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| -rw-r--r-- | configs/example/arm/starter_fs.py | 242 |
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diff --git a/configs/example/arm/starter_fs.py b/configs/example/arm/starter_fs.py new file mode 100644 index 000000000..9b6f68f55 --- /dev/null +++ b/configs/example/arm/starter_fs.py @@ -0,0 +1,242 @@ +# 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 +""" + +import os +import m5 +from m5.util import addToPath +from m5.objects 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 not args.dtb: + dtb_file = SysPaths.binary("armv8_gem5_v1_%icpu.%s.dtb" % + (args.num_cores, default_dist_version)) + else: + dtb_file = args.dtb + + 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, + dtb_filename=dtb_file, + kernel=SysPaths.binary(args.kernel), + readfile=args.script, + machine_type="DTOnly") + + 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) + + # 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() |