mirror of
https://github.com/reactos/reactos.git
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154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/*
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* PROJECT: ReactOS HAL
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: hal/halx86/apic/apictimer.c
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* PURPOSE: System Profiling
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* PROGRAMMERS: Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <hal.h>
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#define NDEBUG
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#include <debug.h>
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#include "apic.h"
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extern LARGE_INTEGER HalpCpuClockFrequency;
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/* HAL profiling variables */
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BOOLEAN HalIsProfiling = FALSE;
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ULONGLONG HalCurProfileInterval = 10000000;
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ULONGLONG HalMinProfileInterval = 1000;
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ULONGLONG HalMaxProfileInterval = 10000000;
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/* TIMER FUNCTIONS ************************************************************/
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VOID
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NTAPI
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ApicSetTimerInterval(ULONG MicroSeconds)
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{
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LVT_REGISTER LvtEntry;
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ULONGLONG TimerInterval;
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/* Calculate the Timer interval */
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TimerInterval = HalpCpuClockFrequency.QuadPart * MicroSeconds / 1000000;
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/* Set the count interval */
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ApicWrite(APIC_TICR, (ULONG)TimerInterval);
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/* Set to periodic */
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LvtEntry.Long = 0;
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LvtEntry.TimerMode = 1;
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LvtEntry.Vector = APIC_PROFILE_VECTOR;
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LvtEntry.Mask = 0;
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ApicWrite(APIC_TMRLVTR, LvtEntry.Long);
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}
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VOID
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NTAPI
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ApicInitializeTimer(ULONG Cpu)
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{
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/* Initialize the TSC */
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//HalpInitializeTsc();
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/* Set clock multiplier to 1 */
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ApicWrite(APIC_TDCR, TIMER_DV_DivideBy1);
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ApicSetTimerInterval(1000);
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// KeSetTimeIncrement
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}
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/* PUBLIC FUNCTIONS ***********************************************************/
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VOID
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NTAPI
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HalInitializeProfiling(VOID)
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{
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KeGetPcr()->HalReserved[HAL_PROFILING_INTERVAL] = HalCurProfileInterval;
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KeGetPcr()->HalReserved[HAL_PROFILING_MULTIPLIER] = 1; /* TODO: HACK */
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}
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VOID
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NTAPI
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HalStartProfileInterrupt(IN KPROFILE_SOURCE ProfileSource)
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{
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LVT_REGISTER LvtEntry;
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/* Only handle ProfileTime */
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if (ProfileSource == ProfileTime)
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{
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/* OK, we are profiling now */
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HalIsProfiling = TRUE;
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/* Set interrupt interval */
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ApicWrite(APIC_TICR, KeGetPcr()->HalReserved[HAL_PROFILING_INTERVAL]);
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/* Unmask it */
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LvtEntry.Long = 0;
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LvtEntry.TimerMode = 1;
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LvtEntry.Vector = APIC_PROFILE_VECTOR;
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LvtEntry.Mask = 0;
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ApicWrite(APIC_TMRLVTR, LvtEntry.Long);
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}
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}
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VOID
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NTAPI
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HalStopProfileInterrupt(IN KPROFILE_SOURCE ProfileSource)
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{
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LVT_REGISTER LvtEntry;
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/* Only handle ProfileTime */
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if (ProfileSource == ProfileTime)
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{
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/* We are not profiling */
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HalIsProfiling = FALSE;
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/* Mask interrupt */
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LvtEntry.Long = 0;
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LvtEntry.TimerMode = 1;
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LvtEntry.Vector = APIC_PROFILE_VECTOR;
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LvtEntry.Mask = 1;
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ApicWrite(APIC_TMRLVTR, LvtEntry.Long);
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}
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}
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ULONG_PTR
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NTAPI
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HalSetProfileInterval(IN ULONG_PTR Interval)
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{
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ULONGLONG TimerInterval;
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ULONGLONG FixedInterval;
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FixedInterval = (ULONGLONG)Interval;
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/* Check bounds */
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if (FixedInterval < HalMinProfileInterval)
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{
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FixedInterval = HalMinProfileInterval;
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}
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else if (FixedInterval > HalMaxProfileInterval)
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{
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FixedInterval = HalMaxProfileInterval;
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}
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/* Remember interval */
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HalCurProfileInterval = FixedInterval;
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/* Recalculate interval for APIC */
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TimerInterval = FixedInterval * KeGetPcr()->HalReserved[HAL_PROFILING_MULTIPLIER] / HalMaxProfileInterval;
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/* Remember recalculated interval in PCR */
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KeGetPcr()->HalReserved[HAL_PROFILING_INTERVAL] = (ULONG)TimerInterval;
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/* And set it */
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ApicWrite(APIC_TICR, (ULONG)TimerInterval);
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return Interval;
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}
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