[deb_xorg-server.git] / hw / xfree86 / x86emu / 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 ----------------------*/

#ifdef PACK
#pragma PACK
#endif

/*
 * 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.
 */

#if defined(__sun) && defined(CS) /* avoid conflicts with Solaris sys/regset.h */
# undef CS
# undef DS
# undef SS
# undef ES
# undef FS
# undef GS
#endif

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
     */
    u32 mode;
    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
    u8 intno;
    u8 __pad[3];
} X86EMU_regs;

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

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

#ifdef END_PACK
#pragma END_PACK
#endif

/*----------------------------- 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
a09e091a JB	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	#ifdef PACK
	45	#pragma PACK
	46	#endif
	47
	48	/*
	49	* General EAX, EBX, ECX, EDX type registers. Note that for
	50	* portability, and speed, the issue of byte swapping is not addressed
	51	* in the registers. All registers are stored in the default format
	52	* available on the host machine. The only critical issue is that the
	53	* registers should line up EXACTLY in the same manner as they do in
	54	* the 386. That is:
	55	*
	56	* EAX & 0xff === AL
	57	* EAX & 0xffff == AX
	58	*
	59	* etc. The result is that alot of the calculations can then be
	60	* done using the native instruction set fully.
	61	*/
	62
	63	#ifdef __BIG_ENDIAN__
	64
65	typedef struct {
66	u32 e_reg;
67	} I32_reg_t;
68
69	typedef struct {
70	u16 filler0, x_reg;
71	} I16_reg_t;
72
73	typedef struct {
74	u8 filler0, filler1, h_reg, l_reg;
75	} I8_reg_t;
76
77	#else /* !__BIG_ENDIAN__ */
78
79	typedef struct {
80	u32 e_reg;
81	} I32_reg_t;
82
83	typedef struct {
84	u16 x_reg;
85	} I16_reg_t;
86
87	typedef struct {
88	u8 l_reg, h_reg;
89	} I8_reg_t;
90
91	#endif /* BIG_ENDIAN */
92
93	typedef union {
94	I32_reg_t I32_reg;
95	I16_reg_t I16_reg;
96	I8_reg_t I8_reg;
97	} i386_general_register;
98
99	struct i386_general_regs {
100	i386_general_register A, B, C, D;
101	};
102
103	typedef struct i386_general_regs Gen_reg_t;
104
105	struct i386_special_regs {
106	i386_general_register SP, BP, SI, DI, IP;
107	u32 FLAGS;
108	};
109
110	/*
111	* Segment registers here represent the 16 bit quantities
112	* CS, DS, ES, SS.
113	*/
114
115	#if defined(__sun) && defined(CS) /* avoid conflicts with Solaris sys/regset.h */
116	# undef CS
117	# undef DS
118	# undef SS
119	# undef ES
120	# undef FS
121	# undef GS
122	#endif
123
124	struct i386_segment_regs {
125	u16 CS, DS, SS, ES, FS, GS;
126	};
127
128	/* 8 bit registers */
129	#define R_AH gen.A.I8_reg.h_reg
130	#define R_AL gen.A.I8_reg.l_reg
131	#define R_BH gen.B.I8_reg.h_reg
132	#define R_BL gen.B.I8_reg.l_reg
133	#define R_CH gen.C.I8_reg.h_reg
134	#define R_CL gen.C.I8_reg.l_reg
135	#define R_DH gen.D.I8_reg.h_reg
136	#define R_DL gen.D.I8_reg.l_reg
137
138	/* 16 bit registers */
139	#define R_AX gen.A.I16_reg.x_reg
140	#define R_BX gen.B.I16_reg.x_reg
141	#define R_CX gen.C.I16_reg.x_reg
142	#define R_DX gen.D.I16_reg.x_reg
143
