* Fast486 386/486 CPU Emulation Library
* fast486.h
*
- * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ * Copyright (C) 2015 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_DR4_RESERVED 0xFFFF1FF0
#define FAST486_DR5_RESERVED 0x0000DC00
-#define FAST486_IDT_TASK_GATE 0x5
-#define FAST486_IDT_INT_GATE 0x6
-#define FAST486_IDT_TRAP_GATE 0x7
-#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_TSS_16_SIGNATURE 0x01
+#define FAST486_LDT_SIGNATURE 0x02
+#define FAST486_BUSY_TSS_16_SIGNATURE 0x03
+#define FAST486_CALL_GATE_16_SIGNATURE 0x04
+#define FAST486_TASK_GATE_SIGNATURE 0x05
+#define FAST486_IDT_INT_GATE 0x06
+#define FAST486_IDT_TRAP_GATE 0x07
+#define FAST486_TSS_SIGNATURE 0x09
+#define FAST486_BUSY_TSS_SIGNATURE 0x0B
+#define FAST486_CALL_GATE_SIGNATURE 0x0C
+#define FAST486_IDT_INT_GATE_32 0x0E
+#define FAST486_IDT_TRAP_GATE_32 0x0F
#define FAST486_PREFIX_SEG (1 << 0)
#define FAST486_PREFIX_OPSIZE (1 << 1)
#define FAST486_PREFIX_REPNZ (1 << 4)
#define FAST486_PREFIX_REP (1 << 5)
+#define FAST486_FPU_DEFAULT_CONTROL 0x037F
+
+#define FAST486_PAGE_SIZE 4096
+#define FAST486_CACHE_SIZE 32
+
+/*
+ * These are condiciones sine quibus non that should be respected, because
+ * otherwise when fetching DWORDs you would read extra garbage bytes
+ * (by reading outside of the prefetch buffer). The prefetch cache must
+ * also not cross a page boundary.
+ */
+C_ASSERT((FAST486_CACHE_SIZE >= sizeof(DWORD))
+ && (FAST486_CACHE_SIZE <= FAST486_PAGE_SIZE));
+
struct _FAST486_STATE;
typedef struct _FAST486_STATE FAST486_STATE, *PFAST486_STATE;
FAST486_EXCEPTION_MC = 0x12
} FAST486_EXCEPTIONS, *PFAST486_EXCEPTIONS;
-typedef enum _FAST486_INT_STATUS
-{
- FAST486_INT_NONE = 0,
- FAST486_INT_EXECUTE = 1,
- FAST486_INT_SIGNAL = 2,
- FAST486_INT_DELAYED = 3
-} FAST486_INT_STATUS, *PFAST486_INT_STATUS;
-
typedef
VOID
(NTAPI *FAST486_MEM_READ_PROC)
(NTAPI *FAST486_IO_READ_PROC)
(
PFAST486_STATE State,
- ULONG Port,
+ USHORT Port,
PVOID Buffer,
ULONG DataCount,
UCHAR DataSize
(NTAPI *FAST486_IO_WRITE_PROC)
(
PFAST486_STATE State,
- ULONG Port,
+ USHORT Port,
PVOID Buffer,
ULONG DataCount,
UCHAR DataSize
);
-typedef
-VOID
-(NTAPI *FAST486_IDLE_PROC)
-(
- PFAST486_STATE State
-);
-
typedef
VOID
(NTAPI *FAST486_BOP_PROC)
PFAST486_STATE State
);
+typedef
+VOID
+(NTAPI *FAST486_FPU_PROC)
+(
+ PFAST486_STATE State
+);
+
typedef union _FAST486_REG
{
union
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
+typedef struct _FAST486_LDT_REG
{
USHORT Selector;
ULONG Base;
ULONG Limit;
-} FAST486_LDT_REG;
+} FAST486_LDT_REG, *PFAST486_LDT_REG;
-typedef struct
+typedef struct _FAST486_TASK_REG
{
USHORT Selector;
ULONG Base;
ULONG Limit;
- BOOLEAN Busy;
} FAST486_TASK_REG, *PFAST486_TASK_REG;
-#pragma pack(push, 1)
