/* PRIVATE VARIABLES **********************************************************/
-#ifndef NEW_EMULATOR
-softx86_ctx EmulatorContext;
-softx87_ctx FpuEmulatorContext;
-#else
-EMULATOR_CONTEXT EmulatorContext;
-#endif
+FAST486_STATE EmulatorContext;
static BOOLEAN A20Line = FALSE;
/* PRIVATE FUNCTIONS **********************************************************/
-#ifndef NEW_EMULATOR
-
-static VOID EmulatorReadMemory(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
+static VOID WINAPI EmulatorReadMemory(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
{
UNREFERENCED_PARAMETER(Context);
}
}
-static VOID EmulatorWriteMemory(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
+static VOID WINAPI EmulatorWriteMemory(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
{
UNREFERENCED_PARAMETER(Context);
}
}
-static VOID EmulatorReadIo(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
+static VOID WINAPI EmulatorReadIo(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
{
UNREFERENCED_PARAMETER(Context);
UNREFERENCED_PARAMETER(Size);
}
}
-static VOID EmulatorWriteIo(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
+static VOID WINAPI EmulatorWriteIo(PVOID Context, UINT Address, LPBYTE Buffer, INT Size)
{
BYTE Byte = *Buffer;
}
}
-static VOID EmulatorBop(WORD Code)
+static VOID WINAPI EmulatorBiosOperation(PFAST486_STATE State, WORD Code)
{
WORD StackSegment, StackPointer, CodeSegment, InstructionPointer;
BYTE IntNum;
LPWORD Stack;
/* Get the SS:SP */
-#ifndef NEW_EMULATOR
- StackSegment = EmulatorContext.state->segment_reg[SX86_SREG_SS].val;
- StackPointer = EmulatorContext.state->general_reg[SX86_REG_SP].val;
-#else
- StackSegment = EmulatorContext.Registers[EMULATOR_REG_SS].LowWord;
- StackPointer = EmulatorContext.Registers[EMULATOR_REG_SP].LowWord;
-#endif
+ StackSegment = State->SegmentRegs[FAST486_REG_SS].Selector;
+ StackPointer = State->GeneralRegs[FAST486_REG_ESP].LowWord;
/* Get the stack */
Stack = (LPWORD)((ULONG_PTR)BaseAddress + TO_LINEAR(StackSegment, StackPointer));
}
}
-static VOID EmulatorSoftwareInt(PVOID Context, BYTE Number)
-{
- UNREFERENCED_PARAMETER(Context);
- UNREFERENCED_PARAMETER(Number);
-
- /* Do nothing */
-}
-
-static VOID EmulatorHardwareInt(PVOID Context, BYTE Number)
-{
- UNREFERENCED_PARAMETER(Context);
- UNREFERENCED_PARAMETER(Number);
-
- /* Do nothing */
-}
-
-static VOID EmulatorHardwareIntAck(PVOID Context, BYTE Number)
-{
- UNREFERENCED_PARAMETER(Context);
- UNREFERENCED_PARAMETER(Number);
-
- /* Do nothing */
-}
-
-#endif
-
/* PUBLIC FUNCTIONS ***********************************************************/
BOOLEAN EmulatorInitialize()
BaseAddress = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, MAX_ADDRESS);
if (BaseAddress == NULL) return FALSE;
-#ifndef NEW_EMULATOR
- /* Initialize the softx86 CPU emulator */
- if (!softx86_init(&EmulatorContext, SX86_CPULEVEL_80286))
- {
- HeapFree(GetProcessHeap(), 0, BaseAddress);
- return FALSE;
- }
-
