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New divide interface

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date	2004.10.05.22.51.00;	author rmoore1;	state Exp;
This commit is contained in:
aystarik 2005-06-29 16:58:53 +00:00
parent a99188fe19
commit ff2347c12f
1 changed files with 9 additions and 12 deletions
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21
source/components/hardware/hwtimer.c
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@ -2,7 +2,7 @@
/******************************************************************************
*
* Name: hwtimer.c - ACPI Power Management Timer Interface
* $Revision: 1.27 $
* $Revision: 1.28 $
*
*****************************************************************************/
@ -226,10 +226,9 @@ AcpiGetTimerDuration (
UINT32 EndTicks,
UINT32 *TimeElapsed)
{
UINT32 DeltaTicks = 0;
UINT64_OVERLAY NormalizedTicks;
ACPI_STATUS Status;
ACPI_INTEGER OutQuotient;
UINT32 DeltaTicks;
ACPI_INTEGER Quotient;
ACPI_FUNCTION_TRACE ("AcpiGetTimerDuration");
@ -242,7 +241,7 @@ AcpiGetTimerDuration (
/*
* Compute Tick Delta:
* Handle (max one) timer rollovers on 24- versus 32-bit timers.
* Handle (max one) timer rollovers on 24-bit versus 32-bit timers.
*/
if (StartTicks < EndTicks)
{
@ -263,23 +262,21 @@ AcpiGetTimerDuration (
DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks;
}
}
else
else /* StartTicks == EndTicks */
{
*TimeElapsed = 0;
return_ACPI_STATUS (AE_OK);
}
/*
* Compute Duration (Requires a 64-bit divide):
* Compute Duration (Requires a 64-bit multiply and divide):
*
* TimeElapsed = (DeltaTicks * 1000000) / PM_TIMER_FREQUENCY;
*/
NormalizedTicks.Full = ((UINT64) DeltaTicks) * 1000000;
Status = AcpiUtShortDivide (((UINT64) DeltaTicks) * 1000000,
PM_TIMER_FREQUENCY, &Quotient, NULL);
Status = AcpiUtShortDivide (&NormalizedTicks.Full, PM_TIMER_FREQUENCY,
&OutQuotient, NULL);
*TimeElapsed = (UINT32) OutQuotient;
*TimeElapsed = (UINT32) Quotient;
return_ACPI_STATUS (Status);
}