+#include <pshpack1.h>
typedef struct
{
/* Verify the structure size */
C_ASSERT(sizeof(FAST486_IDT_ENTRY) == sizeof(ULONGLONG));
-#pragma pack(pop)
+typedef struct _FAST486_TSS
+{
+ ULONG Link;
+ ULONG Esp0;
+ ULONG Ss0;
+ ULONG Esp1;
+ ULONG Ss1;
+ ULONG Esp2;
+ ULONG Ss2;
+ ULONG Cr3;
+ ULONG Eip;
+ ULONG Eflags;
+ ULONG Eax;
+ ULONG Ecx;
+ ULONG Edx;
+ ULONG Ebx;
+ ULONG Esp;
+ ULONG Ebp;
+ ULONG Esi;
+ ULONG Edi;
+ ULONG Es;
+ ULONG Cs;
+ ULONG Ss;
+ ULONG Ds;
+ ULONG Fs;
+ ULONG Gs;
+ ULONG Ldtr;
+ ULONG IopbOffset;
+} FAST486_TSS, *PFAST486_TSS;
+
+typedef struct _FAST486_LEGACY_TSS
+{
+ USHORT Link;
+ USHORT Sp0;
+ USHORT Ss0;
+ USHORT Sp1;
+ USHORT Ss1;
+ USHORT Sp2;
+ USHORT Ss2;
+ USHORT Ip;
+ USHORT Flags;
+ USHORT Ax;
+ USHORT Cx;
+ USHORT Dx;
+ USHORT Bx;
+ USHORT Sp;
+ USHORT Bp;
+ USHORT Si;
+ USHORT Di;
+ USHORT Es;
+ USHORT Cs;
+ USHORT Ss;
+ USHORT Ds;
+ USHORT Ldtr;
+} FAST486_LEGACY_TSS, *PFAST486_LEGACY_TSS;
+
+#include <poppack.h>
typedef struct _FAST486_TABLE_REG
{
};
} FAST486_FLAGS_REG, *PFAST486_FLAGS_REG;
-typedef struct _FAST486_TSS
-{
- ULONG Link;
- ULONG Esp0;
- ULONG Ss0;
- ULONG Esp1;
- ULONG Ss1;
- ULONG Esp2;
- ULONG Ss2;
- ULONG Cr3;
- ULONG Eip;
- ULONG Eflags;
- ULONG Eax;
- ULONG Ecx;
- ULONG Edx;
- ULONG Ebx;
- ULONG Esp;
- ULONG Ebp;
- ULONG Esi;
- ULONG Edi;
- ULONG Es;
- ULONG Cs;
- ULONG Ss;
- ULONG Ds;
- ULONG Fs;
- ULONG Gs;
- ULONG Ldtr;
- 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 const FAST486_FPU_DATA_REG *PCFAST486_FPU_DATA_REG;
+
typedef union _FAST486_FPU_STATUS_REG
{
USHORT Value;
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_FPU_PROC FpuCallback;
FAST486_REG GeneralRegs[FAST486_NUM_GEN_REGS];
FAST486_SEG_REG SegmentRegs[FAST486_NUM_SEG_REGS];
FAST486_REG InstPtr, SavedInstPtr;
ULONG ExceptionCount;
ULONG PrefixFlags;
FAST486_SEG_REGS SegmentOverride;
- FAST486_INT_STATUS IntStatus;
- UCHAR PendingIntNum;
+ BOOLEAN Halted;
+ BOOLEAN IntSignaled;
+ BOOLEAN DoNotInterrupt;
PULONG Tlb;
+ BOOLEAN TlbEmpty;
+#ifndef FAST486_NO_PREFETCH
+ BOOLEAN PrefetchValid;
+ ULONG PrefetchAddress;
+ UCHAR PrefetchCache[FAST486_CACHE_SIZE];
+#endif
+#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;
+ FAST486_REG FpuLastInstPtr;
+ USHORT FpuLastCodeSel;
+ FAST486_REG FpuLastOpPtr;
+ USHORT FpuLastDataSel;
+#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_FPU_PROC FpuCallback,
PULONG Tlb);
VOID
NTAPI
Fast486DumpState(PFAST486_STATE State);
-VOID
-NTAPI
-Fast486Interrupt(PFAST486_STATE State, UCHAR Number);
-
VOID
NTAPI
Fast486InterruptSignal(PFAST486_STATE State);
USHORT Selector
);
+VOID
+NTAPI
+Fast486Rewind(PFAST486_STATE State);
+
#endif // _FAST486_H_
/* EOF */
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