| # Copyright (c) 2012-2014, 2017-2018 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) 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.SimObject import SimObject |
| from m5.objects.BaseCPU import BaseCPU |
| from m5.objects.DummyChecker import DummyChecker |
| from m5.objects.BranchPredictor import * |
| from m5.objects.TimingExpr import TimingExpr |
| |
| from m5.objects.FuncUnit import OpClass |
| |
| |
| class MinorOpClass(SimObject): |
| """Boxing of OpClass to get around build problems and provide a hook for |
| future additions to OpClass checks""" |
| |
| type = "MinorOpClass" |
| cxx_header = "cpu/minor/func_unit.hh" |
| cxx_class = "gem5::MinorOpClass" |
| |
| opClass = Param.OpClass("op class to match") |
| |
| |
| class MinorOpClassSet(SimObject): |
| """A set of matchable op classes""" |
| |
| type = "MinorOpClassSet" |
| cxx_header = "cpu/minor/func_unit.hh" |
| cxx_class = "gem5::MinorOpClassSet" |
| |
| opClasses = VectorParam.MinorOpClass( |
| [], "op classes to be matched." " An empty list means any class" |
| ) |
| |
| |
| class MinorFUTiming(SimObject): |
| type = "MinorFUTiming" |
| cxx_header = "cpu/minor/func_unit.hh" |
| cxx_class = "gem5::MinorFUTiming" |
| |
| mask = Param.UInt64(0, "mask for testing ExtMachInst") |
| match = Param.UInt64( |
| 0, |
| "match value for testing ExtMachInst:" |
| " (ext_mach_inst & mask) == match", |
| ) |
| suppress = Param.Bool( |
| False, "if true, this inst. is not executed by" " this FU" |
| ) |
| extraCommitLat = Param.Cycles( |
| 0, "extra cycles to stall commit for" " this inst." |
| ) |
| extraCommitLatExpr = Param.TimingExpr( |
| NULL, "extra cycles as a" " run-time evaluated expression" |
| ) |
| extraAssumedLat = Param.Cycles( |
| 0, |
| "extra cycles to add to scoreboard" |
| " retire time for this insts dest registers once it leaves the" |
| " functional unit. For mem refs, if this is 0, the result's time" |
| " is marked as unpredictable and no forwarding can take place.", |
| ) |
| srcRegsRelativeLats = VectorParam.Cycles( |
| "the maximum number of cycles" |
| " after inst. issue that each src reg can be available for this" |
| " inst. to issue" |
| ) |
| opClasses = Param.MinorOpClassSet( |
| MinorOpClassSet(), |
| "op classes to be considered for this decode. An empty set means any" |
| " class", |
| ) |
| description = Param.String( |
| "", "description string of the decoding/inst." " class" |
| ) |
| |
| |
| def minorMakeOpClassSet(op_classes): |
| """Make a MinorOpClassSet from a list of OpClass enum value strings""" |
| |
| def boxOpClass(op_class): |
| return MinorOpClass(opClass=op_class) |
| |
| return MinorOpClassSet(opClasses=[boxOpClass(o) for o in op_classes]) |
| |
| |
| class MinorFU(SimObject): |
| type = "MinorFU" |
| cxx_header = "cpu/minor/func_unit.hh" |
| cxx_class = "gem5::MinorFU" |
| |
| opClasses = Param.MinorOpClassSet( |
| MinorOpClassSet(), |
| "type of operations" " allowed on this functional unit", |
| ) |
| opLat = Param.Cycles(1, "latency in cycles") |
| issueLat = Param.Cycles( |
| 1, "cycles until another instruction can be" " issued" |
| ) |
| timings = VectorParam.MinorFUTiming([], "extra decoding rules") |
| |
| cantForwardFromFUIndices = VectorParam.Unsigned( |
| [], |
| "list of FU indices from which this FU can't receive and early" |
| " (forwarded) result", |
| ) |
| |
| |
| class MinorFUPool(SimObject): |
| type = "MinorFUPool" |
| cxx_header = "cpu/minor/func_unit.hh" |
| cxx_class = "gem5::MinorFUPool" |
| |
| funcUnits = VectorParam.MinorFU("functional units") |
