BaseCPU.py revision 11988
1# Copyright (c) 2012-2013, 2015 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 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Copyright (c) 2005-2008 The Regents of The University of Michigan 14# Copyright (c) 2011 Regents of the University of California 15# All rights reserved. 16# 17# Redistribution and use in source and binary forms, with or without 18# modification, are permitted provided that the following conditions are 19# met: redistributions of source code must retain the above copyright 20# notice, this list of conditions and the following disclaimer; 21# redistributions in binary form must reproduce the above copyright 22# notice, this list of conditions and the following disclaimer in the 23# documentation and/or other materials provided with the distribution; 24# neither the name of the copyright holders nor the names of its 25# contributors may be used to endorse or promote products derived from 26# this software without specific prior written permission. 27# 28# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39# 40# Authors: Nathan Binkert 41# Rick Strong 42# Andreas Hansson 43 44import sys 45 46from m5.SimObject import * 47from m5.defines import buildEnv 48from m5.params import * 49from m5.proxy import * 50 51from XBar import L2XBar 52from InstTracer import InstTracer 53from CPUTracers import ExeTracer 54from MemObject import MemObject 55from ClockDomain import * 56 57default_tracer = ExeTracer() 58 59if buildEnv['TARGET_ISA'] == 'alpha': 60 from AlphaTLB import AlphaDTB, AlphaITB 61 from AlphaInterrupts import AlphaInterrupts 62 from AlphaISA import AlphaISA 63 isa_class = AlphaISA 64elif buildEnv['TARGET_ISA'] == 'sparc': 65 from SparcTLB import SparcTLB 66 from SparcInterrupts import SparcInterrupts 67 from SparcISA import SparcISA 68 isa_class = SparcISA 69elif buildEnv['TARGET_ISA'] == 'x86': 70 from X86TLB import X86TLB 71 from X86LocalApic import X86LocalApic 72 from X86ISA import X86ISA 73 isa_class = X86ISA 74elif buildEnv['TARGET_ISA'] == 'mips': 75 from MipsTLB import MipsTLB 76 from MipsInterrupts import MipsInterrupts 77 from MipsISA import MipsISA 78 isa_class = MipsISA 79elif buildEnv['TARGET_ISA'] == 'arm': 80 from ArmTLB import ArmTLB, ArmStage2IMMU, ArmStage2DMMU 81 from ArmInterrupts import ArmInterrupts 82 from ArmISA import ArmISA 83 isa_class = ArmISA 84elif buildEnv['TARGET_ISA'] == 'power': 85 from PowerTLB import PowerTLB 86 from PowerInterrupts import PowerInterrupts 87 from PowerISA import PowerISA 88 isa_class = PowerISA 89elif buildEnv['TARGET_ISA'] == 'riscv': 90 from RiscvTLB import RiscvTLB 91 from RiscvInterrupts import RiscvInterrupts 92 from RiscvISA import RiscvISA 93 isa_class = RiscvISA 94 95class BaseCPU(MemObject): 96 type = 'BaseCPU' 97 abstract = True 98 cxx_header = "cpu/base.hh" 99 100 cxx_exports = [ 101 PyBindMethod("switchOut"), 102 PyBindMethod("takeOverFrom"), 103 PyBindMethod("switchedOut"), 104 PyBindMethod("flushTLBs"), 105 PyBindMethod("totalInsts"), 106 PyBindMethod("scheduleInstStop"), 107 PyBindMethod("scheduleLoadStop"), 108 PyBindMethod("getCurrentInstCount"), 109 ] 110 111 @classmethod 112 def memory_mode(cls): 113 """Which memory mode does this CPU require?""" 114 return 'invalid' 115 116 @classmethod 117 def require_caches(cls): 118 """Does the CPU model require caches? 119 120 Some CPU models might make assumptions that require them to 121 have caches. 122 """ 123 return False 124 125 @classmethod 126 def support_take_over(cls): 127 """Does the CPU model support CPU takeOverFrom?""" 