| # Copyright (c) 2016, 2019 ARM Limited |
| # All rights reserved. |
| # |
| # The license below extends only to copyright in the software and shall |
| # not be construed as granting a license to any other intellectual |
| # property including but not limited to intellectual property relating |
| # to a hardware implementation of the functionality of the software |
| # licensed hereunder. You may use the software subject to the license |
| # terms below provided that you ensure that this notice is replicated |
| # unmodified and in its entirety in all distributions of the software, |
| # modified or unmodified, in source code or in binary form. |
| # |
| # 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. |
| |
| from m5.defines import buildEnv |
| from m5.params import * |
| from m5.proxy import * |
| |
| from m5.objects.BaseCPU import BaseCPU |
| from m5.objects.FUPool import * |
| #from m5.objects.O3Checker import O3Checker |
| from m5.objects.BranchPredictor import * |
| |
| class SMTFetchPolicy(ScopedEnum): |
| vals = [ 'RoundRobin', 'Branch', 'IQCount', 'LSQCount' ] |
| |
| class SMTQueuePolicy(ScopedEnum): |
| vals = [ 'Dynamic', 'Partitioned', 'Threshold' ] |
| |
| class CommitPolicy(ScopedEnum): |
| vals = [ 'RoundRobin', 'OldestReady' ] |
| |
| class BaseO3CPU(BaseCPU): |
| type = 'BaseO3CPU' |
| cxx_class = 'gem5::o3::CPU' |
| cxx_header = 'cpu/o3/dyn_inst.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") |
| |
| cacheStorePorts = Param.Unsigned(200, "Cache Ports. " |
| "Constrains stores only.") |
| cacheLoadPorts = Param.Unsigned(200, "Cache Ports. " |
| "Constrains loads only.") |
| |
| 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") |
| fetchQueueSize = Param.Unsigned(32, "Fetch queue size in micro-ops " |
| "per-thread") |
| |
| 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") |
| numPhysVecRegs = Param.Unsigned(256, "Number of physical vector " |
| "registers") |
| numPhysVecPredRegs = Param.Unsigned(32, "Number of physical predicate " |
| "registers") |
| # most ISAs don't use condition-code regs, so default is 0 |
| numPhysCCRegs = Param.Unsigned(0, "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.SMTFetchPolicy('RoundRobin', "SMT Fetch policy") |
| smtLSQPolicy = Param.SMTQueuePolicy('Partitioned', |
| "SMT LSQ Sharing Policy") |
| smtLSQThreshold = Param.Int(100, "SMT LSQ Threshold Sharing Parameter") |
| smtIQPolicy = Param.SMTQueuePolicy('Partitioned', |
| "SMT IQ Sharing Policy") |
| smtIQThreshold = Param.Int(100, "SMT IQ Threshold Sharing Parameter") |
| smtROBPolicy = Param.SMTQueuePolicy('Partitioned', |
| "SMT ROB Sharing Policy") |
| smtROBThreshold = Param.Int(100, "SMT ROB Threshold Sharing Parameter") |
| smtCommitPolicy = Param.CommitPolicy('RoundRobin', "SMT Commit Policy") |
| |
| branchPred = Param.BranchPredictor(TournamentBP(numThreads = |
| Parent.numThreads), |
| "Branch Predictor") |
| needsTSO = Param.Bool(False, "Enable TSO Memory model") |
