1 /** @file 2 * Exception Handling support specific for AArch64 3 * 4 * Copyright (c) 2016 HP Development Company, L.P. 5 * 6 * This program and the accompanying materials 7 * are licensed and made available under the terms and conditions of the BSD License 8 * which accompanies this distribution. The full text of the license may be found at 9 * http://opensource.org/licenses/bsd-license.php 10 * 11 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 * 14 **/ 15 16 #include <Uefi.h> 17 18 #include <Chipset/AArch64.h> 19 20 #include <Protocol/DebugSupport.h> // for MAX_AARCH64_EXCEPTION 21 22 UINTN gMaxExceptionNumber = MAX_AARCH64_EXCEPTION; 23 EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_AARCH64_EXCEPTION + 1] = { 0 }; 24 EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_AARCH64_EXCEPTION + 1] = { 0 }; 25 PHYSICAL_ADDRESS gExceptionVectorAlignmentMask = ARM_VECTOR_TABLE_ALIGNMENT; 26 UINTN gDebuggerNoHandlerValue = 0; // todo: define for AArch64 27 28 RETURN_STATUS ArchVectorConfig( 29 IN UINTN VectorBaseAddress 30 ) 31 { 32 UINTN HcrReg; 33 34 if (ArmReadCurrentEL() == AARCH64_EL2) { 35 HcrReg = ArmReadHcr(); 36 37 // Trap General Exceptions. All exceptions that would be routed to EL1 are routed to EL2 38 HcrReg |= ARM_HCR_TGE; 39 40 ArmWriteHcr(HcrReg); 41 } 42 43 return RETURN_SUCCESS; 44 } 45
