[people/ms/u-boot.git] / board / MAI / bios_emulator / scitech / include / x86emu / regs.h

/****************************************************************************
*
*                       Realmode X86 Emulator Library
*
*               Copyright (C) 1996-1999 SciTech Software, Inc.
*                    Copyright (C) David Mosberger-Tang
*                      Copyright (C) 1999 Egbert Eich
*
*  ========================================================================
*
*  Permission to use, copy, modify, distribute, and sell this software and
*  its documentation for any purpose is hereby granted without fee,
*  provided that the above copyright notice appear in all copies and that
*  both that copyright notice and this permission notice appear in
*  supporting documentation, and that the name of the authors not be used
*  in advertising or publicity pertaining to distribution of the software
*  without specific, written prior permission.  The authors makes no
*  representations about the suitability of this software for any purpose.
*  It is provided "as is" without express or implied warranty.
*
*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
*  PERFORMANCE OF THIS SOFTWARE.
*
*  ========================================================================
*
* Language:     ANSI C
* Environment:  Any
* Developer:    Kendall Bennett
*
* Description:  Header file for x86 register definitions.
*
****************************************************************************/

#ifndef __X86EMU_REGS_H
#define __X86EMU_REGS_H

/*---------------------- Macros and type definitions ----------------------*/

#pragma pack(1)

/*
 * General EAX, EBX, ECX, EDX type registers.  Note that for
 * portability, and speed, the issue of byte swapping is not addressed
 * in the registers.  All registers are stored in the default format
 * available on the host machine.  The only critical issue is that the
 * registers should line up EXACTLY in the same manner as they do in
 * the 386.  That is:
 *
 * EAX & 0xff  === AL
 * EAX & 0xffff == AX
 *
 * etc.  The result is that alot of the calculations can then be
 * done using the native instruction set fully.
 */

#ifdef  __BIG_ENDIAN__

typedef struct {
    u32 e_reg;
    } I32_reg_t;

typedef struct {
    u16 filler0, x_reg;
    } I16_reg_t;

typedef struct {
    u8 filler0, filler1, h_reg, l_reg;
    } I8_reg_t;

#else /* !__BIG_ENDIAN__ */

typedef struct {
    u32 e_reg;
    } I32_reg_t;

typedef struct {
    u16 x_reg;
    } I16_reg_t;

typedef struct {
    u8 l_reg, h_reg;
    } I8_reg_t;

#endif /* BIG_ENDIAN */

typedef union {
    I32_reg_t   I32_reg;
    I16_reg_t   I16_reg;
    I8_reg_t    I8_reg;
    } i386_general_register;

struct i386_general_regs {
    i386_general_register A, B, C, D;
    };

typedef struct i386_general_regs Gen_reg_t;

struct i386_special_regs {
    i386_general_register SP, BP, SI, DI, IP;
    u32 FLAGS;
    };

/*
 * Segment registers here represent the 16 bit quantities
 * CS, DS, ES, SS.
 */

struct i386_segment_regs {
    u16 CS, DS, SS, ES, FS, GS;
    };

/* 8 bit registers */
#define R_AH  gen.A.I8_reg.h_reg
#define R_AL  gen.A.I8_reg.l_reg
#define R_BH  gen.B.I8_reg.h_reg
#define R_BL  gen.B.I8_reg.l_reg
#define R_CH  gen.C.I8_reg.h_reg
#define R_CL  gen.C.I8_reg.l_reg
#define R_DH  gen.D.I8_reg.h_reg
#define R_DL  gen.D.I8_reg.l_reg

/* 16 bit registers */
#define R_AX  gen.A.I16_reg.x_reg
#define R_BX  gen.B.I16_reg.x_reg
#define R_CX  gen.C.I16_reg.x_reg
#define R_DX  gen.D.I16_reg.x_reg

/* 32 bit extended registers */
#define R_EAX  gen.A.I32_reg.e_reg
#define R_EBX  gen.B.I32_reg.e_reg
#define R_ECX  gen.C.I32_reg.e_reg
#define R_EDX  gen.D.I32_reg.e_reg

