// === MACROS ===
#define TIMER_QUANTUM 100
// 2^(15-rate), 15: 1HZ, 5: 1024Hz, 2: 8192Hz
-#define TIMER_RATE 12 // (Max: 15, Min: 2) - 15 = 1Hz, 13 = 4Hz, 12 = 8Hz, 11 = 16Hz 10 = 32Hz, 2
+// (Max: 15, Min: 2) - 15 = 1Hz, 13 = 4Hz, 12 = 8Hz, 11 = 16Hz 10 = 32Hz, 2 = 8192Hz
+#define TIMER_RATE 12
+//#define TIMER_RATE 15
#define TIMER_FREQ (0x8000>>TIMER_RATE) //Hz
#define MS_PER_TICK_WHOLE (1000/(TIMER_FREQ))
-#define MS_PER_TICK_FRACT ((Uint64)(1000*TIMER_FREQ-((Uint64)MS_PER_TICK_WHOLE)*0x80000000/TIMER_FREQ))
+#define MS_PER_TICK_FRACT ((0x80000000*(1000%TIMER_FREQ))/TIMER_FREQ)
// === IMPORTS ===
extern Sint64 giTimestamp;
extern void Timer_CallTimers(void);
// === PROTOTYPES ===
-void Time_Interrupt();
+void Time_Interrupt(int);
// === CODE ===
/**
- * \fn int Time_Setup()
+ * \fn int Time_Setup(void)
* \brief Sets the system time from the Realtime-Clock
*/
-int Time_Setup()
+int Time_Setup(void)
{
Uint8 val;
+ Log_Log("Timer", "RTC Timer firing at %iHz (%i divisor), %i.0x%08x",
+ TIMER_FREQ, TIMER_RATE, MS_PER_TICK_WHOLE, MS_PER_TICK_FRACT);
+
outb(0x70, inb(0x70)&0x7F); // Disable NMIs
__asm__ __volatile__ ("cli"); // Disable normal interrupts
outb(0x70, 0x0B); // Set the index again (a read will reset the index to register D)
outb(0x71, val | 0x40); // Write the previous value or'd with 0x40. This turns on bit 6 of register D
- __asm__ __volatile__ ("sti"); // Disable normal interrupts
- outb(0x70, inb(0x70)|0x80); // Disable NMIs
+ __asm__ __volatile__ ("sti"); // Re-enable normal interrupts
+ outb(0x70, inb(0x70)|0x80); // Re-enable NMIs
// Install IRQ Handler
IRQ_AddHandler(8, Time_Interrupt);
+
+ // Make sure the RTC actually fires
+ outb(0x70, 0x0C); // Select register C
+ inb(0x71); // Just throw away contents.
+
return 0;
}
/**
- * \fn void Time_Interrupt()
* \brief Called on the timekeeping IRQ
+ * \param irq IRQ number (unused)
*/
-void Time_Interrupt()
+void Time_Interrupt(int irq)
{
+ //Log("RTC Tick");
+
giTicks ++;
giTimestamp += MS_PER_TICK_WHOLE;
giPartMiliseconds += MS_PER_TICK_FRACT;
#if 0
/**
- * \fn void Time_TimerThread()
+ * \fn void Time_TimerThread(void)
*/
-void Time_TimerThread()
+void Time_TimerThread(void)
{
Sint64 next;
Threads_SetName("TIMER");