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segments.h revision 1.3
      1  1.3  fvdl /*	$NetBSD: segments.h,v 1.3 2003/10/13 18:40:16 fvdl Exp $	*/
      2  1.2   agc 
      3  1.2   agc /*-
      4  1.2   agc  * Copyright (c) 1990 The Regents of the University of California.
      5  1.2   agc  * All rights reserved.
      6  1.2   agc  *
      7  1.2   agc  * This code is derived from software contributed to Berkeley by
      8  1.2   agc  * William Jolitz.
      9  1.2   agc  *
     10  1.2   agc  * Redistribution and use in source and binary forms, with or without
     11  1.2   agc  * modification, are permitted provided that the following conditions
     12  1.2   agc  * are met:
     13  1.2   agc  * 1. Redistributions of source code must retain the above copyright
     14  1.2   agc  *    notice, this list of conditions and the following disclaimer.
     15  1.2   agc  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2   agc  *    notice, this list of conditions and the following disclaimer in the
     17  1.2   agc  *    documentation and/or other materials provided with the distribution.
     18  1.2   agc  * 3. Neither the name of the University nor the names of its contributors
     19  1.2   agc  *    may be used to endorse or promote products derived from this software
     20  1.2   agc  *    without specific prior written permission.
     21  1.2   agc  *
     22  1.2   agc  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  1.2   agc  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  1.2   agc  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  1.2   agc  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  1.2   agc  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  1.2   agc  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  1.2   agc  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  1.2   agc  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  1.2   agc  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  1.2   agc  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  1.2   agc  * SUCH DAMAGE.
     33  1.2   agc  *
     34  1.2   agc  *	@(#)segments.h	7.1 (Berkeley) 5/9/91
     35  1.2   agc  */
     36  1.1  fvdl 
     37  1.1  fvdl /*-
     38  1.1  fvdl  * Copyright (c) 1995, 1997
     39  1.1  fvdl  *	Charles M. Hannum.  All rights reserved.
     40  1.1  fvdl  * Copyright (c) 1989, 1990 William F. Jolitz
     41  1.1  fvdl  *
     42  1.1  fvdl  * This code is derived from software contributed to Berkeley by
     43  1.1  fvdl  * William Jolitz.
     44  1.1  fvdl  *
     45  1.1  fvdl  * Redistribution and use in source and binary forms, with or without
     46  1.1  fvdl  * modification, are permitted provided that the following conditions
     47  1.1  fvdl  * are met:
     48  1.1  fvdl  * 1. Redistributions of source code must retain the above copyright
     49  1.1  fvdl  *    notice, this list of conditions and the following disclaimer.
     50  1.1  fvdl  * 2. Redistributions in binary form must reproduce the above copyright
     51  1.1  fvdl  *    notice, this list of conditions and the following disclaimer in the
     52  1.1  fvdl  *    documentation and/or other materials provided with the distribution.
     53  1.1  fvdl  * 3. All advertising materials mentioning features or use of this software
     54  1.1  fvdl  *    must display the following acknowledgement:
     55  1.1  fvdl  *	This product includes software developed by the University of
     56  1.1  fvdl  *	California, Berkeley and its contributors.
     57  1.1  fvdl  * 4. Neither the name of the University nor the names of its contributors
     58  1.1  fvdl  *    may be used to endorse or promote products derived from this software
     59  1.1  fvdl  *    without specific prior written permission.
     60  1.1  fvdl  *
     61  1.1  fvdl  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     62  1.1  fvdl  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     63  1.1  fvdl  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     64  1.1  fvdl  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     65  1.1  fvdl  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     66  1.1  fvdl  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     67  1.1  fvdl  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     68  1.1  fvdl  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     69  1.1  fvdl  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     70  1.1  fvdl  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     71  1.1  fvdl  * SUCH DAMAGE.
     72  1.1  fvdl  *
     73  1.1  fvdl  *	@(#)segments.h	7.1 (Berkeley) 5/9/91
     74  1.1  fvdl  */
     75  1.1  fvdl 
     76  1.1  fvdl /*
     77  1.1  fvdl  * Adapted for NetBSD/amd64 by fvdl (at) wasabisystems.com.