128 return False 129 130 def takeOverFrom(self, old_cpu): 131 self._ccObject.takeOverFrom(old_cpu._ccObject) 132 133 134 system = Param.System(Parent.any, "system object") 135 cpu_id = Param.Int(-1, "CPU identifier") 136 socket_id = Param.Unsigned(0, "Physical Socket identifier") 137 numThreads = Param.Unsigned(1, "number of HW thread contexts") 138 139 function_trace = Param.Bool(False, "Enable function trace") 140 function_trace_start = Param.Tick(0, "Tick to start function trace") 141 142 checker = Param.BaseCPU(NULL, "checker CPU") 143 144 syscallRetryLatency = Param.Cycles(10000, "Cycles to wait until retry") 145 146 do_checkpoint_insts = Param.Bool(True, 147 "enable checkpoint pseudo instructions") 148 do_statistics_insts = Param.Bool(True, 149 "enable statistics pseudo instructions") 150 151 profile = Param.Latency('0ns', "trace the kernel stack") 152 do_quiesce = Param.Bool(True, "enable quiesce instructions") 153 154 workload = VectorParam.Process([], "processes to run") 155 156 if buildEnv['TARGET_ISA'] == 'sparc': 157 dtb = Param.SparcTLB(SparcTLB(), "Data TLB") 158 itb = Param.SparcTLB(SparcTLB(), "Instruction TLB") 159 interrupts = VectorParam.SparcInterrupts( 160 [], "Interrupt Controller") 161 isa = VectorParam.SparcISA([ isa_class() ], "ISA instance") 162 elif buildEnv['TARGET_ISA'] == 'alpha': 163 dtb = Param.AlphaTLB(AlphaDTB(), "Data TLB") 164 itb = Param.AlphaTLB(AlphaITB(), "Instruction TLB") 165 interrupts = VectorParam.AlphaInterrupts( 166 [], "Interrupt Controller") 167 isa = VectorParam.AlphaISA([ isa_class() ], "ISA instance") 168 elif buildEnv['TARGET_ISA'] == 'x86': 169 dtb = Param.X86TLB(X86TLB(), "Data TLB") 170 itb = Param.X86TLB(X86TLB(), "Instruction TLB") 171 interrupts = VectorParam.X86LocalApic([], "Interrupt Controller") 172 isa = VectorParam.X86ISA([ isa_class() ], "ISA instance") 173 elif buildEnv['TARGET_ISA'] == 'mips': 174 dtb = Param.MipsTLB(MipsTLB(), "Data TLB") 175 itb = Param.MipsTLB(MipsTLB(), "Instruction TLB") 176 interrupts = VectorParam.MipsInterrupts( 177 [], "Interrupt Controller") 178 isa = VectorParam.MipsISA([ isa_class() ], "ISA instance") 179 elif buildEnv['TARGET_ISA'] == 'arm': 180 dtb = Param.ArmTLB(ArmTLB(), "Data TLB") 181 itb = Param.ArmTLB(ArmTLB(), "Instruction TLB") 182 istage2_mmu = Param.ArmStage2MMU(ArmStage2IMMU(), "Stage 2 trans") 183 dstage2_mmu = Param.ArmStage2MMU(ArmStage2DMMU(), "Stage 2 trans") 184 interrupts = VectorParam.ArmInterrupts( 185 [], "Interrupt Controller") 186 isa = VectorParam.ArmISA([ isa_class() ], "ISA instance") 187 elif buildEnv['TARGET_ISA'] == 'power': 188 UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?") 189 dtb = Param.PowerTLB(PowerTLB(), "Data TLB") 190 itb = Param.PowerTLB(PowerTLB(), "Instruction TLB") 191 interrupts = VectorParam.PowerInterrupts( 192 [], "Interrupt Controller") 193 isa = VectorParam.PowerISA([ isa_class() ], "ISA instance") 194 elif buildEnv['TARGET_ISA'] == 'riscv': 195 dtb = Param.RiscvTLB(RiscvTLB(), "Data TLB") 196 itb = Param.RiscvTLB(RiscvTLB(), "Instruction TLB") 197 interrupts = VectorParam.RiscvInterrupts( 198 [], "Interrupt Controller") 199 isa = VectorParam.RiscvISA([ isa_class() ], "ISA instance") 200 else: 201 print "Don't know what TLB to use for ISA %s" % \ 202 buildEnv['TARGET_ISA'] 203 sys.exit(1) 204 205 max_insts_all_threads = Param.Counter(0, 206 "terminate when all threads have reached this inst count") 207 max_insts_any_thread = Param.Counter(0, 208 "terminate when any thread reaches this inst count") 209 simpoint_start_insts = VectorParam.Counter([], 210 "starting instruction counts of simpoints") 211 max_loads_all_threads = Param.Counter(0, 212 "terminate when all threads have reached this load count") 213 max_loads_any_thread = Param.Counter(0, 214 "terminate when any thread reaches this load count") 215 progress_interval = Param.Frequency('0Hz', 216 "frequency to print out the progress message") 217 218 switched_out = Param.Bool(False, 