2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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9 * redistributions in binary form must reproduce the above copyright
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14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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33 #ifndef __DEV_MC146818_HH__
34 #define __DEV_MC146818_HH__
36 #include "sim/eventq.hh"
38 /** Real-Time Clock (MC146818) */
39 class MC146818 : public EventManager
42 virtual void handleEvent()
44 warn("No RTC event handler defined.\n");
48 /** Event for RTC periodic interrupt */
49 struct RTCEvent : public Event
54 RTCEvent(MC146818 * _parent, Tick i);
56 /** Schedule the RTC periodic interrupt */
59 /** Event process to occur at interrupt*/
60 virtual void process();
62 /** Event description */
63 virtual const char *description() const;
66 /** Event for RTC periodic interrupt */
67 struct RTCTickEvent : public Event
71 RTCTickEvent(MC146818 * _parent) : parent(_parent)
73 parent->schedule(this, curTick() + SimClock::Int::s);
76 /** Event process to occur at interrupt*/
79 /** Event description */
80 const char *description() const;
85 const std::string &name() const { return _name; }
87 /** RTC periodic interrupt event */
91 RTCTickEvent tickEvent;
93 /** Data for real-time clock function */
95 uint8_t clock_data[10];
113 void setTime(const struct tm time);
115 /** RTC status register A */
118 /** RTC status register B */
122 MC146818(EventManager *em, const std::string &name, const struct tm time,
123 bool bcd, Tick frequency);
126 /** RTC write data */
127 void writeData(const uint8_t addr, const uint8_t data);
130 uint8_t readData(const uint8_t addr);
135 * Serialize this object to the given output stream.
136 * @param base The base name of the counter object.
137 * @param os The stream to serialize to.
139 void serialize(const std::string &base, std::ostream &os);
142 * Reconstruct the state of this object from a checkpoint.
143 * @param base The base name of the counter object.
144 * @param cp The checkpoint use.
145 * @param section The section name of this object
147 void unserialize(const std::string &base, Checkpoint *cp,
148 const std::string §ion);
151 #endif // __DEV_MC146818_HH__