     78  1.1  fvdl  */
     79  1.1  fvdl 
     80  1.1  fvdl /*
     81  1.1  fvdl  * 386 Segmentation Data Structures and definitions
     82  1.1  fvdl  *	William F. Jolitz (william (at) ernie.berkeley.edu) 6/20/1989
     83  1.1  fvdl  */
     84  1.1  fvdl 
     85  1.1  fvdl #ifndef _AMD64_SEGMENTS_H_
     86  1.1  fvdl #define _AMD64_SEGMENTS_H_
     87  1.1  fvdl 
     88  1.1  fvdl /*
     89  1.1  fvdl  * Selectors
     90  1.1  fvdl  */
     91  1.1  fvdl 
     92  1.1  fvdl #define	ISPL(s)		((s) & SEL_RPL)	/* what is the priority level of a selector */
     93  1.1  fvdl #define	SEL_KPL		0		/* kernel privilege level */
     94  1.1  fvdl #define	SEL_UPL		3		/* user privilege level */
     95  1.1  fvdl #define	SEL_RPL		3		/* requester's privilege level mask */
     96  1.1  fvdl #define	ISLDT(s)	((s) & SEL_LDT)	/* is it local or global */
     97  1.1  fvdl #define	SEL_LDT		4		/* local descriptor table */
     98  1.1  fvdl 
     99  1.1  fvdl /* Dynamically allocated TSSs and LDTs start (byte offset) */
    100  1.1  fvdl #define SYSSEL_START	(NGDT_MEM << 3)
    101  1.1  fvdl #define DYNSEL_START	(SYSSEL_START + (NGDT_SYS << 4))
    102  1.1  fvdl 
    103  1.1  fvdl /*
    104  1.1  fvdl  * These define the index not from the start of the GDT, but from
    105  1.1  fvdl  * the part of the GDT that they're allocated from.
    106  1.1  fvdl  * First NGDT_MEM entries are 8-byte descriptors for CS and DS.
    107  1.1  fvdl  * Next NGDT_SYS entries are 16-byte descriptors defining LDTs.
    108  1.1  fvdl  *
    109  1.1  fvdl  * The rest is 16-byte descriptors for TSS and LDT.
    110  1.1  fvdl  */
    111  1.1  fvdl 
    112  1.1  fvdl #define	IDXSEL(s)	(((s) >> 3) & 0x1fff)
    113  1.1  fvdl #define IDXDYNSEL(s)	((((s) & ~SEL_RPL) - DYNSEL_START) >> 4)
    114  1.1  fvdl 
    115  1.1  fvdl #define	GSEL(s,r)	(((s) << 3) | r)
    116  1.1  fvdl #define	GSYSSEL(s,r)	((((s) << 4) + SYSSEL_START) | r)
    117  1.1  fvdl #define GDYNSEL(s,r)	((((s) << 4) + DYNSEL_START) | r | SEL_KPL)
    118  1.1  fvdl 
    119  1.1  fvdl #define LSEL(s,r)	((s) | r | SEL_LDT)
    120  1.1  fvdl 
    121  1.1  fvdl #define	USERMODE(c, f)		(ISPL(c) == SEL_UPL)
    122  1.1  fvdl #define	KERNELMODE(c, f)	(ISPL(c) == SEL_KPL)
    123  1.1  fvdl 
    124  1.1  fvdl #ifndef _LOCORE
    125  1.1  fvdl 
    126  1.1  fvdl /*
    127  1.1  fvdl  * Memory and System segment descriptors
    128  1.1  fvdl  */
    129  1.1  fvdl 
    130  1.1  fvdl /*
    131  1.1  fvdl  * Below is used for TSS and LDT.