144	/* 32 bit extended registers */
145	#define R_EAX gen.A.I32_reg.e_reg
146	#define R_EBX gen.B.I32_reg.e_reg
147	#define R_ECX gen.C.I32_reg.e_reg
148	#define R_EDX gen.D.I32_reg.e_reg
149
150	/* special registers */
151	#define R_SP spc.SP.I16_reg.x_reg
152	#define R_BP spc.BP.I16_reg.x_reg
153	#define R_SI spc.SI.I16_reg.x_reg
154	#define R_DI spc.DI.I16_reg.x_reg
155	#define R_IP spc.IP.I16_reg.x_reg
156	#define R_FLG spc.FLAGS
157
158	/* special registers */
159	#define R_SP spc.SP.I16_reg.x_reg
160	#define R_BP spc.BP.I16_reg.x_reg
161	#define R_SI spc.SI.I16_reg.x_reg
162	#define R_DI spc.DI.I16_reg.x_reg
163	#define R_IP spc.IP.I16_reg.x_reg
164	#define R_FLG spc.FLAGS
165
166	/* special registers */
167	#define R_ESP spc.SP.I32_reg.e_reg
168	#define R_EBP spc.BP.I32_reg.e_reg
169	#define R_ESI spc.SI.I32_reg.e_reg
170	#define R_EDI spc.DI.I32_reg.e_reg
171	#define R_EIP spc.IP.I32_reg.e_reg
172	#define R_EFLG spc.FLAGS
173
174	/* segment registers */
175	#define R_CS seg.CS
176	#define R_DS seg.DS
177	#define R_SS seg.SS
178	#define R_ES seg.ES
179	#define R_FS seg.FS
180	#define R_GS seg.GS
181
182	/* flag conditions */
183	#define FB_CF 0x0001 /* CARRY flag */
184	#define FB_PF 0x0004 /* PARITY flag */
185	#define FB_AF 0x0010 /* AUX flag */
186	#define FB_ZF 0x0040 /* ZERO flag */
187	#define FB_SF 0x0080 /* SIGN flag */
188	#define FB_TF 0x0100 /* TRAP flag */
189	#define FB_IF 0x0200 /* INTERRUPT ENABLE flag */
190	#define FB_DF 0x0400 /* DIR flag */
191	#define FB_OF 0x0800 /* OVERFLOW flag */
192
193	/* 80286 and above always have bit#1 set */
194	#define F_ALWAYS_ON (0x0002) /* flag bits always on */
195
196	/*
197	* Define a mask for only those flag bits we will ever pass back
198	* (via PUSHF)
199	*/
200	#define F_MSK (FB_CF\|FB_PF\|FB_AF\|FB_ZF\|FB_SF\|FB_TF\|FB_IF\|FB_DF\|FB_OF)
201
202	/* following bits masked in to a 16bit quantity */
203
204	#define F_CF 0x0001 /* CARRY flag */
205	#define F_PF 0x0004 /* PARITY flag */
206	#define F_AF 0x0010 /* AUX flag */
207	#define F_ZF 0x0040 /* ZERO flag */
208	#define F_SF 0x0080 /* SIGN flag */
209	#define F_TF 0x0100 /* TRAP flag */
210	#define F_IF 0x0200 /* INTERRUPT ENABLE flag */
211	#define F_DF 0x0400 /* DIR flag */
212	#define F_OF 0x0800 /* OVERFLOW flag */
213
214	#define TOGGLE_FLAG(flag) (M.x86.R_FLG ^= (flag))
215	#define SET_FLAG(flag) (M.x86.R_FLG \|= (flag))
216	#define CLEAR_FLAG(flag) (M.x86.R_FLG &= ~(flag))
217	#define ACCESS_FLAG(flag) (M.x86.R_FLG & (flag))
218	#define CLEARALL_FLAG(m) (M.x86.R_FLG = 0)
219
220	#define CONDITIONAL_SET_FLAG(COND,FLAG) \
221	if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
222
223	#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
224	#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
225	#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
226
227	#define F_ALL_CALC 0xff0000 /* All have been calced */
228
229	/*
230	* Emulator machine state.
231	* Segment usage control.
232	*/
233	#define SYSMODE_SEG_DS_SS 0x00000001
234	#define SYSMODE_SEGOVR_CS 0x00000002
235	#define SYSMODE_SEGOVR_DS 0x00000004
236	#define SYSMODE_SEGOVR_ES 0x00000008
237	#define SYSMODE_SEGOVR_FS 0x00000010
