* Fast486 386/486 CPU Emulation Library
* fast486.h
*
- * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ * Copyright (C) 2014 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
#define FAST486_NUM_SEG_REGS 6
#define FAST486_NUM_CTRL_REGS 3
#define FAST486_NUM_DBG_REGS 6
+#define FAST486_NUM_FPU_REGS 8
#define FAST486_CR0_PE (1 << 0)
#define FAST486_CR0_MP (1 << 1)
#define FAST486_IDT_INT_GATE_32 0xE
#define FAST486_IDT_TRAP_GATE_32 0xF
+#define FAST486_LDT_SIGNATURE 0x02
+#define FAST486_TSS_SIGNATURE 0x09
+
#define FAST486_PREFIX_SEG (1 << 0)
#define FAST486_PREFIX_OPSIZE (1 << 1)
#define FAST486_PREFIX_ADSIZE (1 << 2)
#define FAST486_PREFIX_REPNZ (1 << 4)
#define FAST486_PREFIX_REP (1 << 5)
+#define FAST486_FPU_DEFAULT_CONTROL 0x037F
+
struct _FAST486_STATE;
typedef struct _FAST486_STATE FAST486_STATE, *PFAST486_STATE;
{
FAST486_INT_NONE = 0,
FAST486_INT_EXECUTE = 1,
- FAST486_INT_SIGNAL = 2
+ FAST486_INT_SIGNAL = 2,
+ FAST486_INT_DELAYED = 3
} FAST486_INT_STATUS, *PFAST486_INT_STATUS;
typedef
(NTAPI *FAST486_IO_READ_PROC)
(
PFAST486_STATE State,
- ULONG Port,
+ USHORT Port,
PVOID Buffer,
- ULONG Size
+ ULONG DataCount,
+ UCHAR DataSize
);
typedef
(NTAPI *FAST486_IO_WRITE_PROC)
(
PFAST486_STATE State,
- ULONG Port,
+ USHORT Port,
PVOID Buffer,
- ULONG Size
-);
-
-typedef
-VOID
-(NTAPI *FAST486_IDLE_PROC)
-(
- PFAST486_STATE State
+ ULONG DataCount,
+ UCHAR DataSize
);
typedef
ULONG DirConf : 1;
ULONG Executable : 1;
ULONG SystemType : 1;
+ ULONG Rpl : 2;
ULONG Dpl : 2;
ULONG Present : 1;
ULONG Size : 1;
ULONG Base;
} FAST486_SEG_REG, *PFAST486_SEG_REG;
+typedef struct _FAST486_LDT_REG
+{
+ USHORT Selector;
+ ULONG Base;
+ ULONG Limit;
+} FAST486_LDT_REG, *PFAST486_LDT_REG;
+
+typedef struct _FAST486_TASK_REG
+{
+ USHORT Selector;
+ ULONG Base;
+ ULONG Limit;
+ BOOLEAN Busy;
+} FAST486_TASK_REG, *PFAST486_TASK_REG;
+
+#include <pshpack1.h>
+
typedef struct
{
ULONG Limit : 16;
- ULONG Base : 24;
+ ULONG Base : 16;
+ ULONG BaseMid : 8;
ULONG Accessed : 1;
ULONG ReadWrite : 1;
ULONG DirConf : 1;
ULONG BaseHigh : 8;
} FAST486_GDT_ENTRY, *PFAST486_GDT_ENTRY;
+/* Verify the structure size */
+C_ASSERT(sizeof(FAST486_GDT_ENTRY) == sizeof(ULONGLONG));
+
+typedef struct
+{
+ ULONG Limit : 16;
+ ULONG Base : 16;
+ ULONG BaseMid : 8;
+ ULONG Signature : 5;
+ ULONG Dpl : 2;
+ ULONG Present : 1;
+ ULONG LimitHigh : 4;
+ ULONG Avl : 1;
+ ULONG Reserved : 2;
+ ULONG Granularity : 1;
+ ULONG BaseHigh : 8;
+} FAST486_SYSTEM_DESCRIPTOR, *PFAST486_SYSTEM_DESCRIPTOR;
+
+/* Verify the structure size */
+C_ASSERT(sizeof(FAST486_SYSTEM_DESCRIPTOR) == sizeof(ULONGLONG));
+
typedef struct
{
ULONG Offset : 16;
ULONG OffsetHigh : 16;
} FAST486_CALL_GATE, *PFAST486_CALL_GATE;
+/* Verify the structure size */
+C_ASSERT(sizeof(FAST486_CALL_GATE) == sizeof(ULONGLONG));
