xref: /illumos-gate/usr/src/uts/intel/sys/sysi86.h (revision 2d6eb4a5)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
28 /*	  All Rights Reserved */
29 
30 #ifndef _SYS_SYSI86_H
31 #define	_SYS_SYSI86_H
32 
33 #ifdef	__cplusplus
34 extern "C" {
35 #endif
36 
37 #ifndef DIRSIZ
38 #define	DIRSIZ	14
39 #endif
40 
41 /*
42  * Commands for sysi86 system call (1-?)
43  */
44 
45 #define	SI86SWPI	1	/* General swap interface. */
46 #define	SI86SYM		2	/* acquire boot-built symbol table */
47 #define	SI86CONF	4	/* acquire boot-built configuration table */
48 #define	SI86BOOT	5	/* acquire timestamp and name of program */
49 				/*	booted */
50 #define	SI86AUTO	9	/* was an auto-config boot done? */
51 #define	SI86EDT		10	/* copy contents of EDT to user */
52 #define	SI86SWAP	12	/* Declare swap space */
53 #define	SI86FPHW	40	/* what (if any?) floating-point hardware */
54 #define	SI86FPSTART	41	/* extended version of SI86FPHW */
55 
56 #define	GRNON		52	/* set green light to solid on state */
57 #define	GRNFLASH	53	/* start green light flashing */
58 #define	STIME		54	/* set internal time */
59 #define	SETNAME		56	/* rename the system */
60 #define	RNVR		58	/* read NVRAM */
61 #define	WNVR		59	/* write NVRAM */
62 #define	RTODC		60	/* read time of day clock */
63 #define	CHKSER		61	/* check soft serial number */
64 #define	SI86NVPRT	62	/* print an xtra_nvr structure */
65 #define	SANUPD		63	/* sanity update of kernel buffers */
66 #define	SI86KSTR	64	/* make a copy of a kernel string */
67 #define	SI86MEM		65	/* return the memory size of system */
68 #define	SI86TODEMON	66	/* Transfer control to firmware. */
69 #define	SI86CCDEMON	67	/* Control character access to demon. */
70 #define	SI86CACHE	68	/* Turn cache on and off. */
71 #define	SI86DELMEM	69	/* Delete available memory for testing. */
72 #define	SI86ADDMEM	70	/* Add back deleted memory. */
73 /*	71 through 74 reserved for VPIX */
74 #define	SI86V86		71	/* V86 system calls (see below) */
75 #define	SI86SLTIME	72	/* Set local time correction */
76 #define	SI86DSCR	75	/* Set a segment or gate descriptor */
77 #define	RDUBLK		76	/* Read U Block */
78 /* NFA entry point */
79 #define	SI86NFA		77	/* make nfa_sys system call */
80 #define	SI86VM86	81
81 #define	SI86VMENABLE	82
82 #define	SI86LIMUSER	91	/* license interface */
83 #define	SI86RDID	92	/* ROM BIOS Machid ID */
84 #define	SI86RDBOOT	93	/* Bootable Non-SCSI Hard Disk */
85 /* XENIX Support */
86 #define	SI86SHFIL	100	/* map a file into addr space of a proc */
87 #define	SI86PCHRGN	101	/* make globally visible change to a region */
88 #define	SI86BADVISE	102	/* badvise subcommand - see below for */
89 				/*	badvise subfunction definitions */
90 #define	SI86SHRGN	103	/* enable/disable XENIX small model shared */
91 				/*	data context switching */
92 #define	SI86CHIDT	104	/* set user level int 0xf0, ... 0xff handlers */
93 #define	SI86EMULRDA	105	/* remove special emulator read access */
94 
95 /*
96  *	NOTE: Numbers 106 - 110 have been registered and are reserved
97  *	for future use for AT&T hardware.
98  */
99 
100 /*
101  *	Commands for allowing the real time clock to keep local time.
102  */
103 
104 #define	WTODC		111	/* write tod clock */
105 #define	SGMTL		112	/* set GMT lag */
106 #define	GGMTL		113	/* get GMT lag */
107 #define	RTCSYNC		114	/* set UNIX 'time' based on RTC and GMT lag */
108 
109 #define	V86SC_IOPL	4	/* The only supported V86 system call */
110 
111 /*
112  *  The SI86DSCR subcommand of the sysi86() system call
113  *  sets a segment or gate descriptor in the kernel.
114  *  The following descriptor types are accepted:
115  *    - executable and data segments in the LDT at DPL 3
116  *    - a call gate in the GDT at DPL 3 that points to a segment in the LDT
117  *  The request structure declared below is used to pass the values
118  *  to be placed in the descriptor.  A pointer to the structure is
119  *  passed as the second argument of the system call.
120  *  If acc1 is zero, the descriptor is cleared.
121  */
122 
123 /*
124  * XX64 Do we need to support this for 64-bit apps?
125  *
126  * request structure passed by user
127  */
128 struct ssd {
129 	unsigned int	sel;   /* descriptor selector */
130 	unsigned int	bo;    /* segment base or gate offset */
131 	unsigned int	ls;    /* segment limit or gate selector */
132 	unsigned int	acc1;  /* access byte 5 */
133 	unsigned int	acc2;  /* access bits in byte 6 or gate count */
134 };
135 
136 #define	SI86SSD_TYPE(ssd)	((ssd)->acc1 & 0x1F)
137 #define	SI86SSD_DPL(ssd)	(((ssd)->acc1 >> 5) & 0x3)
138 #define	SI86SSD_PRES(ssd)	(((ssd)->acc1 >> 7) & 1)
139 #define	SI86SSD_ISUSEG(ssd)	(SI86SSD_TYPE(ssd) >= SDT_MEMRO)
140 #define	SI86SSD_ISLONG(ssd)	((ssd)->acc2 & 0x2)
141 
142 #ifdef _KERNEL
143 extern void usd_to_ssd(user_desc_t *, struct ssd *, selector_t);
144 extern int setdscr(struct ssd *);
145 #endif	/* _KERNEL */
146 
147 /*
148  *  The SI86SHFIL subcommand of the sysi86() system call
149  *  maps a file into a region in user address space.
