projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 2939c778 EC |
1 | /** @file\r |
| 2 | * Exception Handling support specific for AArch64\r | |
| 3 | *\r | |
| 4 | * Copyright (c) 2016 HP Development Company, L.P.\r | |
| 5 | *\r | |
| 6 | * This program and the accompanying materials\r | |
| 7 | * are licensed and made available under the terms and conditions of the BSD License\r | |
| 8 | * which accompanies this distribution. The full text of the license may be found at\r | |
| 9 | * http://opensource.org/licenses/bsd-license.php\r | |
| 10 | *\r | |
| 11 | * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 12 | * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 13 | *\r | |
| 14 | **/\r | |
| 15 | \r | |
| 16 | #include <Uefi.h>\r | |
| 17 | \r | |
| 18 | #include <Chipset/AArch64.h>\r | |
| 2d120489 | 19 | #include <Library/MemoryAllocationLib.h>\r |
| 2939c778 EC |
20 | #include <Protocol/DebugSupport.h> // for MAX_AARCH64_EXCEPTION\r |
| 21 | \r | |
| 22 | UINTN gMaxExceptionNumber = MAX_AARCH64_EXCEPTION;\r | |
| 23 | EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_AARCH64_EXCEPTION + 1] = { 0 };\r | |
| 24 | EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_AARCH64_EXCEPTION + 1] = { 0 };\r | |
| 25 | PHYSICAL_ADDRESS gExceptionVectorAlignmentMask = ARM_VECTOR_TABLE_ALIGNMENT;\r | |
| 26 | UINTN gDebuggerNoHandlerValue = 0; // todo: define for AArch64\r | |
| 27 | \r | |
| 2d120489 AB |
28 | #define EL0_STACK_PAGES 2\r |
| 29 | \r | |
| 30 | VOID\r | |
| 31 | RegisterEl0Stack (\r | |
| 32 | IN VOID *Stack\r | |
| 33 | );\r | |
| 34 | \r | |
| 2939c778 EC |
35 | RETURN_STATUS ArchVectorConfig(\r |
| 36 | IN UINTN VectorBaseAddress\r | |
| 37 | )\r | |
| 38 | {\r | |
| 39 | UINTN HcrReg;\r | |
| 2d120489 AB |
40 | UINT8 *Stack;\r |
| 41 | \r | |
| 42 | Stack = AllocatePages (EL0_STACK_PAGES);\r | |
| 43 | if (Stack == NULL) {\r | |
| 44 | return RETURN_OUT_OF_RESOURCES;\r | |
| 45 | }\r | |
| 46 | \r | |
| 47 | RegisterEl0Stack ((UINT8 *)Stack + EFI_PAGES_TO_SIZE (EL0_STACK_PAGES));\r | |
| 2939c778 EC |
48 | \r |
| 49 | if (ArmReadCurrentEL() == AARCH64_EL2) {\r | |
| 50 | HcrReg = ArmReadHcr();\r | |
| 51 | \r | |
| 52 | // Trap General Exceptions. All exceptions that would be routed to EL1 are routed to EL2\r | |
| 53 | HcrReg |= ARM_HCR_TGE;\r | |
| 54 | \r | |
| 55 | ArmWriteHcr(HcrReg);\r | |
| 56 | }\r | |
| 57 | \r | |
| 58 | return RETURN_SUCCESS;\r | |
| 59 | }\r |