# Copyright (c) 2005-2007 The Regents of The University of Michigan
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# 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
class DerivO3CPU(BaseCPU):
type = 'DerivO3CPU'
activity = Param.Unsigned(0, "Initial count")
cachePorts = Param.Unsigned(200, "Cache Ports")
decodeToFetchDelay = Param.Unsigned(1, "Decode to fetch delay")
renameToFetchDelay = Param.Unsigned(1 ,"Rename to fetch delay")
iewToFetchDelay = Param.Unsigned(1, "Issue/Execute/Writeback to fetch "
"delay")
commitToFetchDelay = Param.Unsigned(1, "Commit to fetch delay")
fetchWidth = Param.Unsigned(8, "Fetch width")
renameToDecodeDelay = Param.Unsigned(1, "Rename to decode delay")
iewToDecodeDelay = Param.Unsigned(1, "Issue/Execute/Writeback to decode "
"delay")
commitToDecodeDelay = Param.Unsigned(1, "Commit to decode delay")
fetchToDecodeDelay = Param.Unsigned(1, "Fetch to decode delay")
decodeWidth = Param.Unsigned(8, "Decode width")
iewToRenameDelay = Param.Unsigned(1, "Issue/Execute/Writeback to rename "
"delay")
commitToRenameDelay = Param.Unsigned(1, "Commit to rename delay")
decodeToRenameDelay = Param.Unsigned(1, "Decode to rename delay")
renameWidth = Param.Unsigned(8, "Rename width")
commitToIEWDelay = Param.Unsigned(1, "Commit to "
"Issue/Execute/Writeback delay")
renameToIEWDelay = Param.Unsigned(2, "Rename to "
"Issue/Execute/Writeback delay")
issueToExecuteDelay = Param.Unsigned(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")
wbDepth = Param.Unsigned(1, "Writeback depth")
fuPool = Param.FUPool(DefaultFUPool(), "Functional Unit pool")
iewToCommitDelay = Param.Unsigned(1, "Issue/Execute/Writeback to commit "
"delay")
renameToROBDelay = Param.Unsigned(1, "Rename to reorder buffer delay")
commitWidth = Param.Unsigned(8, "Commit width")
squashWidth = Param.Unsigned(8, "Squash width")
trapLatency = Param.Tick(13, "Trap latency")
fetchTrapLatency = Param.Tick(1, "Fetch trap latency")
backComSize = Param.Unsigned(5, "Time buffer size for backwards communication")
forwardComSize = Param.Unsigned(5, "Time buffer size for forward communication")
predType = Param.String("tournament", "Branch predictor type ('local', 'tournament')")
localPredictorSize = Param.Unsigned(2048, "Size of local predictor")
localCtrBits = Param.Unsigned(2, "Bits per counter")
localHistoryTableSize = Param.Unsigned(2048, "Size of local history table")
localHistoryBits = Param.Unsigned(11, "Bits for the local history")
globalPredictorSize = Param.Unsigned(8192, "Size of global predictor")
globalCtrBits = Param.Unsigned(2, "Bits per counter")
globalHistoryBits = Param.Unsigned(13, "Bits of history")
choicePredictorSize = Param.Unsigned(8192, "Size of choice predictor")
choiceCtrBits = Param.Unsigned(2, "Bits of choice counters")
BTBEntries = Param.Unsigned(4096, "Number of BTB entries")
BTBTagSize = Param.Unsigned(16, "Size of the BTB tags, in bits")
RASSize = Param.Unsigned(16, "RAS size")
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")
numIQEntries = Param.Unsigned(64, "Number of instruction queue entries")
numROBEntries = Param.Unsigned(192, "Number of reorder buffer entries")
instShiftAmt = Param.Unsigned(2, "Number of bits to shift instructions by")
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")
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)
else:
print "ERROR: Checker only supported under ARM ISA!"
exit(1)