src/arch/x86/X86LocalApic.py

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

from m5.objects.BaseInterrupts import BaseInterrupts
from m5.objects.ClockDomain import DerivedClockDomain
from m5.objects.IntPin import IntSinkPin

class X86LocalApic(BaseInterrupts):
    type = 'X86LocalApic'
    cxx_class = 'gem5::X86ISA::Interrupts'
    cxx_header = 'arch/x86/interrupts.hh'

    int_requestor = RequestPort("Port for sending interrupt messages")
    int_master    = DeprecatedParam(int_requestor,
                        '`int_master` is now called `int_requestor`')

    int_responder = ResponsePort("Port for receiving interrupt messages")
    int_slave     = DeprecatedParam(int_responder,
                        '`int_slave` is now called `int_responder`')

    lint0 = IntSinkPin('Local interrupt pin 0')
    lint1 = IntSinkPin('Local interrupt pin 1')

    int_latency = Param.Latency('1ns', \
            "Latency for an interrupt to propagate through this device.")
    pio = ResponsePort("Programmed I/O port")
    system = Param.System(Parent.any, "System this device is part of")

    pio_latency = Param.Latency('100ns', 'Programmed IO latency')

    # The clock rate for the local APIC timer is supposed to be the "bus clock"
    # which we assume is 1/16th the rate of the CPU clock. I don't think this
    # is a hard rule, but seems to be true in practice. This can be overriden
    # in configs that use it.
    clk_domain = Param.DerivedClockDomain(
            DerivedClockDomain(clk_domain=Parent.clk_domain, clk_divider=16),
            "The clock for the local APIC. Should not be modified.")