Options.py revision 10993
19665Sandreas.hansson@arm.com# Copyright (c) 2013 ARM Limited 29665Sandreas.hansson@arm.com# All rights reserved. 39665Sandreas.hansson@arm.com# 49665Sandreas.hansson@arm.com# The license below extends only to copyright in the software and shall 59665Sandreas.hansson@arm.com# not be construed as granting a license to any other intellectual 69665Sandreas.hansson@arm.com# property including but not limited to intellectual property relating 79665Sandreas.hansson@arm.com# to a hardware implementation of the functionality of the software 89665Sandreas.hansson@arm.com# licensed hereunder. You may use the software subject to the license 99665Sandreas.hansson@arm.com# terms below provided that you ensure that this notice is replicated 109665Sandreas.hansson@arm.com# unmodified and in its entirety in all distributions of the software, 119665Sandreas.hansson@arm.com# modified or unmodified, in source code or in binary form. 129665Sandreas.hansson@arm.com# 135353Svilas.sridharan@gmail.com# Copyright (c) 2006-2008 The Regents of The University of Michigan 143395Shsul@eecs.umich.edu# All rights reserved. 153395Shsul@eecs.umich.edu# 163395Shsul@eecs.umich.edu# Redistribution and use in source and binary forms, with or without 173395Shsul@eecs.umich.edu# modification, are permitted provided that the following conditions are 183395Shsul@eecs.umich.edu# met: redistributions of source code must retain the above copyright 193395Shsul@eecs.umich.edu# notice, this list of conditions and the following disclaimer; 203395Shsul@eecs.umich.edu# redistributions in binary form must reproduce the above copyright 213395Shsul@eecs.umich.edu# notice, this list of conditions and the following disclaimer in the 223395Shsul@eecs.umich.edu# documentation and/or other materials provided with the distribution; 233395Shsul@eecs.umich.edu# neither the name of the copyright holders nor the names of its 243395Shsul@eecs.umich.edu# contributors may be used to endorse or promote products derived from 253395Shsul@eecs.umich.edu# this software without specific prior written permission. 263395Shsul@eecs.umich.edu# 273395Shsul@eecs.umich.edu# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 283395Shsul@eecs.umich.edu# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 293395Shsul@eecs.umich.edu# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 303395Shsul@eecs.umich.edu# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 313395Shsul@eecs.umich.edu# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 323395Shsul@eecs.umich.edu# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 333395Shsul@eecs.umich.edu# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 343395Shsul@eecs.umich.edu# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 353395Shsul@eecs.umich.edu# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 363395Shsul@eecs.umich.edu# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 373395Shsul@eecs.umich.edu# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 383395Shsul@eecs.umich.edu# 393395Shsul@eecs.umich.edu# Authors: Lisa Hsu 403395Shsul@eecs.umich.edu 418920Snilay@cs.wisc.eduimport m5 428920Snilay@cs.wisc.edufrom m5.defines import buildEnv 438920Snilay@cs.wisc.edufrom m5.objects import * 448920Snilay@cs.wisc.edufrom Benchmarks import * 457025SBrad.Beckmann@amd.com 469520SAndreas.Sandberg@ARM.comimport CpuConfig 479665Sandreas.hansson@arm.comimport MemConfig 489520SAndreas.Sandberg@ARM.com 4910747SChris.Emmons@arm.comfrom FSConfig import os_types 5010747SChris.Emmons@arm.com 519520SAndreas.Sandberg@ARM.comdef _listCpuTypes(option, opt, value, parser): 529520SAndreas.Sandberg@ARM.com CpuConfig.print_cpu_list() 539520SAndreas.Sandberg@ARM.com sys.exit(0) 549520SAndreas.Sandberg@ARM.com 559665Sandreas.hansson@arm.comdef _listMemTypes(option, opt, value, parser): 569665Sandreas.hansson@arm.com MemConfig.print_mem_list() 579665Sandreas.hansson@arm.com sys.exit(0) 589665Sandreas.hansson@arm.com 598920Snilay@cs.wisc.edudef addCommonOptions(parser): 608920Snilay@cs.wisc.edu # system options 619520SAndreas.Sandberg@ARM.com parser.add_option("--list-cpu-types", 629520SAndreas.Sandberg@ARM.com action="callback", callback=_listCpuTypes, 639520SAndreas.Sandberg@ARM.com help="List available CPU types") 648920Snilay@cs.wisc.edu parser.add_option("--cpu-type", type="choice", default="atomic", 659520SAndreas.Sandberg@ARM.com choices=CpuConfig.cpu_names(), 668920Snilay@cs.wisc.edu help = "type of cpu to run with") 678920Snilay@cs.wisc.edu parser.add_option("--checker", action="store_true"); 688920Snilay@cs.wisc.edu parser.add_option("-n", "--num-cpus", type="int", default=1) 699827Sakash.bagdia@arm.com parser.add_option("--sys-voltage", action="store", type="string", 709827Sakash.bagdia@arm.com default='1.0V', 719827Sakash.bagdia@arm.com help = """Top-level voltage for blocks running at system 729827Sakash.bagdia@arm.com power supply""") 739790Sakash.bagdia@arm.com parser.add_option("--sys-clock", action="store", type="string", 749790Sakash.bagdia@arm.com default='1GHz', 759790Sakash.bagdia@arm.com help = """Top-level clock for blocks running at system 769790Sakash.bagdia@arm.com speed""") 779789Sakash.bagdia@arm.com parser.add_option("--cpu-clock", action="store", type="string", 789789Sakash.bagdia@arm.com default='2GHz', 799789Sakash.bagdia@arm.com help="Clock for blocks running at CPU speed") 809800Snilay@cs.wisc.edu parser.add_option("--smt", action="store_true", default=False, 819800Snilay@cs.wisc.edu help = """ 829800Snilay@cs.wisc.edu Only used if multiple programs are specified. If true, 839800Snilay@cs.wisc.edu then the number of threads per cpu is same as the 849800Snilay@cs.wisc.edu number of programs.""") 859800Snilay@cs.wisc.edu 869800Snilay@cs.wisc.edu # Memory Options 879800Snilay@cs.wisc.edu parser.add_option("--list-mem-types", 889800Snilay@cs.wisc.edu action="callback", callback=_listMemTypes, 899800Snilay@cs.wisc.edu help="List available memory types") 9010789Sandreas.hansson@arm.com parser.add_option("--mem-type", type="choice", default="DDR3_1600_x64", 919800Snilay@cs.wisc.edu choices=MemConfig.mem_names(), 929800Snilay@cs.wisc.edu help = "type of memory to use") 939836Sandreas.hansson@arm.com parser.add_option("--mem-channels", type="int", default=1, 949836Sandreas.hansson@arm.com help = "number of memory channels") 9510620Sandreas.hansson@arm.com parser.add_option("--mem-ranks", type="int", default=None, 9610620Sandreas.hansson@arm.com help = "number of memory ranks per channel") 979800Snilay@cs.wisc.edu parser.add_option("--mem-size", action="store", type="string", 989800Snilay@cs.wisc.edu default="512MB", 999800Snilay@cs.wisc.edu help="Specify the physical memory size (single memory)") 1009800Snilay@cs.wisc.edu 10110037SARM gem5 Developers parser.add_option("-l", "--lpae", action="store_true") 10210037SARM gem5 Developers parser.add_option("-V", "--virtualisation", action="store_true") 10310037SARM gem5 Developers 10410613SMarco.Elver@ARM.com parser.add_option("--memchecker", action="store_true") 10510613SMarco.Elver@ARM.com 1069800Snilay@cs.wisc.edu # Cache Options 10710780SCurtis.Dunham@arm.com parser.add_option("--external-memory-system", type="string", 