cmos.cc revision 5634 
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->signalInterrupt();
40}
41
42Tick
43X86ISA::Cmos::read(PacketPtr pkt)
44{
45    assert(pkt->getSize() == 1);
46    switch(pkt->getAddr() - pioAddr)
47    {
48      case 0x0:
49        pkt->set(address);
50        break;
51      case 0x1:
52        pkt->set(readRegister(address));
53        break;
54      default:
55        panic("Read from undefined CMOS port.\n");
56    }
57    return latency;
58}
59
60Tick
61X86ISA::Cmos::write(PacketPtr pkt)
62{
63    assert(pkt->getSize() == 1);
64    switch(pkt->getAddr() - pioAddr)
65    {
66      case 0x0:
67        address = pkt->get<uint8_t>();
68        break;
69      case 0x1:
70        writeRegister(address, pkt->get<uint8_t>());
71        break;
72      default:
73        panic("Write to undefined CMOS port.\n");
74    }
75    return latency;
76}
77
78uint8_t
79X86ISA::Cmos::readRegister(uint8_t reg)
80{
81    assert(reg < numRegs);
82    uint8_t val;
83    if (reg <= 0xD) {
84        val = rtc.readData(reg);
85        DPRINTF(CMOS,
86	    "Reading CMOS RTC reg %x as %x.\n", reg, val);
87    } else {
88        val = regs[reg];
89        DPRINTF(CMOS,
90	    "Reading non-volitile CMOS address %x as %x.\n", reg, val);
91    }
92    return val;
93}
94
95void
96X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
97{
98    assert(reg < numRegs);
99    if (reg <= 0xD) {
100        DPRINTF(CMOS, "Writing CMOS RTC reg %x with %x.\n",
101	        reg, val);
102        rtc.writeData(reg, val);
103    } else {
104        DPRINTF(CMOS, "Writing non-volitile CMOS address %x with %x.\n",
105	        reg, val);
106        regs[reg] = val;
107    }
108}
109
110X86ISA::Cmos *
111CmosParams::create()
112{
113    return new X86ISA::Cmos(this);
114}
115