150  *  The request structure declared below is used to pass the
151  *  system call parameters.  A pointer to the structure is
152  *  passed as the second argument of the system call.
153  */
154 struct mmf {
155 	char	*mf_filename;	/* path name of file */
156 	long	mf_filesz;	/* Size in bytes of section of file */
157 				/* from which this region is mapped. */
158 	long	mf_regsz;	/* Size of region in bytes */
159 	short	mf_flags;	/* Either 0 or RG_NOSHARE */
160 };
161 
162 /*
163  *  The SI86PCHRGN subcommand of the sysi86() system call
164  *  change the memory mapped image of a file.
165  *  The request structure declared below is used to pass the values
166  *  system call parameters.  A pointer to the structure is
167  *  passed as the second argument of the system call.
168  */
169 struct cmf {
170 	char	*cf_srcva;	/* modified image address */
171 	char	*cf_dstva;	/* location to patch */
172 	long	cf_count;	/* size of patch */
173 };
174 
175 /*
176  * The SI86BADVISE subcommand of the sysi86() system call specifies
177  * XENIX variant behavior for certain system calls and kernel routines.
178  * The 'arg' argument of sysi86() for SI86BADVISE is an integer.  Bits
179  * 8..15 specify SI86B_SET or SI86B_GET.  Bits 0..7 contain
180  * SI86B_PRE_SV, SI86B_XOUT, or SI86B_XSDSWTCH.  All these constants are
181  * defined below.  The 'arg' argument thus consists of either SI86B_SET
182  * OR'ed with zero or more of SI86B_PRE_SV, SI86B_XOUT, and SI86B_XSDSWTCH,
183  * or of SI86B_GET.
184  */
185 #define	SI86B_SET		0x0100	/* set badvise bits */
186 #define	SI86B_GET		0x0200	/* retrieve badvise bits */
187 
188 #define	SI86B_PRE_SV		0x0008	/* follow pre-System V x.out behavior */
189 #define	SI86B_XOUT		0x0010 	/* follow XENIX x.out behavior */
190 #define	SI86B_XSDSWTCH		0x0080	/* XENIX small model shared data */
191 					/*	context switching enabled */
192 
193 /*
194  *   The request structure declared below is used by the XENIX 286 emulator
195  *   (/bin/x286emul) in conjunction with the SI86SHRGN subcommand of sysi86().
196  *   The SI86SHRGN subcommand is used by the XENIX 286 emulator to support
197  *   XENIX shared data.  The second argument passed to sysi86() is a
198  *   pointer to an xsdbuf struct.
199  *
200  *   If the 'xsd_cmd' field of xsdbuf is SI86SHR_CP, the XENIX 286 emulator is
201  *   using the SI86SHRGN subcommand to set up XENIX small model shared data
202  *   context switching support for a given XENIX shared data segment.  In this
203  *   case, the xsdbuf struct contains the start addr for the shared data in
204  *   386 space, followed by the start addr for the shared data in the 286
205  *   executable's private data.
206  *
207  *   If the 'xsd_cmd' field is SI86SHR_SZ, the XENIX 286 emulator is using the
208  *   SI86SHRGN subcommand to retrieve the size of an existing XENIX shared
209  *   data segment.  In this case, the xsdbuf struct contains the start addr
210  *   for the shared data in 386 space.
211  *   The size of the shared data segment starting at 'xsd_386vaddr' will
212  *   be returned in the 'xsd_size' field by sysi86().
213  */
214 
215 #define	SI86SHR_CP	0x1	/* SI86SHRGN used for XENIX sd context switch */
216 #define	SI86SHR_SZ	0x2	/* SI86SHRGN used to get XENIX sd seg size */
217 
218 struct xsdbuf {
219 	unsigned xsd_cmd;	/* SI86SHRGN subcommand, either SI86SHR_CP */
220 				/* or SI86SHR_SZ. */
221 	char	*xsd_386vaddr;	/* Addr of "real" XENIX shared data seg in */
222 				/* the emulator. */
223 	union {
224 		char	*xsd_286vaddr;	/* Addr of XENIX shared data seg */
225 					/* in the 286 data portion of the */
226 					/* emulator. */
227 		unsigned long xsd_size;	/* Size of XENIX shared data seg */
228 	} xsd_un;
229 };
230 /* End XENIX Support */
231 
232 /*
233  * Cascade defines
234  */
235 
236 #define	C2	'E'
237 #define	C3	'F'
238 #define	C4	'G'
239 #define	C6	'K'
240 
241 /* Enterprise IDNO defines */
242 #define	E8R1	'R'
243 
244 #ifndef _KERNEL
245 #ifdef __STDC__
246 extern	int	sysi86(int, ...);
247 #else
248 extern	int	sysi86();
249 #endif	/* __STDC__ */
250 #endif	/* !_KERNEL */
251 
252 #ifdef	__cplusplus
253 }
254 #endif
255 
256 #endif	/* _SYS_SYSI86_H */
257