10810780SCurtis.Dunham@arm.com help="use external ports of this port_type for caches") 10910993Sjungma@eit.uni-kl.de parser.add_option("--tlm-memory", type="string", 11010993Sjungma@eit.uni-kl.de help="use external port for SystemC TLM cosimulation") 1119800Snilay@cs.wisc.edu parser.add_option("--caches", action="store_true") 1129800Snilay@cs.wisc.edu parser.add_option("--l2cache", action="store_true") 1139800Snilay@cs.wisc.edu parser.add_option("--fastmem", action="store_true") 1148920Snilay@cs.wisc.edu parser.add_option("--num-dirs", type="int", default=1) 1158920Snilay@cs.wisc.edu parser.add_option("--num-l2caches", type="int", default=1) 1168920Snilay@cs.wisc.edu parser.add_option("--num-l3caches", type="int", default=1) 1178920Snilay@cs.wisc.edu parser.add_option("--l1d_size", type="string", default="64kB") 1188920Snilay@cs.wisc.edu parser.add_option("--l1i_size", type="string", default="32kB") 1198920Snilay@cs.wisc.edu parser.add_option("--l2_size", type="string", default="2MB") 1208920Snilay@cs.wisc.edu parser.add_option("--l3_size", type="string", default="16MB") 1218920Snilay@cs.wisc.edu parser.add_option("--l1d_assoc", type="int", default=2) 1228920Snilay@cs.wisc.edu parser.add_option("--l1i_assoc", type="int", default=2) 1238920Snilay@cs.wisc.edu parser.add_option("--l2_assoc", type="int", default=8) 1248920Snilay@cs.wisc.edu parser.add_option("--l3_assoc", type="int", default=16) 1258920Snilay@cs.wisc.edu parser.add_option("--cacheline_size", type="int", default=64) 1269800Snilay@cs.wisc.edu 1279800Snilay@cs.wisc.edu # Enable Ruby 1288920Snilay@cs.wisc.edu parser.add_option("--ruby", action="store_true") 1293395Shsul@eecs.umich.edu 1308920Snilay@cs.wisc.edu # Run duration options 1319909Snilay@cs.wisc.edu parser.add_option("-m", "--abs-max-tick", type="int", default=m5.MaxTick, 1329816Sjthestness@gmail.com metavar="TICKS", help="Run to absolute simulated tick " \ 1339816Sjthestness@gmail.com "specified including ticks from a restored checkpoint") 1349816Sjthestness@gmail.com parser.add_option("--rel-max-tick", type="int", default=None, 1359816Sjthestness@gmail.com metavar="TICKS", help="Simulate for specified number of" \ 1369816Sjthestness@gmail.com " ticks relative to the simulation start tick (e.g. if " \ 1379816Sjthestness@gmail.com "restoring a checkpoint)") 1389816Sjthestness@gmail.com parser.add_option("--maxtime", type="float", default=None, 1399816Sjthestness@gmail.com help="Run to the specified absolute simulated time in " \ 1409816Sjthestness@gmail.com "seconds") 1418920Snilay@cs.wisc.edu parser.add_option("-I", "--maxinsts", action="store", type="int", 1428920Snilay@cs.wisc.edu default=None, help="""Total number of instructions to 1438920Snilay@cs.wisc.edu simulate (default: run forever)""") 1448920Snilay@cs.wisc.edu parser.add_option("--work-item-id", action="store", type="int", 1458920Snilay@cs.wisc.edu help="the specific work id for exit & checkpointing") 14610159Sgedare@rtems.org parser.add_option("--num-work-ids", action="store", type="int", 14710159Sgedare@rtems.org help="Number of distinct work item types") 1488920Snilay@cs.wisc.edu parser.add_option("--work-begin-cpu-id-exit", action="store", type="int", 1498920Snilay@cs.wisc.edu help="exit when work starts on the specified cpu") 1508920Snilay@cs.wisc.edu parser.add_option("--work-end-exit-count", action="store", type="int", 1518920Snilay@cs.wisc.edu help="exit at specified work end count") 1528920Snilay@cs.wisc.edu parser.add_option("--work-begin-exit-count", action="store", type="int", 1538920Snilay@cs.wisc.edu help="exit at specified work begin count") 1548920Snilay@cs.wisc.edu parser.add_option("--init-param", action="store", type="int", default=0, 1558920Snilay@cs.wisc.edu help="""Parameter available in simulation with m5 1568920Snilay@cs.wisc.edu initparam""") 15710757SCurtis.Dunham@arm.com parser.add_option("--initialize-only", action="store_true", default=False, 15810757SCurtis.Dunham@arm.com help="""Exit after initialization. Do not simulate time. 15910757SCurtis.Dunham@arm.com Useful when gem5 is run as a library.""") 