fs_bigLITTLE.py (11569:2eae1dfaa791) fs_bigLITTLE.py (11630:6e2408ad4425)
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

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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
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

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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
63def createSystem(kernel, mem_mode, bootscript, disks=[]):
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=[]):
64 sys = devices.SimpleSystem(kernel=SysPaths.binary(kernel),
65 readfile=bootscript,
82 sys = devices.SimpleSystem(kernel=SysPaths.binary(kernel),
83 readfile=bootscript,
66 mem_mode=mem_mode,
67 machine_type="DTOnly")
68
69 mem_region = sys.realview._mem_regions[0]
70 sys.mem_ctrls = SimpleMemory(
71 range=AddrRange(start=mem_region[0], size=default_mem_size))
72 sys.mem_ctrls.port = sys.membus.master
73
74 sys.connect()

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86 for dev in sys.pci_vio_block:
87 sys.attach_pci(dev)
88
89 sys.realview.setupBootLoader(sys.membus, sys, SysPaths.binary)
90
91 return sys
92
93
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()

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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
94class CpuCluster(SubSystem):
95 def addCPUs(self, cpu_config, num_cpus, cpu_clock, cpu_voltage="1.0V"):
96 try:
97 self._cluster_id
98 m5.util.panic("CpuCluster.addCPUs() must be called exactly once")
99 except AttributeError:
100 pass
101
102 assert num_cpus > 0
103 system = self._parent
104 self._cluster_id = len(system._clusters)
105 system._clusters.append(self)
106 self._config = cpu_config
107
108 self.voltage_domain = VoltageDomain(voltage=cpu_voltage)
109 self.clk_domain = SrcClockDomain(clock=cpu_clock,
110 voltage_domain=self.voltage_domain)
111
112 cpu_class = cpu_config['cpu']
113 self.cpus = [ cpu_class(cpu_id=len(system._cpus) + idx,
114 clk_domain=self.clk_domain)
115 for idx in range(num_cpus) ]
116
117 for cpu in self.cpus:
118 cpu.createThreads()
119 cpu.createInterruptController()
120 cpu.socket_id = self._cluster_id
121 system._cpus.append(cpu)
122
123 def createCache(self, key):
124 try:
125 return self._config[key]()
126 except KeyError:
127 return None
128
129 def addL1(self):
130 self._cluster_id
131 for cpu in self.cpus:
132 l1i = self.createCache('l1i')
133 l1d = self.createCache('l1d')
134 iwc = self.createCache('wcache')
135 dwc = self.createCache('wcache')
136 cpu.addPrivateSplitL1Caches(l1i, l1d, iwc, dwc)
137
138 def addL2(self, clk_domain):
139 self._cluster_id
140 self.toL2Bus = L2XBar(width=64, clk_domain=clk_domain)
141 #self.toL2Bus = L2XBar(width=64, clk_domain=clk_domain,
142 #snoop_filter=NULL)
143 self.l2 = self._config['l2']()
144 for cpu in self.cpus:
145 cpu.connectAllPorts(self.toL2Bus)
146 self.toL2Bus.master = self.l2.cpu_side
147
148 def connectMemSide(self, bus):
149 self._cluster_id
150 bus.slave
151 try:
152 self.l2.mem_side = bus.slave
153 except AttributeError:
154 for cpu in self.cpus:
155 cpu.connectAllPorts(bus)
156
157
158def addCaches(system, last_cache_level):
159 cluster_mem_bus = system.membus
160 assert last_cache_level >= 1 and last_cache_level <= 3
161 for cluster in system._clusters:
162 cluster.addL1()
163 if last_cache_level > 1:
164 for cluster in system._clusters:
165 cluster.addL2(cluster.clk_domain)
166 if last_cache_level > 2:
167 max_clock_cluster = max(system._clusters,
168 key=lambda c: c.clk_domain.clock[0])
169 system.l3 = devices.L3(clk_domain=max_clock_cluster.clk_domain)
170 system.toL3Bus = L2XBar(width=64)
171 system.toL3Bus.master = system.l3.cpu_side
172 system.l3.mem_side = system.membus.slave
173 cluster_mem_bus = system.toL3Bus
174
175 return cluster_mem_bus
176
177
178def main():
179 parser = argparse.ArgumentParser(
180 description="Generic ARM big.LITTLE configuration")
181
182 parser.add_argument("--restore-from", type=str, default=None,
183 help="Restore from checkpoint")
184 parser.add_argument("--dtb", type=str, default=default_dtb,
185 help="DTB file to load")

