str,
	default=None,
	help="initrd/initramfs file to load",
	)
	parser.add_argument(
	"--disk-image",
	type=str,
	default=default_disk,
	help="Disk to instantiate",
	)
	parser.add_argument(
	"--root-device",
	type=str,
	default=default_root_device,
	help="OS device name for root partition (default: {})".format(
	default_root_device
	),
	)
	parser.add_argument(
	"--script", type=str, default="", help="Linux bootscript"
	)
	parser.add_argument(
	"--cpu",
	type=str,
	choices=list(cpu_types.keys()),
	default="atomic",
	help="CPU model to use",
	)
	parser.add_argument("--cpu-freq", type=str, default="4GHz")
	parser.add_argument(
	"--num-cores", type=int, default=1, help="Number of CPU cores"
	)
	parser.add_argument(
	"--mem-type",
	default="DDR3_1600_8x8",
	choices=ObjectList.mem_list.get_names(),
	help="type of memory to use",
	)
	parser.add_argument(
	"--mem-channels", type=int, default=1, help="number of memory channels"
	)
	parser.add_argument(
	"--mem-ranks",
	type=int,
	default=None,
	help="number of memory ranks per channel",
	)
	parser.add_argument(
	"--mem-size",
	action="store",
	type=str,
	default="2GB",
	help="Specify the physical memory size",
	)
	parser.add_argument("--checkpoint", action="store_true")
	parser.add_argument("--restore", type=str, default=None)

	args = parser.parse_args()

	root = Root(full_system=True)
	root.system = create(args)

	if args.restore is not None:
	m5.instantiate(args.restore)
	else:
	m5.instantiate()

	run(args)


	if __name__ == "__m5_main__":
	main()