238	#define SYSMODE_SEGOVR_GS 0x00000020
239	#define SYSMODE_SEGOVR_SS 0x00000040
240	#define SYSMODE_PREFIX_REPE 0x00000080
241	#define SYSMODE_PREFIX_REPNE 0x00000100
242	#define SYSMODE_PREFIX_DATA 0x00000200
243	#define SYSMODE_PREFIX_ADDR 0x00000400
244	#define SYSMODE_INTR_PENDING 0x10000000
245	#define SYSMODE_EXTRN_INTR 0x20000000
246	#define SYSMODE_HALTED 0x40000000
247
248	#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS \| \
249	SYSMODE_SEGOVR_CS \| \
250	SYSMODE_SEGOVR_DS \| \
251	SYSMODE_SEGOVR_ES \| \
252	SYSMODE_SEGOVR_FS \| \
253	SYSMODE_SEGOVR_GS \| \
254	SYSMODE_SEGOVR_SS)
255	#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS \| \
256	SYSMODE_SEGOVR_CS \| \
257	SYSMODE_SEGOVR_DS \| \
258	SYSMODE_SEGOVR_ES \| \
259	SYSMODE_SEGOVR_FS \| \
260	SYSMODE_SEGOVR_GS \| \
261	SYSMODE_SEGOVR_SS \| \
262	SYSMODE_PREFIX_DATA \| \
263	SYSMODE_PREFIX_ADDR)
264
265	#define INTR_SYNCH 0x1
266	#define INTR_ASYNCH 0x2
267	#define INTR_HALTED 0x4
268
269	typedef struct {
270	struct i386_general_regs gen;
271	struct i386_special_regs spc;
272	struct i386_segment_regs seg;
273	/*
274	* MODE contains information on:
275	* REPE prefix 2 bits repe,repne
276	* SEGMENT overrides 5 bits normal,DS,SS,CS,ES
277	* Delayed flag set 3 bits (zero, signed, parity)
278	* reserved 6 bits
279	* interrupt # 8 bits instruction raised interrupt
280	* BIOS video segregs 4 bits
281	* Interrupt Pending 1 bits
282	* Extern interrupt 1 bits
283	* Halted 1 bits
284	*/
285	u32 mode;
286	volatile int intr; /* mask of pending interrupts */
287	int debug;
288	#ifdef DEBUG
289	int check;
290	u16 saved_ip;
291	u16 saved_cs;
292	int enc_pos;
293	int enc_str_pos;
294	char decode_buf[32]; /* encoded byte stream */
295	char decoded_buf[256]; /* disassembled strings */
296	#endif
297	u8 intno;
298	u8 __pad[3];
299	} X86EMU_regs;
300
301	/****************************************************************************
302	REMARKS:
303	Structure maintaining the emulator machine state.
304
305	MEMBERS:
306	mem_base - Base real mode memory for the emulator
307	mem_size - Size of the real mode memory block for the emulator
308	private - private data pointer
309	x86 - X86 registers
310	****************************************************************************/
311	typedef struct {
312	unsigned long mem_base;
313	unsigned long mem_size;
314	void *private;
315	X86EMU_regs x86;
316	} X86EMU_sysEnv;
317
318	#ifdef END_PACK
319	#pragma END_PACK
320	#endif
321
322	/----------------------------- Global Variables --------------------------/
323
324	#ifdef __cplusplus
325	extern "C" { /* Use "C" linkage when in C++ mode */
326	#endif
327
328	/* Global emulator machine state.
329	*
330	* We keep it global to avoid pointer dereferences in the code for speed.
331	*/
332
333	extern X86EMU_sysEnv _X86EMU_env;
334	#define M _X86EMU_env
335
336	/-------------------------- Function Prototypes --------------------------/
337
338	/* Function to log information at runtime */
339
340	void printk(const char *fmt, ...);
341
342	#ifdef __cplusplus
343	} /* End of "C" linkage for C++ */
344	#endif
345	#endif /* __X86EMU_REGS_H */