xref: /freebsd/sys/x86/include/segments.h (revision bcde3b9f673596ee5c75f05af81c53d7841299c2)
1*bcde3b9fSTijl Coosemans /*-
2*bcde3b9fSTijl Coosemans  * Copyright (c) 1989, 1990 William F. Jolitz
3*bcde3b9fSTijl Coosemans  * Copyright (c) 1990 The Regents of the University of California.
4*bcde3b9fSTijl Coosemans  * All rights reserved.
5*bcde3b9fSTijl Coosemans  *
6*bcde3b9fSTijl Coosemans  * This code is derived from software contributed to Berkeley by
7*bcde3b9fSTijl Coosemans  * William Jolitz.
8*bcde3b9fSTijl Coosemans  *
9*bcde3b9fSTijl Coosemans  * Redistribution and use in source and binary forms, with or without
10*bcde3b9fSTijl Coosemans  * modification, are permitted provided that the following conditions
11*bcde3b9fSTijl Coosemans  * are met:
12*bcde3b9fSTijl Coosemans  * 1. Redistributions of source code must retain the above copyright
13*bcde3b9fSTijl Coosemans  *    notice, this list of conditions and the following disclaimer.
14*bcde3b9fSTijl Coosemans  * 2. Redistributions in binary form must reproduce the above copyright
15*bcde3b9fSTijl Coosemans  *    notice, this list of conditions and the following disclaimer in the
16*bcde3b9fSTijl Coosemans  *    documentation and/or other materials provided with the distribution.
17*bcde3b9fSTijl Coosemans  * 4. Neither the name of the University nor the names of its contributors
18*bcde3b9fSTijl Coosemans  *    may be used to endorse or promote products derived from this software
19*bcde3b9fSTijl Coosemans  *    without specific prior written permission.
20*bcde3b9fSTijl Coosemans  *
21*bcde3b9fSTijl Coosemans  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22*bcde3b9fSTijl Coosemans  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23*bcde3b9fSTijl Coosemans  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24*bcde3b9fSTijl Coosemans  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25*bcde3b9fSTijl Coosemans  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26*bcde3b9fSTijl Coosemans  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27*bcde3b9fSTijl Coosemans  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28*bcde3b9fSTijl Coosemans  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29*bcde3b9fSTijl Coosemans  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30*bcde3b9fSTijl Coosemans  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31*bcde3b9fSTijl Coosemans  * SUCH DAMAGE.
32*bcde3b9fSTijl Coosemans  *
33*bcde3b9fSTijl Coosemans  *	from: @(#)segments.h	7.1 (Berkeley) 5/9/91
34*bcde3b9fSTijl Coosemans  * $FreeBSD$
35*bcde3b9fSTijl Coosemans  */
36*bcde3b9fSTijl Coosemans 
37*bcde3b9fSTijl Coosemans #ifndef _X86_SEGMENTS_H_
38*bcde3b9fSTijl Coosemans #define	_X86_SEGMENTS_H_
