Dev: Seperate the 8254 timer from tsunami and use it in that and the PC.

2 files changed, 2 insertions, 357 deletions

diff --git a/src/dev/alpha/tsunami_io.cc b/src/dev/alpha/tsunami_io.cc
index 88999ecc5..3496aed14 100644
--- a/src/dev/alpha/tsunami_io.cc
+++ b/src/dev/alpha/tsunami_io.cc
@@ -62,230 +62,6 @@ TsunamiIO::TsunamiRTC::TsunamiRTC(const string &n, const TsunamiIOParams *p) :
 {
 }
 
-TsunamiIO::PITimer::PITimer(const string &name)
-    : _name(name), counter0(name + ".counter0"), counter1(name + ".counter1"),
-      counter2(name + ".counter2")
-{
-    counter[0] = &counter0;
-    counter[1] = &counter0;
-    counter[2] = &counter0;
-}
-
-void
-TsunamiIO::PITimer::writeControl(const uint8_t data)
-{
-    int rw;
-    int sel;
-
-    sel = GET_CTRL_SEL(data);
-
-    if (sel == PIT_READ_BACK)
-       panic("PITimer Read-Back Command is not implemented.\n");
-
-    rw = GET_CTRL_RW(data);
-
-    if (rw == PIT_RW_LATCH_COMMAND)
-        counter[sel]->latchCount();
-    else {
-        counter[sel]->setRW(rw);
-        counter[sel]->setMode(GET_CTRL_MODE(data));
-        counter[sel]->setBCD(GET_CTRL_BCD(data));
-    }
-}
-
-void
-TsunamiIO::PITimer::serialize(const string &base, ostream &os)
-{
-    // serialize the counters
-    counter0.serialize(base + ".counter0", os);
-    counter1.serialize(base + ".counter1", os);
-    counter2.serialize(base + ".counter2", os);
-}
-
-void
-TsunamiIO::PITimer::unserialize(const string &base, Checkpoint *cp,
-                                const string &section)
-{
-    // unserialze the counters
-    counter0.unserialize(base + ".counter0", cp, section);
-    counter1.unserialize(base + ".counter1", cp, section);
-    counter2.unserialize(base + ".counter2", cp, section);
-}
-
-TsunamiIO::PITimer::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)
-{
-
-}
-
-void
-TsunamiIO::PITimer::Counter::latchCount()
-{
-    // behave like a real latch
-    if(!latch_on) {
-        latch_on = true;
-        read_byte = LSB;
-        latched_count = count;
-    }
-}
-
-uint8_t
-TsunamiIO::PITimer::Counter::read()
-{
-    if (latch_on) {
-        switch (read_byte) {
-          case LSB:
-            read_byte = MSB;
-            return (uint8_t)latched_count;
-            break;
-          case MSB:
-            read_byte = LSB;
-            latch_on = false;
-            return latched_count >> 8;
-            break;
-          default:
-            panic("Shouldn't be here");
-        }
-    } else {
-        switch (read_byte) {
-          case LSB:
-            read_byte = MSB;
-            return (uint8_t)count;
-            break;
-          case MSB:
-            read_byte = LSB;
-            return count >> 8;
-            break;
-          default:
-            panic("Shouldn't be here");
-        }
-    }
-}
-
-void
-TsunamiIO::PITimer::Counter::write(const uint8_t data)
-{
-    switch (write_byte) {
-      case LSB:
-        count = (count & 0xFF00) | data;
-
-        if (event.scheduled())
-          event.deschedule();
-        output_high = false;
-        write_byte = MSB;
-        break;
-
-      case MSB:
-        count = (count & 0x00FF) | (data << 8);
-        period = count;
-
-        if (period > 0) {
-            DPRINTF(Tsunami, "Timer set to curTick + %d\n",