1606776SBrad.Beckmann@amd.com 1619800Snilay@cs.wisc.edu # Simpoint options 1629800Snilay@cs.wisc.edu parser.add_option("--simpoint-profile", action="store_true", 1639800Snilay@cs.wisc.edu help="Enable basic block profiling for SimPoints") 1649800Snilay@cs.wisc.edu parser.add_option("--simpoint-interval", type="int", default=10000000, 1659800Snilay@cs.wisc.edu help="SimPoint interval in num of instructions") 16610608Sdam.sunwoo@arm.com parser.add_option("--take-simpoint-checkpoints", action="store", type="string", 16710608Sdam.sunwoo@arm.com help="<simpoint file,weight file,interval-length,warmup-length>") 16810608Sdam.sunwoo@arm.com parser.add_option("--restore-simpoint-checkpoint", action="store_true", 16910608Sdam.sunwoo@arm.com help="restore from a simpoint checkpoint taken with " + 17010608Sdam.sunwoo@arm.com "--take-simpoint-checkpoints") 1719800Snilay@cs.wisc.edu 1728920Snilay@cs.wisc.edu # Checkpointing options 1738920Snilay@cs.wisc.edu ###Note that performing checkpointing via python script files will override 1748920Snilay@cs.wisc.edu ###checkpoint instructions built into binaries. 1758920Snilay@cs.wisc.edu parser.add_option("--take-checkpoints", action="store", type="string", 1769357Sandreas.hansson@arm.com help="<M,N> take checkpoints at tick M and every N ticks thereafter") 1778920Snilay@cs.wisc.edu parser.add_option("--max-checkpoints", action="store", type="int", 1788920Snilay@cs.wisc.edu help="the maximum number of checkpoints to drop", default=5) 1798920Snilay@cs.wisc.edu parser.add_option("--checkpoint-dir", action="store", type="string", 1808920Snilay@cs.wisc.edu help="Place all checkpoints in this absolute directory") 1818920Snilay@cs.wisc.edu parser.add_option("-r", "--checkpoint-restore", action="store", type="int", 1828920Snilay@cs.wisc.edu help="restore from checkpoint <N>") 1838920Snilay@cs.wisc.edu parser.add_option("--checkpoint-at-end", action="store_true", 1848920Snilay@cs.wisc.edu help="take a checkpoint at end of run") 1858920Snilay@cs.wisc.edu parser.add_option("--work-begin-checkpoint-count", action="store", type="int", 1868920Snilay@cs.wisc.edu help="checkpoint at specified work begin count") 1878920Snilay@cs.wisc.edu parser.add_option("--work-end-checkpoint-count", action="store", type="int", 1888920Snilay@cs.wisc.edu help="checkpoint at specified work end count") 1898920Snilay@cs.wisc.edu parser.add_option("--work-cpus-checkpoint-count", action="store", type="int", 1908920Snilay@cs.wisc.edu help="checkpoint and exit when active cpu count is reached") 1918920Snilay@cs.wisc.edu parser.add_option("--restore-with-cpu", action="store", type="choice", 1929736Sandreas@sandberg.pp.se default="atomic", choices=CpuConfig.cpu_names(), 1938920Snilay@cs.wisc.edu help = "cpu type for restoring from a checkpoint") 1943395Shsul@eecs.umich.edu 1955361Srstrong@cs.ucsd.edu 1968920Snilay@cs.wisc.edu # CPU Switching - default switch model goes from a checkpoint 1978920Snilay@cs.wisc.edu # to a timing simple CPU with caches to warm up, then to detailed CPU for 1988920Snilay@cs.wisc.edu # data measurement 