39*bcde3b9fSTijl Coosemans 
40*bcde3b9fSTijl Coosemans /*
41*bcde3b9fSTijl Coosemans  * X86 Segmentation Data Structures and definitions
42*bcde3b9fSTijl Coosemans  */
43*bcde3b9fSTijl Coosemans 
44*bcde3b9fSTijl Coosemans /*
45*bcde3b9fSTijl Coosemans  * Selectors
46*bcde3b9fSTijl Coosemans  */
47*bcde3b9fSTijl Coosemans #define	SEL_RPL_MASK	3		/* requester priv level */
48*bcde3b9fSTijl Coosemans #define	ISPL(s)		((s)&3)		/* priority level of a selector */
49*bcde3b9fSTijl Coosemans #ifdef XEN
50*bcde3b9fSTijl Coosemans #define	SEL_KPL		1		/* kernel priority level */
51*bcde3b9fSTijl Coosemans #else
52*bcde3b9fSTijl Coosemans #define	SEL_KPL		0		/* kernel priority level */
53*bcde3b9fSTijl Coosemans #endif
54*bcde3b9fSTijl Coosemans #define	SEL_UPL		3		/* user priority level */
55*bcde3b9fSTijl Coosemans #define	ISLDT(s)	((s)&SEL_LDT)	/* is it local or global */
56*bcde3b9fSTijl Coosemans #define	SEL_LDT		4		/* local descriptor table */
57*bcde3b9fSTijl Coosemans #define	IDXSEL(s)	(((s)>>3) & 0x1fff) /* index of selector */
58*bcde3b9fSTijl Coosemans #define	LSEL(s,r)	(((s)<<3) | SEL_LDT | r) /* a local selector */
59*bcde3b9fSTijl Coosemans #define	GSEL(s,r)	(((s)<<3) | r)	/* a global selector */
60*bcde3b9fSTijl Coosemans 
61*bcde3b9fSTijl Coosemans /*
62*bcde3b9fSTijl Coosemans  * User segment descriptors (%cs, %ds etc for i386 apps. 64 bit wide)
63*bcde3b9fSTijl Coosemans  * For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl,
64*bcde3b9fSTijl Coosemans  * sd_p, sd_l and sd_def32 which must be zero).  %ds only has sd_p.
65*bcde3b9fSTijl Coosemans  */
66*bcde3b9fSTijl Coosemans struct segment_descriptor {
67*bcde3b9fSTijl Coosemans 	unsigned sd_lolimit:16;		/* segment extent (lsb) */
68*bcde3b9fSTijl Coosemans 	unsigned sd_lobase:24;		/* segment base address (lsb) */
69*bcde3b9fSTijl Coosemans 	unsigned sd_type:5;		/* segment type */
70*bcde3b9fSTijl Coosemans 	unsigned sd_dpl:2;		/* segment descriptor priority level */
71*bcde3b9fSTijl Coosemans 	unsigned sd_p:1;		/* segment descriptor present */
72*bcde3b9fSTijl Coosemans 	unsigned sd_hilimit:4;		/* segment extent (msb) */
73*bcde3b9fSTijl Coosemans 	unsigned sd_xx:2;		/* unused */
74*bcde3b9fSTijl Coosemans 	unsigned sd_def32:1;		/* default 32 vs 16 bit size */
75*bcde3b9fSTijl Coosemans 	unsigned sd_gran:1;		/* limit granularity (byte/page units)*/
76*bcde3b9fSTijl Coosemans 	unsigned sd_hibase:8;		/* segment base address  (msb) */
77*bcde3b9fSTijl Coosemans } __packed;
78*bcde3b9fSTijl Coosemans 
79*bcde3b9fSTijl Coosemans struct user_segment_descriptor {
80*bcde3b9fSTijl Coosemans 	unsigned sd_lolimit:16;		/* segment extent (lsb) */
81*bcde3b9fSTijl Coosemans 	unsigned sd_lobase:24;		/* segment base address (lsb) */
