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/** @file
* Exception handling support specific for ARM
*
* Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
* Copyright (c) 2014 - 2021, Arm Limited. All rights reserved.<BR>
* Copyright (c) 2016 HP Development Company, L.P.<BR>
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/
#include <Uefi.h>
#include <Arm/AArch32.h>
#include <Library/ArmLib.h>
#include <Protocol/DebugSupport.h> // for MAX_ARM_EXCEPTION
UINTN gMaxExceptionNumber = MAX_ARM_EXCEPTION;
EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_ARM_EXCEPTION + 1] = { 0 };
EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_ARM_EXCEPTION + 1] = { 0 };
PHYSICAL_ADDRESS gExceptionVectorAlignmentMask = ARM_VECTOR_TABLE_ALIGNMENT;
// Exception handler contains branch to vector location (jmp $) so no handler
// NOTE: This code assumes vectors are ARM and not Thumb code
UINTN gDebuggerNoHandlerValue = 0xEAFFFFFE;
RETURN_STATUS
ArchVectorConfig (
IN UINTN VectorBaseAddress
)
{
// if the vector address corresponds to high vectors
if (VectorBaseAddress == 0xFFFF0000) {
// set SCTLR.V to enable high vectors
ArmSetHighVectors ();
} else {
// Set SCTLR.V to 0 to enable VBAR to be used
ArmSetLowVectors ();
}
return RETURN_SUCCESS;
}
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