1# Copyright (c) 2016 ARM Limited 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license --- 46 unchanged lines hidden (view full) --- 55 56default_dtb = 'armv8_gem5_v1_big_little_2_2.dtb' 57default_kernel = 'vmlinux4.3.aarch64' 58default_disk = 'aarch64-ubuntu-trusty-headless.img' 59default_rcs = 'bootscript.rcS' 60 61default_mem_size= "2GB" 62 |
63 64class BigCluster(devices.CpuCluster): 65 def __init__(self, system, num_cpus, cpu_clock, 66 cpu_voltage="1.0V"): 67 cpu_config = [ CpuConfig.get("arm_detailed"), devices.L1I, devices.L1D, 68 devices.WalkCache, devices.L2 ] 69 super(BigCluster, self).__init__(system, num_cpus, cpu_clock, 70 cpu_voltage, *cpu_config) 71 72class LittleCluster(devices.CpuCluster): 73 def __init__(self, system, num_cpus, cpu_clock, 74 cpu_voltage="1.0V"): 75 cpu_config = [ CpuConfig.get("minor"), devices.L1I, devices.L1D, 76 devices.WalkCache, devices.L2 ] 77 super(LittleCluster, self).__init__(system, num_cpus, cpu_clock, 78 cpu_voltage, *cpu_config) 79 80 81def createSystem(kernel, bootscript, disks=[]): |
82 sys = devices.SimpleSystem(kernel=SysPaths.binary(kernel), 83 readfile=bootscript, |
84 machine_type="DTOnly") 85 86 mem_region = sys.realview._mem_regions[0] 87 sys.mem_ctrls = SimpleMemory( 88 range=AddrRange(start=mem_region[0], size=default_mem_size)) 89 sys.mem_ctrls.port = sys.membus.master 90 91 sys.connect() --- 11 unchanged lines hidden (view full) --- 103 for dev in sys.pci_vio_block: 104 sys.attach_pci(dev) 105 106 sys.realview.setupBootLoader(sys.membus, sys, SysPaths.binary) 107 108 return sys 109 110 |
111def main(): 112 parser = argparse.ArgumentParser( 113 description="Generic ARM big.LITTLE configuration") 114 115 parser.add_argument("--restore-from", type=str, default=None, 116 help="Restore from checkpoint") 117 parser.add_argument("--dtb", type=str, default=default_dtb, 118 help="DTB file to load") --- 19 unchanged lines hidden (view full) --- 138 help="Big CPU clock frequency") 139 parser.add_argument("--little-cpu-clock", type=str, default="1GHz", 140 help="Little CPU clock frequency") 141 142 m5.ticks.fixGlobalFrequency() 143 144 options = parser.parse_args() 145 |
146 kernel_cmd = [ 147 "earlyprintk=pl011,0x1c090000", 148 "console=ttyAMA0", 149 "lpj=19988480", 150 "norandmaps", 151 "loglevel=8", 152 "mem=%s" % default_mem_size, 153 "root=/dev/vda1", 154 "rw", 155 "init=%s" % options.kernel_init, 156 "vmalloc=768MB", 157 ] 158 159 root = Root(full_system=True) 160 |
161 disks = default_disk if len(options.disk) == 0 else options.disk |
162 system = createSystem(options.kernel, options.bootscript, disks=disks) |
163 164 root.system = system 165 system.boot_osflags = " ".join(kernel_cmd) 166 |
167 AtomicCluster = devices.AtomicCluster |
168 |
169 if options.big_cpus + options.little_cpus == 0: 170 m5.util.panic("Empty CPU clusters") |
171 |
172 # big cluster 173 if options.big_cpus > 0: 174 if options.atomic: 175 system.bigCluster = AtomicCluster(system, options.big_cpus, 176 options.big_cpu_clock) 177 else: 178 system.bigCluster = BigCluster(system, options.big_cpus, 179 options.big_cpu_clock) 180 mem_mode = system.bigCluster.memoryMode() 181 # little cluster |
182 if options.little_cpus > 0: |
183 if options.atomic: 184 system.littleCluster = AtomicCluster(system, options.little_cpus, 185 options.little_cpu_clock) |
186 |
187 else: 188 system.littleCluster = LittleCluster(system, options.little_cpus, 189 options.little_cpu_clock) 190 mem_mode = system.littleCluster.memoryMode() |
191 |
192 if options.big_cpus > 0 and options.little_cpus > 0: 193 if system.bigCluster.memoryMode() != system.littleCluster.memoryMode(): 194 m5.util.panic("Memory mode missmatch among CPU clusters") 195 system.mem_mode = mem_mode |
196 |
197 # create caches 198 system.addCaches(options.caches, options.last_cache_level) 199 if not options.caches: 200 if options.big_cpus > 0 and system.bigCluster.requireCaches(): 201 m5.util.panic("Big CPU model requires caches") 202 if options.little_cpus > 0 and system.littleCluster.requireCaches(): 203 m5.util.panic("Little CPU model requires caches") 204 |
205 # Linux device tree 206 system.dtb_filename = SysPaths.binary(options.dtb) 207 208 # Get and load from the chkpt or simpoint checkpoint 209 if options.restore_from is not None: 210 m5.instantiate(options.restore_from) 211 else: 212 m5.instantiate() --- 19 unchanged lines hidden --- |