    132  1.1  fvdl  */
    133  1.1  fvdl struct sys_segment_descriptor {
    134  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_lolimit:16;/* segment extent (lsb) */
    135  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_lobase:24;/* segment base address (lsb) */
    136  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_type:5;	/* segment type */
    137  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_dpl:2;	/* segment descriptor priority level */
    138  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_p:1;	/* segment descriptor present */
    139  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_hilimit:4;/* segment extent (msb) */
    140  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_xx1:3;	/* avl, long and def32 (not used) */
    141  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_gran:1;	/* limit granularity (byte/page) */
    142  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_hibase:40;/* segment base address (msb) */
    143  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_xx2:8;	/* reserved */
    144  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_zero:5;	/* must be zero */
    145  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t sd_xx3:19;	/* reserved */
    146  1.1  fvdl } __attribute__((packed));
    147  1.1  fvdl 
    148  1.1  fvdl /*
    149  1.1  fvdl  * Below is used for cs, ds, etc.
    150  1.1  fvdl  */
    151  1.1  fvdl struct mem_segment_descriptor {
    152  1.1  fvdl 	unsigned sd_lolimit:16;         /* segment extent (lsb) */
    153  1.1  fvdl 	unsigned sd_lobase:24;          /* segment base address (lsb) */
    154  1.1  fvdl 	unsigned sd_type:5;             /* segment type */
    155  1.1  fvdl 	unsigned sd_dpl:2;              /* segment descriptor priority level */
    156  1.1  fvdl 	unsigned sd_p:1;                /* segment descriptor present */
    157  1.1  fvdl 	unsigned sd_hilimit:4;          /* segment extent (msb) */
    158  1.1  fvdl 	unsigned sd_avl:1;		/* available */
    159  1.1  fvdl 	unsigned sd_long:1;		/* long mode */
    160  1.1  fvdl 	unsigned sd_def32:1;            /* default 32 vs 16 bit size */
    161  1.1  fvdl 	unsigned sd_gran:1;             /* limit granularity (byte/page) */
    162  1.1  fvdl 	unsigned sd_hibase:8;           /* segment base address (msb) */
    163  1.1  fvdl } __attribute__((packed));
    164  1.1  fvdl 
    165  1.1  fvdl /*
    166  1.1  fvdl  * Gate descriptors (e.g. indirect descriptors)
    167  1.1  fvdl  */
    168  1.1  fvdl struct gate_descriptor {
    169  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_looffset:16;/* gate offset (lsb) */
    170  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_selector:16;/* gate segment selector */
    171  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_ist:3;	/* IST select */
    172  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_xx1:5;	/* reserved */
    173  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_type:5;	/* segment type */
    174  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_dpl:2;	/* segment descriptor priority level */
    175  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_p:1;	/* segment descriptor present */
    176  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_hioffset:48;/* gate offset (msb) */
    177  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_xx2:8;	/* reserved */
    178  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_zero:5;	/* must be zero */
    179  1.1  fvdl /*BITFIELDTYPE*/ u_int64_t gd_xx3:19;	/* reserved */
    180  1.1  fvdl } __attribute__((packed));
    181  1.1  fvdl 
    182  1.1  fvdl /*
    183  1.1  fvdl  * region descriptors, used to load gdt/idt tables before segments yet exist.
