# 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 # 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: Andreas Sandberg # Chuan Zhu # Gabor Dozsa # """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 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(want_caches, args.mem_size, mem_mode=mem_mode, kernel=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.membus, system, SysPaths.binary) if args.dtb: system.dtb_filename = args.dtb else: # No DTB specified: autogenerate DTB system.generateDtb(m5.options.outdir, 'system.dtb') # 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/vda1", # Mount the root disk read-write by default. "rw", # Tell Linux about the amount of physical memory present. "mem=%s" % args.mem_size, ] system.boot_osflags = " ".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=MemConfig.mem_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()