2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
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9 * redistributions in binary form must reproduce the above copyright
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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.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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33 #ifndef __DEV_MC146818_HH__
34 #define __DEV_MC146818_HH__
36 #include "base/range.hh"
37 #include "sim/eventq.hh"
39 /** Real-Time Clock (MC146818) */
40 class MC146818 : public EventManager
43 virtual void handleEvent()
45 warn("No RTC event handler defined.\n");
49 /** Event for RTC periodic interrupt */
50 struct RTCEvent : public Event
55 RTCEvent(MC146818 * _parent, Tick i);
57 /** Schedule the RTC periodic interrupt */
60 /** Event process to occur at interrupt*/
61 virtual void process();
63 /** Event description */
64 virtual const char *description() const;
69 const std::string &name() const { return _name; }
71 /** RTC periodic interrupt event */
74 /** Data for real-time clock function */
76 uint8_t clock_data[10];
92 /** RTC status register A */
95 /** RTC status register B */
99 MC146818(EventManager *em, const std::string &name, const struct tm time,
100 bool bcd, Tick frequency);
103 /** RTC write data */
104 void writeData(const uint8_t addr, const uint8_t data);
107 uint8_t readData(const uint8_t addr);
110 * Serialize this object to the given output stream.
111 * @param base The base name of the counter object.
112 * @param os The stream to serialize to.
114 void serialize(const std::string &base, std::ostream &os);
117 * Reconstruct the state of this object from a checkpoint.
118 * @param base The base name of the counter object.
119 * @param cp The checkpoint use.
120 * @param section The section name of this object
122 void unserialize(const std::string &base, Checkpoint *cp,
123 const std::string §ion);
126 #endif // __DEV_MC146818_HH__