1/*
2 * Copyright (c) 2004-2005 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 "dev/x86/cmos.hh"
32
33#include "debug/CMOS.hh"
34#include "dev/x86/intdev.hh"
35#include "mem/packet_access.hh"
36
37void
38X86ISA::Cmos::X86RTC::handleEvent()
39{
40    for (auto *wire: intPin) {
41        wire->raise();
42        //XXX This is a hack.
43        wire->lower();
44    }
45}
46
47Tick
48X86ISA::Cmos::read(PacketPtr pkt)
49{
50    assert(pkt->getSize() == 1);
51    switch(pkt->getAddr() - pioAddr)
52    {
53      case 0x0:
54        pkt->setLE(address);
55        break;
56      case 0x1:
57        pkt->setLE(readRegister(address));
58        break;
59      default:
60        panic("Read from undefined CMOS port.\n");
61    }
62    pkt->makeAtomicResponse();
63    return latency;
64}
65
66Tick
67X86ISA::Cmos::write(PacketPtr pkt)
68{
69    assert(pkt->getSize() == 1);
70    switch(pkt->getAddr() - pioAddr)
71    {
72      case 0x0:
73        address = pkt->getLE<uint8_t>();
74        break;
75      case 0x1:
76        writeRegister(address, pkt->getLE<uint8_t>());
77        break;
78      default:
79        panic("Write to undefined CMOS port.\n");
80    }
81    pkt->makeAtomicResponse();
82    return latency;
83}
84
85uint8_t
86X86ISA::Cmos::readRegister(uint8_t reg)
87{
88    assert(reg < numRegs);
89    uint8_t val;
90    if (reg <= 0xD) {
91        val = rtc.readData(reg);
92        DPRINTF(CMOS,
93            "Reading CMOS RTC reg %x as %x.\n", reg, val);
94    } else {
95        val = regs[reg];
96        DPRINTF(CMOS,
97            "Reading non-volitile CMOS address %x as %x.\n", reg, val);
98    }
99    return val;
100}
101
102void
103X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
104{
105    assert(reg < numRegs);
106    if (reg <= 0xD) {
107        DPRINTF(CMOS, "Writing CMOS RTC reg %x with %x.\n",
108                reg, val);
109        rtc.writeData(reg, val);
110    } else {
111        DPRINTF(CMOS, "Writing non-volitile CMOS address %x with %x.\n",
112                reg, val);
113        regs[reg] = val;
114    }
115}
116
117void
118X86ISA::Cmos::startup()
119{
120    rtc.startup();
121}
122
123void
124X86ISA::Cmos::serialize(CheckpointOut &cp) const
125{
126    SERIALIZE_SCALAR(address);
127    SERIALIZE_ARRAY(regs, numRegs);
128
129    // Serialize the timer
130    rtc.serialize("rtc", cp);
131}
132
133void
134X86ISA::Cmos::unserialize(CheckpointIn &cp)
135{
136    UNSERIALIZE_SCALAR(address);
137    UNSERIALIZE_ARRAY(regs, numRegs);
138
139    // Serialize the timer
140    rtc.unserialize("rtc", cp);
141}
142
143X86ISA::Cmos *
144CmosParams::create()
145{
146    return new X86ISA::Cmos(this);
147}
148