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# Copyright (c) 2012 ARM Limited
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#
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# to a hardware implementation of the functionality of the software
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#
# Copyright (c) 2008 The Regents of The University of Michigan
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# modification, are permitted provided that the following conditions are
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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.SimObject import SimObject
class X86LocalApic(BaseInterrupts):
type = 'X86LocalApic'
cxx_class = 'X86ISA::Interrupts'
cxx_header = 'arch/x86/interrupts.hh'
int_master = MasterPort("Port for sending interrupt messages")
int_slave = SlavePort("Port for receiving interrupt messages")
int_latency = Param.Latency('1ns', \
"Latency for an interrupt to propagate through this device.")
pio = SlavePort("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.")