/* special registers */
#define R_SP  spc.SP.I16_reg.x_reg
#define R_BP  spc.BP.I16_reg.x_reg
#define R_SI  spc.SI.I16_reg.x_reg
#define R_DI  spc.DI.I16_reg.x_reg
#define R_IP  spc.IP.I16_reg.x_reg
#define R_FLG spc.FLAGS

/* special registers */
#define R_SP  spc.SP.I16_reg.x_reg
#define R_BP  spc.BP.I16_reg.x_reg
#define R_SI  spc.SI.I16_reg.x_reg
#define R_DI  spc.DI.I16_reg.x_reg
#define R_IP  spc.IP.I16_reg.x_reg
#define R_FLG spc.FLAGS

/* special registers */
#define R_ESP  spc.SP.I32_reg.e_reg
#define R_EBP  spc.BP.I32_reg.e_reg
#define R_ESI  spc.SI.I32_reg.e_reg
#define R_EDI  spc.DI.I32_reg.e_reg
#define R_EIP  spc.IP.I32_reg.e_reg
#define R_EFLG spc.FLAGS

/* segment registers */
#define R_CS  seg.CS
#define R_DS  seg.DS
#define R_SS  seg.SS
#define R_ES  seg.ES
#define R_FS  seg.FS
#define R_GS  seg.GS

/* flag conditions   */
#define FB_CF 0x0001            /* CARRY flag  */
#define FB_PF 0x0004            /* PARITY flag */
#define FB_AF 0x0010            /* AUX  flag   */
#define FB_ZF 0x0040            /* ZERO flag   */
#define FB_SF 0x0080            /* SIGN flag   */
#define FB_TF 0x0100            /* TRAP flag   */
#define FB_IF 0x0200            /* INTERRUPT ENABLE flag */
#define FB_DF 0x0400            /* DIR flag    */
#define FB_OF 0x0800            /* OVERFLOW flag */

/* 80286 and above always have bit#1 set */
#define F_ALWAYS_ON  (0x0002)   /* flag bits always on */

/*
 * Define a mask for only those flag bits we will ever pass back
 * (via PUSHF)
 */
#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)

/* following bits masked in to a 16bit quantity */

#define F_CF 0x0001             /* CARRY flag  */
#define F_PF 0x0004             /* PARITY flag */
#define F_AF 0x0010             /* AUX  flag   */
#define F_ZF 0x0040             /* ZERO flag   */
#define F_SF 0x0080             /* SIGN flag   */
#define F_TF 0x0100             /* TRAP flag   */
#define F_IF 0x0200             /* INTERRUPT ENABLE flag */
#define F_DF 0x0400             /* DIR flag    */
#define F_OF 0x0800             /* OVERFLOW flag */

#define TOGGLE_FLAG(flag)       (M.x86.R_FLG ^= (flag))
#define SET_FLAG(flag)          (M.x86.R_FLG |= (flag))
#define CLEAR_FLAG(flag)        (M.x86.R_FLG &= ~(flag))
#define ACCESS_FLAG(flag)       (M.x86.R_FLG & (flag))
#define CLEARALL_FLAG(m)        (M.x86.R_FLG = 0)

#define CONDITIONAL_SET_FLAG(COND,FLAG) \
  if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)

#define F_PF_CALC 0x010000      /* PARITY flag has been calced    */
#define F_ZF_CALC 0x020000      /* ZERO flag has been calced      */
#define F_SF_CALC 0x040000      /* SIGN flag has been calced      */

#define F_ALL_CALC      0xff0000        /* All have been calced   */

/*
 * Emulator machine state.
 * Segment usage control.
 */
#define SYSMODE_SEG_DS_SS       0x00000001
#define SYSMODE_SEGOVR_CS       0x00000002
#define SYSMODE_SEGOVR_DS       0x00000004
#define SYSMODE_SEGOVR_ES       0x00000008
#define SYSMODE_SEGOVR_FS       0x00000010
#define SYSMODE_SEGOVR_GS       0x00000020
#define SYSMODE_SEGOVR_SS       0x00000040
#define SYSMODE_PREFIX_REPE     0x00000080
#define SYSMODE_PREFIX_REPNE    0x00000100
#define SYSMODE_PREFIX_DATA     0x00000200
#define SYSMODE_PREFIX_ADDR     0x00000400
#define SYSMODE_INTR_PENDING    0x10000000
#define SYSMODE_EXTRN_INTR      0x20000000
#define SYSMODE_HALTED          0x40000000

