[fireball] 48731: [HAL] - Stub support for future timer latency watchdog. - Change older-style comments to standard ReactOS commenting style.

Author: fireball
Date: Fri Sep 10 13:15:51 2010
New Revision: 48731

URL: http://svn.reactos.org/svn/reactos?rev=48731&view=rev
Log:
[HAL]
- Stub support for future timer latency watchdog.
- Change older-style comments to standard ReactOS commenting style.

Modified:
    trunk/reactos/hal/halx86/generic/i386/systimer.S
    trunk/reactos/hal/halx86/generic/timer.c

Modified: trunk/reactos/hal/halx86/generic/i386/systimer.S
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/hal/halx86/generic/i386/sys...
==============================================================================
--- trunk/reactos/hal/halx86/generic/i386/systimer.S [iso-8859-1] (original)
+++ trunk/reactos/hal/halx86/generic/i386/systimer.S [iso-8859-1] Fri Sep 10 13:15:51 2010
@@ -20,9 +20,6 @@
 _HalpPerfCounterHigh:       .long 0
 _HalpSystemHardwareFlags:   .long 0

-_UnhandledMsg:
-    .asciz "\n\x7\x7!!! Unhandled or Unexpected Code at line: %lx!!!\n"
-
 /* FUNCTIONS *****************************************************************/

.global _HalpCalibrateStallExecution@0
@@ -389,6 +386,9 @@
     /* Read 8254 timer */
     mov al, 0
     out 0x43, al
+    in al, 0x92
+    or al, _HalpPerfCounterCutoff
+    out 0x92, al
     jmp $+2
     in al, 0x40
     jmp $+2

Modified: trunk/reactos/hal/halx86/generic/timer.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/hal/halx86/generic/timer.c?...
==============================================================================
--- trunk/reactos/hal/halx86/generic/timer.c [iso-8859-1] (original)
+++ trunk/reactos/hal/halx86/generic/timer.c [iso-8859-1] Fri Sep 10 13:15:51 2010
@@ -14,6 +14,7 @@

/* GLOBALS *******************************************************************/

+ULONG HalpPerfCounterCutoff;
 BOOLEAN HalpClockSetMSRate;
 ULONG HalpCurrentTimeIncrement;
 ULONG HalpCurrentRollOver;
@@ -71,34 +72,26 @@
     Flags = __readeflags();
     _disable();

-    //
-    // Program the PIT for binary mode
-    //
+    /* Program the PIT for binary mode */
     TimerControl.BcdMode = FALSE;

-    //
-    // Program the PIT to generate a normal rate wave (Mode 3) on channel 0.
-    // Channel 0 is used for the IRQ0 clock interval timer, and channel
-    // 1 is used for DRAM refresh.
-    //
-    // Mode 2 gives much better accuracy than Mode 3.
-    //
+    /*
+     * Program the PIT to generate a normal rate wave (Mode 3) on channel 0.
+     * Channel 0 is used for the IRQ0 clock interval timer, and channel
+     * 1 is used for DRAM refresh.
+     *
+     * Mode 2 gives much better accuracy than Mode 3.
+     */
     TimerControl.OperatingMode = PitOperatingMode2;
     TimerControl.Channel = PitChannel0;

-    //
-    // Set the access mode that we'll use to program the reload value.
-    //
+    /* Set the access mode that we'll use to program the reload value */
     TimerControl.AccessMode = PitAccessModeLowHigh;

-    //
-    // Now write the programming bits
-    //
+    /* Now write the programming bits */
     __outbyte(TIMER_CONTROL_PORT, TimerControl.Bits);

-    //
-    // Next we write the reload value for channel 0
-    //
+    /* Next we write the reload value for channel 0 */
     __outbyte(TIMER_CHANNEL0_DATA_PORT, RollOver & 0xFF);
     __outbyte(TIMER_CHANNEL0_DATA_PORT, RollOver >> 8);

@@ -125,6 +118,7 @@
     {
         /* Update the performance counter */
         HalpPerfCounter.QuadPart += HalpCurrentRollOver;
+        HalpPerfCounterCutoff = KiEnableTimerWatchdog;

/* Check if someone changed the time rate */
         if (HalpClockSetMSRate)