-                    count * event.interval);
-            event.schedule(curTick + count * event.interval);
-        }
-        write_byte = LSB;
-        break;
-    }
-}
-
-void
-TsunamiIO::PITimer::Counter::setRW(int rw_val)
-{
-    if (rw_val != PIT_RW_16BIT)
-        panic("Only LSB/MSB read/write is implemented.\n");
-}
-
-void
-TsunamiIO::PITimer::Counter::setMode(int mode_val)
-{
-    if(mode_val != PIT_MODE_INTTC && mode_val != PIT_MODE_RATEGEN &&
-       mode_val != PIT_MODE_SQWAVE)
-        panic("PIT mode %#x is not implemented: \n", mode_val);
-
-    mode = mode_val;
-}
-
-void
-TsunamiIO::PITimer::Counter::setBCD(int bcd_val)
-{
-    if (bcd_val != PIT_BCD_FALSE)
-        panic("PITimer does not implement BCD counts.\n");
-}
-
-bool
-TsunamiIO::PITimer::Counter::outputHigh()
-{
-    return output_high;
-}
-
-void
-TsunamiIO::PITimer::Counter::serialize(const string &base, ostream &os)
-{
-    paramOut(os, base + ".count", count);
-    paramOut(os, base + ".latched_count", latched_count);
-    paramOut(os, base + ".period", period);
-    paramOut(os, base + ".mode", mode);
-    paramOut(os, base + ".output_high", output_high);
-    paramOut(os, base + ".latch_on", latch_on);
-    paramOut(os, base + ".read_byte", read_byte);
-    paramOut(os, base + ".write_byte", write_byte);
-
-    Tick event_tick = 0;
-    if (event.scheduled())
-        event_tick = event.when();
-    paramOut(os, base + ".event_tick", event_tick);
-}
-
-void
-TsunamiIO::PITimer::Counter::unserialize(const string &base, Checkpoint *cp,
-                                         const string &section)
-{
-    paramIn(cp, section, base + ".count", count);
-    paramIn(cp, section, base + ".latched_count", latched_count);
-    paramIn(cp, section, base + ".period", period);
-    paramIn(cp, section, base + ".mode", mode);
-    paramIn(cp, section, base + ".output_high", output_high);
-    paramIn(cp, section, base + ".latch_on", latch_on);
-    paramIn(cp, section, base + ".read_byte", read_byte);
-    paramIn(cp, section, base + ".write_byte", write_byte);
-
-    Tick event_tick;
-    paramIn(cp, section, base + ".event_tick", event_tick);
-    if (event_tick)
-        event.schedule(event_tick);
-}
-
-TsunamiIO::PITimer::Counter::CounterEvent::CounterEvent(Counter* c_ptr)
-    : Event(&mainEventQueue)
-{
-    interval = (Tick)(Clock::Float::s / 1193180.0);
-    counter = c_ptr;
-}
-
-void
-TsunamiIO::PITimer::Counter::CounterEvent::process()
-{
-    DPRINTF(Tsunami, "Timer Interrupt\n");
-    switch (counter->mode) {
-      case PIT_MODE_INTTC:
-        counter->output_high = true;
-      case PIT_MODE_RATEGEN:
-      case PIT_MODE_SQWAVE:
-        break;
-      default:
-        panic("Unimplemented PITimer mode.\n");
-    }
-}
-
-const char *
-TsunamiIO::PITimer::Counter::CounterEvent::description() const
-{
-    return "tsunami 8254 Interval timer";
-}
-
 TsunamiIO::TsunamiIO(const Params *p)
     : BasicPioDevice(p), tsunami(p->tsunami), pitimer(p->name + "pitimer"),
       rtc(p->name + ".rtc", p)
diff --git a/src/dev/alpha/tsunami_io.hh b/src/dev/alpha/tsunami_io.hh
index 3972efa48..736f498c7 100644
--- a/src/dev/alpha/tsunami_io.hh
+++ b/src/dev/alpha/tsunami_io.hh
@@ -39,6 +39,7 @@
 
