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# -*- mode:python -*-
# Copyright (c) 2020 ARM Limited
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from m5.objects.ArmTLB import ArmITB, ArmDTB, ArmStage2TLB
from m5.objects.BaseMMU import BaseMMU
from m5.objects.ClockedObject import ClockedObject
from m5.params import *
from m5.proxy import *
# Basic stage 1 translation objects
class ArmTableWalker(ClockedObject):
type = 'ArmTableWalker'
cxx_class = 'gem5::ArmISA::TableWalker'
cxx_header = "arch/arm/table_walker.hh"
is_stage2 = Param.Bool(False, "Is this object for stage 2 translation?")
num_squash_per_cycle = Param.Unsigned(2,
"Number of outstanding walks that can be squashed per cycle")
port = RequestPort("Table Walker port")
sys = Param.System(Parent.any, "system object parameter")
# Stage 2 translation objects, only used when virtualisation is being used
class ArmStage2TableWalker(ArmTableWalker):
is_stage2 = True
class ArmMMU(BaseMMU):
type = 'ArmMMU'
cxx_class = 'gem5::ArmISA::MMU'
cxx_header = 'arch/arm/mmu.hh'
itb = ArmITB()
dtb = ArmDTB()
sys = Param.System(Parent.any, "system object parameter")
stage2_itb = Param.ArmTLB(ArmStage2TLB(), "Stage 2 Instruction TLB")
stage2_dtb = Param.ArmTLB(ArmStage2TLB(), "Stage 2 Data TLB")
itb_walker = Param.ArmTableWalker(
ArmTableWalker(), "HW Table walker")
dtb_walker = Param.ArmTableWalker(
ArmTableWalker(), "HW Table walker")
stage2_itb_walker = Param.ArmTableWalker(
ArmStage2TableWalker(), "HW Table walker")
stage2_dtb_walker = Param.ArmTableWalker(
ArmStage2TableWalker(), "HW Table walker")
@classmethod
def walkerPorts(cls):
return ["mmu.itb_walker.port", "mmu.dtb_walker.port"]
def connectWalkerPorts(self, iport, dport):
self.itb_walker.port = iport
self.dtb_walker.port = dport