#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS      | \
			 SYSMODE_SEGOVR_CS      | \
			 SYSMODE_SEGOVR_DS      | \
			 SYSMODE_SEGOVR_ES      | \
			 SYSMODE_SEGOVR_FS      | \
			 SYSMODE_SEGOVR_GS      | \
			 SYSMODE_SEGOVR_SS)
#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS      | \
			 SYSMODE_SEGOVR_CS      | \
			 SYSMODE_SEGOVR_DS      | \
			 SYSMODE_SEGOVR_ES      | \
			 SYSMODE_SEGOVR_FS      | \
			 SYSMODE_SEGOVR_GS      | \
			 SYSMODE_SEGOVR_SS      | \
			 SYSMODE_PREFIX_DATA    | \
			 SYSMODE_PREFIX_ADDR)

#define  INTR_SYNCH           0x1
#define  INTR_ASYNCH          0x2
#define  INTR_HALTED          0x4

typedef struct {
    struct i386_general_regs    gen;
    struct i386_special_regs    spc;
    struct i386_segment_regs    seg;
    /*
     * MODE contains information on:
     *  REPE prefix             2 bits  repe,repne
     *  SEGMENT overrides       5 bits  normal,DS,SS,CS,ES
     *  Delayed flag set        3 bits  (zero, signed, parity)
     *  reserved                6 bits
     *  interrupt #             8 bits  instruction raised interrupt
     *  BIOS video segregs      4 bits
     *  Interrupt Pending       1 bits
     *  Extern interrupt        1 bits
     *  Halted                  1 bits
     */
    long                        mode;
    u8                          intno;
    volatile int                intr;   /* mask of pending interrupts */
    int                         debug;
#ifdef DEBUG
    int                         check;
    u16                         saved_ip;
    u16                         saved_cs;
    int                         enc_pos;
    int                         enc_str_pos;
    char                        decode_buf[32]; /* encoded byte stream  */
    char                        decoded_buf[256]; /* disassembled strings */
#endif
    } X86EMU_regs;

/****************************************************************************
REMARKS:
Structure maintaining the emulator machine state.

MEMBERS:
x86             - X86 registers
mem_base        - Base real mode memory for the emulator
mem_size        - Size of the real mode memory block for the emulator
****************************************************************************/
typedef struct {
    X86EMU_regs     x86;
    unsigned long   mem_base;
    unsigned long   mem_size;
    void*           private;
    } X86EMU_sysEnv;

#pragma pack()

/*----------------------------- Global Variables --------------------------*/

#ifdef  __cplusplus
extern "C" {                        /* Use "C" linkage when in C++ mode */
#endif

/* Global emulator machine state.
 *
 * We keep it global to avoid pointer dereferences in the code for speed.
 */

extern    X86EMU_sysEnv _X86EMU_env;
#define   M             _X86EMU_env

/*-------------------------- Function Prototypes --------------------------*/

/* Function to log information at runtime */

/*void    printk(const char *fmt, ...); */

#ifdef  __cplusplus
}                                   /* End of "C" linkage for C++       */
#endif