82*bcde3b9fSTijl Coosemans 	unsigned sd_type:5;		/* segment type */
83*bcde3b9fSTijl Coosemans 	unsigned sd_dpl:2;		/* segment descriptor priority level */
84*bcde3b9fSTijl Coosemans 	unsigned sd_p:1;		/* segment descriptor present */
85*bcde3b9fSTijl Coosemans 	unsigned sd_hilimit:4;		/* segment extent (msb) */
86*bcde3b9fSTijl Coosemans 	unsigned sd_xx:1;		/* unused */
87*bcde3b9fSTijl Coosemans 	unsigned sd_long:1;		/* long mode (cs only) */
88*bcde3b9fSTijl Coosemans 	unsigned sd_def32:1;		/* default 32 vs 16 bit size */
89*bcde3b9fSTijl Coosemans 	unsigned sd_gran:1;		/* limit granularity (byte/page units)*/
90*bcde3b9fSTijl Coosemans 	unsigned sd_hibase:8;		/* segment base address  (msb) */
91*bcde3b9fSTijl Coosemans } __packed;
92*bcde3b9fSTijl Coosemans 
93*bcde3b9fSTijl Coosemans #define	USD_GETBASE(sd)		(((sd)->sd_lobase) | (sd)->sd_hibase << 24)
94*bcde3b9fSTijl Coosemans #define	USD_SETBASE(sd, b)	(sd)->sd_lobase = (b);	\
95*bcde3b9fSTijl Coosemans 				(sd)->sd_hibase = ((b) >> 24);
96*bcde3b9fSTijl Coosemans #define	USD_GETLIMIT(sd)	(((sd)->sd_lolimit) | (sd)->sd_hilimit << 16)
97*bcde3b9fSTijl Coosemans #define	USD_SETLIMIT(sd, l)	(sd)->sd_lolimit = (l);	\
98*bcde3b9fSTijl Coosemans 				(sd)->sd_hilimit = ((l) >> 16);
99*bcde3b9fSTijl Coosemans 
100*bcde3b9fSTijl Coosemans #ifdef __i386__
101*bcde3b9fSTijl Coosemans /*
102*bcde3b9fSTijl Coosemans  * Gate descriptors (e.g. indirect descriptors)
103*bcde3b9fSTijl Coosemans  */
104*bcde3b9fSTijl Coosemans struct gate_descriptor {
105*bcde3b9fSTijl Coosemans 	unsigned gd_looffset:16;	/* gate offset (lsb) */
106*bcde3b9fSTijl Coosemans 	unsigned gd_selector:16;	/* gate segment selector */
107*bcde3b9fSTijl Coosemans 	unsigned gd_stkcpy:5;		/* number of stack wds to cpy */
108*bcde3b9fSTijl Coosemans 	unsigned gd_xx:3;		/* unused */
109*bcde3b9fSTijl Coosemans 	unsigned gd_type:5;		/* segment type */
110*bcde3b9fSTijl Coosemans 	unsigned gd_dpl:2;		/* segment descriptor priority level */
111*bcde3b9fSTijl Coosemans 	unsigned gd_p:1;		/* segment descriptor present */
112*bcde3b9fSTijl Coosemans 	unsigned gd_hioffset:16;	/* gate offset (msb) */
113*bcde3b9fSTijl Coosemans } __packed;
114*bcde3b9fSTijl Coosemans 
115*bcde3b9fSTijl Coosemans /*
116*bcde3b9fSTijl Coosemans  * Generic descriptor
117*bcde3b9fSTijl Coosemans  */
118*bcde3b9fSTijl Coosemans union descriptor {
119*bcde3b9fSTijl Coosemans 	struct segment_descriptor sd;
120*bcde3b9fSTijl Coosemans 	struct gate_descriptor gd;
121*bcde3b9fSTijl Coosemans };
122*bcde3b9fSTijl Coosemans #else
123*bcde3b9fSTijl Coosemans /*
124*bcde3b9fSTijl Coosemans  * Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit)
125*bcde3b9fSTijl Coosemans  * Only interrupt and trap gates have gd_ist.