219 "Leave the CPU switched out after startup (used when switching " \ 220 "between CPU models)") 221 222 tracer = Param.InstTracer(default_tracer, "Instruction tracer") 223 224 icache_port = MasterPort("Instruction Port") 225 dcache_port = MasterPort("Data Port") 226 _cached_ports = ['icache_port', 'dcache_port'] 227 228 if buildEnv['TARGET_ISA'] in ['x86', 'arm']: 229 _cached_ports += ["itb.walker.port", "dtb.walker.port"] 230 231 _uncached_slave_ports = [] 232 _uncached_master_ports = [] 233 if buildEnv['TARGET_ISA'] == 'x86': 234 _uncached_slave_ports += ["interrupts[0].pio", 235 "interrupts[0].int_slave"] 236 _uncached_master_ports += ["interrupts[0].int_master"] 237 238 def createInterruptController(self): 239 if buildEnv['TARGET_ISA'] == 'sparc': 240 self.interrupts = [SparcInterrupts() for i in xrange(self.numThreads)] 241 elif buildEnv['TARGET_ISA'] == 'alpha': 242 self.interrupts = [AlphaInterrupts() for i in xrange(self.numThreads)] 243 elif buildEnv['TARGET_ISA'] == 'x86': 244 self.apic_clk_domain = DerivedClockDomain(clk_domain = 245 Parent.clk_domain, 246 clk_divider = 16) 247 self.interrupts = [X86LocalApic(clk_domain = self.apic_clk_domain, 248 pio_addr=0x2000000000000000) 249 for i in xrange(self.numThreads)] 250 _localApic = self.interrupts 251 elif buildEnv['TARGET_ISA'] == 'mips': 252 self.interrupts = [MipsInterrupts() for i in xrange(self.numThreads)] 253 elif buildEnv['TARGET_ISA'] == 'arm': 254 self.interrupts = [ArmInterrupts() for i in xrange(self.numThreads)] 255 elif buildEnv['TARGET_ISA'] == 'power': 256 self.interrupts = [PowerInterrupts() for i in xrange(self.numThreads)] 257 elif buildEnv['TARGET_ISA'] == 'riscv': 258 self.interrupts = \ 259 [RiscvInterrupts() for i in xrange(self.numThreads)] 260 else: 261 print "Don't know what Interrupt Controller to use for ISA %s" % \ 262 buildEnv['TARGET_ISA'] 263 sys.exit(1) 264 265 def connectCachedPorts(self, bus): 266 for p in self._cached_ports: 267 exec('self.%s = bus.slave' % p) 268 269 def connectUncachedPorts(self, bus): 270 for p in self._uncached_slave_ports: 271 exec('self.%s = bus.master' % p) 272 for p in self._uncached_master_ports: 273 exec('self.%s = bus.slave' % p) 274 275 def connectAllPorts(self, cached_bus, uncached_bus = None): 276 self.connectCachedPorts(cached_bus) 277 if not uncached_bus: 278 uncached_bus = cached_bus 279 self.connectUncachedPorts(uncached_bus) 280 281 def addPrivateSplitL1Caches(self, ic, dc, iwc = None, dwc = None): 282 self.icache = ic 283 self.dcache = dc 284 self.icache_port = ic.cpu_side 285 self.dcache_port = dc.cpu_side 286 self._cached_ports = ['icache.mem_side', 'dcache.mem_side'] 287 if buildEnv['TARGET_ISA'] in ['x86', 'arm']: 288 if iwc and dwc: 289 self.itb_walker_cache = iwc 290 self.dtb_walker_cache = dwc 291 self.itb.walker.port = iwc.cpu_side 292 self.dtb.walker.port = dwc.cpu_side 293 self._cached_ports += ["itb_walker_cache.mem_side", \ 294 "dtb_walker_cache.mem_side"] 295 else: 296 self._cached_ports += ["itb.walker.port", "dtb.walker.port"] 297 298 # Checker doesn't need its own tlb caches because it does 299 # functional accesses only 300 if self.checker != NULL: 301 self._cached_ports += ["checker.itb.walker.port", \ 302 "checker.dtb.walker.port"] 303 304 def addTwoLevelCacheHierarchy(self, ic, dc, l2c, iwc = None, dwc = None): 305 self.addPrivateSplitL1Caches(ic, dc, iwc, dwc) 306 self.toL2Bus = L2XBar() 307 self.connectCachedPorts(self.toL2Bus) 308 self.l2cache = l2c 309 self.toL2Bus.master = self.l2cache.cpu_side 310 self._cached_ports = ['l2cache.mem_side'] 311 312 def createThreads(self): 313 self.isa = [ isa_class() for i in xrange(self.numThreads) ] 314 if self.checker != NULL: 315 self.checker.createThreads() 316 317 def addCheckerCpu(self): 318 pass 319