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source: vbox/trunk/src/VBox/Additions/x11/x11include/xorg-server-1.4.2/regs.h

最後變更 在這個檔案是 43272,由 vboxsync 提交於 12 年 前

Additions/x11: more original X server headers.

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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
65typedef struct {
66 u32 e_reg;
67 } I32_reg_t;
68
69typedef struct {
70 u16 filler0, x_reg;
71 } I16_reg_t;
72
73typedef struct {
74 u8 filler0, filler1, h_reg, l_reg;
75 } I8_reg_t;
76
77#else /* !__BIG_ENDIAN__ */
78
79typedef struct {
80 u32 e_reg;
81 } I32_reg_t;
82
83typedef struct {
84 u16 x_reg;
85 } I16_reg_t;
86
87typedef struct {
88 u8 l_reg, h_reg;
89 } I8_reg_t;
90
91#endif /* BIG_ENDIAN */
92
93typedef union {
94 I32_reg_t I32_reg;
95 I16_reg_t I16_reg;
96 I8_reg_t I8_reg;
97 } i386_general_register;
98
99struct i386_general_regs {
100 i386_general_register A, B, C, D;
101 };
102
103typedef struct i386_general_regs Gen_reg_t;
104
105struct 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
115struct i386_segment_regs {
116 u16 CS, DS, SS, ES, FS, GS;
117 };
118
119/* 8 bit registers */
120#define R_AH gen.A.I8_reg.h_reg
121#define R_AL gen.A.I8_reg.l_reg
122#define R_BH gen.B.I8_reg.h_reg
123#define R_BL gen.B.I8_reg.l_reg
124#define R_CH gen.C.I8_reg.h_reg
125#define R_CL gen.C.I8_reg.l_reg
126#define R_DH gen.D.I8_reg.h_reg
127#define R_DL gen.D.I8_reg.l_reg
128
129/* 16 bit registers */
130#define R_AX gen.A.I16_reg.x_reg
131#define R_BX gen.B.I16_reg.x_reg
132#define R_CX gen.C.I16_reg.x_reg
133#define R_DX gen.D.I16_reg.x_reg
134
135/* 32 bit extended registers */
136#define R_EAX gen.A.I32_reg.e_reg
137#define R_EBX gen.B.I32_reg.e_reg
138#define R_ECX gen.C.I32_reg.e_reg
139#define R_EDX gen.D.I32_reg.e_reg
140
141/* special registers */
142#define R_SP spc.SP.I16_reg.x_reg
143#define R_BP spc.BP.I16_reg.x_reg
144#define R_SI spc.SI.I16_reg.x_reg
145#define R_DI spc.DI.I16_reg.x_reg
146#define R_IP spc.IP.I16_reg.x_reg
147#define R_FLG spc.FLAGS
148
149/* special registers */
150#define R_SP spc.SP.I16_reg.x_reg
151#define R_BP spc.BP.I16_reg.x_reg
152#define R_SI spc.SI.I16_reg.x_reg
153#define R_DI spc.DI.I16_reg.x_reg
154#define R_IP spc.IP.I16_reg.x_reg
155#define R_FLG spc.FLAGS
156
157/* special registers */
158#define R_ESP spc.SP.I32_reg.e_reg
159#define R_EBP spc.BP.I32_reg.e_reg
160#define R_ESI spc.SI.I32_reg.e_reg
161#define R_EDI spc.DI.I32_reg.e_reg
162#define R_EIP spc.IP.I32_reg.e_reg
163#define R_EFLG spc.FLAGS
164
165/* segment registers */
166#define R_CS seg.CS
167#define R_DS seg.DS
168#define R_SS seg.SS
169#define R_ES seg.ES
170#define R_FS seg.FS
171#define R_GS seg.GS
172
173/* flag conditions */
174#define FB_CF 0x0001 /* CARRY flag */
175#define FB_PF 0x0004 /* PARITY flag */
176#define FB_AF 0x0010 /* AUX flag */
177#define FB_ZF 0x0040 /* ZERO flag */
178#define FB_SF 0x0080 /* SIGN flag */
179#define FB_TF 0x0100 /* TRAP flag */
180#define FB_IF 0x0200 /* INTERRUPT ENABLE flag */
181#define FB_DF 0x0400 /* DIR flag */
182#define FB_OF 0x0800 /* OVERFLOW flag */
183
184/* 80286 and above always have bit#1 set */
185#define F_ALWAYS_ON (0x0002) /* flag bits always on */
186
187/*
188 * Define a mask for only those flag bits we will ever pass back
189 * (via PUSHF)
190 */
191#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
192
193/* following bits masked in to a 16bit quantity */
194
195#define F_CF 0x0001 /* CARRY flag */
196#define F_PF 0x0004 /* PARITY flag */
197#define F_AF 0x0010 /* AUX flag */
198#define F_ZF 0x0040 /* ZERO flag */
199#define F_SF 0x0080 /* SIGN flag */
200#define F_TF 0x0100 /* TRAP flag */
201#define F_IF 0x0200 /* INTERRUPT ENABLE flag */
202#define F_DF 0x0400 /* DIR flag */
203#define F_OF 0x0800 /* OVERFLOW flag */
204
205#define TOGGLE_FLAG(flag) (M.x86.R_FLG ^= (flag))
206#define SET_FLAG(flag) (M.x86.R_FLG |= (flag))
