#include "emulator.h"
#include "bios.h"
#include "bop.h"
-#include "dos.h"
-#include "speaker.h"
+#include "vddsup.h"
+#include "io.h"
+#include "registers.h"
#include "vga.h"
#include "pic.h"
-#include "ps2.h"
-#include "timer.h"
-#include "cmos.h"
+
+// HACK
+typedef INT VDM_MODE;
/* PRIVATE VARIABLES **********************************************************/
static BOOLEAN A20Line = FALSE;
+/* BOP Identifiers */
+#define BOP_DEBUGGER 0x56 // Break into the debugger from a 16-bit app
+
/* PRIVATE FUNCTIONS **********************************************************/
-static VOID WINAPI EmulatorReadMemory(PFAST486_STATE State, ULONG Address, PVOID Buffer, ULONG Size)
+VOID WINAPI EmulatorReadMemory(PFAST486_STATE State, ULONG Address, PVOID Buffer, ULONG Size)
{
UNREFERENCED_PARAMETER(State);
/* Make sure the requested address is valid */
if ((Address + Size) >= MAX_ADDRESS) return;
- /* Read the data from the virtual address space and store it in the buffer */
- RtlCopyMemory(Buffer, (LPVOID)((ULONG_PTR)BaseAddress + Address), Size);
-
- /* Check if we modified the console video memory */
+ /*
+ * Check if we are going to read the VGA memory and
+ * copy it into the virtual address space if needed.
+ */
if (((Address + Size) >= VgaGetVideoBaseAddress())
&& (Address < VgaGetVideoLimitAddress()))
{
DWORD VgaAddress = max(Address, VgaGetVideoBaseAddress());
- LPBYTE VgaBuffer = (LPBYTE)((ULONG_PTR)Buffer + VgaAddress - Address);
+ DWORD ActualSize = min(Address + Size - 1, VgaGetVideoLimitAddress())
+ - VgaAddress + 1;
+ LPBYTE DestBuffer = (LPBYTE)((ULONG_PTR)BaseAddress + VgaAddress);
/* Read from the VGA memory */
- VgaReadMemory(VgaAddress, VgaBuffer, Size);
+ VgaReadMemory(VgaAddress, DestBuffer, ActualSize);
}
+
+ /* Read the data from the virtual address space and store it in the buffer */
+ RtlCopyMemory(Buffer, (LPVOID)((ULONG_PTR)BaseAddress + Address), Size);
}
-static VOID WINAPI EmulatorWriteMemory(PFAST486_STATE State, ULONG Address, PVOID Buffer, ULONG Size)
+VOID WINAPI EmulatorWriteMemory(PFAST486_STATE State, ULONG Address, PVOID Buffer, ULONG Size)
{
UNREFERENCED_PARAMETER(State);
/* Read the data from the buffer and store it in the virtual address space */
RtlCopyMemory((LPVOID)((ULONG_PTR)BaseAddress + Address), Buffer, Size);
- /* Check if we modified the console video memory */
+ /*
+ * Check if we modified the VGA memory.
+ */
if (((Address + Size) >= VgaGetVideoBaseAddress())
&& (Address < VgaGetVideoLimitAddress()))
{
DWORD VgaAddress = max(Address, VgaGetVideoBaseAddress());
- LPBYTE VgaBuffer = (LPBYTE)((ULONG_PTR)Buffer + VgaAddress - Address);
+ DWORD ActualSize = min(Address + Size - 1, VgaGetVideoLimitAddress())
+ - VgaAddress + 1;
+ LPBYTE SrcBuffer = (LPBYTE)((ULONG_PTR)BaseAddress + VgaAddress);
/* Write to the VGA memory */
- VgaWriteMemory(VgaAddress, VgaBuffer, Size);
+ VgaWriteMemory(VgaAddress, SrcBuffer, ActualSize);
}
}
-static VOID WINAPI EmulatorReadIo(PFAST486_STATE State, ULONG Port, PVOID Buffer, ULONG Size, UCHAR Width)
+UCHAR WINAPI EmulatorIntAcknowledge(PFAST486_STATE State)
{
- INT i, j;
- LPBYTE Address = (LPBYTE)Buffer;
-
- UNREFERENCED_PARAMETER(State);
-
- for (i = 0; i < Size; i++) for (j = 0; j < Width; j++)
- {
- ULONG CurrentPort = Port + j;
-
- switch (CurrentPort)
- {
- case PIC_MASTER_CMD:
- case PIC_SLAVE_CMD:
- {
- *(Address++) = PicReadCommand(CurrentPort);
- break;
- }
-
- case PIC_MASTER_DATA:
- case PIC_SLAVE_DATA:
- {
- *(Address++) = PicReadData(CurrentPort);
- break;
- }
-
- case PIT_DATA_PORT(0):
- case PIT_DATA_PORT(1):
- case PIT_DATA_PORT(2):
- {
- *(Address++) = PitReadData(CurrentPort - PIT_DATA_PORT(0));
- break;
- }
-
- case PS2_CONTROL_PORT:
- {
- *(Address++) = KeyboardReadStatus();
- break;
- }
-
- case PS2_DATA_PORT:
- {
- *(Address++) = KeyboardReadData();
