cmos.hh revision 5611 
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#ifndef __DEV_X86_SOUTH_BRIDGE_CMOS_HH__
32#define __DEV_X86_SOUTH_BRIDGE_CMOS_HH__
33
34#include "arch/x86/x86_traits.hh"
35#include "base/range.hh"
36#include "dev/mc146818.hh"
37#include "dev/x86/south_bridge/sub_device.hh"
38
39namespace X86ISA
40{
41
42class Cmos : public SubDevice
43{
44  protected:
45    uint8_t address;
46
47    struct tm foo_time;
48
49    static const int numRegs = 128;
50
51    uint8_t regs[numRegs];
52
53    uint8_t readRegister(uint8_t reg);
54    void writeRegister(uint8_t reg, uint8_t val);
55
56    class X86RTC : public MC146818
57    {
58      public:
59        X86RTC(EventManager *em, const std::string &n, const struct tm time,
60                bool bcd, Tick frequency) :
61            MC146818(em, n, time, bcd, frequency)
62        {
63        }
64      protected:
65        void handleEvent()
66        {
67            return;
68        }
69    } rtc;
70
71  public:
72
73    Cmos(EventManager *em) : rtc(em, "rtc", foo_time, true, ULL(5000000000))
74    {
75        memset(regs, 0, numRegs * sizeof(uint8_t));
76        address = 0;
77    }
78
79    Cmos(EventManager *em, Tick _latency) : SubDevice(_latency),
80        rtc(em, "rtc", foo_time, true, ULL(5000000000))
81    {
82        memset(regs, 0, numRegs * sizeof(uint8_t));
83        address = 0;
84    }
85
86    Cmos(EventManager *em, Addr start, Addr size, Tick _latency) :
87        SubDevice(start, size, _latency),
88        rtc(em, "rtc", foo_time, true, ULL(5000000000))
89    {
90        memset(regs, 0, numRegs * sizeof(uint8_t));
91        address = 0;
92    }
93
94    Tick read(PacketPtr pkt);
95
96    Tick write(PacketPtr pkt);
97};
98
99}; // namespace X86ISA
100
101#endif //__DEV_X86_SOUTH_BRIDGE_CMOS_HH__
102