projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| b303605e MK |
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 IA32 platform\r | |
| 5 | \r | |
| 6 | Copyright (c) 2013-2015 Intel Corporation.\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 OffsetLow;\r | |
| 26 | UINT16 SegmentSelector;\r | |
| 27 | UINT16 Attributes;\r | |
| 28 | UINT16 OffsetHigh;\r | |
| 29 | } INTERRUPT_GATE_DESCRIPTOR;\r | |
| 30 | \r | |
| 31 | #define INTERRUPT_GATE_ATTRIBUTE 0x8e00\r | |
| 32 | \r | |
| 33 | #pragma pack()\r | |
| 34 | /**\r | |
| 35 | Set a IDT entry for interrupt vector 3 for debug purpose.\r | |
| 36 | \r | |
| 37 | @param AcpiS3Context a pointer to a structure of ACPI_S3_CONTEXT\r | |
| 38 | \r | |
| 39 | **/\r | |
| 40 | VOID\r | |
| 41 | SetIdtEntry (\r | |
| 42 | IN ACPI_S3_CONTEXT *AcpiS3Context\r | |
| 43 | )\r | |
| 44 | {\r | |
| 45 | INTERRUPT_GATE_DESCRIPTOR *IdtEntry;\r | |
| 46 | IA32_DESCRIPTOR *IdtDescriptor;\r | |
| 47 | UINTN S3DebugBuffer;\r | |
| 48 | \r | |
| 49 | //\r | |
| 50 | // Restore IDT for debug\r | |
| 51 | //\r | |
| 52 | IdtDescriptor = (IA32_DESCRIPTOR *) (UINTN) (AcpiS3Context->IdtrProfile);\r | |
| 53 | IdtEntry = (INTERRUPT_GATE_DESCRIPTOR *)(IdtDescriptor->Base + (3 * sizeof (INTERRUPT_GATE_DESCRIPTOR)));\r | |
| 54 | S3DebugBuffer = (UINTN) (AcpiS3Context->S3DebugBufferAddress);\r | |
| 55 | \r | |
| 56 | IdtEntry->OffsetLow = (UINT16)S3DebugBuffer;\r | |
| 57 | IdtEntry->SegmentSelector = (UINT16)AsmReadCs ();\r | |
| 58 | IdtEntry->Attributes = (UINT16)INTERRUPT_GATE_ATTRIBUTE;\r | |
| 59 | IdtEntry->OffsetHigh = (UINT16)(S3DebugBuffer >> 16);\r | |
| 60 | \r | |
| 61 | AsmWriteIdtr (IdtDescriptor);\r | |
| 62 | }\r | |
| 63 | \r |