+++ /dev/null
-/*++\r
-\r
-Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
-This program and the accompanying materials \r
-are licensed and made available under the terms and conditions of the BSD License \r
-which accompanies this distribution. The full text of the license may be found at \r
-http://opensource.org/licenses/bsd-license.php \r
- \r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
-\r
-Module Name:\r
-\r
- Thunk16Lib.h\r
-\r
-Abstract:\r
-\r
- Real Mode Thunk Header file\r
-\r
---*/\r
-\r
-#ifndef __THUNK_16_LIB_H__\r
-#define __THUNK_16_LIB_H__\r
-#include "Tiano.h"\r
-\r
-//\r
-// Thunk Flags\r
-//\r
-#define THUNK_SAVE_FP_STATE 0x1\r
-#define THUNK_USER_STACK 0x2\r
-#define THUNK_INTERRUPT 0x10000\r
-\r
-//\r
-// Byte packed structure for 16-bit Real Mode FLAGS\r
-//\r
-typedef union {\r
- struct {\r
- UINT32 CF:1; // Carry Flag\r
- UINT32 Reserved_0:1; // Reserved\r
- UINT32 PF:1; // Parity Flag\r
- UINT32 Reserved_1:1; // Reserved\r
- UINT32 AF:1; // Auxiliary Carry Flag\r
- UINT32 Reserved_2:1; // Reserved\r
- UINT32 ZF:1; // Zero Flag\r
- UINT32 SF:1; // Sign Flag\r
- UINT32 TF:1; // Trap Flag\r
- UINT32 IF:1; // Interrupt Enable Flag\r
- UINT32 DF:1; // Direction Flag\r
- UINT32 OF:1; // Overflow Flag\r
- UINT32 IOPL:2; // I/O Privilege Level\r
- UINT32 NT:1; // Nested Task\r
- UINT32 Reserved_3:1; // Reserved\r
- } Bits;\r
- UINTN UintN;\r
-} IA32_FLAGS16;\r
-\r
-//\r
-// Byte packed structure for EFLAGS\r
-// 32-bits on IA32\r
-// 64-bits on X64\r
-//\r
-\r
-typedef union {\r
- struct {\r
- UINT32 CF:1; // Carry Flag\r
- UINT32 Reserved_0:1; // Reserved\r
- UINT32 PF:1; // Parity Flag\r
- UINT32 Reserved_1:1; // Reserved\r
- UINT32 AF:1; // Auxiliary Carry Flag\r
- UINT32 Reserved_2:1; // Reserved\r
- UINT32 ZF:1; // Zero Flag\r
- UINT32 SF:1; // Sign Flag\r
- UINT32 TF:1; // Trap Flag\r
- UINT32 IF:1; // Interrupt Enable Flag\r
- UINT32 DF:1; // Direction Flag\r
- UINT32 OF:1; // Overflow Flag\r
- UINT32 IOPL:2; // I/O Privilege Level\r
- UINT32 NT:1; // Nested Task\r
- UINT32 Reserved_3:1; // Reserved\r
- UINT32 RF:1; // Resume Flag\r
- UINT32 VM:1; // Virtual 8086 Mode\r
- UINT32 AC:1; // Alignment Check\r
- UINT32 VIF:1; // Virtual Interrupt Flag\r
- UINT32 VIP:1; // Virtual Interrupt Pending\r
- UINT32 ID:1; // ID Flag\r
- UINT32 Reserved_4:10; // Reserved\r
- } Bits;\r
- UINTN UintN;\r
-} IA32_EFLAGS32;\r
-\r
-//\r
-// Byte packed structure for an FP/SSE/SSE2 context\r
-//\r
-typedef struct {\r
- UINT8 Buffer[512];\r
-} IA32_FX_BUFFER;\r
-\r
-//\r
-// Structures for the 16-bit real mode thunks\r
-//\r
-typedef struct {\r
- UINT32 Reserved1;\r
- UINT32 Reserved2;\r
- UINT32 Reserved3;\r
- UINT32 Reserved4;\r
- UINT8 BL;\r
- UINT8 BH;\r
- UINT16 Reserved5;\r
- UINT8 DL;\r
- UINT8 DH;\r
- UINT16 Reserved6;\r
- UINT8 CL;\r
- UINT8 CH;\r
- UINT16 Reserved7;\r
- UINT8 AL;\r
- UINT8 AH;\r
