using namespace std;
-Intel8254Timer::Intel8254Timer(const string &name)
- : _name(name), counter0(name + ".counter0"), counter1(name + ".counter1"),
- counter2(name + ".counter2")
+Intel8254Timer::Intel8254Timer(EventManager *em, const string &name,
+ Counter *counter0, Counter *counter1, Counter *counter2) :
+ EventManager(em), _name(name)
{
- counter[0] = &counter0;
- counter[1] = &counter0;
- counter[2] = &counter0;
+ counter[0] = counter0;
+ counter[1] = counter1;
+ counter[2] = counter2;
+}
+
+Intel8254Timer::Intel8254Timer(EventManager *em, const string &name) :
+ EventManager(em), _name(name)
+{
+ counter[0] = new Counter(this, name + ".counter0", 0);
+ counter[1] = new Counter(this, name + ".counter1", 1);
+ counter[2] = new Counter(this, name + ".counter2", 2);
}
void
Intel8254Timer::serialize(const string &base, ostream &os)
{
// serialize the counters
- counter0.serialize(base + ".counter0", os);
- counter1.serialize(base + ".counter1", os);
- counter2.serialize(base + ".counter2", os);
+ counter[0]->serialize(base + ".counter0", os);
+ counter[1]->serialize(base + ".counter1", os);
+ counter[2]->serialize(base + ".counter2", os);
}
void
const string §ion)
{
// unserialze the counters
- counter0.unserialize(base + ".counter0", cp, section);
- counter1.unserialize(base + ".counter1", cp, section);
- counter2.unserialize(base + ".counter2", cp, section);
+ counter[0]->unserialize(base + ".counter0", cp, section);
+ counter[1]->unserialize(base + ".counter1", cp, section);
+ counter[2]->unserialize(base + ".counter2", cp, section);
}
-Intel8254Timer::Counter::Counter(const string &name)
- : _name(name), event(this), count(0), latched_count(0), period(0),
- mode(0), output_high(false), latch_on(false), read_byte(LSB),
- write_byte(LSB)
+Intel8254Timer::Counter::Counter(Intel8254Timer *p,
+ const string &name, unsigned int _num)
+ : _name(name), num(_num), event(this), initial_count(0),
+ latched_count(0), period(0), mode(0), output_high(false),
+ latch_on(false), read_byte(LSB), write_byte(LSB), parent(p)
{
}
if(!latch_on) {
latch_on = true;
read_byte = LSB;
- latched_count = count;
+ latched_count = currentCount();
+ }
+}
+
+int
+Intel8254Timer::Counter::currentCount()
+{
+ int clocks = event.clocksLeft();
+ if (clocks == -1) {
+ warn_once("Reading current count from inactive timer.\n");
+ return 0;
}
+ if (mode == RateGen || mode == SquareWave)
+ return clocks + 1;
+ else
+ return clocks;
}
uint8_t
panic("Shouldn't be here");
}
} else {
+ uint16_t count = currentCount();
switch (read_byte) {
case LSB:
read_byte = MSB;
{
switch (write_byte) {
case LSB:
- count = (count & 0xFF00) | data;
+ initial_count = (initial_count & 0xFF00) | data;
if (event.scheduled())
- event.deschedule();
+ parent->deschedule(event);
output_high = false;
write_byte = MSB;
break;
case MSB:
- count = (count & 0x00FF) | (data << 8);
+ initial_count = (initial_count & 0x00FF) | (data << 8);
// In the RateGen or SquareWave modes, the timer wraps around and
// triggers on a value of 1, not 0.
if (mode == RateGen || mode == SquareWave)
- period = count - 1;
+ period = initial_count - 1;
else
- period = count;
+ period = initial_count;
if (period > 0)
event.setTo(period);
void
Intel8254Timer::Counter::serialize(const string &base, ostream &os)
{
- paramOut(os, base + ".count", count);
+ paramOut(os, base + ".initial_count", initial_count);
paramOut(os, base + ".latched_count", latched_count);
paramOut(os, base + ".period", period);
paramOut(os, base + ".mode", mode);
Intel8254Timer::Counter::unserialize(const string &base, Checkpoint *cp,
const string §ion)
{
- paramIn(cp, section, base + ".count", count);
+ paramIn(cp, section, base + ".initial_count", initial_count);
paramIn(cp, section, base + ".latched_count", latched_count);
paramIn(cp, section, base + ".period", period);
paramIn(cp, section, base + ".mode", mode);
Tick event_tick;
paramIn(cp, section, base + ".event_tick", event_tick);
if (event_tick)
- event.schedule(event_tick);
+ parent->schedule(event, event_tick);
}
Intel8254Timer::Counter::CounterEvent::CounterEvent(Counter* c_ptr)
- : Event(&mainEventQueue)
{
interval = (Tick)(Clock::Float::s / 1193180.0);
counter = c_ptr;
void
Intel8254Timer::Counter::CounterEvent::process()
{
- DPRINTF(Intel8254Timer, "Timer Interrupt\n");
switch (counter->mode) {
case InitTc:
counter->output_high = true;
default:
panic("Unimplemented PITimer mode.\n");
}
+ counter->parent->counterInterrupt(counter->num);
}
void
panic("Timer can't be set to go off instantly.\n");
DPRINTF(Intel8254Timer, "Timer set to curTick + %d\n",
clocks * interval);
- schedule(curTick + clocks * interval);
+ counter->parent->schedule(this, curTick + clocks * interval);
+}
+
+int
+Intel8254Timer::Counter::CounterEvent::clocksLeft()
+{
+ if (!scheduled())
+ return -1;
+ return (when() - curTick + interval - 1) / interval;
}
const char *
Intel8254Timer::Counter::CounterEvent::description() const
{
- return "tsunami 8254 Interval timer";
+ return "Intel 8254 Interval timer";
}