| |
| |
| class MinorDefaultIntFU(MinorFU): |
| opClasses = minorMakeOpClassSet(["IntAlu"]) |
| timings = [MinorFUTiming(description="Int", srcRegsRelativeLats=[2])] |
| opLat = 3 |
| |
| |
| class MinorDefaultIntMulFU(MinorFU): |
| opClasses = minorMakeOpClassSet(["IntMult"]) |
| timings = [MinorFUTiming(description="Mul", srcRegsRelativeLats=[0])] |
| opLat = 3 |
| |
| |
| class MinorDefaultIntDivFU(MinorFU): |
| opClasses = minorMakeOpClassSet(["IntDiv"]) |
| issueLat = 9 |
| opLat = 9 |
| |
| |
| class MinorDefaultFloatSimdFU(MinorFU): |
| opClasses = minorMakeOpClassSet( |
| [ |
| "FloatAdd", |
| "FloatCmp", |
| "FloatCvt", |
| "FloatMisc", |
| "FloatMult", |
| "FloatMultAcc", |
| "FloatDiv", |
| "FloatSqrt", |
| "SimdAdd", |
| "SimdAddAcc", |
| "SimdAlu", |
| "SimdCmp", |
| "SimdCvt", |
| "SimdMisc", |
| "SimdMult", |
| "SimdMultAcc", |
| "SimdShift", |
| "SimdShiftAcc", |
| "SimdDiv", |
| "SimdSqrt", |
| "SimdFloatAdd", |
| "SimdFloatAlu", |
| "SimdFloatCmp", |
| "SimdFloatCvt", |
| "SimdFloatDiv", |
| "SimdFloatMisc", |
| "SimdFloatMult", |
| "SimdFloatMultAcc", |
| "SimdFloatSqrt", |
| "SimdReduceAdd", |
| "SimdReduceAlu", |
| "SimdReduceCmp", |
| "SimdFloatReduceAdd", |
| "SimdFloatReduceCmp", |
| "SimdAes", |
| "SimdAesMix", |
| "SimdSha1Hash", |
| "SimdSha1Hash2", |
| "SimdSha256Hash", |
| "SimdSha256Hash2", |
| "SimdShaSigma2", |
| "SimdShaSigma3", |
| ] |
| ) |
| |
| timings = [MinorFUTiming(description="FloatSimd", srcRegsRelativeLats=[2])] |
| opLat = 6 |
| |
| |
| class MinorDefaultPredFU(MinorFU): |
| opClasses = minorMakeOpClassSet(["SimdPredAlu"]) |
| timings = [MinorFUTiming(description="Pred", srcRegsRelativeLats=[2])] |
| opLat = 3 |
| |
| |
| class MinorDefaultMemFU(MinorFU): |
| opClasses = minorMakeOpClassSet( |
| ["MemRead", "MemWrite", "FloatMemRead", "FloatMemWrite"] |
| ) |
| timings = [ |
| MinorFUTiming( |
| description="Mem", srcRegsRelativeLats=[1], extraAssumedLat=2 |
| ) |
| ] |
| opLat = 1 |
| |
| |
| class MinorDefaultMiscFU(MinorFU): |
| opClasses = minorMakeOpClassSet(["IprAccess", "InstPrefetch"]) |
| opLat = 1 |
| |
| |
| class MinorDefaultFUPool(MinorFUPool): |
| funcUnits = [ |
| MinorDefaultIntFU(), |
| MinorDefaultIntFU(), |
| MinorDefaultIntMulFU(), |
| MinorDefaultIntDivFU(), |
| MinorDefaultFloatSimdFU(), |
| MinorDefaultPredFU(), |
| MinorDefaultMemFU(), |
| MinorDefaultMiscFU(), |
| ] |
| |
| |
| class ThreadPolicy(Enum): |
| vals = ["SingleThreaded", "RoundRobin", "Random"] |
| |
| |
| class BaseMinorCPU(BaseCPU): |
| type = "BaseMinorCPU" |
| cxx_header = "cpu/minor/cpu.hh" |
| cxx_class = "gem5::MinorCPU" |
| |
| @classmethod |
| def memory_mode(cls): |
| return "timing" |
| |
| @classmethod |
| def require_caches(cls): |
| return True |
| |
| @classmethod |
| def support_take_over(cls): |
| return True |
| |
| threadPolicy = Param.ThreadPolicy("RoundRobin", "Thread scheduling policy") |
| fetch1FetchLimit = Param.Unsigned( |
| 1, "Number of line fetches allowable in flight at once" |
| ) |
| fetch1LineSnapWidth = Param.Unsigned( |
| 0, |
| "Fetch1 'line' fetch snap size in bytes" |
| " (0 means use system cache line size)", |
| ) |
| fetch1LineWidth = Param.Unsigned( |
| 0, |
| "Fetch1 maximum fetch size in bytes (0 means use system cache" |
| " line size)", |
| ) |
| fetch1ToFetch2ForwardDelay = Param.Cycles( |
| 1, "Forward cycle delay from Fetch1 to Fetch2 (1 means next cycle)" |
| ) |
| fetch1ToFetch2BackwardDelay = Param.Cycles( |
| 1, |
| "Backward cycle delay from Fetch2 to Fetch1 for branch prediction" |