- UINT16 Reserved8;\r
-} IA32_BYTE_REGS;\r
-\r
-typedef struct {\r
- UINT16 DI;\r
- UINT16 Reserved1;\r
- UINT16 SI;\r
- UINT16 Reserved2;\r
- UINT16 BP;\r
- UINT16 Reserved3;\r
- UINT16 SP;\r
- UINT16 Reserved4;\r
- UINT16 BX;\r
- UINT16 Reserved5;\r
- UINT16 DX;\r
- UINT16 Reserved6;\r
- UINT16 CX;\r
- UINT16 Reserved7;\r
- UINT16 AX;\r
- UINT16 Reserved8;\r
- UINT16 DS;\r
- UINT16 ES;\r
- UINT16 FS;\r
- UINT16 GS;\r
- IA32_FLAGS16 Flags;\r
- UINT16 IP;\r
- UINT16 Reserved10;\r
- UINT16 CS;\r
- UINT16 SS;\r
-} IA32_WORD_REGS;\r
-\r
-typedef struct {\r
- UINT32 EDI;\r
- UINT32 ESI;\r
- UINT32 EBP;\r
- UINT32 ESP;\r
- UINT32 EBX;\r
- UINT32 EDX;\r
- UINT32 ECX;\r
- UINT32 EAX;\r
- UINT16 DS;\r
- UINT16 ES;\r
- UINT16 FS;\r
- UINT16 GS;\r
- IA32_EFLAGS32 EFLAGS;\r
- UINT32 EIP;\r
- UINT16 CS;\r
- UINT16 SS;\r
-} IA32_DWORD_REGS;\r
-\r
-typedef union {\r
- IA32_DWORD_REGS E;\r
- IA32_WORD_REGS X;\r
- IA32_BYTE_REGS H;\r
-} IA32_REGISTER_SET;\r
-\r
-//\r
-// Byte packed structure for an 16-bit real mode thunks\r
-//\r
-typedef struct {\r
- UINT32 RealModeBuffer;\r
- UINT32 DefaultStack;\r
-} THUNK_CONTEXT;\r
-\r
-//\r
-// 16-bit thunking services\r
-//\r
-\r
-UINTN\r
-EFIAPI\r
-AsmThunk16GetProperties (\r
- OUT UINTN *MinimumStackSize OPTIONAL\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Returns the properties of this real mode thunk implementation. Currently\r
- there are 2 properties has been defined, the minimum real mode buffer size\r
- and the minimum stack size.\r
-\r
-Arguments:\r
-\r
- MinimumStackSize - The minimum size required for a 16-bit stack.\r
-\r
-Returns:\r
-\r
- The minimum size of the real mode buffer needed by this thunk implementation\r
- is returned.\r
-\r
---*/\r
-;\r
-\r
-THUNK_CONTEXT *\r
-EFIAPI\r
-AsmThunk16SetProperties (\r
- OUT THUNK_CONTEXT *ThunkContext,\r
- IN VOID *RealModeBuffer,\r
- IN UINTN BufferSize\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Tell this real mode thunk implementation the address and size of the real\r
- mode buffer needed.\r
-\r
-Arguments:\r
-\r
- ThunkContext - The thunk context whose properties to set.\r
- RealModeBuffer - The address of the buffer allocated by caller. It should be\r
- aligned on a 16-byte boundary.\r
- This buffer must be in identity mapped pages.\r
- BufferSize - The size of RealModeBuffer. Must be larger than the minimum\r
- size required as returned by AsmThunk16GetProperties().\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-;\r
-\r
-BOOLEAN\r
-AsmThunk16SetUserStack (\r
- IN THUNK_CONTEXT *ThunkContext,\r
- IN VOID *Stack,\r
- IN UINTN StackSize\r
- );\r
-\r
-VOID\r
-EFIAPI\r
-AsmThunk16Destroy (\r
- IN OUT THUNK_CONTEXT *ThunkContext\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Reset all internal states to their initial values. The caller should not\r
- release the real mode buffer until after a call to this function.\r
