X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86%2Ftime.c;h=49d515e4e5cd76966e8a1ffdfb0795ffda820738;hb=f73bf5f5cf0e188bafe905091aa311627af54b76;hp=3a13904f819d0776793194cee9f37f7c474166de;hpb=8bc40333b1401d7616b225945fee53d972c2f418;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86/time.c b/Kernel/arch/x86/time.c
index 3a13904f..49d515e4 100644
--- a/Kernel/arch/x86/time.c
+++ b/Kernel/arch/x86/time.c
@@ -3,21 +3,25 @@
  * Timekeeping
  * arch/x86/time.c
  */
-#include <common.h>
+#include <acess.h>
 
 // === MACROS ===
-#define TIMER_FREQ	1024	//Hz
+#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
+#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))
 
+// === IMPORTS ===
+extern Sint64	giTimestamp;
+extern Uint64	giTicks;
+extern Uint64	giPartMiliseconds;
+extern void	Timer_CallTimers(void);
+
 // === PROTOTYPES ===
 void	Time_Interrupt();
 
-// === GLOBALS ===
-Uint64	giTicks = 0;
-Sint64	giTimestamp = 0;
-Uint64	giPartMiliseconds = 0;
-
 // === CODE ===
 /**
  * \fn int Time_Setup()
@@ -30,6 +34,14 @@ int Time_Setup()
 	outb(0x70, inb(0x70)&0x7F);	// Disable NMIs
 	__asm__ __volatile__ ("cli");	// Disable normal interrupts
 	
+	// Set IRQ8 firing rate
+	outb(0x70, 0x0A);	// Set the index to register A
+	val = inb(0x71); // Get the current value of register A
+	outb(0x70, 0x0A); // Reset index to A
+	val &= 0xF0;
+	val |= TIMER_RATE;
+	outb(0x71, val);	// Update the timer rate
+		
 	// Enable IRQ8
 	outb(0x70, 0x0B);	// Set the index to register B
 	val = inb(0x71);	// Read the current value of register B
@@ -57,13 +69,29 @@ void Time_Interrupt()
 		giTimestamp ++;
 		giPartMiliseconds -= 0x80000000;
 	}
+	
+	Timer_CallTimers();
+
+	// Make sure the RTC Fires again
+	outb(0x70, 0x0C); // Select register C
+	inb(0x71);	// Just throw away contents.
 }
 
+#if 0
 /**
- * \fn Sint64 now()
- * \brief Return the current timestamp
+ * \fn void Time_TimerThread()
  */
-Sint64 now()
+void Time_TimerThread()
 {
-	return giTimestamp;
+	Sint64	next;
+	Threads_SetName("TIMER");
+	
+	next = giTimestamp + TIMER_QUANTUM;
+	for(;;)
+	{
+		while(giTimestamp < next)	Threads_Yield();
+		next = giTimestamp + TIMER_QUANTUM;	
+		Timer_CallTimers();
+	}
 }
+#endif