src/arch/arm/ArmCPU.py

# Copyright 2021 Google, Inc.
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from m5.proxy import Self

from m5.objects.BaseAtomicSimpleCPU import BaseAtomicSimpleCPU
from m5.objects.BaseNonCachingSimpleCPU import BaseNonCachingSimpleCPU
from m5.objects.BaseTimingSimpleCPU import BaseTimingSimpleCPU
from m5.objects.BaseO3CPU import BaseO3CPU
from m5.objects.BaseO3Checker import BaseO3Checker
from m5.objects.BaseMinorCPU import BaseMinorCPU
from m5.objects.ArmDecoder import ArmDecoder
from m5.objects.ArmMMU import ArmMMU
from m5.objects.ArmInterrupts import ArmInterrupts
from m5.objects.ArmISA import ArmISA


class ArmCPU:
    ArchDecoder = ArmDecoder
    ArchMMU = ArmMMU
    ArchInterrupts = ArmInterrupts
    ArchISA = ArmISA


class ArmAtomicSimpleCPU(BaseAtomicSimpleCPU, ArmCPU):
    mmu = ArmMMU()


class ArmNonCachingSimpleCPU(BaseNonCachingSimpleCPU, ArmCPU):
    mmu = ArmMMU()


class ArmTimingSimpleCPU(BaseTimingSimpleCPU, ArmCPU):
    mmu = ArmMMU()


class ArmO3Checker(BaseO3Checker, ArmCPU):
    mmu = ArmMMU()


class ArmO3CPU(BaseO3CPU, ArmCPU):
    mmu = ArmMMU()

    # For x86, each CC reg is used to hold only a subset of the
    # flags, so we need 4-5 times the number of CC regs as
    # physical integer regs to be sure we don't run out.  In
    # typical real machines, CC regs are not explicitly renamed
    # (it's a side effect of int reg renaming), so they should
    # never be the bottleneck here.
    numPhysCCRegs = Self.numPhysIntRegs * 5

    def addCheckerCpu(self):
        self.checker = ArmO3Checker(
            workload=self.workload,
            exitOnError=False,
            updateOnError=True,
            warnOnlyOnLoadError=True,
        )
        self.checker.mmu.itb.size = self.mmu.itb.size
        self.checker.mmu.dtb.size = self.mmu.dtb.size
        self.checker.cpu_id = self.cpu_id


class ArmMinorCPU(BaseMinorCPU, ArmCPU):
    mmu = ArmMMU()