xref: /gem5/src/gpu-compute/X86GPUTLB.py

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# Authors: Lisa Hsu

from m5.defines import buildEnv
from m5.params import *
from m5.proxy import *

from m5.objects.MemObject import MemObject

if buildEnv['FULL_SYSTEM']:
    class X86PagetableWalker(MemObject):
        type = 'X86PagetableWalker'
        cxx_class = 'X86ISA::Walker'
        port = SlavePort("Port for the hardware table walker")
        system = Param.System(Parent.any, "system object")

class X86GPUTLB(MemObject):
    type = 'X86GPUTLB'
    cxx_class = 'X86ISA::GpuTLB'
    cxx_header = 'gpu-compute/gpu_tlb.hh'
    size = Param.Int(64, "TLB size (number of entries)")
    assoc = Param.Int(64, "TLB associativity")

    if buildEnv['FULL_SYSTEM']:
        walker = Param.X86PagetableWalker(X86PagetableWalker(),
                                          "page table walker")

    hitLatency = Param.Int(2, "Latency of a TLB hit")
    missLatency1 = Param.Int(5, "Latency #1 of a TLB miss")
    missLatency2 = Param.Int(100, "Latency #2 of a TLB miss")
    maxOutstandingReqs = Param.Int(64, "# of maximum outstanding requests")
    slave = VectorSlavePort("Port on side closer to CPU/CU")
    master = VectorMasterPort("Port on side closer to memory")
    allocationPolicy = Param.Bool(True, "Allocate on an access")
    accessDistance = Param.Bool(False, "print accessDistance stats")

class TLBCoalescer(MemObject):
    type = 'TLBCoalescer'
    cxx_class = 'TLBCoalescer'
    cxx_header = 'gpu-compute/tlb_coalescer.hh'
    probesPerCycle = Param.Int(2, "Number of TLB probes per cycle")
    coalescingWindow = Param.Int(1, "Permit coalescing across that many ticks")
    slave = VectorSlavePort("Port on side closer to CPU/CU")
    master = VectorMasterPort("Port on side closer to memory")
    disableCoalescing = Param.Bool(False,"Dispable Coalescing")