- break;
- }
-
- case CMOS_DATA_PORT:
- {
- *(Address++) = CmosReadData();
- break;
- }
-
- case SPEAKER_CONTROL_PORT:
- {
- *(Address++) = SpeakerReadStatus();
- break;
- }
-
- case VGA_AC_WRITE:
- case VGA_AC_READ:
- case VGA_SEQ_INDEX:
- case VGA_SEQ_DATA:
- case VGA_DAC_READ_INDEX:
- case VGA_DAC_WRITE_INDEX:
- case VGA_DAC_DATA:
- case VGA_MISC_READ:
- case VGA_MISC_WRITE:
- case VGA_CRTC_INDEX:
- case VGA_CRTC_DATA:
- case VGA_GC_INDEX:
- case VGA_GC_DATA:
- case VGA_STAT_MONO:
- case VGA_STAT_COLOR:
- {
- *(Address++) = VgaReadPort(CurrentPort);
- break;
- }
-
- default:
- {
- DPRINT1("Read from unknown port: 0x%X\n", CurrentPort);
- }
- }
- }
-}
-
-static VOID WINAPI EmulatorWriteIo(PFAST486_STATE State, ULONG Port, PVOID Buffer, ULONG Size, UCHAR Width)
-{
- INT i, j;
- LPBYTE Address = (LPBYTE)Buffer;
-
UNREFERENCED_PARAMETER(State);
- for (i = 0; i < Size; i++) for (j = 0; j < Width; j++)
- {
- ULONG CurrentPort = Port + j;
-
- switch (CurrentPort)
- {
- case PIT_COMMAND_PORT:
- {
- PitWriteCommand(*(Address++));
- break;
- }
-
- case PIT_DATA_PORT(0):
- case PIT_DATA_PORT(1):
- case PIT_DATA_PORT(2):
- {
- PitWriteData(CurrentPort - PIT_DATA_PORT(0), *(Address++));
- break;
- }
-
- case PIC_MASTER_CMD:
- case PIC_SLAVE_CMD:
- {
- PicWriteCommand(CurrentPort, *(Address++));
- break;
- }
-
- case PIC_MASTER_DATA:
- case PIC_SLAVE_DATA:
- {
- PicWriteData(CurrentPort, *(Address++));
- break;
- }
-
- case PS2_CONTROL_PORT:
- {
- KeyboardWriteCommand(*(Address++));
- break;
- }
-
- case PS2_DATA_PORT:
- {
- KeyboardWriteData(*(Address++));
- break;
- }
-
- case CMOS_ADDRESS_PORT:
- {
- CmosWriteAddress(*(Address++));
- break;
- }
-
- case CMOS_DATA_PORT:
- {
- CmosWriteData(*(Address++));
- break;
- }
-
- case SPEAKER_CONTROL_PORT:
- {
- SpeakerWriteCommand(*(Address++));
- break;
- }
-
- case VGA_AC_WRITE:
- case VGA_AC_READ:
- case VGA_SEQ_INDEX:
- case VGA_SEQ_DATA:
- case VGA_DAC_READ_INDEX:
- case VGA_DAC_WRITE_INDEX:
- case VGA_DAC_DATA:
- case VGA_MISC_READ:
- case VGA_MISC_WRITE:
- case VGA_CRTC_INDEX:
- case VGA_CRTC_DATA:
- case VGA_GC_INDEX:
- case VGA_GC_DATA:
- case VGA_STAT_MONO:
- case VGA_STAT_COLOR:
- {
- VgaWritePort(CurrentPort, *(Address++));
- break;
- }
-
- default:
- {
- DPRINT1("Write to unknown port: 0x%X\n", CurrentPort);
- }
- }
- }
-}
-
-static VOID WINAPI EmulatorBiosOperation(PFAST486_STATE State, UCHAR BopCode)
-{
- WORD StackSegment, StackPointer;
- LPWORD Stack;
-
- /* Get the SS:SP */
- StackSegment = State->SegmentRegs[FAST486_REG_SS].Selector;
- StackPointer = State->GeneralRegs[FAST486_REG_ESP].LowWord;
-
- /* Get the stack */
- Stack = (LPWORD)SEG_OFF_TO_PTR(StackSegment, StackPointer);
-
- if (BopProc[BopCode] != NULL)
- BopProc[BopCode](Stack);
- else
- DPRINT1("Invalid BOP code %u\n", BopCode);
+ /* Get the interrupt number from the PIC */
+ return PicGetInterrupt();
}
-static UCHAR WINAPI EmulatorIntAcknowledge(PFAST486_STATE State)
+VOID WINAPI EmulatorDebugBreak(LPWORD Stack)
{
- UNREFERENCED_PARAMETER(State);
-
- /* Get the interrupt number from the PIC */
- return PicGetInterrupt();
+ DPRINT1("NTVDM: BOP_DEBUGGER\n");
+ DebugBreak();
}
/* PUBLIC FUNCTIONS ***********************************************************/
EmulatorWriteIo,
NULL,
EmulatorBiosOperation,
- EmulatorIntAcknowledge);
+ EmulatorIntAcknowledge,
+ NULL /* TODO: Use a TLB */);
/* Enable interrupts */
- EmulatorSetFlag(EMULATOR_FLAG_IF);
+ setIF(1);
+
+ /* Initialize VDD support */
+ VDDSupInitialize();
+
+ /* Register the DebugBreak BOP */
+ RegisterBop(BOP_DEBUGGER, EmulatorDebugBreak);
return TRUE;
}
if (BaseAddress != NULL) HeapFree(GetProcessHeap(), 0, BaseAddress);
}
-VOID EmulatorSetStack(WORD Segment, DWORD Offset)
-{
- Fast486SetStack(&EmulatorContext, Segment, Offset);
-}
-
// FIXME: This function assumes 16-bit mode!!!
