src/gpu-compute/X86GPUTLB.py

   1 #
   2 #  Copyright (c) 2011-2015 Advanced Micro Devices, Inc.
   3 #  All rights reserved.
   4 #
   5 #  For use for simulation and test purposes only
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   7 #  Redistribution and use in source and binary forms, with or without
   8 #  modification, are permitted provided that the following conditions are met:
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  11 #  this list of conditions and the following disclaimer.
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  14 #  this list of conditions and the following disclaimer in the documentation
  15 #  and/or other materials provided with the distribution.
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  18 #  may be used to endorse or promote products derived from this software
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  21 #  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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  32 #
  33 #  Author: Lisa Hsu
  34 #
  35
  36 from m5.defines import buildEnv
  37 from m5.params import *
  38 from m5.proxy import *
  39
  40 from m5.objects.MemObject import MemObject
  41
  42 if buildEnv['FULL_SYSTEM']:
  43     class X86PagetableWalker(MemObject):
  44         type = 'X86PagetableWalker'
  45         cxx_class = 'X86ISA::Walker'
  46         port = SlavePort("Port for the hardware table walker")
  47         system = Param.System(Parent.any, "system object")
  48
  49 class X86GPUTLB(MemObject):
  50     type = 'X86GPUTLB'
  51     cxx_class = 'X86ISA::GpuTLB'
  52     cxx_header = 'gpu-compute/gpu_tlb.hh'
  53     size = Param.Int(64, "TLB size (number of entries)")
  54     assoc = Param.Int(64, "TLB associativity")
  55
  56     if buildEnv['FULL_SYSTEM']:
  57         walker = Param.X86PagetableWalker(X86PagetableWalker(),
  58                                           "page table walker")
  59
  60     hitLatency = Param.Int(2, "Latency of a TLB hit")
  61     missLatency1 = Param.Int(5, "Latency #1 of a TLB miss")
  62     missLatency2 = Param.Int(100, "Latency #2 of a TLB miss")
  63     maxOutstandingReqs = Param.Int(64, "# of maximum outstanding requests")
  64     slave = VectorSlavePort("Port on side closer to CPU/CU")
  65     master = VectorMasterPort("Port on side closer to memory")
  66     allocationPolicy = Param.Bool(True, "Allocate on an access")
  67     accessDistance = Param.Bool(False, "print accessDistance stats")
  68
  69 class TLBCoalescer(MemObject):
  70     type = 'TLBCoalescer'
  71     cxx_class = 'TLBCoalescer'
  72     cxx_header = 'gpu-compute/tlb_coalescer.hh'
  73     probesPerCycle = Param.Int(2, "Number of TLB probes per cycle")
  74     coalescingWindow = Param.Int(1, "Permit coalescing across that many ticks")
  75     slave = VectorSlavePort("Port on side closer to CPU/CU")
  76     master = VectorMasterPort("Port on side closer to memory")
  77     disableCoalescing = Param.Bool(False,"Dispable Coalescing")