| be46cd5f |
1 | /** @file\r |
| 2 | Set a IDT entry for debug purpose\r |
| 3 | \r |
| 4 | Set a IDT entry for interrupt vector 3 for debug purpose for x64 platform\r |
| 5 | \r |
| 6 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
| 7 | \r |
| 8 | This program and the accompanying materials\r |
| 9 | are licensed and made available under the terms and conditions of the BSD License\r |
| 10 | which accompanies this distribution. The full text of the license may be found at\r |
| 11 | http://opensource.org/licenses/bsd-license.php\r |
| 12 | \r |
| 13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 15 | \r |
| 16 | **/\r |
| 17 | #include "ScriptExecute.h"\r |
| 18 | //\r |
| 19 | // INTERRUPT_GATE_DESCRIPTOR and SetIdtEntry () are used to setup IDT to do debug\r |
| 20 | //\r |
| 21 | \r |
| 22 | #pragma pack(1)\r |
| 23 | \r |
| 24 | typedef struct {\r |
| 25 | UINT16 Offset15To0;\r |
| 26 | UINT16 SegmentSelector;\r |
| 27 | UINT16 Attributes;\r |
| 28 | UINT16 Offset31To16;\r |
| 29 | UINT32 Offset63To32;\r |
| 30 | UINT32 Reserved;\r |
| 31 | } INTERRUPT_GATE_DESCRIPTOR;\r |
| 32 | \r |
| 33 | #define INTERRUPT_GATE_ATTRIBUTE 0x8e00\r |
| 34 | \r |
| 35 | #pragma pack()\r |
| 36 | /**\r |
| 37 | Set a IDT entry for interrupt vector 3 for debug purpose.\r |
| 38 | \r |
| 39 | @param AcpiS3Context a pointer to a structure of ACPI_S3_CONTEXT\r |
| 40 | \r |
| 41 | **/\r |
| 42 | VOID\r |
| 43 | SetIdtEntry (\r |
| 44 | IN ACPI_S3_CONTEXT *AcpiS3Context\r |
| 45 | )\r |
| 46 | {\r |
| 47 | INTERRUPT_GATE_DESCRIPTOR *IdtEntry;\r |
| 48 | IA32_DESCRIPTOR *IdtDescriptor;\r |
| 49 | UINTN S3DebugBuffer;\r |
| 50 | \r |
| 51 | //\r |
| 52 | // Restore IDT for debug\r |
| 53 | //\r |
| 54 | IdtDescriptor = (IA32_DESCRIPTOR *) (UINTN) (AcpiS3Context->IdtrProfile);\r |
| 55 | IdtEntry = (INTERRUPT_GATE_DESCRIPTOR *)(IdtDescriptor->Base + (3 * sizeof (INTERRUPT_GATE_DESCRIPTOR)));\r |
| 56 | S3DebugBuffer = (UINTN) (AcpiS3Context->S3DebugBufferAddress);\r |
| 57 | \r |
| 58 | IdtEntry->Offset15To0 = (UINT16)S3DebugBuffer;\r |
| 59 | IdtEntry->SegmentSelector = (UINT16)AsmReadCs ();;\r |
| 60 | IdtEntry->Attributes = (UINT16)INTERRUPT_GATE_ATTRIBUTE;\r |
| 61 | IdtEntry->Offset31To16 = (UINT16)(S3DebugBuffer >> 16);\r |
| 62 | IdtEntry->Offset63To32 = (UINT32)(S3DebugBuffer >> 32);\r |
| 63 | IdtEntry->Reserved = 0;\r |
| 64 | \r |
| 65 | AsmWriteIdtr (IdtDescriptor);\r |
| 66 | }\r |
| 67 | \r |
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