/**
EFI_CPU_INTERRUPT_HANDLER that is called when a processor interrupt occurs.
@param InterruptType Defines the type of interrupt or exception that
occurred on the processor.This parameter is processor architecture specific.
@param SystemContext A pointer to the processor context when
the interrupt occurred on the processor.
@return None
**/
VOID
EFIAPI
IrqInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
UINT32 Vector;
HARDWARE_INTERRUPT_HANDLER InterruptHandler;
Vector = MmioRead32 (INTCPS_SIR_IRQ) & INTCPS_SIR_IRQ_MASK;
// Needed to prevent infinite nesting when Time Driver lowers TPL
MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
ArmDataSyncronizationBarrier ();
InterruptHandler = gRegisteredInterruptHandlers[Vector];
if (InterruptHandler != NULL) {
// Call the registered interrupt handler.
InterruptHandler (Vector, SystemContext);
}
// Needed to clear after running the handler
MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
ArmDataSyncronizationBarrier ();
}
/**
Signal to the hardware that the End Of Intrrupt state
has been reached.
@param This Instance pointer for this protocol
@param Source Hardware source of the interrupt
@retval EFI_SUCCESS Source interrupt EOI'ed.
@retval EFI_DEVICE_ERROR Hardware could not be programmed.
**/
EFI_STATUS
EFIAPI
EndOfInterrupt (
IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
IN HARDWARE_INTERRUPT_SOURCE Source
)
{
MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
ArmDataSyncronizationBarrier ();
return EFI_SUCCESS;
}
/**
Initialize controllers that must setup at the early stage
Some peripherals must be initialized in Secure World.
For example, some L2x0 requires to be initialized in Secure World
**/
VOID
ArmPlatformNormalInitialize (
VOID
)
{
BEAGLEBOARD_REVISION Revision;
Revision = BeagleBoardGetRevision();
// Set up Pin muxing.
PadConfiguration (Revision);
// Set up system clocking
ClockInit ();
// Turn off the functional clock for Timer 3
MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
ArmDataSyncronizationBarrier ();
// Clear IRQs
MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
ArmDataSyncronizationBarrier ();
}
/**
Perform End Of Interrupt for the debug agent timer. This is called in the
interrupt handler after the interrupt has been processed.
**/
VOID
EFIAPI
DebugAgentTimerEndOfInterrupt (
VOID
)
{
// Clear all timer interrupts
MmioWrite32 (gTISR, TISR_CLEAR_ALL);
// Poll interrupt status bits to ensure clearing
while ((MmioRead32 (gTISR) & TISR_ALL_INTERRUPT_MASK) != TISR_NO_INTERRUPTS_PENDING);
MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWFIQAGR);
ArmDataSyncronizationBarrier ();
}