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205 help="Big CPU clock frequency")
206 parser.add_argument("--little-cpu-clock", type=str, default="1GHz",
207 help="Little CPU clock frequency")
208
209 m5.ticks.fixGlobalFrequency()
210
211 options = parser.parse_args()
212
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")

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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
213 if options.atomic:
214 cpu_config = { 'cpu' : AtomicSimpleCPU }
215 big_cpu_config, little_cpu_config = cpu_config, cpu_config
216 else:
217 big_cpu_config = { 'cpu' : CpuConfig.get("arm_detailed"),
218 'l1i' : devices.L1I,
219 'l1d' : devices.L1D,
220 'wcache' : devices.WalkCache,
221 'l2' : devices.L2 }
222 little_cpu_config = { 'cpu' : MinorCPU,
223 'l1i' : devices.L1I,
224 'l1d' : devices.L1D,
225 'wcache' : devices.WalkCache,
226 'l2' : devices.L2 }
227
228 big_cpu_class = big_cpu_config['cpu']
229 little_cpu_class = little_cpu_config['cpu']
230
231 kernel_cmd = [
232 "earlyprintk=pl011,0x1c090000",
233 "console=ttyAMA0",
234 "lpj=19988480",
235 "norandmaps",
236 "loglevel=8",
237 "mem=%s" % default_mem_size,
238 "root=/dev/vda1",
239 "rw",
240 "init=%s" % options.kernel_init,
241 "vmalloc=768MB",
242 ]
243
244 root = Root(full_system=True)
245
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
246 assert big_cpu_class.memory_mode() == little_cpu_class.memory_mode()
247 disks = default_disk if len(options.disk) == 0 else options.disk
161 disks = default_disk if len(options.disk) == 0 else options.disk
248 system = createSystem(options.kernel, big_cpu_class.memory_mode(),
249 options.bootscript, disks=disks)
162 system = createSystem(options.kernel, options.bootscript, disks=disks)
250
251 root.system = system
252 system.boot_osflags = " ".join(kernel_cmd)
253
163
164 root.system = system
165 system.boot_osflags = " ".join(kernel_cmd)
166
254 # big cluster
255 if options.big_cpus > 0:
256 system.bigCluster = CpuCluster()
257 system.bigCluster.addCPUs(big_cpu_config, options.big_cpus,
258 options.big_cpu_clock)
167 AtomicCluster = devices.AtomicCluster
259
168
169 if options.big_cpus + options.little_cpus == 0:
170 m5.util.panic("Empty CPU clusters")
260
171
261 # LITTLE cluster
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
262 if options.little_cpus > 0:
182 if options.little_cpus > 0:
263 system.littleCluster = CpuCluster()
264 system.littleCluster.addCPUs(little_cpu_config, options.little_cpus,
265 options.little_cpu_clock)
183 if options.atomic:
184 system.littleCluster = AtomicCluster(system, options.little_cpus,
185 options.little_cpu_clock)
266
186
267 # add caches
268 if options.caches:
269 cluster_mem_bus = addCaches(system, options.last_cache_level)
270 else:
271 if big_cpu_class.require_caches():
272 m5.util.panic("CPU model %s requires caches" % str(big_cpu_class))
273 if little_cpu_class.require_caches():
274 m5.util.panic("CPU model %s requires caches" %
275 str(little_cpu_class))
276 cluster_mem_bus = system.membus
187 else:
188 system.littleCluster = LittleCluster(system, options.little_cpus,
189 options.little_cpu_clock)
190 mem_mode = system.littleCluster.memoryMode()
277
191
278 # connect each cluster to the memory hierarchy
279 for cluster in system._clusters:
280 cluster.connectMemSide(cluster_mem_bus)
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
281
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
282 # Linux device tree
283 system.dtb_filename = SysPaths.binary(options.dtb)
284
285 # Get and load from the chkpt or simpoint checkpoint
286 if options.restore_from is not None:
287 m5.instantiate(options.restore_from)
288 else:
289 m5.instantiate()

--- 19 unchanged lines hidden --- 		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()

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