2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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34 * Malta I/O Space mapping including RTC/timer interrupts
37 #ifndef __DEV_MALTA_IO_HH__
38 #define __DEV_MALTA_IO_HH__
40 #include "base/range.hh"
41 #include "dev/mips/malta.hh"
42 #include "dev/intel_8254_timer.hh"
43 #include "dev/io_device.hh"
44 #include "dev/mc146818.hh"
45 #include "params/MaltaIO.hh"
46 #include "sim/eventq.hh"
49 * Malta I/O device is a catch all for all the south bridge stuff we care
52 class MaltaIO : public BasicPioDevice
59 class RTC : public MC146818
63 RTC(const std::string &name, const MaltaIOParams *p);
68 //Actually interrupt the processor here
69 malta->cchip->postRTC();
73 /** Mask of the PIC1 */
76 /** Mask of the PIC2 */
79 /** Mode of PIC1. Not used for anything */
82 /** Mode of PIC2. Not used for anything */
85 /** Raw PIC interrupt register before masking */
86 uint8_t picr; //Raw PIC interrput register
88 /** Is the pic interrupting right now or not. */
91 /** A pointer to the Malta device which be belong to */
94 /** Intel 8253 Periodic Interval Timer */
95 Intel8254Timer pitimer;
99 /** The interval is set via two writes to the PIT.
100 * This variable contains a flag as to how many writes have happened, and
107 * Return the freqency of the RTC
108 * @return interrupt rate of the RTC
110 Tick frequency() const;
112 typedef MaltaIOParams Params;
117 return dynamic_cast<const Params *>(_params);
121 * Initialize all the data for devices supported by Malta I/O.
122 * @param p pointer to Params struct
124 MaltaIO(const Params *p);
126 virtual Tick read(PacketPtr pkt);
127 virtual Tick write(PacketPtr pkt);
130 /** Post an Interrupt to the CPU */
131 void postIntr(uint8_t interrupt);
133 /** Clear an Interrupt to the CPU */
134 void clearIntr(uint8_t interrupt);
137 * Serialize this object to the given output stream.
138 * @param os The stream to serialize to.
140 virtual void serialize(std::ostream &os);
143 * Reconstruct the state of this object from a checkpoint.
144 * @param cp The checkpoint use.
145 * @param section The section name of this object
147 virtual void unserialize(Checkpoint *cp, const std::string §ion);
151 #endif // __DEV_MALTA_IO_HH__