#endif /* __X86EMU_REGS_H */
Commit	Line	Data
c7de829c WD	1	/****************************************************************************
	2	*
	3	* Realmode X86 Emulator Library
	4	*
	5	* Copyright (C) 1996-1999 SciTech Software, Inc.
	6	* Copyright (C) David Mosberger-Tang
	7	* Copyright (C) 1999 Egbert Eich
	8	*
	9	* ========================================================================
	10	*
	11	* Permission to use, copy, modify, distribute, and sell this software and
	12	* its documentation for any purpose is hereby granted without fee,
	13	* provided that the above copyright notice appear in all copies and that
	14	* both that copyright notice and this permission notice appear in
	15	* supporting documentation, and that the name of the authors not be used
	16	* in advertising or publicity pertaining to distribution of the software
	17	* without specific, written prior permission. The authors makes no
	18	* representations about the suitability of this software for any purpose.
	19	* It is provided "as is" without express or implied warranty.
	20	*
	21	* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
	22	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
	23	* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
	24	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
	25	* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
	26	* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
	27	* PERFORMANCE OF THIS SOFTWARE.
	28	*
	29	* ========================================================================
	30	*
	31	* Language: ANSI C
	32	* Environment: Any
	33	* Developer: Kendall Bennett
	34	*
	35	* Description: Header file for x86 register definitions.
	36	*
	37	****************************************************************************/
	38
	39	#ifndef __X86EMU_REGS_H
	40	#define __X86EMU_REGS_H
	41
	42	/---------------------- Macros and type definitions ----------------------/
	43
	44	#pragma pack(1)
	45
	46	/*
	47	* General EAX, EBX, ECX, EDX type registers. Note that for
	48	* portability, and speed, the issue of byte swapping is not addressed
	49	* in the registers. All registers are stored in the default format
	50	* available on the host machine. The only critical issue is that the
	51	* registers should line up EXACTLY in the same manner as they do in
	52	* the 386. That is:
	53	*
	54	* EAX & 0xff === AL
	55	* EAX & 0xffff == AX
	56	*
	57	* etc. The result is that alot of the calculations can then be
	58	* done using the native instruction set fully.
	59	*/
	60
	61	#ifdef __BIG_ENDIAN__
	62
	63	typedef struct {
	64	u32 e_reg;
65	} I32_reg_t;
66
67	typedef struct {
68	u16 filler0, x_reg;
69	} I16_reg_t;
70
71	typedef struct {
72	u8 filler0, filler1, h_reg, l_reg;
73	} I8_reg_t;
74
75	#else /* !__BIG_ENDIAN__ */
76
77	typedef struct {
78	u32 e_reg;
79	} I32_reg_t;
80
81	typedef struct {
82	u16 x_reg;
83	} I16_reg_t;
84
85	typedef struct {
86	u8 l_reg, h_reg;
87	} I8_reg_t;
88
89	#endif /* BIG_ENDIAN */
90
91	typedef union {
92	I32_reg_t I32_reg;
93	I16_reg_t I16_reg;
94	I8_reg_t I8_reg;
95	} i386_general_register;
96
97	struct i386_general_regs {
98	i386_general_register A, B, C, D;
99	};
100
101	typedef struct i386_general_regs Gen_reg_t;
102
103	struct i386_special_regs {
104	i386_general_register SP, BP, SI, DI, IP;
105	u32 FLAGS;
106	};
107
8bde7f77	108	/*
c7de829c WD	109	* Segment registers here represent the 16 bit quantities
	110	* CS, DS, ES, SS.
	111	*/
	112
	113	struct i386_segment_regs {
	114	u16 CS, DS, SS, ES, FS, GS;
	115	};
	116
