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/** @file
* Exception Handling support specific for AArch64
*
* Copyright (c) 2016 HP Development Company, L.P.
*
* 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 <Uefi.h>
#include <Chipset/AArch64.h>
#include <Protocol/DebugSupport.h> // for MAX_AARCH64_EXCEPTION
UINTN gMaxExceptionNumber = MAX_AARCH64_EXCEPTION;
EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_AARCH64_EXCEPTION + 1] = { 0 };
EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_AARCH64_EXCEPTION + 1] = { 0 };
PHYSICAL_ADDRESS gExceptionVectorAlignmentMask = ARM_VECTOR_TABLE_ALIGNMENT;
UINTN gDebuggerNoHandlerValue = 0; // todo: define for AArch64
RETURN_STATUS ArchVectorConfig(
IN UINTN VectorBaseAddress
)
{
UINTN HcrReg;
if (ArmReadCurrentEL() == AARCH64_EL2) {
HcrReg = ArmReadHcr();
// Trap General Exceptions. All exceptions that would be routed to EL1 are routed to EL2
HcrReg |= ARM_HCR_TGE;
ArmWriteHcr(HcrReg);
}
return RETURN_SUCCESS;
}
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