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Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Thunk16/Thunk16Lib.h')
| -rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/Thunk16/Thunk16Lib.h | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Thunk16/Thunk16Lib.h b/EdkCompatibilityPkg/Foundation/Library/Thunk16/Thunk16Lib.h new file mode 100644 index 0000000000..226c0160b9 --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/Thunk16/Thunk16Lib.h @@ -0,0 +1,348 @@ +/*++
+
+Copyright (c) 2006, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module Name:
+
+ Thunk16Lib.h
+
+Abstract:
+
+ Real Mode Thunk Header file
+
+--*/
+
+#ifndef __THUNK_16_LIB_H__
+#define __THUNK_16_LIB_H__
+#include "Tiano.h"
+
+//
+// Thunk Flags
+//
+#define THUNK_SAVE_FP_STATE 0x1
+#define THUNK_USER_STACK 0x2
+#define THUNK_INTERRUPT 0x10000
+
+//
+// Byte packed structure for 16-bit Real Mode FLAGS
+//
+typedef union {
+ struct {
+ UINT32 CF:1; // Carry Flag
+ UINT32 Reserved_0:1; // Reserved
+ UINT32 PF:1; // Parity Flag
+ UINT32 Reserved_1:1; // Reserved
+ UINT32 AF:1; // Auxiliary Carry Flag
+ UINT32 Reserved_2:1; // Reserved
+ UINT32 ZF:1; // Zero Flag
+ UINT32 SF:1; // Sign Flag
+ UINT32 TF:1; // Trap Flag
+ UINT32 IF:1; // Interrupt Enable Flag
+ UINT32 DF:1; // Direction Flag
+ UINT32 OF:1; // Overflow Flag
+ UINT32 IOPL:2; // I/O Privilege Level
+ UINT32 NT:1; // Nested Task
+ UINT32 Reserved_3:1; // Reserved
+ } Bits;
+ UINTN UintN;
+} IA32_FLAGS16;
+
+//
+// Byte packed structure for EFLAGS
+// 32-bits on IA32
+// 64-bits on X64
+//
+
+typedef union {
+ struct {
+ UINT32 CF:1; // Carry Flag
+ UINT32 Reserved_0:1; // Reserved
+ UINT32 PF:1; // Parity Flag
+ UINT32 Reserved_1:1; // Reserved
+ UINT32 AF:1; // Auxiliary Carry Flag
+ UINT32 Reserved_2:1; // Reserved
+ UINT32 ZF:1; // Zero Flag
+ UINT32 SF:1; // Sign Flag
+ UINT32 TF:1; // Trap Flag
+ UINT32 IF:1; // Interrupt Enable Flag
+ UINT32 DF:1; // Direction Flag
+ UINT32 OF:1; // Overflow Flag
+ UINT32 IOPL:2; // I/O Privilege Level
+ UINT32 NT:1; // Nested Task
+ UINT32 Reserved_3:1; // Reserved
+ UINT32 RF:1; // Resume Flag
+ UINT32 VM:1; // Virtual 8086 Mode
+ UINT32 AC:1; // Alignment Check
+ UINT32 VIF:1; // Virtual Interrupt Flag
+ UINT32 VIP:1; // Virtual Interrupt Pending
+ UINT32 ID:1; // ID Flag
+ UINT32 Reserved_4:10; // Reserved
+ } Bits;
+ UINTN UintN;
+} IA32_EFLAGS32;
+
+//
+// Byte packed structure for an FP/SSE/SSE2 context
+//
+typedef struct {
+ UINT8 Buffer[512];
+} IA32_FX_BUFFER;
+
+//
+// Structures for the 16-bit real mode thunks
+//
+typedef struct {
+ UINT32 Reserved1;
+ UINT32 Reserved2;
+ UINT32 Reserved3;
+ UINT32 Reserved4;
+ UINT8 BL;
+ UINT8 BH;
+ UINT16 Reserved5;
+ UINT8 DL;
+ UINT8 DH;
+ UINT16 Reserved6;
+ UINT8 CL;
+ UINT8 CH;
+ UINT16 Reserved7;
+ UINT8 AL;
+ UINT8 AH;
+ UINT16 Reserved8;
+} IA32_BYTE_REGS;
+
+typedef struct {
+ UINT16 DI;
+ UINT16 Reserved1;
+ UINT16 SI;
+ UINT16 Reserved2;
+ UINT16 BP;
+ UINT16 Reserved3;
+ UINT16 SP;
+ UINT16 Reserved4;
+ UINT16 BX;
+ UINT16 Reserved5;
+ UINT16 DX;
+ UINT16 Reserved6;
+ UINT16 CX;
+ UINT16 Reserved7;
+ UINT16 AX;
+ UINT16 Reserved8;
+ UINT16 DS;
+ UINT16 ES;
+ UINT16 FS;
+ UINT16 GS;
+ IA32_FLAGS16 Flags;
+ UINT16 IP;
+ UINT16 Reserved10;
+ UINT16 CS;
+ UINT16 SS;
+} IA32_WORD_REGS;
+
+typedef struct {
+ UINT32 EDI;
+ UINT32 ESI;
+ UINT32 EBP;
+ UINT32 ESP;
+ UINT32 EBX;
+ UINT32 EDX;
+ UINT32 ECX;
+ UINT32 EAX;
+ UINT16 DS;
+ UINT16 ES;
+ UINT16 FS;
+ UINT16 GS;
+ IA32_EFLAGS32 EFLAGS;
+ UINT32 EIP;
+ UINT16 CS;
+ UINT16 SS;
+} IA32_DWORD_REGS;
+
+typedef union {
+ IA32_DWORD_REGS E;
+ IA32_WORD_REGS X;
+ IA32_BYTE_REGS H;
+} IA32_REGISTER_SET;
+
+//
+// Byte packed structure for an 16-bit real mode thunks
+//
+typedef struct {
+ UINT32 RealModeBuffer;
+ UINT32 DefaultStack;
+} THUNK_CONTEXT;
+
+//
+// 16-bit thunking services
+//
+
+UINTN
+EFIAPI
+AsmThunk16GetProperties (
+ OUT UINTN *MinimumStackSize OPTIONAL
+ )
+/*++
+
+Routine Description:
+
+ Returns the properties of this real mode thunk implementation. Currently
+ there are 2 properties has been defined, the minimum real mode buffer size
+ and the minimum stack size.
