/** @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 <Chipset/ArmV7.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; | |
} |