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/*++
Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
--*/
#include "ArmGicDxe.h"
VOID
EFIAPI
IrqInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_SYSTEM_CONTEXT SystemContext
);
VOID
EFIAPI
ExitBootServicesEvent (
IN EFI_EVENT Event,
IN VOID *Context
);
//
// Making this global saves a few bytes in image size
//
EFI_HANDLE gHardwareInterruptHandle = NULL;
//
// Notifications
//
EFI_EVENT EfiExitBootServicesEvent = (EFI_EVENT)NULL;
// Maximum Number of Interrupts
UINTN mGicNumInterrupts = 0;
HARDWARE_INTERRUPT_HANDLER *gRegisteredInterruptHandlers = NULL;
EFI_STATUS
InstallAndRegisterInterruptService (
IN EFI_HARDWARE_INTERRUPT_PROTOCOL *InterruptProtocol,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler,
IN EFI_EVENT_NOTIFY ExitBootServicesEvent
)
{
EFI_STATUS Status;
EFI_CPU_ARCH_PROTOCOL *Cpu;
// Initialize the array for the Interrupt Handlers
gRegisteredInterruptHandlers = (HARDWARE_INTERRUPT_HANDLER*)AllocateZeroPool (sizeof(HARDWARE_INTERRUPT_HANDLER) * mGicNumInterrupts);
if (gRegisteredInterruptHandlers == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gBS->InstallMultipleProtocolInterfaces (
&gHardwareInterruptHandle,
&gHardwareInterruptProtocolGuid, InterruptProtocol,
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get the CPU protocol that this driver requires.
//
Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&Cpu);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Unregister the default exception handler.
//
Status = Cpu->RegisterInterruptHandler (Cpu, ARM_ARCH_EXCEPTION_IRQ, NULL);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Register to receive interrupts
//
Status = Cpu->RegisterInterruptHandler (Cpu, ARM_ARCH_EXCEPTION_IRQ, InterruptHandler);
if (EFI_ERROR (Status)) {
return Status;
}
// Register for an ExitBootServicesEvent
Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_NOTIFY, ExitBootServicesEvent, NULL, &EfiExitBootServicesEvent);
return Status;
}
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