+
+Arguments:
+
+ MinimumStackSize - The minimum size required for a 16-bit stack.
+
+Returns:
+
+ The minimum size of the real mode buffer needed by this thunk implementation
+ is returned.
+
+--*/
+;
+
+THUNK_CONTEXT *
+EFIAPI
+AsmThunk16SetProperties (
+ OUT THUNK_CONTEXT *ThunkContext,
+ IN VOID *RealModeBuffer,
+ IN UINTN BufferSize
+ )
+/*++
+
+Routine Description:
+
+ Tell this real mode thunk implementation the address and size of the real
+ mode buffer needed.
+
+Arguments:
+
+ ThunkContext - The thunk context whose properties to set.
+ RealModeBuffer - The address of the buffer allocated by caller. It should be
+ aligned on a 16-byte boundary.
+ This buffer must be in identity mapped pages.
+ BufferSize - The size of RealModeBuffer. Must be larger than the minimum
+ size required as returned by AsmThunk16GetProperties().
+
+Returns:
+
+ None
+
+--*/
+;
+
+VOID
+EFIAPI
+AsmThunk16Destroy (
+ IN OUT THUNK_CONTEXT *ThunkContext
+ )
+/*++
+
+Routine Description:
+
+ Reset all internal states to their initial values. The caller should not
+ release the real mode buffer until after a call to this function.
+
+Arguments:
+
+ ThunkContext - The thunk context to destroy.
+
+Returns:
+
+ None
+
+--*/
+;
+
+IA32_REGISTER_SET *
+EFIAPI
+AsmThunk16FarCall86 (
+ IN THUNK_CONTEXT *ThunkContext,
+ IN OUT IA32_REGISTER_SET *RegisterSet,
+ IN UINT32 ThunkFlags
+ )
+/*++
+
+Routine Description:
+
+ Make a far call to 16-bit code.
+
+ NOTE: This function must be called on TPL_HIGH_LEVEL or with interrupts
+ disabled because of GDTR and IDTR manipulations.
+ This function must be placed in identity mapped pages.
+
+Arguments:
+
+ ThunkContext - Thunk context to use.
+ RegisterSet - CPU registers would be set to the values contained in this
+ structure before making the far call. Then CPU registers are
+ copied back to this structure.
+ CS:EIP points to the real mode code being called on input.
+ SS:ESP points to the real mode stack if THUNK_USER_STACK is
+ set on input, otherwise ignored.
+ EFlages is ignored on input.
+ On output, values of CS, EIP, SS and ESP should be ignored.
+ ThunkFlags - 2 flags have currently been defined, THUNK_SAVE_FP_STATE and
+ THUNK_USER_STACK.
+ THUNK_SAVE_FP_STATE - FPU state would be saved/restored
+ before/after calling real mode code.
+ THUNK_USER_STACK - The stack specified by SS:ESP would be
+ used instead of the default stack.
+
+Returns:
+
+ RegisterSet is returned.
+
+--*/
+;
+
+IA32_REGISTER_SET *
+EFIAPI
+AsmThunk16Int86 (
+ IN THUNK_CONTEXT *ThunkContext,
+ IN UINT8 IntNumber,
+ IN OUT IA32_REGISTER_SET *RegisterSet,
+ IN UINT32 ThunkFlags
+ )
+/*++
+
+Routine Description:
+
+ Invoke a 16-bit interrupt handler.
+
+ NOTE: This function must be called on TPL_HIGH_LEVEL or with interrupts
+ disabled because of GDTR and IDTR manipulations.
+ This function must be placed in identity mapped pages.
+
+Arguments:
+
+ ThunkContext - Thunk context to use.
+ IntNumber - The ordinal of the interrupt handler ranging from 0 to 255.
+ RegisterSet - CPU registers would be set to the values contained in this
+ structure before making the far call. Then CPU registers are
+ copied back to this structure.
+ SS:ESP points to the real mode stack if THUNK_USER_STACK is
+ set on input, otherwise ignored.
+ EFlages is ignored on input.
+ On output, values of CS, EIP, SS and ESP should be ignored.
+ ThunkFlags - 2 flags have currently been defined, THUNK_SAVE_FP_STATE and
+ THUNK_USER_STACK.
+ THUNK_SAVE_FP_STATE - FPU state would be saved/restored
+ before/after calling real mode code.
+ THUNK_USER_STACK - The stack specified by SS:ESP would be
+ used instead of the default stack.
+
+Returns:
+
+ RegisterSet is returned.
+
+--*/
+;
+
+#endif
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