/** @file
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* Exception handling support specific for ARM
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*
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* Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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* Copyright (c) 2014 - 2021, Arm Limited. All rights reserved.<BR>
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* Copyright (c) 2016 HP Development Company, L.P.<BR>
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include <Uefi.h>
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#include <Chipset/ArmV7.h>
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#include <Library/ArmLib.h>
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#include <Protocol/DebugSupport.h> // for MAX_ARM_EXCEPTION
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UINTN gMaxExceptionNumber = MAX_ARM_EXCEPTION;
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EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_ARM_EXCEPTION + 1] = { 0 };
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EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_ARM_EXCEPTION + 1] = { 0 };
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PHYSICAL_ADDRESS gExceptionVectorAlignmentMask = ARM_VECTOR_TABLE_ALIGNMENT;
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// Exception handler contains branch to vector location (jmp $) so no handler
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// NOTE: This code assumes vectors are ARM and not Thumb code
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UINTN gDebuggerNoHandlerValue = 0xEAFFFFFE;
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RETURN_STATUS
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ArchVectorConfig (
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IN UINTN VectorBaseAddress
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)
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{
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// if the vector address corresponds to high vectors
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if (VectorBaseAddress == 0xFFFF0000) {
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// set SCTLR.V to enable high vectors
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ArmSetHighVectors();
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}
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else {
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// Set SCTLR.V to 0 to enable VBAR to be used
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ArmSetLowVectors();
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}
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return RETURN_SUCCESS;
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}
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