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# Copyright (c) 2008 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from m5.params import *
from m5.proxy import *
from m5.objects.Cmos import Cmos
from m5.objects.I8042 import I8042
from m5.objects.I82094AA import I82094AA
from m5.objects.I8237 import I8237
from m5.objects.I8254 import I8254
from m5.objects.I8259 import I8259
from m5.objects.PciDevice import PciLegacyIoBar, PciIoBar
from m5.objects.PcSpeaker import PcSpeaker
from m5.objects.X86Ide import X86IdeController
from m5.SimObject import SimObject
def x86IOAddress(port):
IO_address_space_base = 0x8000000000000000
return IO_address_space_base + port
class SouthBridge(SimObject):
type = "SouthBridge"
cxx_header = "dev/x86/south_bridge.hh"
cxx_class = "gem5::SouthBridge"
pic1 = Param.I8259(
I8259(pio_addr=x86IOAddress(0x20), mode="I8259Master"), "Master PIC"
)
pic2 = Param.I8259(
I8259(pio_addr=x86IOAddress(0xA0), mode="I8259Slave"), "Slave PIC"
)
cmos = Param.Cmos(
Cmos(pio_addr=x86IOAddress(0x70)),
"CMOS memory and real time clock device",
)
dma1 = Param.I8237(
I8237(pio_addr=x86IOAddress(0x0)), "The first dma controller"
)
keyboard = Param.I8042(
I8042(data_port=x86IOAddress(0x60), command_port=x86IOAddress(0x64)),
"The keyboard controller",
)
pit = Param.I8254(
I8254(pio_addr=x86IOAddress(0x40)), "Programmable interval timer"
)
speaker = Param.PcSpeaker(
PcSpeaker(pio_addr=x86IOAddress(0x61)), "PC speaker"
)
io_apic = Param.I82094AA(I82094AA(pio_addr=0xFEC00000), "I/O APIC")
# IDE controller
ide = X86IdeController(disks=[], pci_func=0, pci_dev=4, pci_bus=0)
def attachIO(self, bus, dma_ports):
# Route interrupt signals
self.pic1.output = self.io_apic.inputs[0]
self.pic2.output = self.pic1.inputs[2]
self.cmos.int_pin = self.pic2.inputs[0]
self.pit.int_pin = self.pic1.inputs[0]
self.pit.int_pin = self.io_apic.inputs[2]
self.keyboard.keyboard_int_pin = self.io_apic.inputs[1]
self.keyboard.mouse_int_pin = self.io_apic.inputs[12]
self.ide.int_primary = self.pic2.inputs[6]
self.ide.int_primary = self.io_apic.inputs[14]
self.ide.int_secondary = self.pic2.inputs[7]
self.ide.int_secondary = self.io_apic.inputs[15]
# Tell the devices about each other
self.pic1.slave = self.pic2
self.speaker.i8254 = self.pit
# Connect to the bus
self.cmos.pio = bus.mem_side_ports
self.dma1.pio = bus.mem_side_ports
self.ide.pio = bus.mem_side_ports
if dma_ports.count(self.ide.dma) == 0:
self.ide.dma = bus.cpu_side_ports
self.keyboard.pio = bus.mem_side_ports
self.pic1.pio = bus.mem_side_ports
self.pic2.pio = bus.mem_side_ports
self.pit.pio = bus.mem_side_ports
self.speaker.pio = bus.mem_side_ports
self.io_apic.pio = bus.mem_side_ports
self.io_apic.int_requestor = bus.cpu_side_ports