1999151Satgutier@umich.edu parser.add_option("--repeat-switch", action="store", type="int", 2009151Satgutier@umich.edu default=None, 2019151Satgutier@umich.edu help="switch back and forth between CPUs with period <N>") 2029151Satgutier@umich.edu parser.add_option("-s", "--standard-switch", action="store", type="int", 2039151Satgutier@umich.edu default=None, 2049151Satgutier@umich.edu help="switch from timing to Detailed CPU after warmup period of <N>") 2059562Ssaidi@eecs.umich.edu parser.add_option("-p", "--prog-interval", type="str", 2068920Snilay@cs.wisc.edu help="CPU Progress Interval") 2078920Snilay@cs.wisc.edu 2088920Snilay@cs.wisc.edu # Fastforwarding and simpoint related materials 2098920Snilay@cs.wisc.edu parser.add_option("-W", "--warmup-insts", action="store", type="int", 2108920Snilay@cs.wisc.edu default=None, 2118920Snilay@cs.wisc.edu help="Warmup period in total instructions (requires --standard-switch)") 2128920Snilay@cs.wisc.edu parser.add_option("--bench", action="store", type="string", default=None, 2138920Snilay@cs.wisc.edu help="base names for --take-checkpoint and --checkpoint-restore") 2148920Snilay@cs.wisc.edu parser.add_option("-F", "--fast-forward", action="store", type="string", 2158920Snilay@cs.wisc.edu default=None, 2168920Snilay@cs.wisc.edu help="Number of instructions to fast forward before switching") 2178920Snilay@cs.wisc.edu parser.add_option("-S", "--simpoint", action="store_true", default=False, 2188920Snilay@cs.wisc.edu help="""Use workload simpoints as an instruction offset for 2198920Snilay@cs.wisc.edu --checkpoint-restore or --take-checkpoint.""") 2208920Snilay@cs.wisc.edu parser.add_option("--at-instruction", action="store_true", default=False, 2218920Snilay@cs.wisc.edu help="""Treat value of --checkpoint-restore or --take-checkpoint as a 2228920Snilay@cs.wisc.edu number of instructions.""") 22310037SARM gem5 Developers parser.add_option("--spec-input", default="ref", type="choice", 22410037SARM gem5 Developers choices=["ref", "test", "train", "smred", "mdred", 22510037SARM gem5 Developers "lgred"], 22610037SARM gem5 Developers help="Input set size for SPEC CPU2000 benchmarks.") 22710037SARM gem5 Developers parser.add_option("--arm-iset", default="arm", type="choice", 22810037SARM gem5 Developers choices=["arm", "thumb", "aarch64"], 22910037SARM gem5 Developers help="ARM instruction set.") 23010037SARM gem5 Developers 2318920Snilay@cs.wisc.edu 2328920Snilay@cs.wisc.edudef addSEOptions(parser): 2338920Snilay@cs.wisc.edu # Benchmark options 2348920Snilay@cs.wisc.edu parser.add_option("-c", "--cmd", default="", 2358920Snilay@cs.wisc.edu help="The binary to run in syscall emulation mode.") 2368920Snilay@cs.wisc.edu parser.add_option("-o", "--options", default="", 2378920Snilay@cs.wisc.edu help="""The options to pass to the binary, use " " 2388920Snilay@cs.wisc.edu around the entire string""") 23910803Sbrandon.potter@amd.com parser.add_option("-e", "--env", default="", 24010803Sbrandon.potter@amd.com help="Initialize workload environment from text file.") 2418920Snilay@cs.wisc.edu parser.add_option("-i", "--input", default="", 2428920Snilay@cs.wisc.edu help="Read stdin from a file.") 2438920Snilay@cs.wisc.edu parser.add_option("--output", default="", 2448920Snilay@cs.wisc.edu help="Redirect stdout to a file.") 2458920Snilay@cs.wisc.edu parser.add_option("--errout", default="", 2468920Snilay@cs.wisc.edu help="Redirect stderr to a file.") 2478920Snilay@cs.wisc.edu 2488920Snilay@cs.wisc.edudef addFSOptions(parser): 2498920Snilay@cs.wisc.edu # Simulation options 2508920Snilay@cs.wisc.edu