def createSystem(kernel, mem_mode, bootscript, disks=[]): sys = devices.SimpleSystem(kernel=SysPaths.binary(kernel), readfile=bootscript, mem_mode=mem_mode, 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() if options.atomic: cpu_config = { 'cpu' : AtomicSimpleCPU } big_cpu_config, little_cpu_config = cpu_config, cpu_config else: big_cpu_config = { 'cpu' : CpuConfig.get("arm_detailed"), 'l1i' : devices.L1I, 'l1d' : devices.L1D, 'wcache' : devices.WalkCache, 'l2' : devices.L2 } little_cpu_config = { 'cpu' : MinorCPU, 'l1i' : devices.L1I, 'l1d' : devices.L1D, 'wcache' : devices.WalkCache, 'l2' : devices.L2 } big_cpu_class = big_cpu_config['cpu'] little_cpu_class = little_cpu_config['cpu'] 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) assert big_cpu_class.memory_mode() == little_cpu_class.memory_mode() disks = default_disk if len(options.disk) == 0 else options.disk system = createSystem(options.kernel, big_cpu_class.memory_mode(), options.bootscript, disks=disks) root.system = system system.boot_osflags = " ".join(kernel_cmd) # big cluster if options.big_cpus > 0: system.bigCluster = CpuCluster() system.bigCluster.addCPUs(big_cpu_config, options.big_cpus, options.big_cpu_clock) # LITTLE cluster if options.little_cpus > 0: system.littleCluster = CpuCluster() system.littleCluster.addCPUs(little_cpu_config, options.little_cpus, options.little_cpu_clock) # add caches if options.caches: cluster_mem_bus = addCaches(system, options.last_cache_level) else: if big_cpu_class.require_caches(): m5.util.panic("CPU model %s requires caches" % str(big_cpu_class)) if little_cpu_class.require_caches(): m5.util.panic("CPU model %s requires caches" % str(little_cpu_class)) cluster_mem_bus = system.membus # connect each cluster to the memory hierarchy for cluster in system._clusters: cluster.connectMemSide(cluster_mem_bus) # 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())
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())