126*bcde3b9fSTijl Coosemans  */
127*bcde3b9fSTijl Coosemans struct gate_descriptor {
128*bcde3b9fSTijl Coosemans 	uint64_t gd_looffset:16;	/* gate offset (lsb) */
129*bcde3b9fSTijl Coosemans 	uint64_t gd_selector:16;	/* gate segment selector */
130*bcde3b9fSTijl Coosemans 	uint64_t gd_ist:3;		/* IST table index */
131*bcde3b9fSTijl Coosemans 	uint64_t gd_xx:5;		/* unused */
132*bcde3b9fSTijl Coosemans 	uint64_t gd_type:5;		/* segment type */
133*bcde3b9fSTijl Coosemans 	uint64_t gd_dpl:2;		/* segment descriptor priority level */
134*bcde3b9fSTijl Coosemans 	uint64_t gd_p:1;		/* segment descriptor present */
135*bcde3b9fSTijl Coosemans 	uint64_t gd_hioffset:48;	/* gate offset (msb) */
136*bcde3b9fSTijl Coosemans 	uint64_t sd_xx1:32;
137*bcde3b9fSTijl Coosemans } __packed;
138*bcde3b9fSTijl Coosemans 
139*bcde3b9fSTijl Coosemans /*
140*bcde3b9fSTijl Coosemans  * Generic descriptor
141*bcde3b9fSTijl Coosemans  */
142*bcde3b9fSTijl Coosemans union descriptor {
143*bcde3b9fSTijl Coosemans 	struct user_segment_descriptor sd;
144*bcde3b9fSTijl Coosemans 	struct gate_descriptor gd;
145*bcde3b9fSTijl Coosemans };
146*bcde3b9fSTijl Coosemans #endif
147*bcde3b9fSTijl Coosemans 
148*bcde3b9fSTijl Coosemans 	/* system segments and gate types */
149*bcde3b9fSTijl Coosemans #define	SDT_SYSNULL	 0	/* system null */
150*bcde3b9fSTijl Coosemans #define	SDT_SYS286TSS	 1	/* system 286 TSS available */
151*bcde3b9fSTijl Coosemans #define	SDT_SYSLDT	 2	/* system local descriptor table */
152*bcde3b9fSTijl Coosemans #define	SDT_SYS286BSY	 3	/* system 286 TSS busy */
153*bcde3b9fSTijl Coosemans #define	SDT_SYS286CGT	 4	/* system 286 call gate */
154*bcde3b9fSTijl Coosemans #define	SDT_SYSTASKGT	 5	/* system task gate */
155*bcde3b9fSTijl Coosemans #define	SDT_SYS286IGT	 6	/* system 286 interrupt gate */
156*bcde3b9fSTijl Coosemans #define	SDT_SYS286TGT	 7	/* system 286 trap gate */
157*bcde3b9fSTijl Coosemans #define	SDT_SYSNULL2	 8	/* system null again */
158*bcde3b9fSTijl Coosemans #define	SDT_SYS386TSS	 9	/* system 386 TSS available */
159*bcde3b9fSTijl Coosemans #define	SDT_SYSTSS	 9	/* system available 64 bit TSS */
160*bcde3b9fSTijl Coosemans #define	SDT_SYSNULL3	10	/* system null again */
161*bcde3b9fSTijl Coosemans #define	SDT_SYS386BSY	11	/* system 386 TSS busy */
162*bcde3b9fSTijl Coosemans #define	SDT_SYSBSY	11	/* system busy 64 bit TSS */
163*bcde3b9fSTijl Coosemans #define	SDT_SYS386CGT	12	/* system 386 call gate */
164*bcde3b9fSTijl Coosemans #define	SDT_SYSCGT	12	/* system 64 bit call gate */
165*bcde3b9fSTijl Coosemans #define	SDT_SYSNULL4	13	/* system null again */
166*bcde3b9fSTijl Coosemans #define	SDT_SYS386IGT	14	/* system 386 interrupt gate */
167*bcde3b9fSTijl Coosemans #define	SDT_SYSIGT	14	/* system 64 bit interrupt gate */
