fast486.c File Reference

#include <windef.h>
#include <debug.h>
#include <fast486.h>
#include "common.h"
#include "opcodes.h"
#include "fpu.h"

Include dependency graph for fast486.c:

Go to the source code of this file.

Functions
static VOID FASTCALL	Fast486MemReadCallback (PFAST486_STATE State, ULONG Address, PVOID Buffer, ULONG Size)
static VOID FASTCALL	Fast486MemWriteCallback (PFAST486_STATE State, ULONG Address, PVOID Buffer, ULONG Size)
static VOID FASTCALL	Fast486IoReadCallback (PFAST486_STATE State, USHORT Port, PVOID Buffer, ULONG DataCount, UCHAR DataSize)
static VOID FASTCALL	Fast486IoWriteCallback (PFAST486_STATE State, USHORT Port, PVOID Buffer, ULONG DataCount, UCHAR DataSize)
static VOID FASTCALL	Fast486BopCallback (PFAST486_STATE State, UCHAR BopCode)
static UCHAR FASTCALL	Fast486IntAckCallback (PFAST486_STATE State)
static VOID FASTCALL	Fast486FpuCallback (PFAST486_STATE State)
VOID NTAPI	Fast486Initialize (PFAST486_STATE State, FAST486_MEM_READ_PROC MemReadCallback, FAST486_MEM_WRITE_PROC MemWriteCallback, FAST486_IO_READ_PROC IoReadCallback, FAST486_IO_WRITE_PROC IoWriteCallback, FAST486_BOP_PROC BopCallback, FAST486_INT_ACK_PROC IntAckCallback, FAST486_FPU_PROC FpuCallback, PULONG Tlb)
VOID NTAPI	Fast486Reset (PFAST486_STATE State)
VOID NTAPI	Fast486InterruptSignal (PFAST486_STATE State)
VOID NTAPI	Fast486ExecuteAt (PFAST486_STATE State, USHORT Segment, ULONG Offset)
VOID NTAPI	Fast486SetStack (PFAST486_STATE State, USHORT Segment, ULONG Offset)
VOID NTAPI	Fast486SetSegment (PFAST486_STATE State, FAST486_SEG_REGS Segment, USHORT Selector)
VOID NTAPI	Fast486Rewind (PFAST486_STATE State)

Function Documentation

Fast486BopCallback()

static VOID FASTCALL Fast486BopCallback ( PFAST486_STATE  State, UCHAR  BopCode  )

static

Definition at line 76 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
    UNREFERENCED_PARAMETER(BopCode);
}

Referenced by Fast486Initialize().

Fast486ExecuteAt()

VOID NTAPI Fast486ExecuteAt	(	PFAST486_STATE	State,
		USHORT	Segment,
		ULONG	Offset
	)

Definition at line 212 of file fast486.c.

{
    /* Load the new CS */
    if (!Fast486LoadSegment(State, FAST486_REG_CS, Segment))
    {
        /* An exception occurred, let the handler execute instead */
        return;
    }
 
    /* Set the new IP */
    State->InstPtr.Long = Offset;
}

Referenced by CpuExecute(), and x86BiosCall().

Fast486FpuCallback()

static VOID FASTCALL Fast486FpuCallback ( PFAST486_STATE  State )

static

Definition at line 94 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
}

Referenced by Fast486Initialize().

Fast486Initialize()

VOID NTAPI Fast486Initialize	(	PFAST486_STATE	State,
		FAST486_MEM_READ_PROC	MemReadCallback,
		FAST486_MEM_WRITE_PROC	MemWriteCallback,
		FAST486_IO_READ_PROC	IoReadCallback,
		FAST486_IO_WRITE_PROC	IoWriteCallback,
		FAST486_BOP_PROC	BopCallback,
		FAST486_INT_ACK_PROC	IntAckCallback,
		FAST486_FPU_PROC	FpuCallback,
		PULONG	Tlb
	)

Definition at line 103 of file fast486.c.

