#ifndef __DEV_8254_HH__
#define __DEV_8254_HH__
+#include <string>
+#include <iostream>
+
#include "base/bitunion.hh"
#include "sim/eventq.hh"
#include "sim/host.hh"
#include "sim/serialize.hh"
-#include <string>
-#include <iostream>
-
/** Programmable Interval Timer (Intel 8254) */
-class Intel8254Timer
+class Intel8254Timer : public EventManager
{
+ protected:
BitUnion8(CtrlReg)
Bitfield<7, 6> sel;
Bitfield<5, 4> rw;
CounterEvent(Counter*);
/** Event process */
- virtual void process();
+ void process();
/** Event description */
virtual const char *description() const;
friend class Counter;
+
+ void setTo(int clocks);
};
private:
std::string _name;
const std::string &name() const { return _name; }
+ unsigned int num;
+
CounterEvent event;
/** Current count value */
/** Determine which byte of a 16-bit count value to read/write */
uint8_t read_byte, write_byte;
+ /** Pointer to container */
+ Intel8254Timer *parent;
+
public:
- Counter(const std::string &name);
+ Counter(Intel8254Timer *p, const std::string &name, unsigned int num);
/** Latch the current count (if one is not already latched) */
void latchCount();
const std::string §ion);
};
- private:
+ protected:
std::string _name;
const std::string &name() const { return _name; }
/** PIT has three seperate counters */
Counter *counter[3];
+ virtual void
+ counterInterrupt(unsigned int num)
+ {
+ DPRINTF(Intel8254Timer, "Timer interrupt from counter %d.\n", num);
+ }
+
public:
- /** Public way to access individual counters (avoid array accesses) */
- Counter counter0;
- Counter counter1;
- Counter counter2;
- Intel8254Timer(const std::string &name);
+ virtual
+ ~Intel8254Timer()
+ {}
+
+ Intel8254Timer(EventManager *em, const std::string &name,
+ Counter *counter0, Counter *counter1, Counter *counter2);
+
+ Intel8254Timer(EventManager *em, const std::string &name);
/** Write control word */
void writeControl(const CtrlReg data);
+ uint8_t
+ readCounter(unsigned int num)
+ {
+ assert(num < 3);
+ return counter[num]->read();
+ }
+
+ void
+ writeCounter(unsigned int num, const uint8_t data)
+ {
+ assert(num < 3);
+ counter[num]->write(data);
+ }
+
+ bool
+ outputHigh(unsigned int num)
+ {
+ assert(num < 3);
+ return counter[num]->outputHigh();
+ }
+
/**
* Serialize this object to the given output stream.
* @param base The base name of the counter object.