168*bcde3b9fSTijl Coosemans #define	SDT_SYS386TGT	15	/* system 386 trap gate */
169*bcde3b9fSTijl Coosemans #define	SDT_SYSTGT	15	/* system 64 bit trap gate */
170*bcde3b9fSTijl Coosemans 
171*bcde3b9fSTijl Coosemans 	/* memory segment types */
172*bcde3b9fSTijl Coosemans #define	SDT_MEMRO	16	/* memory read only */
173*bcde3b9fSTijl Coosemans #define	SDT_MEMROA	17	/* memory read only accessed */
174*bcde3b9fSTijl Coosemans #define	SDT_MEMRW	18	/* memory read write */
175*bcde3b9fSTijl Coosemans #define	SDT_MEMRWA	19	/* memory read write accessed */
176*bcde3b9fSTijl Coosemans #define	SDT_MEMROD	20	/* memory read only expand dwn limit */
177*bcde3b9fSTijl Coosemans #define	SDT_MEMRODA	21	/* memory read only expand dwn limit accessed */
178*bcde3b9fSTijl Coosemans #define	SDT_MEMRWD	22	/* memory read write expand dwn limit */
179*bcde3b9fSTijl Coosemans #define	SDT_MEMRWDA	23	/* memory read write expand dwn limit accessed*/
180*bcde3b9fSTijl Coosemans #define	SDT_MEME	24	/* memory execute only */
181*bcde3b9fSTijl Coosemans #define	SDT_MEMEA	25	/* memory execute only accessed */
182*bcde3b9fSTijl Coosemans #define	SDT_MEMER	26	/* memory execute read */
183*bcde3b9fSTijl Coosemans #define	SDT_MEMERA	27	/* memory execute read accessed */
184*bcde3b9fSTijl Coosemans #define	SDT_MEMEC	28	/* memory execute only conforming */
185*bcde3b9fSTijl Coosemans #define	SDT_MEMEAC	29	/* memory execute only accessed conforming */
186*bcde3b9fSTijl Coosemans #define	SDT_MEMERC	30	/* memory execute read conforming */
187*bcde3b9fSTijl Coosemans #define	SDT_MEMERAC	31	/* memory execute read accessed conforming */
188*bcde3b9fSTijl Coosemans 
189*bcde3b9fSTijl Coosemans /*
190*bcde3b9fSTijl Coosemans  * Size of IDT table
191*bcde3b9fSTijl Coosemans  */
192*bcde3b9fSTijl Coosemans #define	NIDT		256	/* 32 reserved, 0x80 syscall, most are h/w */
193*bcde3b9fSTijl Coosemans #define	NRSVIDT		32	/* reserved entries for cpu exceptions */
194*bcde3b9fSTijl Coosemans 
195*bcde3b9fSTijl Coosemans /*
196*bcde3b9fSTijl Coosemans  * Entries in the Interrupt Descriptor Table (IDT)
197*bcde3b9fSTijl Coosemans  */
198*bcde3b9fSTijl Coosemans #define	IDT_DE		0	/* #DE: Divide Error */
199*bcde3b9fSTijl Coosemans #define	IDT_DB		1	/* #DB: Debug */
200*bcde3b9fSTijl Coosemans #define	IDT_NMI		2	/* Nonmaskable External Interrupt */
201*bcde3b9fSTijl Coosemans #define	IDT_BP		3	/* #BP: Breakpoint */
202*bcde3b9fSTijl Coosemans #define	IDT_OF		4	/* #OF: Overflow */
203*bcde3b9fSTijl Coosemans #define	IDT_BR		5	/* #BR: Bound Range Exceeded */
204*bcde3b9fSTijl Coosemans #define	IDT_UD		6	/* #UD: Undefined/Invalid Opcode */
205*bcde3b9fSTijl Coosemans #define	IDT_NM		7	/* #NM: No Math Coprocessor */
206*bcde3b9fSTijl Coosemans #define	IDT_DF		8	/* #DF: Double Fault */
