134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/**
|
|
* PROJECT: ExectOS
|
|
* COPYRIGHT: See COPYING.md in the top level directory
|
|
* FILE: xtoskrnl/hl/i686/runlevel.c
|
|
* DESCRIPTION: Run Level management support for i686 architecture
|
|
* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
|
|
*/
|
|
|
|
#include <xtos.h>
|
|
|
|
|
|
/**
|
|
* Gets the current run level from APIC for the current processor.
|
|
*
|
|
* @return This routine returns the current run level.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTFASTCALL
|
|
KRUNLEVEL
|
|
HlGetRunLevel(VOID)
|
|
{
|
|
return HlpTransformApicTprToRunLevel(HlReadApicRegister(APIC_TPR));
|
|
}
|
|
|
|
/**
|
|
* Sets new run level for the current processor.
|
|
*
|
|
* @param RunLevel
|
|
* Supplies the new run level to store into APIC.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTFASTCALL
|
|
VOID
|
|
HlSetRunLevel(IN KRUNLEVEL RunLevel)
|
|
{
|
|
HlWriteApicRegister(APIC_TPR, HlpTransformRunLevelToApicTpr(RunLevel));
|
|
}
|
|
|
|
/**
|
|
* Maps APIC interrupt vector to XT run level.
|
|
*
|
|
* @param Tpr
|
|
* Supplies the interrupt vector rad from APIC Task Priority Register.
|
|
*
|
|
* @return This routine returns the XT run level corresponding to the specified APIC interrupt vector.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTFASTCALL
|
|
KRUNLEVEL
|
|
HlpTransformApicTprToRunLevel(IN UCHAR Tpr)
|
|
{
|
|
STATIC KRUNLEVEL TransformationTable[16] =
|
|
{
|
|
PASSIVE_LEVEL,
|
|
PASSIVE_LEVEL,
|
|
PASSIVE_LEVEL,
|
|
APC_LEVEL,
|
|
DISPATCH_LEVEL,
|
|
DEVICE1_LEVEL,
|
|
DEVICE2_LEVEL,
|
|
DEVICE3_LEVEL,
|
|
DEVICE4_LEVEL,
|
|
DEVICE5_LEVEL,
|
|
DEVICE6_LEVEL,
|
|
DEVICE7_LEVEL,
|
|
PROFILE_LEVEL,
|
|
CLOCK_LEVEL,
|
|
IPI_LEVEL,
|
|
HIGH_LEVEL
|
|
};
|
|
|
|
/* Return the run level corresponding to the TPR from the transformation table. */
|
|
return TransformationTable[Tpr / 16];
|
|
}
|
|
|
|
/**
|
|
* Maps XT run level to interrupt vector suitable for the APIC Task Priority Register.
|
|
*
|
|
* @param RunLevel
|
|
* Supplies the XT run level.
|
|
*
|
|
* @return This routine returns the APIC interrupt vector corresponding to the specified XT run level.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTFASTCALL
|
|
UCHAR
|
|
HlpTransformRunLevelToApicTpr(IN KRUNLEVEL RunLevel)
|
|
{
|
|
STATIC UCHAR TransformationTable[32] =
|
|
{
|
|
APIC_VECTOR_ZERO,
|
|
APIC_VECTOR_APC,
|
|
APIC_VECTOR_DPC,
|
|
APIC_VECTOR_DPC,
|
|
APIC_VECTOR_DEVICE1,
|
|
APIC_VECTOR_DEVICE2,
|
|
APIC_VECTOR_DEVICE3,
|
|
APIC_VECTOR_DEVICE4,
|
|
APIC_VECTOR_DEVICE5,
|
|
APIC_VECTOR_DEVICE6,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_DEVICE7,
|
|
APIC_VECTOR_GENERIC,
|
|
APIC_VECTOR_CLOCK,
|
|
APIC_VECTOR_IPI,
|
|
APIC_VECTOR_POWERFAIL,
|
|
APIC_VECTOR_NMI
|
|
};
|
|
|
|
/* Return the TPR corresponding to the run level from the transformation table. */
|
|
return TransformationTable[RunLevel];
|
|
}
|