UINT32
AcpiEvInstallSciHandler (
void)
{
UINT32 Status = AE_OK;
ACPI_FUNCTION_TRACE (EvInstallSciHandler);
Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEvGetGpeXruptBlock (
UINT32 InterruptNumber,
ACPI_GPE_XRUPT_INFO **GpeXruptBlock)
{
ACPI_GPE_XRUPT_INFO *NextGpeXrupt;
ACPI_GPE_XRUPT_INFO *GpeXrupt;
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock);
/* No need for lock since we are not changing any list elements here */
NextGpeXrupt = AcpiGbl_GpeXruptListHead;
while (NextGpeXrupt)
{
if (NextGpeXrupt->InterruptNumber == InterruptNumber)
{
*GpeXruptBlock = NextGpeXrupt;
return_ACPI_STATUS (AE_OK);
}
NextGpeXrupt = NextGpeXrupt->Next;
}
/* Not found, must allocate a new xrupt descriptor */
GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO));
if (!GpeXrupt)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
GpeXrupt->InterruptNumber = InterruptNumber;
/* Install new interrupt descriptor with spin lock */
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
if (AcpiGbl_GpeXruptListHead)
{
NextGpeXrupt = AcpiGbl_GpeXruptListHead;
while (NextGpeXrupt->Next)
{
NextGpeXrupt = NextGpeXrupt->Next;
}
NextGpeXrupt->Next = GpeXrupt;
GpeXrupt->Previous = NextGpeXrupt;
}
else
{
AcpiGbl_GpeXruptListHead = GpeXrupt;
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
/* Install new interrupt handler if not SCI_INT */
if (InterruptNumber != AcpiGbl_FADT.SciInterrupt)
{
Status = AcpiOsInstallInterruptHandler (InterruptNumber,
AcpiEvGpeXruptHandler, GpeXrupt);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not install GPE interrupt handler at level 0x%X",
InterruptNumber));
return_ACPI_STATUS (Status);
}
}
*GpeXruptBlock = GpeXrupt;
return_ACPI_STATUS (AE_OK);
}