207*bcde3b9fSTijl Coosemans #define	IDT_FPUGP	9	/* Coprocessor Segment Overrun */
208*bcde3b9fSTijl Coosemans #define	IDT_TS		10	/* #TS: Invalid TSS */
209*bcde3b9fSTijl Coosemans #define	IDT_NP		11	/* #NP: Segment Not Present */
210*bcde3b9fSTijl Coosemans #define	IDT_SS		12	/* #SS: Stack Segment Fault */
211*bcde3b9fSTijl Coosemans #define	IDT_GP		13	/* #GP: General Protection Fault */
212*bcde3b9fSTijl Coosemans #define	IDT_PF		14	/* #PF: Page Fault */
213*bcde3b9fSTijl Coosemans #define	IDT_MF		16	/* #MF: FPU Floating-Point Error */
214*bcde3b9fSTijl Coosemans #define	IDT_AC		17	/* #AC: Alignment Check */
215*bcde3b9fSTijl Coosemans #define	IDT_MC		18	/* #MC: Machine Check */
216*bcde3b9fSTijl Coosemans #define	IDT_XF		19	/* #XF: SIMD Floating-Point Exception */
217*bcde3b9fSTijl Coosemans #define	IDT_IO_INTS	NRSVIDT	/* Base of IDT entries for I/O interrupts. */
218*bcde3b9fSTijl Coosemans #define	IDT_DTRACE_RET	0x20	/* DTrace pid provider Interrupt Vector */
219*bcde3b9fSTijl Coosemans #define	IDT_SYSCALL	0x80	/* System Call Interrupt Vector */
220*bcde3b9fSTijl Coosemans 
221*bcde3b9fSTijl Coosemans #if defined(__i386__) || defined(__ia64__)
222*bcde3b9fSTijl Coosemans /*
223*bcde3b9fSTijl Coosemans  * Entries in the Global Descriptor Table (GDT)
224*bcde3b9fSTijl Coosemans  * Note that each 4 entries share a single 32 byte L1 cache line.
225*bcde3b9fSTijl Coosemans  * Some of the fast syscall instructions require a specific order here.
226*bcde3b9fSTijl Coosemans  */
227*bcde3b9fSTijl Coosemans #define	GNULL_SEL	0	/* Null Descriptor */
228*bcde3b9fSTijl Coosemans #define	GPRIV_SEL	1	/* SMP Per-Processor Private Data */
229*bcde3b9fSTijl Coosemans #define	GUFS_SEL	2	/* User %fs Descriptor (order critical: 1) */
230*bcde3b9fSTijl Coosemans #define	GUGS_SEL	3	/* User %gs Descriptor (order critical: 2) */
231*bcde3b9fSTijl Coosemans #define	GCODE_SEL	4	/* Kernel Code Descriptor (order critical: 1) */
232*bcde3b9fSTijl Coosemans #define	GDATA_SEL	5	/* Kernel Data Descriptor (order critical: 2) */
233*bcde3b9fSTijl Coosemans #define	GUCODE_SEL	6	/* User Code Descriptor (order critical: 3) */
234*bcde3b9fSTijl Coosemans #define	GUDATA_SEL	7	/* User Data Descriptor (order critical: 4) */
235*bcde3b9fSTijl Coosemans #define	GBIOSLOWMEM_SEL	8	/* BIOS low memory access (must be entry 8) */
236*bcde3b9fSTijl Coosemans #define	GPROC0_SEL	9	/* Task state process slot zero and up */
237*bcde3b9fSTijl Coosemans #define	GLDT_SEL	10	/* Default User LDT */
238*bcde3b9fSTijl Coosemans #define	GUSERLDT_SEL	11	/* User LDT */
239*bcde3b9fSTijl Coosemans #define	GPANIC_SEL	12	/* Task state to consider panic from */
240*bcde3b9fSTijl Coosemans #define	GBIOSCODE32_SEL	13	/* BIOS interface (32bit Code) */
241*bcde3b9fSTijl Coosemans #define	GBIOSCODE16_SEL	14	/* BIOS interface (16bit Code) */
