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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 |