O3CPU.py revision 10338
1# Copyright (c) 2005-2007 The Regents of The University of Michigan 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer; 8# redistributions in binary form must reproduce the above copyright 9# notice, this list of conditions and the following disclaimer in the 10# documentation and/or other materials provided with the distribution; 11# neither the name of the copyright holders nor the names of its 12# contributors may be used to endorse or promote products derived from 13# this software without specific prior written permission. 14# 15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26# 27# Authors: Kevin Lim 28 29from m5.defines import buildEnv 30from m5.params import * 31from m5.proxy import * 32from BaseCPU import BaseCPU 33from FUPool import * 34from O3Checker import O3Checker 35from BranchPredictor import BranchPredictor 36 37class DerivO3CPU(BaseCPU): 38 type = 'DerivO3CPU' 39 cxx_header = 'cpu/o3/deriv.hh' 40 41 @classmethod 42 def memory_mode(cls): 43 return 'timing' 44 45 @classmethod 46 def require_caches(cls): 47 return True 48 49 @classmethod 50 def support_take_over(cls): 51 return True 52 53 activity = Param.Unsigned(0, "Initial count") 54 55 cachePorts = Param.Unsigned(200, "Cache Ports") 56 57 decodeToFetchDelay = Param.Cycles(1, "Decode to fetch delay") 58 renameToFetchDelay = Param.Cycles(1 ,"Rename to fetch delay") 59 iewToFetchDelay = Param.Cycles(1, "Issue/Execute/Writeback to fetch " 60 "delay") 61 commitToFetchDelay = Param.Cycles(1, "Commit to fetch delay") 62 fetchWidth = Param.Unsigned(8, "Fetch width") 63 fetchBufferSize = Param.Unsigned(64, "Fetch buffer size in bytes") 64 fetchQueueSize = Param.Unsigned(32, "Fetch queue size in micro-ops " 65 "per-thread") 66 67 renameToDecodeDelay = Param.Cycles(1, "Rename to decode delay") 68 iewToDecodeDelay = Param.Cycles(1, "Issue/Execute/Writeback to decode " 69 "delay") 70 commitToDecodeDelay = Param.Cycles(1, "Commit to decode delay") 71 fetchToDecodeDelay = Param.Cycles(1, "Fetch to decode delay") 72 decodeWidth = Param.Unsigned(8, "Decode width") 73 74 iewToRenameDelay = Param.Cycles(1, "Issue/Execute/Writeback to rename " 75 "delay") 76 commitToRenameDelay = Param.Cycles(1, "Commit to rename delay") 77 decodeToRenameDelay = Param.Cycles(1, "Decode to rename delay") 78 renameWidth = Param.Unsigned(8, "Rename width") 79 80 commitToIEWDelay = Param.Cycles(1, "Commit to " 81 "Issue/Execute/Writeback delay") 82 renameToIEWDelay = Param.Cycles(2, "Rename to " 83 "Issue/Execute/Writeback delay") 84 issueToExecuteDelay = Param.Cycles(1, "Issue to execute delay (internal " 85 "to the IEW stage)") 86 dispatchWidth = Param.Unsigned(8, "Dispatch width") 87 issueWidth = Param.Unsigned(8, "Issue width") 88 wbWidth = Param.Unsigned(8, "Writeback width") 89 fuPool = Param.FUPool(DefaultFUPool(), "Functional Unit pool") 90 91 iewToCommitDelay = Param.Cycles(1, "Issue/Execute/Writeback to commit " 92 "delay") 93 renameToROBDelay = Param.Cycles(1, "Rename to reorder buffer delay") 94 commitWidth = Param.Unsigned(8, "Commit width") 95 squashWidth = Param.Unsigned(8, "Squash width") 96 trapLatency = Param.Cycles(13, "Trap latency") 97 fetchTrapLatency = Param.Cycles(1, "Fetch trap latency") 98 99 backComSize = Param.Unsigned(5, "Time buffer size for backwards communication") 100 forwardComSize = Param.Unsigned(5, "Time buffer size for forward communication") 101 102 LQEntries = Param.Unsigned(32, "Number of load queue entries") 103 SQEntries = Param.Unsigned(32, "Number of store queue entries") 104 LSQDepCheckShift = Param.Unsigned(4, "Number of places to shift addr before check") 105 LSQCheckLoads = Param.Bool(True, 106 "Should dependency violations be checked for loads & stores or just stores") 107 store_set_clear_period = Param.Unsigned(250000, 108 "Number of load/store insts before the dep predictor should be invalidated") 109 LFSTSize = Param.Unsigned(1024, "Last fetched store table size") 110 SSITSize = Param.Unsigned(1024, "Store set ID table size") 111 112 numRobs = Param.Unsigned(1, "Number of Reorder Buffers"); 113 114 numPhysIntRegs = Param.Unsigned(256, "Number of physical integer registers") 115 numPhysFloatRegs = Param.Unsigned(256, "Number of physical floating point " 116 "registers") 117 # most ISAs don't use condition-code regs, so default is 0 118 _defaultNumPhysCCRegs = 0 119 if buildEnv['TARGET_ISA'] in ('arm','x86'): 120 # For x86, each CC reg is used to hold only a subset of the 121 # flags, so we need 4-5 times the number of CC regs as 122 # physical integer regs to be sure we don't run out. In 123 # typical real machines, CC regs are not explicitly renamed 124 # (it's a side effect of int reg renaming), so they should 125 # never be the bottleneck here. 126 _defaultNumPhysCCRegs = Self.numPhysIntRegs * 5 127 numPhysCCRegs = Param.Unsigned(_defaultNumPhysCCRegs, 128 "Number of physical cc registers") 129 numIQEntries = Param.Unsigned(64, "Number of instruction queue entries") 130 numROBEntries = Param.Unsigned(192, "Number of reorder buffer entries") 131 132 smtNumFetchingThreads = Param.Unsigned(1, "SMT Number of Fetching Threads") 133 smtFetchPolicy = Param.String('SingleThread', "SMT Fetch policy") 134 smtLSQPolicy = Param.String('Partitioned', "SMT LSQ Sharing Policy") 135 smtLSQThreshold = Param.Int(100, "SMT LSQ Threshold Sharing Parameter") 136 smtIQPolicy = Param.String('Partitioned', "SMT IQ Sharing Policy") 137 smtIQThreshold = Param.Int(100, "SMT IQ Threshold Sharing Parameter") 138 smtROBPolicy = Param.String('Partitioned', "SMT ROB Sharing Policy") 139 smtROBThreshold = Param.Int(100, "SMT ROB Threshold Sharing Parameter") 140 smtCommitPolicy = Param.String('RoundRobin', "SMT Commit Policy") 141 142 branchPred = Param.BranchPredictor(BranchPredictor(numThreads = 143 Parent.numThreads), 144 "Branch Predictor") 145 needsTSO = Param.Bool(buildEnv['TARGET_ISA'] == 'x86', 146 "Enable TSO Memory model") 147 148 def addCheckerCpu(self): 149 if buildEnv['TARGET_ISA'] in ['arm']: 150 from ArmTLB import ArmTLB 151 152 self.checker = O3Checker(workload=self.workload, 153 exitOnError=False, 154 updateOnError=True, 155 warnOnlyOnLoadError=True) 156 self.checker.itb = ArmTLB(size = self.itb.size) 157 self.checker.dtb = ArmTLB(size = self.dtb.size) 158 self.checker.cpu_id = self.cpu_id 159 160 else: 161 print "ERROR: Checker only supported under ARM ISA!" 162 exit(1) 163