| " signalling (0 means in the same cycle, 1 mean the next cycle)", |
| ) |
| |
| fetch2InputBufferSize = Param.Unsigned( |
| 2, "Size of input buffer to Fetch2 in cycles-worth of insts." |
| ) |
| fetch2ToDecodeForwardDelay = Param.Cycles( |
| 1, "Forward cycle delay from Fetch2 to Decode (1 means next cycle)" |
| ) |
| fetch2CycleInput = Param.Bool( |
| True, |
| "Allow Fetch2 to cross input lines to generate full output each" |
| " cycle", |
| ) |
| |
| decodeInputBufferSize = Param.Unsigned( |
| 3, "Size of input buffer to Decode in cycles-worth of insts." |
| ) |
| decodeToExecuteForwardDelay = Param.Cycles( |
| 1, "Forward cycle delay from Decode to Execute (1 means next cycle)" |
| ) |
| decodeInputWidth = Param.Unsigned( |
| 2, |
| "Width (in instructions) of input to Decode (and implicitly" |
| " Decode's own width)", |
| ) |
| decodeCycleInput = Param.Bool( |
| True, |
| "Allow Decode to pack instructions from more than one input cycle" |
| " to fill its output each cycle", |
| ) |
| |
| executeInputWidth = Param.Unsigned( |
| 2, "Width (in instructions) of input to Execute" |
| ) |
| executeCycleInput = Param.Bool( |
| True, |
| "Allow Execute to use instructions from more than one input cycle" |
| " each cycle", |
| ) |
| executeIssueLimit = Param.Unsigned( |
| 2, "Number of issuable instructions in Execute each cycle" |
| ) |
| executeMemoryIssueLimit = Param.Unsigned( |
| 1, "Number of issuable memory instructions in Execute each cycle" |
| ) |
| executeCommitLimit = Param.Unsigned( |
| 2, "Number of committable instructions in Execute each cycle" |
| ) |
| executeMemoryCommitLimit = Param.Unsigned( |
| 1, "Number of committable memory references in Execute each cycle" |
| ) |
| executeInputBufferSize = Param.Unsigned( |
| 7, "Size of input buffer to Execute in cycles-worth of insts." |
| ) |
| executeMemoryWidth = Param.Unsigned( |
| 0, |
| "Width (and snap) in bytes of the data memory interface. (0 mean use" |
| " the system cacheLineSize)", |
| ) |
| executeMaxAccessesInMemory = Param.Unsigned( |
| 2, |
| "Maximum number of concurrent accesses allowed to the memory system" |
| " from the dcache port", |
| ) |
| executeLSQMaxStoreBufferStoresPerCycle = Param.Unsigned( |
| 2, "Maximum number of stores that the store buffer can issue per cycle" |
| ) |
| executeLSQRequestsQueueSize = Param.Unsigned( |
| 1, "Size of LSQ requests queue (address translation queue)" |
| ) |
| executeLSQTransfersQueueSize = Param.Unsigned( |
| 2, "Size of LSQ transfers queue (memory transaction queue)" |
| ) |
| executeLSQStoreBufferSize = Param.Unsigned(5, "Size of LSQ store buffer") |
| executeBranchDelay = Param.Cycles( |
| 1, |
| "Delay from Execute deciding to branch and Fetch1 reacting" |
| " (1 means next cycle)", |
| ) |
| |
| executeFuncUnits = Param.MinorFUPool( |
| MinorDefaultFUPool(), "FUlines for this processor" |
| ) |
| |
| executeSetTraceTimeOnCommit = Param.Bool( |
| True, "Set inst. trace times to be commit times" |
| ) |
| executeSetTraceTimeOnIssue = Param.Bool( |
| False, "Set inst. trace times to be issue times" |
| ) |
| |
| executeAllowEarlyMemoryIssue = Param.Bool( |
| True, |
| "Allow mem refs to be issued to the LSQ before reaching the head of" |
| " the in flight insts queue", |
| ) |
| |
| enableIdling = Param.Bool( |
| True, "Enable cycle skipping when the processor is idle\n" |
| ) |
| |
| branchPred = Param.BranchPredictor( |
| TournamentBP(numThreads=Parent.numThreads), "Branch Predictor" |
| ) |
| |
| def addCheckerCpu(self): |
| print("Checker not yet supported by MinorCPU") |
| exit(1) |