+
typedef struct
{
ULONG Offset : 16;
ULONG OffsetHigh : 16;
} FAST486_IDT_ENTRY, *PFAST486_IDT_ENTRY;
+/* Verify the structure size */
+C_ASSERT(sizeof(FAST486_IDT_ENTRY) == sizeof(ULONGLONG));
+
+#include <poppack.h>
+
typedef struct _FAST486_TABLE_REG
{
USHORT Size;
ULONG Rf : 1;
ULONG Vm : 1;
ULONG Ac : 1;
- ULONG Vif : 1;
- ULONG Vip : 1;
- ULONG Id : 1;
- // ULONG Reserved : 10;
+ // ULONG Reserved : 13;
};
} FAST486_FLAGS_REG, *PFAST486_FLAGS_REG;
ULONG IopbOffset;
} FAST486_TSS, *PFAST486_TSS;
+typedef struct _FAST486_FPU_DATA_REG
+{
+ ULONGLONG Mantissa;
+ USHORT Exponent;
+ UCHAR Sign;
+} FAST486_FPU_DATA_REG, *PFAST486_FPU_DATA_REG;
+
+typedef union _FAST486_FPU_STATUS_REG
+{
+ USHORT Value;
+
+ struct
+ {
+ ULONG Ie : 1;
+ ULONG De : 1;
+ ULONG Ze : 1;
+ ULONG Oe : 1;
+ ULONG Ue : 1;
+ ULONG Pe : 1;
+ ULONG Sf : 1;
+ ULONG Es : 1;
+ ULONG Code0 : 1;
+ ULONG Code1 : 1;
+ ULONG Code2 : 1;
+ ULONG Top : 3;
+ ULONG Code3 : 1;
+ ULONG Busy : 1;
+ };
+} FAST486_FPU_STATUS_REG, *PFAST486_FPU_STATUS_REG;
+
+typedef union _FAST486_FPU_CONTROL_REG
+{
+ USHORT Value;
+
+ struct
+ {
+ ULONG Im : 1;
+ ULONG Dm : 1;
+ ULONG Zm : 1;
+ ULONG Om : 1;
+ ULONG Um : 1;
+ ULONG Pm : 1;
+ ULONG Reserved : 2;
+ ULONG Pc : 2;
+ ULONG Rc : 2;
+ ULONG Inf : 1;
+ // ULONG Reserved1 : 3;
+ };
+} FAST486_FPU_CONTROL_REG, *PFAST486_FPU_CONTROL_REG;
+
struct _FAST486_STATE
{
FAST486_MEM_READ_PROC MemReadCallback;
FAST486_MEM_WRITE_PROC MemWriteCallback;
FAST486_IO_READ_PROC IoReadCallback;
FAST486_IO_WRITE_PROC IoWriteCallback;
- FAST486_IDLE_PROC IdleCallback;
FAST486_BOP_PROC BopCallback;
FAST486_INT_ACK_PROC IntAckCallback;
FAST486_REG GeneralRegs[FAST486_NUM_GEN_REGS];
FAST486_SEG_REG SegmentRegs[FAST486_NUM_SEG_REGS];
FAST486_REG InstPtr, SavedInstPtr;
FAST486_FLAGS_REG Flags;
- FAST486_TABLE_REG Gdtr, Idtr, Ldtr, Tss;
+ FAST486_TABLE_REG Gdtr, Idtr;
+ FAST486_LDT_REG Ldtr;
+ FAST486_TASK_REG TaskReg;
+ UCHAR Cpl;
ULONG ControlRegisters[FAST486_NUM_CTRL_REGS];
ULONG DebugRegisters[FAST486_NUM_DBG_REGS];
ULONG ExceptionCount;
ULONG PrefixFlags;
FAST486_SEG_REGS SegmentOverride;
+ BOOLEAN Halted;
FAST486_INT_STATUS IntStatus;
UCHAR PendingIntNum;
+ PULONG Tlb;
+#ifndef FAST486_NO_FPU
+ FAST486_FPU_DATA_REG FpuRegisters[FAST486_NUM_FPU_REGS];
+ FAST486_FPU_STATUS_REG FpuStatus;
+ FAST486_FPU_CONTROL_REG FpuControl;
+ USHORT FpuTag;
+#endif
};
/* FUNCTIONS ******************************************************************/
FAST486_MEM_WRITE_PROC MemWriteCallback,
FAST486_IO_READ_PROC IoReadCallback,
FAST486_IO_WRITE_PROC IoWriteCallback,
- FAST486_IDLE_PROC IdleCallback,
FAST486_BOP_PROC BopCallback,
- FAST486_INT_ACK_PROC IntAckCallback);
+ FAST486_INT_ACK_PROC IntAckCallback,
+ PULONG Tlb);
VOID
NTAPI
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