    184  1.1  fvdl  */
    185  1.1  fvdl struct region_descriptor {
    186  1.1  fvdl 	u_int16_t rd_limit;		/* segment extent */
    187  1.1  fvdl 	u_int64_t rd_base;		/* base address  */
    188  1.1  fvdl } __attribute__((packed));
    189  1.1  fvdl 
    190  1.1  fvdl #ifdef _KERNEL
    191  1.1  fvdl #if 0
    192  1.1  fvdl extern struct sys_segment_descriptor *ldt;
    193  1.1  fvdl #endif
    194  1.1  fvdl extern struct gate_descriptor *idt;
    195  1.1  fvdl extern char *gdtstore;
    196  1.1  fvdl extern char *ldtstore;
    197  1.1  fvdl 
    198  1.1  fvdl void setgate __P((struct gate_descriptor *, void *, int, int, int, int));
    199  1.1  fvdl void unsetgate __P((struct gate_descriptor *));
    200  1.1  fvdl void setregion __P((struct region_descriptor *, void *, u_int16_t));
    201  1.1  fvdl void set_sys_segment __P((struct sys_segment_descriptor *, void *, size_t,
    202  1.1  fvdl 			  int, int, int));
    203  1.1  fvdl void set_mem_segment __P((struct mem_segment_descriptor *, void *, size_t,
    204  1.1  fvdl 			  int, int, int, int, int));
    205  1.1  fvdl int idt_vec_alloc __P((int, int));
    206  1.1  fvdl void idt_vec_set __P((int, void (*)(void)));
    207  1.1  fvdl void idt_vec_free __P((int));
    208  1.1  fvdl void cpu_init_idt __P((void));
    209  1.1  fvdl 
    210  1.1  fvdl #endif /* _KERNEL */
    211  1.1  fvdl 
    212  1.1  fvdl #endif /* !_LOCORE */
    213  1.1  fvdl 
    214  1.1  fvdl /* system segments and gate types */
    215  1.1  fvdl #define	SDT_SYSNULL	 0	/* system null */
    216  1.1  fvdl #define	SDT_SYS286TSS	 1	/* system 286 TSS available */
    217  1.1  fvdl #define	SDT_SYSLDT	 2	/* system local descriptor table */
    218  1.1  fvdl #define	SDT_SYS286BSY	 3	/* system 286 TSS busy */
    219  1.1  fvdl #define	SDT_SYS286CGT	 4	/* system 286 call gate */
    220  1.1  fvdl #define	SDT_SYSTASKGT	 5	/* system task gate */
    221  1.1  fvdl #define	SDT_SYS286IGT	 6	/* system 286 interrupt gate */
    222  1.1  fvdl #define	SDT_SYS286TGT	 7	/* system 286 trap gate */
    223  1.1  fvdl #define	SDT_SYSNULL2	 8	/* system null again */
    224  1.1  fvdl #define	SDT_SYS386TSS	 9	/* system 386 TSS available */
    225  1.1  fvdl #define	SDT_SYSNULL3	10	/* system null again */
    226  1.1  fvdl #define	SDT_SYS386BSY	11	/* system 386 TSS busy */
    227  1.1  fvdl #define	SDT_SYS386CGT	12	/* system 386 call gate */
    228  1.1  fvdl #define	SDT_SYSNULL4	13	/* system null again */
    229  1.1  fvdl #define	SDT_SYS386IGT	14	/* system 386 interrupt gate */
    230  1.1  fvdl #define	SDT_SYS386TGT	15	/* system 386 trap gate */
    231  1.1  fvdl 
    232  1.1  fvdl /* memory segment types */
    233  1.1  fvdl #define	SDT_MEMRO	16	/* memory read only */
    234  1.1  fvdl #define	SDT_MEMROA	17	/* memory read only accessed */
    235  1.1  fvdl #define	SDT_MEMRW	18	/* memory read write */
    236  1.1  fvdl #define	SDT_MEMRWA	19	/* memory read write accessed */
    237  1.1  fvdl #define	SDT_MEMROD	20	/* memory read only expand dwn limit */
    238  1.1  fvdl #define	SDT_MEMRODA	21	/* memory read only expand dwn limit accessed */
    239  1.1  fvdl #define	SDT_MEMRWD	22	/* memory read write expand dwn limit */
