src/python/m5/objects/O3CPU.py

   1 from m5.params import *
   2 from m5.proxy import *
   3 from m5 import build_env
   4 from BaseCPU import BaseCPU
   5 from Checker import O3Checker
   6 from FUPool import *
   7
   8 class DerivO3CPU(BaseCPU):
   9     type = 'DerivO3CPU'
  10     activity = Param.Unsigned(0, "Initial count")
  11     numThreads = Param.Unsigned(1, "number of HW thread contexts")
  12
  13     if build_env['FULL_SYSTEM']:
  14         profile = Param.Latency('0ns', "trace the kernel stack")
  15     if build_env['USE_CHECKER']:
  16         if not build_env['FULL_SYSTEM']:
  17             checker = Param.BaseCPU(O3Checker(workload=Parent.workload,
  18                                               exitOnError=False,
  19                                               updateOnError=True,
  20                                               warnOnlyOnLoadError=False),
  21                                     "checker")
  22         else:
  23             checker = Param.BaseCPU(O3Checker(exitOnError=False, updateOnError=True,
  24                                               warnOnlyOnLoadError=False), "checker")
  25             checker.itb = Parent.itb
  26             checker.dtb = Parent.dtb
  27
  28     cachePorts = Param.Unsigned("Cache Ports")
  29     icache_port = Port("Instruction Port")
  30     dcache_port = Port("Data Port")
  31     _mem_ports = ['icache_port', 'dcache_port']
  32
  33     decodeToFetchDelay = Param.Unsigned(1, "Decode to fetch delay")
  34     renameToFetchDelay = Param.Unsigned(1 ,"Rename to fetch delay")
  35     iewToFetchDelay = Param.Unsigned(1, "Issue/Execute/Writeback to fetch "
  36                                      "delay")
  37     commitToFetchDelay = Param.Unsigned(1, "Commit to fetch delay")
  38     fetchWidth = Param.Unsigned(8, "Fetch width")
  39
  40     renameToDecodeDelay = Param.Unsigned(1, "Rename to decode delay")
  41     iewToDecodeDelay = Param.Unsigned(1, "Issue/Execute/Writeback to decode "
  42                "delay")
  43     commitToDecodeDelay = Param.Unsigned(1, "Commit to decode delay")
  44     fetchToDecodeDelay = Param.Unsigned(1, "Fetch to decode delay")
  45     decodeWidth = Param.Unsigned(8, "Decode width")
  46
  47     iewToRenameDelay = Param.Unsigned(1, "Issue/Execute/Writeback to rename "
  48                "delay")
  49     commitToRenameDelay = Param.Unsigned(1, "Commit to rename delay")
  50     decodeToRenameDelay = Param.Unsigned(1, "Decode to rename delay")
  51     renameWidth = Param.Unsigned(8, "Rename width")
  52
  53     commitToIEWDelay = Param.Unsigned(1, "Commit to "
  54                "Issue/Execute/Writeback delay")
  55     renameToIEWDelay = Param.Unsigned(2, "Rename to "
  56                "Issue/Execute/Writeback delay")
  57     issueToExecuteDelay = Param.Unsigned(1, "Issue to execute delay (internal "
  58               "to the IEW stage)")
  59     dispatchWidth = Param.Unsigned(8, "Dispatch width")
  60     issueWidth = Param.Unsigned(8, "Issue width")
  61     wbWidth = Param.Unsigned(8, "Writeback width")
  62     wbDepth = Param.Unsigned(1, "Writeback depth")
  63     fuPool = Param.FUPool(DefaultFUPool(), "Functional Unit pool")
  64
  65     iewToCommitDelay = Param.Unsigned(1, "Issue/Execute/Writeback to commit "
  66                "delay")
  67     renameToROBDelay = Param.Unsigned(1, "Rename to reorder buffer delay")
  68     commitWidth = Param.Unsigned(8, "Commit width")
  69     squashWidth = Param.Unsigned(8, "Squash width")
  70     trapLatency = Param.Tick(13, "Trap latency")
  71     fetchTrapLatency = Param.Tick(1, "Fetch trap latency")
  72
  73     backComSize = Param.Unsigned(5, "Time buffer size for backwards communication")
  74     forwardComSize = Param.Unsigned(5, "Time buffer size for forward communication")
  75
  76     predType = Param.String("tournament", "Branch predictor type ('local', 'tournament')")
  77     localPredictorSize = Param.Unsigned(2048, "Size of local predictor")
  78     localCtrBits = Param.Unsigned(2, "Bits per counter")
  79     localHistoryTableSize = Param.Unsigned(2048, "Size of local history table")
  80     localHistoryBits = Param.Unsigned(11, "Bits for the local history")
  81     globalPredictorSize = Param.Unsigned(8192, "Size of global predictor")
  82     globalCtrBits = Param.Unsigned(2, "Bits per counter")
  83     globalHistoryBits = Param.Unsigned(13, "Bits of history")
  84     choicePredictorSize = Param.Unsigned(8192, "Size of choice predictor")
  85     choiceCtrBits = Param.Unsigned(2, "Bits of choice counters")
  86
  87     BTBEntries = Param.Unsigned(4096, "Number of BTB entries")
  88     BTBTagSize = Param.Unsigned(16, "Size of the BTB tags, in bits")
  89
  90     RASSize = Param.Unsigned(16, "RAS size")
  91
  92     LQEntries = Param.Unsigned(32, "Number of load queue entries")
  93     SQEntries = Param.Unsigned(32, "Number of store queue entries")
  94     LFSTSize = Param.Unsigned(1024, "Last fetched store table size")
  95     SSITSize = Param.Unsigned(1024, "Store set ID table size")
  96
  97     numRobs = Param.Unsigned(1, "Number of Reorder Buffers");
  98
  99     numPhysIntRegs = Param.Unsigned(256, "Number of physical integer registers")
 100     numPhysFloatRegs = Param.Unsigned(256, "Number of physical floating point "
 101                                       "registers")
 102     numIQEntries = Param.Unsigned(64, "Number of instruction queue entries")
 103     numROBEntries = Param.Unsigned(192, "Number of reorder buffer entries")
 104
 105     instShiftAmt = Param.Unsigned(2, "Number of bits to shift instructions by")
 106
 107     function_trace = Param.Bool(False, "Enable function trace")
 108     function_trace_start = Param.Tick(0, "Cycle to start function trace")
 109
 110     smtNumFetchingThreads = Param.Unsigned("SMT Number of Fetching Threads")
 111     smtFetchPolicy = Param.String("SMT Fetch policy")
 112     smtLSQPolicy    = Param.String("SMT LSQ Sharing Policy")
 113     smtLSQThreshold = Param.String("SMT LSQ Threshold Sharing Parameter")
 114     smtIQPolicy    = Param.String("SMT IQ Sharing Policy")
 115     smtIQThreshold = Param.String("SMT IQ Threshold Sharing Parameter")
 116     smtROBPolicy   = Param.String("SMT ROB Sharing Policy")
 117     smtROBThreshold = Param.String("SMT ROB Threshold Sharing Parameter")
 118     smtCommitPolicy = Param.String("SMT Commit Policy")
 119
 120     def addPrivateSplitL1Caches(self, ic, dc):
 121         BaseCPU.addPrivateSplitL1Caches(self, ic, dc)
 122         self.icache.tgts_per_mshr = 20
 123         self.dcache.tgts_per_mshr = 20