	117	/* 8 bit registers */
	118	#define R_AH gen.A.I8_reg.h_reg
	119	#define R_AL gen.A.I8_reg.l_reg
	120	#define R_BH gen.B.I8_reg.h_reg
	121	#define R_BL gen.B.I8_reg.l_reg
	122	#define R_CH gen.C.I8_reg.h_reg
	123	#define R_CL gen.C.I8_reg.l_reg
	124	#define R_DH gen.D.I8_reg.h_reg
	125	#define R_DL gen.D.I8_reg.l_reg
	126
	127	/* 16 bit registers */
	128	#define R_AX gen.A.I16_reg.x_reg
	129	#define R_BX gen.B.I16_reg.x_reg
	130	#define R_CX gen.C.I16_reg.x_reg
	131	#define R_DX gen.D.I16_reg.x_reg
	132
	133	/* 32 bit extended registers */
	134	#define R_EAX gen.A.I32_reg.e_reg
	135	#define R_EBX gen.B.I32_reg.e_reg
	136	#define R_ECX gen.C.I32_reg.e_reg
	137	#define R_EDX gen.D.I32_reg.e_reg
	138
	139	/* special registers */
	140	#define R_SP spc.SP.I16_reg.x_reg
	141	#define R_BP spc.BP.I16_reg.x_reg
	142	#define R_SI spc.SI.I16_reg.x_reg
	143	#define R_DI spc.DI.I16_reg.x_reg
	144	#define R_IP spc.IP.I16_reg.x_reg
	145	#define R_FLG spc.FLAGS
	146
	147	/* special registers */
	148	#define R_SP spc.SP.I16_reg.x_reg
	149	#define R_BP spc.BP.I16_reg.x_reg
	150	#define R_SI spc.SI.I16_reg.x_reg
	151	#define R_DI spc.DI.I16_reg.x_reg
	152	#define R_IP spc.IP.I16_reg.x_reg
	153	#define R_FLG spc.FLAGS
	154
	155	/* special registers */
	156	#define R_ESP spc.SP.I32_reg.e_reg
	157	#define R_EBP spc.BP.I32_reg.e_reg
	158	#define R_ESI spc.SI.I32_reg.e_reg
	159	#define R_EDI spc.DI.I32_reg.e_reg
	160	#define R_EIP spc.IP.I32_reg.e_reg
	161	#define R_EFLG spc.FLAGS
	162
	163	/* segment registers */
	164	#define R_CS seg.CS
	165	#define R_DS seg.DS
	166	#define R_SS seg.SS
	167	#define R_ES seg.ES
	168	#define R_FS seg.FS
	169	#define R_GS seg.GS
	170
	171	/* flag conditions */
	172	#define FB_CF 0x0001 /* CARRY flag */
173	#define FB_PF 0x0004 /* PARITY flag */
174	#define FB_AF 0x0010 /* AUX flag */
175	#define FB_ZF 0x0040 /* ZERO flag */
176	#define FB_SF 0x0080 /* SIGN flag */
177	#define FB_TF 0x0100 /* TRAP flag */
178	#define FB_IF 0x0200 /* INTERRUPT ENABLE flag */
179	#define FB_DF 0x0400 /* DIR flag */
180	#define FB_OF 0x0800 /* OVERFLOW flag */
181
182	/* 80286 and above always have bit#1 set */
183	#define F_ALWAYS_ON (0x0002) /* flag bits always on */
184
185	/*
8bde7f77 WD	186	* Define a mask for only those flag bits we will ever pass back
8bde7f77 WD	187	* (via PUSHF)
c7de829c WD	188	*/
	189	#define F_MSK (FB_CF\|FB_PF\|FB_AF\|FB_ZF\|FB_SF\|FB_TF\|FB_IF\|FB_DF\|FB_OF)
	190
	191	/* following bits masked in to a 16bit quantity */
	192
	193	#define F_CF 0x0001 /* CARRY flag */
	194	#define F_PF 0x0004 /* PARITY flag */
	195	#define F_AF 0x0010 /* AUX flag */
	196	#define F_ZF 0x0040 /* ZERO flag */
	197	#define F_SF 0x0080 /* SIGN flag */
	198	#define F_TF 0x0100 /* TRAP flag */
	199	#define F_IF 0x0200 /* INTERRUPT ENABLE flag */
	200	#define F_DF 0x0400 /* DIR flag */
	201	#define F_OF 0x0800 /* OVERFLOW flag */
	202
	203	#define TOGGLE_FLAG(flag) (M.x86.R_FLG ^= (flag))
	204	#define SET_FLAG(flag) (M.x86.R_FLG \|= (flag))
	205	#define CLEAR_FLAG(flag) (M.x86.R_FLG &= ~(flag))
	206	#define ACCESS_FLAG(flag) (M.x86.R_FLG & (flag))
	207	#define CLEARALL_FLAG(m) (M.x86.R_FLG = 0)
	208
	209	#define CONDITIONAL_SET_FLAG(COND,FLAG) \
	210	if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
	211
	212	#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
	213	#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
	214	#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
	215
	216	#define F_ALL_CALC 0xff0000 /* All have been calced */
	217
	218	/*