207#define CLEAR_FLAG(flag) (M.x86.R_FLG &= ~(flag))
208#define ACCESS_FLAG(flag) (M.x86.R_FLG & (flag))
209#define CLEARALL_FLAG(m) (M.x86.R_FLG = 0)
210
211#define CONDITIONAL_SET_FLAG(COND,FLAG) \
212 if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
213
214#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
215#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
216#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
217
218#define F_ALL_CALC 0xff0000 /* All have been calced */
219
220/*
221 * Emulator machine state.
222 * Segment usage control.
223 */
224#define SYSMODE_SEG_DS_SS 0x00000001
225#define SYSMODE_SEGOVR_CS 0x00000002
226#define SYSMODE_SEGOVR_DS 0x00000004
227#define SYSMODE_SEGOVR_ES 0x00000008
228#define SYSMODE_SEGOVR_FS 0x00000010
229#define SYSMODE_SEGOVR_GS 0x00000020
230#define SYSMODE_SEGOVR_SS 0x00000040
231#define SYSMODE_PREFIX_REPE 0x00000080
232#define SYSMODE_PREFIX_REPNE 0x00000100
233#define SYSMODE_PREFIX_DATA 0x00000200
234#define SYSMODE_PREFIX_ADDR 0x00000400
235#define SYSMODE_INTR_PENDING 0x10000000
236#define SYSMODE_EXTRN_INTR 0x20000000
237#define SYSMODE_HALTED 0x40000000
238
239#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS | \
240 SYSMODE_SEGOVR_CS | \
241 SYSMODE_SEGOVR_DS | \
242 SYSMODE_SEGOVR_ES | \
243 SYSMODE_SEGOVR_FS | \
244 SYSMODE_SEGOVR_GS | \
245 SYSMODE_SEGOVR_SS)
246#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS | \
247 SYSMODE_SEGOVR_CS | \
248 SYSMODE_SEGOVR_DS | \
249 SYSMODE_SEGOVR_ES | \
250 SYSMODE_SEGOVR_FS | \
251 SYSMODE_SEGOVR_GS | \
252 SYSMODE_SEGOVR_SS | \
253 SYSMODE_PREFIX_DATA | \
254 SYSMODE_PREFIX_ADDR)
255
256#define INTR_SYNCH 0x1
257#define INTR_ASYNCH 0x2
258#define INTR_HALTED 0x4
259
260typedef struct {
261 struct i386_general_regs gen;
262 struct i386_special_regs spc;
263 struct i386_segment_regs seg;
264 /*
265 * MODE contains information on:
266 * REPE prefix 2 bits repe,repne
267 * SEGMENT overrides 5 bits normal,DS,SS,CS,ES
268 * Delayed flag set 3 bits (zero, signed, parity)
269 * reserved 6 bits
270 * interrupt # 8 bits instruction raised interrupt
271 * BIOS video segregs 4 bits
272 * Interrupt Pending 1 bits
273 * Extern interrupt 1 bits
274 * Halted 1 bits
275 */
276 u32 mode;
277 volatile int intr; /* mask of pending interrupts */
278 int debug;
279#ifdef DEBUG
280 int check;
281 u16 saved_ip;
282 u16 saved_cs;
283 int enc_pos;
284 int enc_str_pos;
285 char decode_buf[32]; /* encoded byte stream */
286 char decoded_buf[256]; /* disassembled strings */
287#endif
288 u8 intno;
289 u8 __pad[3];
290 } X86EMU_regs;
291
292/****************************************************************************
293REMARKS:
294Structure maintaining the emulator machine state.
295
296MEMBERS:
297mem_base - Base real mode memory for the emulator
298mem_size - Size of the real mode memory block for the emulator
299private - private data pointer
300x86 - X86 registers
301****************************************************************************/
302typedef struct {
303 unsigned long mem_base;
304 unsigned long mem_size;
305 void* private;
306 X86EMU_regs x86;
307 } X86EMU_sysEnv;
308
309#ifdef END_PACK
310# pragma END_PACK
311#endif
312
313/*----------------------------- Global Variables --------------------------*/
314
315#ifdef __cplusplus
316extern "C" { /* Use "C" linkage when in C++ mode */
317#endif
318
319/* Global emulator machine state.
320 *
321 * We keep it global to avoid pointer dereferences in the code for speed.
322 */
323
324extern X86EMU_sysEnv _X86EMU_env;
325#define M _X86EMU_env
326
327/*-------------------------- Function Prototypes --------------------------*/
328
329/* Function to log information at runtime */
330
331void printk(const char *fmt, ...);
332
333#ifdef __cplusplus
334} /* End of "C" linkage for C++ */
335#endif
336
337#endif /* __X86EMU_REGS_H */
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