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* Create a branch for USB experiments.

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svn path=/branches/usb-experiments/; revision=72629
This commit is contained in:
Amine Khaldi 2016-09-09 15:11:19 +00:00
parent 28d8ba0d3e
commit 0ee830d7a4
23049 changed files with 0 additions and 1313991 deletions
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117
hal/halx86/generic/profil.c Normal file
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/*
* PROJECT: ReactOS HAL
* LICENSE: GPL - See COPYING in the top level directory
* FILE: hal/halx86/generic/profil.c
* PURPOSE: System Profiling
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
* Eric Kohl
*/
/* INCLUDES ******************************************************************/
#include <hal.h>
#define NDEBUG
#include <debug.h>
/* GLOBALS *******************************************************************/
BOOLEAN HalpProfilingStopped = TRUE;
UCHAR HalpProfileRate = 8;
/* FUNCTIONS *****************************************************************/
/*
* @implemented
*/
VOID
NTAPI
HalStopProfileInterrupt(IN KPROFILE_SOURCE ProfileSource)
{
UCHAR StatusB;
UNREFERENCED_PARAMETER(ProfileSource);
/* Acquire the CMOS lock */
HalpAcquireCmosSpinLock();
/* Read Status Register B */
StatusB = HalpReadCmos(RTC_REGISTER_B);
/* Disable periodic interrupts */
StatusB = StatusB & ~RTC_REG_B_PI;
/* Write new value into Status Register B */
HalpWriteCmos(RTC_REGISTER_B, StatusB);
HalpProfilingStopped = TRUE;
/* Release the CMOS lock */
HalpReleaseCmosSpinLock();
}
/*
* @unimplemented
*/
VOID
NTAPI
HalStartProfileInterrupt(IN KPROFILE_SOURCE ProfileSource)
{
UCHAR StatusA, StatusB;
UNREFERENCED_PARAMETER(ProfileSource);
HalpProfilingStopped = FALSE;
/* Acquire the CMOS lock */
HalpAcquireCmosSpinLock();
/* Set the interval in Status Register A */
StatusA = HalpReadCmos(RTC_REGISTER_A);
StatusA = (StatusA & 0xF0) | HalpProfileRate;
HalpWriteCmos(RTC_REGISTER_A, StatusA);
/* Enable periodic interrupts in Status Register B */
StatusB = HalpReadCmos(RTC_REGISTER_B);
StatusB = StatusB | RTC_REG_B_PI;
HalpWriteCmos(RTC_REGISTER_B, StatusB);
/* Release the CMOS lock */
HalpReleaseCmosSpinLock();
}
/*
* @unimplemented
*/
ULONG_PTR
NTAPI
HalSetProfileInterval(IN ULONG_PTR Interval)
{
ULONG_PTR CurrentValue, NextValue;
UCHAR i;
/* Normalize interval. 122100 ns is the smallest supported */
Interval &= ~(1 << 31);
if (Interval < 1221)
Interval = 1221;
/* Highest rate value of 15 means 500 ms */
CurrentValue = 5000000;
for (i = 15; ; i--)
{
NextValue = (CurrentValue + 1) / 2;
if (Interval > CurrentValue - NextValue / 2)
break;
CurrentValue = NextValue;
}
/* Interval as needed by RTC */
HalpProfileRate = i;
/* Reset the */
if (!HalpProfilingStopped)
{
HalStartProfileInterrupt(0);
}
return CurrentValue;
}