parser.add_option("--timesync", action="store_true", 2518920Snilay@cs.wisc.edu help="Prevent simulated time from getting ahead of real time") 2528920Snilay@cs.wisc.edu 2538920Snilay@cs.wisc.edu # System options 2548920Snilay@cs.wisc.edu parser.add_option("--kernel", action="store", type="string") 25510747SChris.Emmons@arm.com parser.add_option("--os-type", action="store", type="choice", 25610747SChris.Emmons@arm.com choices=os_types[buildEnv['TARGET_ISA']], default="linux", 25710747SChris.Emmons@arm.com help="Specifies type of OS to boot") 2588920Snilay@cs.wisc.edu parser.add_option("--script", action="store", type="string") 2598920Snilay@cs.wisc.edu parser.add_option("--frame-capture", action="store_true", 2608920Snilay@cs.wisc.edu help="Stores changed frame buffers from the VNC server to compressed "\ 2618920Snilay@cs.wisc.edu "files in the gem5 output directory") 2628920Snilay@cs.wisc.edu 2638920Snilay@cs.wisc.edu if buildEnv['TARGET_ISA'] == "arm": 2648920Snilay@cs.wisc.edu parser.add_option("--bare-metal", action="store_true", 2658920Snilay@cs.wisc.edu help="Provide the raw system without the linux specific bits") 2668920Snilay@cs.wisc.edu parser.add_option("--machine-type", action="store", type="choice", 26710512SAli.Saidi@ARM.com choices=ArmMachineType.map.keys(), default="VExpress_EMM") 2689539Satgutier@umich.edu parser.add_option("--dtb-filename", action="store", type="string", 2699539Satgutier@umich.edu help="Specifies device tree blob file to use with device-tree-"\ 2709539Satgutier@umich.edu "enabled kernels") 2719935Sdam.sunwoo@arm.com parser.add_option("--enable-context-switch-stats-dump", \ 2729935Sdam.sunwoo@arm.com action="store_true", help="Enable stats dump at context "\ 2739935Sdam.sunwoo@arm.com "switches and dump tasks file (required for Streamline)") 2749935Sdam.sunwoo@arm.com 2758920Snilay@cs.wisc.edu # Benchmark options 2768920Snilay@cs.wisc.edu parser.add_option("--dual", action="store_true", 2778920Snilay@cs.wisc.edu help="Simulate two systems attached with an ethernet link") 2788920Snilay@cs.wisc.edu parser.add_option("-b", "--benchmark", action="store", type="string", 2798920Snilay@cs.wisc.edu dest="benchmark", 2808920Snilay@cs.wisc.edu help="Specify the benchmark to run. Available benchmarks: %s"\ 2818920Snilay@cs.wisc.edu % DefinedBenchmarks) 2828920Snilay@cs.wisc.edu 2838920Snilay@cs.wisc.edu # Metafile options 2848920Snilay@cs.wisc.edu parser.add_option("--etherdump", action="store", type="string", dest="etherdump", 2858920Snilay@cs.wisc.edu help="Specify the filename to dump a pcap capture of the" \ 2868920Snilay@cs.wisc.edu "ethernet traffic") 2878956Sjayneel@cs.wisc.edu 2888956Sjayneel@cs.wisc.edu # Disk Image Options 2898956Sjayneel@cs.wisc.edu parser.add_option("--disk-image", action="store", type="string", default=None, 2908956Sjayneel@cs.wisc.edu help="Path to the disk image to use.") 29110697SCurtis.Dunham@arm.com parser.add_option("--root-device", action="store", type="string", default=None, 29210697SCurtis.Dunham@arm.com help="OS device name for root partition") 29310594Sgabeblack@google.com 29410594Sgabeblack@google.com # Command line options 29510594Sgabeblack@google.com parser.add_option("--command-line", action="store", type="string", 29610594Sgabeblack@google.com default=None, 29710594Sgabeblack@google.com help="Template for the kernel command line.") 29810594Sgabeblack@google.com parser.add_option("--command-line-file", action="store", 29910594Sgabeblack@google.com default=None, type="string", 30010594Sgabeblack@google.com help="File with a template for the kernel command line") 301