 #include "base/range.hh"
 #include "dev/alpha/tsunami.hh"
+#include "dev/intel_8254_timer.hh"
 #include "dev/mc146818.hh"
 #include "dev/io_device.hh"
 #include "params/TsunamiIO.hh"
@@ -69,138 +70,6 @@ class TsunamiIO : public BasicPioDevice
         }
     };
 
-    /** Programmable Interval Timer (Intel 8254) */
-    class PITimer
-    {
-        /** Counter element for PIT */
-        class Counter
-        {
-            /** Event for counter interrupt */
-            class CounterEvent : public Event
-            {
-              private:
-                /** Pointer back to Counter */
-                Counter* counter;
-                Tick interval;
-
-              public:
-                CounterEvent(Counter*);
-
-                /** Event process */
-                virtual void process();
-
-                /** Event description */
-                virtual const char *description() const;
-
-                friend class Counter;
-            };
-
-          private:
-            std::string _name;
-            const std::string &name() const { return _name; }
-
-            CounterEvent event;
-
-            /** Current count value */
-            uint16_t count;
-
-            /** Latched count */
-            uint16_t latched_count;
-
-            /** Interrupt period */
-            uint16_t period;
-
-            /** Current mode of operation */
-            uint8_t mode;
-
-            /** Output goes high when the counter reaches zero */
-            bool output_high;
-
-            /** State of the count latch */
-            bool latch_on;
-
-            /** Set of values for read_byte and write_byte */
-            enum {LSB, MSB};
-
-            /** Determine which byte of a 16-bit count value to read/write */
-            uint8_t read_byte, write_byte;
-
-          public:
-            Counter(const std::string &name);
-
-            /** Latch the current count (if one is not already latched) */
-            void latchCount();
-
-            /** Set the read/write mode */
-            void setRW(int rw_val);
-
-            /** Set operational mode */
-            void setMode(int mode_val);
-
-            /** Set count encoding */
-            void setBCD(int bcd_val);
-
-            /** Read a count byte */
-            uint8_t read();
-
-            /** Write a count byte */
-            void write(const uint8_t data);
-
-            /** Is the output high? */
-            bool outputHigh();
-
-            /**
-             * Serialize this object to the given output stream.
-             * @param base The base name of the counter object.
-             * @param os   The stream to serialize to.
-             */
-            void serialize(const std::string &base, std::ostream &os);
-
-            /**
-             * Reconstruct the state of this object from a checkpoint.
-             * @param base The base name of the counter object.
-             * @param cp The checkpoint use.
-             * @param section The section name of this object
-             */
-            void unserialize(const std::string &base, Checkpoint *cp,
-                             const std::string &section);
-        };
-
-      private:
-        std::string _name;
-        const std::string &name() const { return _name; }
-
-        /** PIT has three seperate counters */
-        Counter *counter[3];
-
-      public:
-        /** Public way to access individual counters (avoid array accesses) */
-        Counter counter0;
-        Counter counter1;
-        Counter counter2;
-
-        PITimer(const std::string &name);
-
-        /** Write control word */
-        void writeControl(const uint8_t data);
-
-        /**
-         * Serialize this object to the given output stream.
-         * @param base The base name of the counter object.
-         * @param os The stream to serialize to.
-         */
-        void serialize(const std::string &base, std::ostream &os);
-
-        /**
-         * Reconstruct the state of this object from a checkpoint.
-         * @param base The base name of the counter object.
-         * @param cp The checkpoint use.
-         * @param section The section name of this object
-         */
-        void unserialize(const std::string &base, Checkpoint *cp,
-                         const std::string &section);
-    };
-
     /** Mask of the PIC1 */
     uint8_t mask1;
 
@@ -223,7 +92,7 @@ class TsunamiIO : public BasicPioDevice
     Tsunami *tsunami;
 
     /** Intel 8253 Periodic Interval Timer */
-    PITimer pitimer;
+    Intel8254Timer pitimer;
 
     TsunamiRTC rtc;