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44c816e20c
Use an external interrupt for the FPU when the NE bit of CR0 is cleared. svn path=/trunk/; revision=65961
113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: emulator.h
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* PURPOSE: Minimal x86 machine emulator for the VDM
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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#ifndef _EMULATOR_H_
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#define _EMULATOR_H_
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#include <fast486.h>
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/* DEFINES ********************************************************************/
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/* Basic Memory Management */
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#define MEM_ALIGN_UP(ptr, align) MEM_ALIGN_DOWN((ULONG_PTR)(ptr) + (align) - 1l, (align))
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#define MEM_ALIGN_DOWN(ptr, align) (PVOID)((ULONG_PTR)(ptr) & ~((align) - 1l))
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#define TO_LINEAR(seg, off) (((seg) << 4) + (off))
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#define MAX_SEGMENT 0xFFFF
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#define MAX_OFFSET 0xFFFF
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#define MAX_ADDRESS 0x1000000 // 16 MB of RAM; see also: kernel32/client/vdm.c!BaseGetVdmConfigInfo
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#define FAR_POINTER(x) \
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(PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR(HIWORD(x), LOWORD(x)))
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#define SEG_OFF_TO_PTR(seg, off) \
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(PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), (off)))
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#define REAL_TO_PHYS(ptr) (PVOID)((ULONG_PTR)(ptr) + (ULONG_PTR)BaseAddress)
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#define PHYS_TO_REAL(ptr) (PVOID)((ULONG_PTR)(ptr) - (ULONG_PTR)BaseAddress)
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/* BCD-Binary conversion */
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#define BINARY_TO_BCD(x) ((((x) / 1000) << 12) + (((x) / 100) << 8) + (((x) / 10) << 4) + ((x) % 10))
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#define BCD_TO_BINARY(x) (((x) >> 12) * 1000 + ((x) >> 8) * 100 + ((x) >> 4) * 10 + ((x) & 0x0F))
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/* System I/O ports */
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#define CONTROL_SYSTEM_PORT61H 0x61
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enum
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{
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EMULATOR_EXCEPTION_DIVISION_BY_ZERO,
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EMULATOR_EXCEPTION_DEBUG,
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EMULATOR_EXCEPTION_NMI,
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EMULATOR_EXCEPTION_BREAKPOINT,
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EMULATOR_EXCEPTION_OVERFLOW,
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EMULATOR_EXCEPTION_BOUND,
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EMULATOR_EXCEPTION_INVALID_OPCODE,
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EMULATOR_EXCEPTION_NO_FPU,
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EMULATOR_EXCEPTION_DOUBLE_FAULT,
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EMULATOR_EXCEPTION_FPU_SEGMENT,
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EMULATOR_EXCEPTION_INVALID_TSS,
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EMULATOR_EXCEPTION_NO_SEGMENT,
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EMULATOR_EXCEPTION_STACK_SEGMENT,
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EMULATOR_EXCEPTION_GPF,
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EMULATOR_EXCEPTION_PAGE_FAULT
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};
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// extern FAST486_STATE EmulatorContext;
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extern LPVOID BaseAddress;
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extern BOOLEAN VdmRunning;
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/* FUNCTIONS ******************************************************************/
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VOID DumpMemory(BOOLEAN TextFormat);
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VOID WINAPI EmulatorReadMemory
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(
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PFAST486_STATE State,
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ULONG Address,
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PVOID Buffer,
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ULONG Size
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);
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VOID WINAPI EmulatorWriteMemory
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(
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PFAST486_STATE State,
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ULONG Address,
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PVOID Buffer,
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ULONG Size
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);
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UCHAR WINAPI EmulatorIntAcknowledge
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(
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PFAST486_STATE State
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);
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VOID WINAPI EmulatorFpu
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(
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PFAST486_STATE State
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);
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VOID EmulatorException(BYTE ExceptionNumber, LPWORD Stack);
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VOID EmulatorTerminate(VOID);
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VOID EmulatorInterruptSignal(VOID);
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VOID EmulatorSetA20(BOOLEAN Enabled);
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BOOLEAN EmulatorInitialize(HANDLE ConsoleInput, HANDLE ConsoleOutput);
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VOID EmulatorCleanup(VOID);
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#endif // _EMULATOR_H_
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/* EOF */
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