# Copyright (c) 2008 The Regents of The University of Michigan
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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.Ide import IdeController
from m5.objects.PciDevice import PciLegacyIoBar, PciIoBar
from m5.objects.PcSpeaker import PcSpeaker
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 = IdeController(disks=[], pci_func=0, pci_dev=4, pci_bus=0)
    ide.BAR0 = PciLegacyIoBar(addr=0x1f0, size='8B')
    ide.BAR1 = PciLegacyIoBar(addr=0x3f4, size='3B')
    ide.BAR2 = PciLegacyIoBar(addr=0x170, size='8B')
    ide.BAR3 = PciLegacyIoBar(addr=0x374, size='3B')
    ide.Command = 0
    ide.ProgIF = 0x80
    ide.InterruptLine = 14
    ide.InterruptPin = 1

    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]
        # Tell the devices about each other
        self.pic1.slave = self.pic2
        self.speaker.i8254 = self.pit
        self.io_apic.external_int_pic = self.pic1
        # 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