{
    /* Set the callbacks (or use default ones if some are NULL) */
    State->MemReadCallback  = (MemReadCallback  ? MemReadCallback  : Fast486MemReadCallback );
    State->MemWriteCallback = (MemWriteCallback ? MemWriteCallback : Fast486MemWriteCallback);
    State->IoReadCallback   = (IoReadCallback   ? IoReadCallback   : Fast486IoReadCallback  );
    State->IoWriteCallback  = (IoWriteCallback  ? IoWriteCallback  : Fast486IoWriteCallback );
    State->BopCallback      = (BopCallback      ? BopCallback      : Fast486BopCallback     );
    State->IntAckCallback   = (IntAckCallback   ? IntAckCallback   : Fast486IntAckCallback  );
    State->FpuCallback      = (FpuCallback      ? FpuCallback      : Fast486FpuCallback     );
 
    /* Set the TLB (if given) */
    State->Tlb = Tlb;
 
    /* Reset the CPU */
    Fast486Reset(State);
}

Referenced by CpuInitialize(), and x86BiosCall().

Fast486IntAckCallback()

static UCHAR FASTCALL Fast486IntAckCallback ( PFAST486_STATE  State )

static

Definition at line 84 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
 
    /* Return something... defaulted to single-step interrupt */
    return 0x01;
}

Referenced by Fast486Initialize().

Fast486InterruptSignal()

VOID NTAPI Fast486InterruptSignal

(

PFAST486_STATE

State

)

Definition at line 205 of file fast486.c.

{
    State->IntSignaled = TRUE;
}

Referenced by EmulatorInterruptSignal().

Fast486IoReadCallback()

static VOID FASTCALL Fast486IoReadCallback ( PFAST486_STATE  State, USHORT  Port, PVOID  Buffer, ULONG  DataCount, UCHAR  DataSize  )

static

Definition at line 54 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
    UNREFERENCED_PARAMETER(Port);
    UNREFERENCED_PARAMETER(Buffer);
    UNREFERENCED_PARAMETER(DataCount);
    UNREFERENCED_PARAMETER(DataSize);
}

Referenced by Fast486Initialize().

Fast486IoWriteCallback()

static VOID FASTCALL Fast486IoWriteCallback ( PFAST486_STATE  State, USHORT  Port, PVOID  Buffer, ULONG  DataCount, UCHAR  DataSize  )

static

Definition at line 65 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
    UNREFERENCED_PARAMETER(Port);
    UNREFERENCED_PARAMETER(Buffer);
    UNREFERENCED_PARAMETER(DataCount);
    UNREFERENCED_PARAMETER(DataSize);
}

Referenced by Fast486Initialize().

Fast486MemReadCallback()

static VOID FASTCALL Fast486MemReadCallback ( PFAST486_STATE  State, ULONG  Address, PVOID  Buffer, ULONG  Size  )

static

Definition at line 38 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
    RtlMoveMemory(Buffer, UlongToPtr(Address), Size);
}

Referenced by Fast486Initialize().

Fast486MemWriteCallback()

static VOID FASTCALL Fast486MemWriteCallback ( PFAST486_STATE  State, ULONG  Address, PVOID  Buffer, ULONG  Size  )

static

Definition at line 46 of file fast486.c.

{
    UNREFERENCED_PARAMETER(State);
    RtlMoveMemory(UlongToPtr(Address), Buffer, Size);
}

Referenced by Fast486Initialize().

Fast486Reset()

VOID NTAPI Fast486Reset

(

PFAST486_STATE

State

)

Definition at line 131 of file fast486.c.

{
    FAST486_SEG_REGS i;
 
    /* Save the callbacks and TLB */
    FAST486_MEM_READ_PROC  MemReadCallback  = State->MemReadCallback;
    FAST486_MEM_WRITE_PROC MemWriteCallback = State->MemWriteCallback;
    FAST486_IO_READ_PROC   IoReadCallback   = State->IoReadCallback;
    FAST486_IO_WRITE_PROC  IoWriteCallback  = State->IoWriteCallback;
    FAST486_BOP_PROC       BopCallback      = State->BopCallback;
    FAST486_INT_ACK_PROC   IntAckCallback   = State->IntAckCallback;
    FAST486_FPU_PROC       FpuCallback      = State->FpuCallback;
    PULONG                 Tlb              = State->Tlb;
 
