ArmPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / ArmPkg / Library / ArmExceptionLib / Arm / ArmException.c

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