# Copyright (c) 2005-2007 The Regents of The University of Michigan # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer; # redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution; # neither the name of the copyright holders nor the names of its # contributors may be used to endorse or promote products derived from # this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # # Authors: Kevin Lim from m5.defines import buildEnv from m5.params import * from m5.proxy import * from BaseCPU import BaseCPU from FUPool import * from O3Checker import O3Checker from BranchPredictor import BranchPredictor class DerivO3CPU(BaseCPU): type = 'DerivO3CPU' cxx_header = 'cpu/o3/deriv.hh' @classmethod def memory_mode(cls): return 'timing' @classmethod def require_caches(cls): return True @classmethod def support_take_over(cls): return True activity = Param.Unsigned(0, "Initial count") cachePorts = Param.Unsigned(200, "Cache Ports") decodeToFetchDelay = Param.Cycles(1, "Decode to fetch delay") renameToFetchDelay = Param.Cycles(1 ,"Rename to fetch delay") iewToFetchDelay = Param.Cycles(1, "Issue/Execute/Writeback to fetch " "delay") commitToFetchDelay = Param.Cycles(1, "Commit to fetch delay") fetchWidth = Param.Unsigned(8, "Fetch width") fetchBufferSize = Param.Unsigned(64, "Fetch buffer size in bytes") renameToDecodeDelay = Param.Cycles(1, "Rename to decode delay") iewToDecodeDelay = Param.Cycles(1, "Issue/Execute/Writeback to decode " "delay") commitToDecodeDelay = Param.Cycles(1, "Commit to decode delay") fetchToDecodeDelay = Param.Cycles(1, "Fetch to decode delay") decodeWidth = Param.Unsigned(8, "Decode width") iewToRenameDelay = Param.Cycles(1, "Issue/Execute/Writeback to rename " "delay") commitToRenameDelay = Param.Cycles(1, "Commit to rename delay") decodeToRenameDelay = Param.Cycles(1, "Decode to rename delay") renameWidth = Param.Unsigned(8, "Rename width") commitToIEWDelay = Param.Cycles(1, "Commit to " "Issue/Execute/Writeback delay") renameToIEWDelay = Param.Cycles(2, "Rename to " "Issue/Execute/Writeback delay") issueToExecuteDelay = Param.Cycles(1, "Issue to execute delay (internal " "to the IEW stage)") dispatchWidth = Param.Unsigned(8, "Dispatch width") issueWidth = Param.Unsigned(8, "Issue width") wbWidth = Param.Unsigned(8, "Writeback width") fuPool = Param.FUPool(DefaultFUPool(), "Functional Unit pool") iewToCommitDelay = Param.Cycles(1, "Issue/Execute/Writeback to commit " "delay") renameToROBDelay = Param.Cycles(1, "Rename to reorder buffer delay") commitWidth = Param.Unsigned(8, "Commit width") squashWidth = Param.Unsigned(8, "Squash width") trapLatency = Param.Cycles(13, "Trap latency") fetchTrapLatency = Param.Cycles(1, "Fetch trap latency") backComSize = Param.Unsigned(5, "Time buffer size for backwards communication") forwardComSize = Param.Unsigned(5, "Time buffer size for forward communication") LQEntries = Param.Unsigned(32, "Number of load queue entries") SQEntries = Param.Unsigned(32, "Number of store queue entries") LSQDepCheckShift = Param.Unsigned(4, "Number of places to shift addr before check") LSQCheckLoads = Param.Bool(True, "Should dependency violations be checked for loads & stores or just stores") store_set_clear_period = Param.Unsigned(250000, "Number of load/store insts before the dep predictor should be invalidated") LFSTSize = Param.Unsigned(1024, "Last fetched store table size") SSITSize = Param.Unsigned(1024, "Store set ID table size") numRobs = Param.Unsigned(1, "Number of Reorder Buffers"); numPhysIntRegs = Param.Unsigned(256, "Number of physical integer registers") numPhysFloatRegs = Param.Unsigned(256, "Number of physical floating point " "registers") # most ISAs don't use condition-code regs, so default is 0 _defaultNumPhysCCRegs = 0 if buildEnv['TARGET_ISA'] == 'x86': # For x86, each CC reg is used to hold only a subset of the # flags, so we need 4-5 times the number of CC regs as # physical integer regs to be sure we don't run out. In # typical real machines, CC regs are not explicitly renamed # (it's a side effect of int reg renaming), so they should # never be the bottleneck here. _defaultNumPhysCCRegs = Self.numPhysIntRegs * 5 numPhysCCRegs = Param.Unsigned(_defaultNumPhysCCRegs, "Number of physical cc registers") numIQEntries = Param.Unsigned(64, "Number of instruction queue entries") numROBEntries = Param.Unsigned(192, "Number of reorder buffer entries") smtNumFetchingThreads = Param.Unsigned(1, "SMT Number of Fetching Threads") smtFetchPolicy = Param.String('SingleThread', "SMT Fetch policy") smtLSQPolicy = Param.String('Partitioned', "SMT LSQ Sharing Policy") smtLSQThreshold = Param.Int(100, "SMT LSQ Threshold Sharing Parameter") smtIQPolicy = Param.String('Partitioned', "SMT IQ Sharing Policy") smtIQThreshold = Param.Int(100, "SMT IQ Threshold Sharing Parameter") smtROBPolicy = Param.String('Partitioned', "SMT ROB Sharing Policy") smtROBThreshold = Param.Int(100, "SMT ROB Threshold Sharing Parameter") smtCommitPolicy = Param.String('RoundRobin', "SMT Commit Policy") branchPred = Param.BranchPredictor(BranchPredictor(numThreads = Parent.numThreads), "Branch Predictor") needsTSO = Param.Bool(buildEnv['TARGET_ISA'] == 'x86', "Enable TSO Memory model") def addCheckerCpu(self): if buildEnv['TARGET_ISA'] in ['arm']: from ArmTLB import ArmTLB self.checker = O3Checker(workload=self.workload, exitOnError=False, updateOnError=True, warnOnlyOnLoadError=True) self.checker.itb = ArmTLB(size = self.itb.size) self.checker.dtb = ArmTLB(size = self.dtb.size) self.checker.cpu_id = self.cpu_id else: print "ERROR: Checker only supported under ARM ISA!" exit(1)