    /* Clear the entire structure */
    RtlZeroMemory(State, sizeof(*State));
 
    /* Initialize the registers */
    State->Flags.AlwaysSet = 1;
    State->InstPtr.LowWord = 0xFFF0;
 
    /* Set the CPL to 0 */
    State->Cpl = 0;
 
    /* Initialize segments */
    for (i = 0; i < FAST486_NUM_SEG_REGS; i++)
    {
        State->SegmentRegs[i].Selector = 0;
        State->SegmentRegs[i].Base = 0;
        State->SegmentRegs[i].Limit = 0xFFFF;
        State->SegmentRegs[i].Present = TRUE;
        State->SegmentRegs[i].ReadWrite = TRUE;
        State->SegmentRegs[i].Executable = FALSE;
        State->SegmentRegs[i].DirConf = FALSE;
        State->SegmentRegs[i].SystemType = 1; // Segment descriptor
        State->SegmentRegs[i].Dpl = 0;
        State->SegmentRegs[i].Size = FALSE; // 16-bit
    }
 
    /* Initialize the code segment */
    State->SegmentRegs[FAST486_REG_CS].Executable = TRUE;
    State->SegmentRegs[FAST486_REG_CS].Selector = 0xF000;
    State->SegmentRegs[FAST486_REG_CS].Base = 0xFFFF0000;
 
    /* Initialize the IDT */
    State->Idtr.Size = 0x3FF;
    State->Idtr.Address = 0;
 
#ifndef FAST486_NO_FPU
    /* Initialize CR0 */
    State->ControlRegisters[FAST486_REG_CR0] |= FAST486_CR0_ET;
 
    /* Initialize the FPU control and tag registers */
    State->FpuControl.Value = FAST486_FPU_DEFAULT_CONTROL;
    State->FpuStatus.Value = 0;
    State->FpuTag = 0xFFFF;
#endif
 
    /* Restore the callbacks and TLB */
    State->MemReadCallback  = MemReadCallback;
    State->MemWriteCallback = MemWriteCallback;
    State->IoReadCallback   = IoReadCallback;
    State->IoWriteCallback  = IoWriteCallback;
    State->BopCallback      = BopCallback;
    State->IntAckCallback   = IntAckCallback;
    State->FpuCallback      = FpuCallback;
    State->Tlb              = Tlb;
 
    /* Flush the TLB */
    Fast486FlushTlb(State);
}

Referenced by Fast486ExceptionWithErrorCode(), and Fast486Initialize().

Fast486Rewind()

VOID NTAPI Fast486Rewind

(

PFAST486_STATE

State

)

Definition at line 252 of file fast486.c.

{
    /* This function is used when an instruction has been interrupted remotely */
    State->PrefixFlags = 0;
    State->InstPtr.Long = State->SavedInstPtr.Long;
 
#ifndef FAST486_NO_PREFETCH
    State->PrefetchValid = FALSE;
#endif
}

Referenced by CpuExceptionFilter().

Fast486SetSegment()

VOID NTAPI Fast486SetSegment	(	PFAST486_STATE	State,
		FAST486_SEG_REGS	Segment,
		USHORT	Selector
	)

Definition at line 242 of file fast486.c.

{
    /* Call the internal function */
    Fast486LoadSegment(State, Segment, Selector);
}

Referenced by setCS(), setDS(), setES(), setFS(), setGS(), and setSS().

Fast486SetStack()

VOID NTAPI Fast486SetStack	(	PFAST486_STATE	State,
		USHORT	Segment,
		ULONG	Offset
	)

Definition at line 227 of file fast486.c.

{
    /* Load the new SS */
    if (!Fast486LoadSegment(State, FAST486_REG_SS, Segment))
    {
        /* An exception occurred, let the handler execute instead */
        return;
    }
 
    /* Set the new SP */
    State->GeneralRegs[FAST486_REG_ESP].Long = Offset;
}

Referenced by setESP(), setSP(), and x86BiosCall().