src/arch/amdgpu/common/X86GPUTLB.py

# Copyright (c) 2011-2015 Advanced Micro Devices, Inc.
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from m5.defines import buildEnv
from m5.params import *
from m5.proxy import *

from m5.objects.ClockedObject import ClockedObject
from m5.SimObject import SimObject


class X86GPUTLB(ClockedObject):
    type = "X86GPUTLB"
    cxx_class = "gem5::X86ISA::GpuTLB"
    cxx_header = "arch/amdgpu/common/tlb.hh"
    size = Param.Int(64, "TLB size (number of entries)")
    assoc = Param.Int(64, "TLB associativity")

    if buildEnv.get("FULL_SYSTEM", False):
        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")
    cpu_side_ports = VectorResponsePort("Ports on side closer to CPU/CU")
    slave = DeprecatedParam(
        cpu_side_ports, "`slave` is now called `cpu_side_ports`"
    )
    mem_side_ports = VectorRequestPort("Ports on side closer to memory")
    master = DeprecatedParam(
        mem_side_ports, "`master` is now called `mem_side_ports`"
    )
    allocationPolicy = Param.Bool(True, "Allocate on an access")
    accessDistance = Param.Bool(False, "print accessDistance stats")


class TLBCoalescer(ClockedObject):
    type = "TLBCoalescer"
    cxx_class = "gem5::TLBCoalescer"
    cxx_header = "arch/amdgpu/common/tlb_coalescer.hh"

    probesPerCycle = Param.Int(2, "Number of TLB probes per cycle")
    coalescingWindow = Param.Int(1, "Permit coalescing across that many ticks")
    cpu_side_ports = VectorResponsePort("Port on side closer to CPU/CU")
    slave = DeprecatedParam(
        cpu_side_ports, "`slave` is now called `cpu_side_ports`"
    )
    mem_side_ports = VectorRequestPort("Port on side closer to memory")
    master = DeprecatedParam(
        mem_side_ports, "`master` is now called `mem_side_ports`"
    )
    disableCoalescing = Param.Bool(False, "Dispable Coalescing")