south_bridge.cc revision 5446 
1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include "arch/x86/x86_traits.hh"
32#include "base/range.hh"
33#include "dev/x86/pc.hh"
34#include "dev/x86/south_bridge/south_bridge.hh"
35
36using namespace X86ISA;
37
38void
39SouthBridge::addDevice(X86ISA::SubDevice & sub)
40{
41    rangeList.push_back(sub.addrRange);
42    rangeMap.insert(sub.addrRange, &sub);
43}
44
45void
46SouthBridge::addressRanges(AddrRangeList &range_list)
47{
48    range_list = rangeList;
49}
50
51Tick
52SouthBridge::read(PacketPtr pkt)
53{
54    RangeMapIt sub =
55        rangeMap.find(RangeSize(pkt->getAddr(), 1));
56    assert(sub != rangeMap.end());
57    return sub->second->read(pkt);
58}
59
60Tick
61SouthBridge::write(PacketPtr pkt)
62{
63    RangeMapIt sub =
64        rangeMap.find(RangeSize(pkt->getAddr(), 1));
65    assert(sub != rangeMap.end());
66    return sub->second->write(pkt);
67}
68
69SouthBridge::SouthBridge(const Params *p) : PioDevice(p),
70    pic1(0x20, 2, p->pio_latency),
71    pic2(0xA0, 2, p->pio_latency),
72    pit(p->name + ".pit", 0x40, 4, p->pio_latency),
73    cmos(0x70, 2, p->pio_latency),
74    speaker(&pit, 0x61, 1, p->pio_latency)
75{
76    addDevice(pic1);
77    addDevice(pic2);
78    addDevice(pit);
79    addDevice(cmos);
80    addDevice(speaker);
81
82    // Let the platform know where we are
83    PC * pc = dynamic_cast<PC *>(platform);
84    assert(pc);
85    pc->southBridge = this;
86}
87
88SouthBridge *
89SouthBridgeParams::create()
90{
91    return new SouthBridge(this);
92}
93