	219	* Emulator machine state.
	220	* Segment usage control.
	221	*/
	222	#define SYSMODE_SEG_DS_SS 0x00000001
	223	#define SYSMODE_SEGOVR_CS 0x00000002
	224	#define SYSMODE_SEGOVR_DS 0x00000004
	225	#define SYSMODE_SEGOVR_ES 0x00000008
	226	#define SYSMODE_SEGOVR_FS 0x00000010
	227	#define SYSMODE_SEGOVR_GS 0x00000020
	228	#define SYSMODE_SEGOVR_SS 0x00000040
	229	#define SYSMODE_PREFIX_REPE 0x00000080
	230	#define SYSMODE_PREFIX_REPNE 0x00000100
	231	#define SYSMODE_PREFIX_DATA 0x00000200
	232	#define SYSMODE_PREFIX_ADDR 0x00000400
	233	#define SYSMODE_INTR_PENDING 0x10000000
	234	#define SYSMODE_EXTRN_INTR 0x20000000
	235	#define SYSMODE_HALTED 0x40000000
	236
	237	#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS \| \
8bde7f77 WD	238	SYSMODE_SEGOVR_CS \| \
	239	SYSMODE_SEGOVR_DS \| \
	240	SYSMODE_SEGOVR_ES \| \
	241	SYSMODE_SEGOVR_FS \| \
	242	SYSMODE_SEGOVR_GS \| \
	243	SYSMODE_SEGOVR_SS)
c7de829c	244	#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS \| \
8bde7f77 WD	245	SYSMODE_SEGOVR_CS \| \
	246	SYSMODE_SEGOVR_DS \| \
	247	SYSMODE_SEGOVR_ES \| \
	248	SYSMODE_SEGOVR_FS \| \
	249	SYSMODE_SEGOVR_GS \| \
	250	SYSMODE_SEGOVR_SS \| \
	251	SYSMODE_PREFIX_DATA \| \
	252	SYSMODE_PREFIX_ADDR)
c7de829c WD	253
	254	#define INTR_SYNCH 0x1
	255	#define INTR_ASYNCH 0x2
	256	#define INTR_HALTED 0x4
	257
	258	typedef struct {
	259	struct i386_general_regs gen;
	260	struct i386_special_regs spc;
	261	struct i386_segment_regs seg;
	262	/*
	263	* MODE contains information on:
	264	* REPE prefix 2 bits repe,repne
	265	* SEGMENT overrides 5 bits normal,DS,SS,CS,ES
	266	* Delayed flag set 3 bits (zero, signed, parity)
	267	* reserved 6 bits
	268	* interrupt # 8 bits instruction raised interrupt
8bde7f77 WD	269	* BIOS video segregs 4 bits
8bde7f77 WD	270	* Interrupt Pending 1 bits
c7de829c WD	271	* Extern interrupt 1 bits
	272	* Halted 1 bits
	273	*/
	274	long mode;
	275	u8 intno;
	276	volatile int intr; /* mask of pending interrupts */
	277	int debug;
	278	#ifdef DEBUG
	279	int check;
	280	u16 saved_ip;
	281	u16 saved_cs;
	282	int enc_pos;
	283	int enc_str_pos;
	284	char decode_buf[32]; /* encoded byte stream */
	285	char decoded_buf[256]; /* disassembled strings */
	286	#endif
	287	} X86EMU_regs;
	288
	289	/****************************************************************************
	290	REMARKS:
	291	Structure maintaining the emulator machine state.
	292
	293	MEMBERS:
	294	x86 - X86 registers
	295	mem_base - Base real mode memory for the emulator
	296	mem_size - Size of the real mode memory block for the emulator
	297	****************************************************************************/
	298	typedef struct {
	299	X86EMU_regs x86;
	300	unsigned long mem_base;
	301	unsigned long mem_size;
	302	void* private;
	303	} X86EMU_sysEnv;
	304
	305	#pragma pack()
	306
	307	/----------------------------- Global Variables --------------------------/
	308
	309	#ifdef __cplusplus
	310	extern "C" { /* Use "C" linkage when in C++ mode */
	311	#endif
	312
	313	/* Global emulator machine state.
	314	*
	315	* We keep it global to avoid pointer dereferences in the code for speed.
	316	*/
	317
	318	extern X86EMU_sysEnv _X86EMU_env;
	319	#define M _X86EMU_env
8bde7f77	320
c7de829c WD	321	/-------------------------- Function Prototypes --------------------------/
	322
	323	/* Function to log information at runtime */
	324
8bde7f77	325	/void printk(const char fmt, ...); */
c7de829c WD	326
	327	#ifdef __cplusplus
	328	} /* End of "C" linkage for C++ */
	329	#endif
	330
	331	#endif /* __X86EMU_REGS_H */