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[HAL]

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- Stub support for future timer latency watchdog.
- Change older-style comments to standard ReactOS commenting style.

svn path=/trunk/; revision=48731
This commit is contained in:
Aleksey Bragin
2010-09-10 13:15:51 +00:00
parent b84512b555
commit cacc80ae3e
2 changed files with 16 additions and 22 deletions
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reactos/hal/halx86/generic/i386/systimer.S
+3 -3
View File
@@ -20,9 +20,6 @@ _HalpPerfCounterLow: .long 0
_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 @@ LoopPostInt:
/* 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
reactos/hal/halx86/generic/timer.c
+13 -19
View File
@@ -14,6 +14,7 @@
/* GLOBALS *******************************************************************/
ULONG HalpPerfCounterCutoff;
BOOLEAN HalpClockSetMSRate;
ULONG HalpCurrentTimeIncrement;
ULONG HalpCurrentRollOver;
@@ -71,34 +72,26 @@ HalpInitializeClock(VOID)
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 @@ HalpClockInterruptHandler(IN PKTRAP_FRAME TrapFrame)
{
/* Update the performance counter */
HalpPerfCounter.QuadPart += HalpCurrentRollOver;
HalpPerfCounterCutoff = KiEnableTimerWatchdog;
/* Check if someone changed the time rate */
if (HalpClockSetMSRate)