- /* Initialize the softx87 FPU emulator*/
- if(!softx87_init(&FpuEmulatorContext, SX87_FPULEVEL_8087))
- {
- softx86_free(&EmulatorContext);
- HeapFree(GetProcessHeap(), 0, BaseAddress);
- return FALSE;
- }
-
- /* Set memory read/write callbacks */
- EmulatorContext.callbacks->on_read_memory = EmulatorReadMemory;
- EmulatorContext.callbacks->on_write_memory = EmulatorWriteMemory;
+ /* Set the callbacks */
+ EmulatorContext.MemReadCallback = (FAST486_MEM_READ_PROC)EmulatorReadMemory;
+ EmulatorContext.MemWriteCallback = (FAST486_MEM_WRITE_PROC)EmulatorWriteMemory;
+ EmulatorContext.IoReadCallback = (FAST486_IO_READ_PROC)EmulatorReadIo;
+ EmulatorContext.IoWriteCallback = (FAST486_IO_WRITE_PROC)EmulatorWriteIo;
+ EmulatorContext.BopCallback = (FAST486_BOP_PROC)EmulatorBiosOperation;
- /* Set MMIO read/write callbacks */
- EmulatorContext.callbacks->on_read_io = EmulatorReadIo;
- EmulatorContext.callbacks->on_write_io = EmulatorWriteIo;
-
- /* Set interrupt callbacks */
- EmulatorContext.callbacks->on_sw_int = EmulatorSoftwareInt;
- EmulatorContext.callbacks->on_hw_int = EmulatorHardwareInt;
- EmulatorContext.callbacks->on_hw_int_ack = EmulatorHardwareIntAck;
-
- /* Connect the emulated FPU to the emulated CPU */
- softx87_connect_to_CPU(&EmulatorContext, &FpuEmulatorContext);
-#else
- // TODO: NOT IMPLEMENTED
-#endif
+ /* Reset the CPU */
+ Fast486Reset(&EmulatorContext);
/* Enable interrupts */
EmulatorSetFlag(EMULATOR_FLAG_IF);
VOID EmulatorSetStack(WORD Segment, DWORD Offset)
{
-#ifndef NEW_EMULATOR
- /* Call the softx86 API */
- softx86_set_stack_ptr(&EmulatorContext, Segment, Offset);
-#else
- // TODO: NOT IMPLEMENTED
-#endif
+ Fast486SetStack(&EmulatorContext, Segment, Offset);
}
+// FIXME: This function assumes 16-bit mode!!!
VOID EmulatorExecute(WORD Segment, WORD Offset)
{
-#ifndef NEW_EMULATOR
- /* Call the softx86 API */
- softx86_set_instruction_ptr(&EmulatorContext, Segment, Offset);
-#else
- // TODO: NOT IMPLEMENTED
-#endif
+ /* Tell Fast486 to move the instruction pointer */
+ Fast486ExecuteAt(&EmulatorContext, Segment, Offset);
}
VOID EmulatorInterrupt(BYTE Number)
{
- LPDWORD IntVecTable = (LPDWORD)((ULONG_PTR)BaseAddress);
- UINT Segment, Offset;
-
- /* Get the segment and offset */
- Segment = HIWORD(IntVecTable[Number]);
- Offset = LOWORD(IntVecTable[Number]);
-
-#ifndef NEW_EMULATOR
- /* Call the softx86 API */
- softx86_make_simple_interrupt_call(&EmulatorContext, &Segment, &Offset);
-#else
- UNREFERENCED_PARAMETER(Segment);
- UNREFERENCED_PARAMETER(Offset);
- // TODO: NOT IMPLEMENTED
-#endif
+ /* Call the Fast486 API */
+ Fast486Interrupt(&EmulatorContext, Number);
}
VOID EmulatorExternalInterrupt(BYTE Number)
{
-#ifndef NEW_EMULATOR
- /* Call the softx86 API */
- softx86_ext_hw_signal(&EmulatorContext, Number);
-#endif
+ /* Call the Fast486 API */
+ Fast486Interrupt(&EmulatorContext, Number);
}
ULONG EmulatorGetRegister(ULONG Register)
{
-#ifndef NEW_EMULATOR
if (Register < EMULATOR_REG_ES)
{