-\r
-Arguments:\r
-\r
- ThunkContext - The thunk context to destroy.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-;\r
-\r
-IA32_REGISTER_SET *\r
-EFIAPI\r
-AsmThunk16FarCall86 (\r
- IN THUNK_CONTEXT *ThunkContext,\r
- IN OUT IA32_REGISTER_SET *RegisterSet,\r
- IN UINT32 ThunkFlags\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Make a far call to 16-bit code.\r
-\r
- NOTE: This function must be called on TPL_HIGH_LEVEL or with interrupts\r
- disabled because of GDTR and IDTR manipulations.\r
- This function must be placed in identity mapped pages.\r
-\r
-Arguments:\r
-\r
- ThunkContext - Thunk context to use.\r
- RegisterSet - CPU registers would be set to the values contained in this\r
- structure before making the far call. Then CPU registers are\r
- copied back to this structure.\r
- CS:EIP points to the real mode code being called on input.\r
- SS:ESP points to the real mode stack if THUNK_USER_STACK is\r
- set on input, otherwise ignored.\r
- EFlages is ignored on input.\r
- On output, values of CS, EIP, SS and ESP should be ignored.\r
- ThunkFlags - 2 flags have currently been defined, THUNK_SAVE_FP_STATE and\r
- THUNK_USER_STACK.\r
- THUNK_SAVE_FP_STATE - FPU state would be saved/restored\r
- before/after calling real mode code.\r
- THUNK_USER_STACK - The stack specified by SS:ESP would be\r
- used instead of the default stack.\r
-\r
-Returns:\r
-\r
- RegisterSet is returned.\r
-\r
---*/\r
-;\r
-\r
-IA32_REGISTER_SET *\r
-EFIAPI\r
-AsmThunk16Int86 (\r
- IN THUNK_CONTEXT *ThunkContext,\r
- IN UINT8 IntNumber,\r
- IN OUT IA32_REGISTER_SET *RegisterSet,\r
- IN UINT32 ThunkFlags\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Invoke a 16-bit interrupt handler.\r
-\r
- NOTE: This function must be called on TPL_HIGH_LEVEL or with interrupts\r
- disabled because of GDTR and IDTR manipulations.\r
- This function must be placed in identity mapped pages.\r
-\r
-Arguments:\r
-\r
- ThunkContext - Thunk context to use.\r
- IntNumber - The ordinal of the interrupt handler ranging from 0 to 255.\r
- RegisterSet - CPU registers would be set to the values contained in this\r
- structure before making the far call. Then CPU registers are\r
- copied back to this structure.\r
- SS:ESP points to the real mode stack if THUNK_USER_STACK is\r
- set on input, otherwise ignored.\r
- EFlages is ignored on input.\r
- On output, values of CS, EIP, SS and ESP should be ignored.\r
- ThunkFlags - 2 flags have currently been defined, THUNK_SAVE_FP_STATE and\r
- THUNK_USER_STACK.\r
- THUNK_SAVE_FP_STATE - FPU state would be saved/restored\r
- before/after calling real mode code.\r
- THUNK_USER_STACK - The stack specified by SS:ESP would be\r
- used instead of the default stack.\r
-\r
-Returns:\r
-\r
- RegisterSet is returned.\r
-\r
---*/\r
-;\r
-\r
-#endif\r
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