242*bcde3b9fSTijl Coosemans #define	GBIOSDATA_SEL	15	/* BIOS interface (Data) */
243*bcde3b9fSTijl Coosemans #define	GBIOSUTIL_SEL	16	/* BIOS interface (Utility) */
244*bcde3b9fSTijl Coosemans #define	GBIOSARGS_SEL	17	/* BIOS interface (Arguments) */
245*bcde3b9fSTijl Coosemans #define	GNDIS_SEL	18	/* For the NDIS layer */
246*bcde3b9fSTijl Coosemans #ifdef XEN
247*bcde3b9fSTijl Coosemans #define	NGDT		9
248*bcde3b9fSTijl Coosemans #else
249*bcde3b9fSTijl Coosemans #define	NGDT		19
250*bcde3b9fSTijl Coosemans #endif
251*bcde3b9fSTijl Coosemans 
252*bcde3b9fSTijl Coosemans /*
253*bcde3b9fSTijl Coosemans  * Entries in the Local Descriptor Table (LDT)
254*bcde3b9fSTijl Coosemans  */
255*bcde3b9fSTijl Coosemans #define	LSYS5CALLS_SEL	0	/* forced by intel BCS */
256*bcde3b9fSTijl Coosemans #define	LSYS5SIGR_SEL	1
257*bcde3b9fSTijl Coosemans #define	L43BSDCALLS_SEL	2	/* notyet */
258*bcde3b9fSTijl Coosemans #define	LUCODE_SEL	3
259*bcde3b9fSTijl Coosemans #define	LSOL26CALLS_SEL	4	/* Solaris >= 2.6 system call gate */
260*bcde3b9fSTijl Coosemans #define	LUDATA_SEL	5
261*bcde3b9fSTijl Coosemans /* separate stack, es,fs,gs sels ? */
262*bcde3b9fSTijl Coosemans /* #define	LPOSIXCALLS_SEL	5*/	/* notyet */
263*bcde3b9fSTijl Coosemans #define	LBSDICALLS_SEL	16	/* BSDI system call gate */
264*bcde3b9fSTijl Coosemans #define	NLDT		(LBSDICALLS_SEL + 1)
265*bcde3b9fSTijl Coosemans 
266*bcde3b9fSTijl Coosemans #else /* !__i386__ && !__ia64__ */
267*bcde3b9fSTijl Coosemans /*
268*bcde3b9fSTijl Coosemans  * Entries in the Global Descriptor Table (GDT)
269*bcde3b9fSTijl Coosemans  */
270*bcde3b9fSTijl Coosemans #define	GNULL_SEL	0	/* Null Descriptor */
271*bcde3b9fSTijl Coosemans #define	GNULL2_SEL	1	/* Null Descriptor */
272*bcde3b9fSTijl Coosemans #define	GUFS32_SEL	2	/* User 32 bit %fs Descriptor */
273*bcde3b9fSTijl Coosemans #define	GUGS32_SEL	3	/* User 32 bit %gs Descriptor */
274*bcde3b9fSTijl Coosemans #define	GCODE_SEL	4	/* Kernel Code Descriptor */
275*bcde3b9fSTijl Coosemans #define	GDATA_SEL	5	/* Kernel Data Descriptor */
276*bcde3b9fSTijl Coosemans #define	GUCODE32_SEL	6	/* User 32 bit code Descriptor */
277*bcde3b9fSTijl Coosemans #define	GUDATA_SEL	7	/* User 32/64 bit Data Descriptor */
278*bcde3b9fSTijl Coosemans #define	GUCODE_SEL	8	/* User 64 bit Code Descriptor */
279*bcde3b9fSTijl Coosemans #define	GPROC0_SEL	9	/* TSS for entering kernel etc */
280*bcde3b9fSTijl Coosemans /* slot 10 is second half of GPROC0_SEL */
281*bcde3b9fSTijl Coosemans #define	GUSERLDT_SEL	11	/* LDT */
282*bcde3b9fSTijl Coosemans /* slot 12 is second half of GUSERLDT_SEL */
283*bcde3b9fSTijl Coosemans #define	NGDT 		13
284*bcde3b9fSTijl Coosemans #endif /* __i386__ || __ia64__ */
285*bcde3b9fSTijl Coosemans 
286*bcde3b9fSTijl Coosemans #endif /* !_X86_SEGMENTS_H_ */
287