reactos/subsystems/mvdm/ntvdm/cpu/cpu.h

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/*
* COPYRIGHT: GPL - See COPYING in the top level directory
* PROJECT: ReactOS Virtual DOS Machine
* FILE: subsystems/mvdm/ntvdm/cpu/cpu.h
* PURPOSE: Minimal x86 machine emulator for the VDM
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*/
#ifndef _CPU_H_
#define _CPU_H_
/* INCLUDES *******************************************************************/
#include <fast486.h>
/* DEFINES ********************************************************************/
/* FLAGS */
#define EMULATOR_FLAG_CF (1 << 0)
#define EMULATOR_FLAG_PF (1 << 2)
#define EMULATOR_FLAG_AF (1 << 4)
#define EMULATOR_FLAG_ZF (1 << 6)
#define EMULATOR_FLAG_SF (1 << 7)
#define EMULATOR_FLAG_TF (1 << 8)
#define EMULATOR_FLAG_IF (1 << 9)
#define EMULATOR_FLAG_DF (1 << 10)
#define EMULATOR_FLAG_OF (1 << 11)
#define EMULATOR_FLAG_NT (1 << 14)
#define EMULATOR_FLAG_RF (1 << 16)
#define EMULATOR_FLAG_VM (1 << 17)
#define EMULATOR_FLAG_AC (1 << 18)
#define EMULATOR_FLAG_VIF (1 << 19)
#define EMULATOR_FLAG_VIP (1 << 20)
#define EMULATOR_FLAG_ID (1 << 21)
#if 0
enum
{
EMULATOR_EXCEPTION_DIVISION_BY_ZERO,
EMULATOR_EXCEPTION_DEBUG,
EMULATOR_EXCEPTION_NMI,
EMULATOR_EXCEPTION_BREAKPOINT,
EMULATOR_EXCEPTION_OVERFLOW,
EMULATOR_EXCEPTION_BOUND,
EMULATOR_EXCEPTION_INVALID_OPCODE,
EMULATOR_EXCEPTION_NO_FPU,
EMULATOR_EXCEPTION_DOUBLE_FAULT,
EMULATOR_EXCEPTION_FPU_SEGMENT,
EMULATOR_EXCEPTION_INVALID_TSS,
EMULATOR_EXCEPTION_NO_SEGMENT,
EMULATOR_EXCEPTION_STACK_SEGMENT,
EMULATOR_EXCEPTION_GPF,
EMULATOR_EXCEPTION_PAGE_FAULT
};
#endif
extern BOOLEAN CpuRunning;
extern FAST486_STATE EmulatorContext;
/* FUNCTIONS ******************************************************************/
#if 0
VOID EmulatorException(BYTE ExceptionNumber, LPWORD Stack);
#endif
VOID CpuExecute(WORD Segment, WORD Offset);
VOID CpuStep(VOID);
VOID CpuSimulate(VOID);
VOID CpuUnsimulate(VOID);
#if 0
VOID EmulatorTerminate(VOID);
#endif
BOOLEAN CpuInitialize(VOID);
VOID CpuCleanup(VOID);
#endif // _CPU_H_
/* EOF */