1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

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24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Gabe Black
28
29from m5.params import *
30from m5.proxy import *
31from Cmos import Cmos
32from I8254 import I8254
33from I8259 import I8259
34from PcSpeaker import PcSpeaker
35from m5.SimObject import SimObject
36
37def x86IOAddress(port):
38 IO_address_space_base = 0x8000000000000000
39 return IO_address_space_base + port;
40
41class SouthBridge(SimObject):
42 type = 'SouthBridge'
43 pio_latency = Param.Latency('1ns', "Programmed IO latency in simticks")
44 platform = Param.Platform(Parent.any, "Platform this device is part of")
45
46 _pic1 = I8259(pio_addr=x86IOAddress(0x20), mode='I8259Master')
47 _pic2 = I8259(pio_addr=x86IOAddress(0xA0), mode='I8259Slave')
48 _cmos = Cmos(pio_addr=x86IOAddress(0x70))
49 _pit = I8254(pio_addr=x86IOAddress(0x40))
50 _speaker = PcSpeaker(pio_addr=x86IOAddress(0x61))
51
52 pic1 = Param.I8259(_pic1, "Master PIC")
53 pic2 = Param.I8259(_pic2, "Slave PIC")
54 cmos = Param.Cmos(_cmos, "CMOS memory and real time clock device")
55 pit = Param.I8254(_pit, "Programmable interval timer")
56 speaker = Param.PcSpeaker(_speaker, "PC speaker")
57
58 def attachIO(self, bus):
59 # Make internal connections
60 self.pic2.output = self.pic1.pin(2)
61 self.cmos.int_pin = self.pic2.pin(0)
62 self.pit.int_pin = self.pic1.pin(0)
63 self.speaker.i8254 = self.pit
64 # Connect to the bus
65 self.cmos.pio = bus.port
66 self.pic1.pio = bus.port
67 self.pic2.pio = bus.port
68 self.pit.pio = bus.port
69 self.speaker.pio = bus.port