UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / OvmfPkg / Include / IndustryStandard / InstructionParsing.h

/** @file\r
  Instruction parsing support definitions.\r
\r
  Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#ifndef __INSTRUCTION_PARSING_H__\r
#define __INSTRUCTION_PARSING_H__\r
\r
#include <Base.h>\r
#include <Uefi.h>\r
\r
//\r
// Instruction REX prefix definition\r
//\r
typedef union {\r
  struct {\r
    UINT8    BitB : 1;\r
    UINT8    BitX : 1;\r
    UINT8    BitR : 1;\r
    UINT8    BitW : 1;\r
    UINT8    Rex  : 4;\r
  } Bits;\r
\r
  UINT8    Uint8;\r
} INSTRUCTION_REX_PREFIX;\r
\r
//\r
// Instruction ModRM definition\r
//\r
typedef union {\r
  struct {\r
    UINT8    Rm  : 3;\r
    UINT8    Reg : 3;\r
    UINT8    Mod : 2;\r
  } Bits;\r
\r
  UINT8    Uint8;\r
} INSTRUCTION_MODRM;\r
\r
//\r
// Instruction SIB definition\r
//\r
typedef union {\r
  struct {\r
    UINT8    Base  : 3;\r
    UINT8    Index : 3;\r
    UINT8    Scale : 2;\r
  } Bits;\r
\r
  UINT8    Uint8;\r
} INSTRUCTION_SIB;\r
\r
//\r
// Legacy Instruction Prefixes\r
//\r
#define OVERRIDE_SEGMENT_CS    0x2E\r
#define OVERRIDE_SEGMENT_DS    0x3E\r
#define OVERRIDE_SEGMENT_ES    0x26\r
#define OVERRIDE_SEGMENT_SS    0x36\r
#define OVERRIDE_SEGMENT_FS    0x64\r
#define OVERRIDE_SEGMENT_GS    0x65\r
#define OVERRIDE_OPERAND_SIZE  0x66\r
#define OVERRIDE_ADDRESS_SIZE  0x67\r
#define LOCK_PREFIX            0xF0\r
#define REPNZ_PREFIX           0xF2\r
#define REPZ_PREFIX            0xF3\r
\r
//\r
// REX Prefixes\r
//\r
#define REX_PREFIX_START             0x40\r
#define REX_PREFIX_STOP              0x4F\r
#define REX_64BIT_OPERAND_SIZE_MASK  0x08\r
\r
//\r
// Two-byte Opcode Flag\r
//\r
#define TWO_BYTE_OPCODE_ESCAPE  0x0F\r
\r
#endif\r