mirror of
https://github.com/reactos/reactos.git
synced 2024-11-10 00:34:39 +00:00
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
|
|
* COPYRIGHT: GPL - See COPYING in the top level directory
|
|
* PROJECT: ReactOS Virtual DOS Machine
|
|
* FILE: subsystems/mvdm/ntvdm/emulator.h
|
|
* PURPOSE: Minimal x86 machine emulator for the VDM
|
|
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
|
|
*/
|
|
|
|
#ifndef _EMULATOR_H_
|
|
#define _EMULATOR_H_
|
|
|
|
/* INCLUDES *******************************************************************/
|
|
|
|
#include <fast486.h>
|
|
|
|
/* DEFINES ********************************************************************/
|
|
|
|
/* Basic Memory Management */
|
|
#define MEM_ALIGN_DOWN(ptr, align) (PVOID)((ULONG_PTR)(ptr) & ~((align) - 1l))
|
|
#define MEM_ALIGN_UP(ptr, align) MEM_ALIGN_DOWN((ULONG_PTR)(ptr) + (align) - 1l, (align))
|
|
|
|
#define TO_LINEAR(seg, off) (((seg) << 4) + (off))
|
|
#define MAX_SEGMENT 0xFFFF
|
|
#define MAX_OFFSET 0xFFFF
|
|
#define MAX_ADDRESS 0x1000000 // 16 MB of RAM; see also: kernel32/client/vdm.c!BaseGetVdmConfigInfo
|
|
C_ASSERT(0x100000 <= MAX_ADDRESS); // A minimum of 1 MB is required for PC emulation.
|
|
|
|
#define SEG_OFF_TO_PTR(seg, off) \
|
|
(PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), (off)))
|
|
|
|
#define FAR_POINTER(x) SEG_OFF_TO_PTR(HIWORD(x), LOWORD(x))
|
|
|
|
#define REAL_TO_PHYS(ptr) (PVOID)((ULONG_PTR)(ptr) + (ULONG_PTR)BaseAddress)
|
|
#define PHYS_TO_REAL(ptr) (PVOID)((ULONG_PTR)(ptr) - (ULONG_PTR)BaseAddress)
|
|
|
|
#define ARRAY_INDEX(ptr, array) ((ULONG)(((ULONG_PTR)(ptr) - (ULONG_PTR)(array)) / sizeof(*array)))
|
|
|
|
/* BCD-Binary conversion */
|
|
|
|
FORCEINLINE
|
|
USHORT
|
|
BINARY_TO_BCD(USHORT Value)
|
|
{
|
|
USHORT Result;
|
|
|
|
Result = (Value / 1000) << 12;
|
|
Value %= 1000;
|
|
Result |= (Value / 100) << 8;
|
|
Value %= 100;
|
|
Result |= (Value / 10) << 4;
|
|
Value %= 10;
|
|
Result |= Value;
|
|
|
|
return Result;
|
|
}
|
|
|
|
FORCEINLINE
|
|
USHORT
|
|
BCD_TO_BINARY(USHORT Value)
|
|
{
|
|
USHORT Result;
|
|
|
|
Result = Value & 0xF;
|
|
Value >>= 4;
|
|
Result += (Value & 0xF) * 10;
|
|
Value >>= 4;
|
|
Result += (Value & 0xF) * 100;
|
|
Value >>= 4;
|
|
Result += Value * 1000;
|
|
|
|
return Result;
|
|
}
|
|
|
|
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
|
|
};
|
|
|
|
extern FAST486_STATE EmulatorContext;
|
|
extern LPVOID BaseAddress;
|
|
extern BOOLEAN VdmRunning;
|
|
|
|
/* FUNCTIONS ******************************************************************/
|
|
|
|
VOID DumpMemory(BOOLEAN TextFormat);
|
|
|
|
VOID MountFloppy(IN ULONG DiskNumber);
|
|
VOID EjectFloppy(IN ULONG DiskNumber);
|
|
|
|
UCHAR FASTCALL EmulatorIntAcknowledge
|
|
(
|
|
PFAST486_STATE State
|
|
);
|
|
|
|
VOID FASTCALL EmulatorFpu
|
|
(
|
|
PFAST486_STATE State
|
|
);
|
|
|
|
VOID EmulatorInterruptSignal(VOID);
|
|
VOID EmulatorException(BYTE ExceptionNumber, LPWORD Stack);
|
|
|
|
VOID EmulatorPause(VOID);
|
|
VOID EmulatorResume(VOID);
|
|
VOID EmulatorTerminate(VOID);
|
|
|
|
BOOLEAN EmulatorInitialize(HANDLE ConsoleInput, HANDLE ConsoleOutput);
|
|
VOID EmulatorCleanup(VOID);
|
|
|
|
#endif // _EMULATOR_H_
|
|
|
|
/* EOF */
|