VOID EmulatorExecute(WORD Segment, WORD Offset)
{
Fast486InterruptSignal(&EmulatorContext);
}
-ULONG EmulatorGetRegister(ULONG Register)
+VOID EmulatorStep(VOID)
{
- if (Register < EMULATOR_REG_ES)
- {
- return EmulatorContext.GeneralRegs[Register].Long;
- }
- else
- {
- return EmulatorContext.SegmentRegs[Register - EMULATOR_REG_ES].Selector;
- }
+ /* Dump the state for debugging purposes */
+ // Fast486DumpState(&EmulatorContext);
+
+ /* Execute the next instruction */
+ Fast486StepInto(&EmulatorContext);
}
-VOID EmulatorSetRegister(ULONG Register, ULONG Value)
+VOID EmulatorSetA20(BOOLEAN Enabled)
{
- if (Register < EMULATOR_REG_ES)
- {
- EmulatorContext.GeneralRegs[Register].Long = Value;
- }
- else
- {
- Fast486SetSegment(&EmulatorContext, Register - EMULATOR_REG_ES, (USHORT)Value);
- }
+ A20Line = Enabled;
}
-ULONG EmulatorGetProgramCounter(VOID)
+
+
+VOID
+WINAPI
+VDDTerminateVDM(VOID)
{
- return EmulatorContext.InstPtr.Long;
+ /* Stop the VDM */
+ VdmRunning = FALSE;
}
-BOOLEAN EmulatorGetFlag(ULONG Flag)
+PBYTE
+WINAPI
+Sim32pGetVDMPointer(IN ULONG Address,
+ IN BOOLEAN ProtectedMode)
{
- return (EmulatorContext.Flags.Long & Flag) ? TRUE : FALSE;
+ // FIXME
+ UNREFERENCED_PARAMETER(ProtectedMode);
+
+ /*
+ * HIWORD(Address) == Segment (if ProtectedMode == FALSE)
+ * or Selector (if ProtectedMode == TRUE )
+ * LOWORD(Address) == Offset
+ */
+ return (PBYTE)FAR_POINTER(Address);
}
-VOID EmulatorSetFlag(ULONG Flag)
+PBYTE
+WINAPI
+MGetVdmPointer(IN ULONG Address,
+ IN ULONG Size,
+ IN BOOLEAN ProtectedMode)
{
- EmulatorContext.Flags.Long |= Flag;
+ UNREFERENCED_PARAMETER(Size);
+ return Sim32pGetVDMPointer(Address, ProtectedMode);
}
-VOID EmulatorClearFlag(ULONG Flag)
+PVOID
+WINAPI
+VdmMapFlat(IN USHORT Segment,
+ IN ULONG Offset,
+ IN VDM_MODE Mode)
{
- EmulatorContext.Flags.Long &= ~Flag;
+ // FIXME
+ UNREFERENCED_PARAMETER(Mode);
+
+ return SEG_OFF_TO_PTR(Segment, Offset);
}
-VOID EmulatorStep(VOID)
+BOOL
+WINAPI
+VdmFlushCache(IN USHORT Segment,
+ IN ULONG Offset,
+ IN ULONG Size,
+ IN VDM_MODE Mode)
{
- /* Dump the state for debugging purposes */
- // Fast486DumpState(&EmulatorContext);
-
- /* Execute the next instruction */
- Fast486StepInto(&EmulatorContext);
+ // FIXME
+ UNIMPLEMENTED;
+ return TRUE;
}
-VOID EmulatorSetA20(BOOLEAN Enabled)
+BOOL
+WINAPI
+VdmUnmapFlat(IN USHORT Segment,
+ IN ULONG Offset,
+ IN PVOID Buffer,
+ IN VDM_MODE Mode)
{
- A20Line = Enabled;
+ // FIXME
+ UNIMPLEMENTED;
+ return TRUE;
}
/* EOF */
projects / reactos.git / blobdiff