| # Copyright (c) 2016-2017 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 |
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| # (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 |
| """ |
| |
| from __future__ import print_function |
| from __future__ import absolute_import |
| |
| 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 HPI |
| |
| import devices |
| |
| |
| default_dist_version = '20170616' |
| default_kernel = 'vmlinux.vexpress_gem5_v1_64.' + default_dist_version |
| default_disk = 'linaro-minimal-aarch64.img' |
| |
| |
| # Pre-defined CPU configurations. Each tuple must be ordered as : (cpu_class, |
| # l1_icache_class, l1_dcache_class, walk_cache_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, None), |
| "minor" : (MinorCPU, |
| devices.L1I, devices.L1D, |
| devices.WalkCache, |
| devices.L2), |
| "hpi" : ( HPI.HPI, |
| HPI.HPI_ICache, HPI.HPI_DCache, |
| HPI.HPI_WalkCache, |
| HPI.HPI_L2) |
| } |
| |
| 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(ArmSystem, |
| 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 configurastion scripts needin 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. |
| for cluster in system.cpu_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) |
| |
| # 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=/dev/vda", |
| # 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("--disk-image", type=str, |
| default=default_disk, |
| help="Disk to instantiate") |
| parser.add_argument("--script", type=str, default="", |
| help = "Linux bootscript") |
| parser.add_argument("--cpu", type=str, choices=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() |