- return EmulatorContext.state->general_reg[Register].val;
+ return EmulatorContext.GeneralRegs[Register].Long;
}
else
{
- return EmulatorContext.state->segment_reg[Register - EMULATOR_REG_ES].val;
+ return EmulatorContext.SegmentRegs[Register - EMULATOR_REG_ES].Selector;
}
-#else
- return EmulatorContext.Registers[Register].Long;
-#endif
}
ULONG EmulatorGetProgramCounter(VOID)
{
-#ifndef NEW_EMULATOR
- return EmulatorContext.state->reg_ip;
-#else
- return EmulatorContext.InstructionPointer.Long;
-#endif
+ return EmulatorContext.InstPtr.Long;
}
VOID EmulatorSetRegister(ULONG Register, ULONG Value)
{
-#ifndef NEW_EMULATOR
- if (Register < EMULATOR_REG_CS)
+ if (Register < EMULATOR_REG_ES)
{
- EmulatorContext.state->general_reg[Register].val = Value;
+ EmulatorContext.GeneralRegs[Register].Long = Value;
}
else
{
- EmulatorContext.state->segment_reg[Register - EMULATOR_REG_ES].val = (WORD)Value;
+ Fast486SetSegment(&EmulatorContext, Register - EMULATOR_REG_ES, (USHORT)Value);
}
-#else
- // TODO: NOT IMPLEMENTED
-#endif
}
BOOLEAN EmulatorGetFlag(ULONG Flag)
{
-#ifndef NEW_EMULATOR
- return (EmulatorContext.state->reg_flags.val & Flag) ? TRUE : FALSE;
-#else
return (EmulatorContext.Flags.Long & Flag) ? TRUE : FALSE;
-#endif
}
VOID EmulatorSetFlag(ULONG Flag)
{
-#ifndef NEW_EMULATOR
- EmulatorContext.state->reg_flags.val |= Flag;
-#else
EmulatorContext.Flags.Long |= Flag;
-#endif
}
VOID EmulatorClearFlag(ULONG Flag)
{
-#ifndef NEW_EMULATOR
- EmulatorContext.state->reg_flags.val &= ~Flag;
-#else
EmulatorContext.Flags.Long &= ~Flag;
-#endif
}
VOID EmulatorStep(VOID)
{
-#ifndef NEW_EMULATOR
- LPWORD Instruction;
-
- /* Print the current position - useful for debugging */
- DPRINT("Executing at CS:IP = %04X:%04X\n",
- EmulatorGetRegister(EMULATOR_REG_CS),
- EmulatorContext.state->reg_ip);
+ /* Dump the state for debugging purposes */
+ // Fast486DumpState(&EmulatorContext);
- Instruction = (LPWORD)((ULONG_PTR)BaseAddress
- + TO_LINEAR(EmulatorGetRegister(EMULATOR_REG_CS),
- EmulatorContext.state->reg_ip));
-
- /* Check for the BIOS operation (BOP) sequence */
- if (Instruction[0] == EMULATOR_BOP)
- {
- /* Skip the opcodes */
- EmulatorContext.state->reg_ip += 4;
-
- // HACK: Refresh the display because the called function may wait.
- VgaRefreshDisplay();
-
- /* Call the BOP handler */
- EmulatorBop(Instruction[1]);
- }
-
- /* Call the softx86 API */
- if (!softx86_step(&EmulatorContext))
- {
- /* Invalid opcode */
- EmulatorInterrupt(EMULATOR_EXCEPTION_INVALID_OPCODE);
- }
-#else
- // TODO: NOT IMPLEMENTED
-#endif
+ /* Execute the next instruction */
+ Fast486StepInto(&EmulatorContext);
}
VOID EmulatorCleanup(VOID)
{
-#ifndef NEW_EMULATOR
- /* Free the softx86 CPU and FPU emulator */
- softx87_free(&FpuEmulatorContext);
- softx86_free(&EmulatorContext);
-#endif
-
/* Free the memory allocated for the 16-bit address space */
if (BaseAddress != NULL) HeapFree(GetProcessHeap(), 0, BaseAddress);
}
projects / reactos.git / blobdiff