cmos.cc revision 5827:ac2c268bf4f1 
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#include "dev/x86/intdev.hh"
33#include "mem/packet_access.hh"
34
35void
36X86ISA::Cmos::X86RTC::handleEvent()
37{
38    assert(intPin);
39    intPin->raise();
40    //XXX This is a hack.
41    intPin->lower();
42}
43
44Tick
45X86ISA::Cmos::read(PacketPtr pkt)
46{
47    assert(pkt->getSize() == 1);
48    switch(pkt->getAddr() - pioAddr)
49    {
50      case 0x0:
51        pkt->set(address);
52        break;
53      case 0x1:
54        pkt->set(readRegister(address));
55        break;
56      default:
57        panic("Read from undefined CMOS port.\n");
58    }
59    return latency;
60}
61
62Tick
63X86ISA::Cmos::write(PacketPtr pkt)
64{
65    assert(pkt->getSize() == 1);
66    switch(pkt->getAddr() - pioAddr)
67    {
68      case 0x0:
69        address = pkt->get<uint8_t>();
70        break;
71      case 0x1:
72        writeRegister(address, pkt->get<uint8_t>());
73        break;
74      default:
75        panic("Write to undefined CMOS port.\n");
76    }
77    return latency;
78}
79
80uint8_t
81X86ISA::Cmos::readRegister(uint8_t reg)
82{
83    assert(reg < numRegs);
84    uint8_t val;
85    if (reg <= 0xD) {
86        val = rtc.readData(reg);
87        DPRINTF(CMOS,
88	    "Reading CMOS RTC reg %x as %x.\n", reg, val);
89    } else {
90        val = regs[reg];
91        DPRINTF(CMOS,
92	    "Reading non-volitile CMOS address %x as %x.\n", reg, val);
93    }
94    return val;
95}
96
97void
98X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
99{
100    assert(reg < numRegs);
101    if (reg <= 0xD) {
102        DPRINTF(CMOS, "Writing CMOS RTC reg %x with %x.\n",
103	        reg, val);
104        rtc.writeData(reg, val);
105    } else {
106        DPRINTF(CMOS, "Writing non-volitile CMOS address %x with %x.\n",
107	        reg, val);
108        regs[reg] = val;
109    }
110}
111
112X86ISA::Cmos *
113CmosParams::create()
114{
115    return new X86ISA::Cmos(this);
116}
117