    240  1.1  fvdl #define	SDT_MEMRWDA	23	/* memory read write expand dwn limit acessed */
    241  1.1  fvdl #define	SDT_MEME	24	/* memory execute only */
    242  1.1  fvdl #define	SDT_MEMEA	25	/* memory execute only accessed */
    243  1.1  fvdl #define	SDT_MEMER	26	/* memory execute read */
    244  1.1  fvdl #define	SDT_MEMERA	27	/* memory execute read accessed */
    245  1.1  fvdl #define	SDT_MEMEC	28	/* memory execute only conforming */
    246  1.1  fvdl #define	SDT_MEMEAC	29	/* memory execute only accessed conforming */
    247  1.1  fvdl #define	SDT_MEMERC	30	/* memory execute read conforming */
    248  1.1  fvdl #define	SDT_MEMERAC	31	/* memory execute read accessed conforming */
    249  1.1  fvdl 
    250  1.1  fvdl /* is memory segment descriptor pointer ? */
    251  1.1  fvdl #define ISMEMSDP(s)	((s->d_type) >= SDT_MEMRO && \
    252  1.1  fvdl 			 (s->d_type) <= SDT_MEMERAC)
    253  1.1  fvdl 
    254  1.1  fvdl /* is 286 gate descriptor pointer ? */
    255  1.1  fvdl #define IS286GDP(s)	((s->d_type) >= SDT_SYS286CGT && \
    256  1.1  fvdl 			 (s->d_type) < SDT_SYS286TGT)
    257  1.1  fvdl 
    258  1.1  fvdl /* is 386 gate descriptor pointer ? */
    259  1.1  fvdl #define IS386GDP(s)	((s->d_type) >= SDT_SYS386CGT && \
    260  1.1  fvdl 			 (s->d_type) < SDT_SYS386TGT)
    261  1.1  fvdl 
    262  1.1  fvdl /* is gate descriptor pointer ? */
    263  1.1  fvdl #define ISGDP(s)	(IS286GDP(s) || IS386GDP(s))
    264  1.1  fvdl 
    265  1.1  fvdl /* is segment descriptor pointer ? */
    266  1.1  fvdl #define ISSDP(s)	(ISMEMSDP(s) || !ISGDP(s))
    267  1.1  fvdl 
    268  1.1  fvdl /* is system segment descriptor pointer ? */
    269  1.1  fvdl #define ISSYSSDP(s)	(!ISMEMSDP(s) && !ISGDP(s))
    270  1.1  fvdl 
    271  1.1  fvdl /*
    272  1.1  fvdl  * Segment Protection Exception code bits
    273  1.1  fvdl  */
    274  1.1  fvdl #define	SEGEX_EXT	0x01	/* recursive or externally induced */
    275  1.1  fvdl #define	SEGEX_IDT	0x02	/* interrupt descriptor table */
    276  1.1  fvdl #define	SEGEX_TI	0x04	/* local descriptor table */
    277  1.1  fvdl 
    278  1.1  fvdl /*
    279  1.1  fvdl  * Entries in the Interrupt Descriptor Table (IDT)
    280  1.1  fvdl  */
    281  1.1  fvdl #define	NIDT	256
    282  1.1  fvdl #define	NRSVIDT	32		/* reserved entries for cpu exceptions */
    283  1.1  fvdl 
    284  1.1  fvdl /*
    285  1.1  fvdl  * Entries in the Global Descriptor Table (GDT)
    286  1.1  fvdl  * The code and data descriptors must come first. There
    287  1.1  fvdl  * are NGDT_MEM of them.
    288  1.1  fvdl  *
    289  1.1  fvdl  * Then come the predefined LDT (and possibly TSS) descriptors.
    290  1.1  fvdl  * There are NGDT_SYS of them.
    291  1.1  fvdl  */
    292  1.1  fvdl #define	GNULL_SEL	0	/* Null descriptor */
    293  1.1  fvdl #define	GCODE_SEL	1	/* Kernel code descriptor */
    294  1.1  fvdl #define	GDATA_SEL	2	/* Kernel data descriptor */
    295  1.1  fvdl #define	GUCODE_SEL	3	/* User code descriptor */
    296  1.1  fvdl #define	GUDATA_SEL	4	/* User data descriptor */
    297  1.1  fvdl #define	GAPM32CODE_SEL	5
    298  1.1  fvdl #define	GAPM16CODE_SEL	6
    299  1.1  fvdl #define	GAPMDATA_SEL	7
    300  1.1  fvdl #define	GBIOSCODE_SEL	8
    301  1.1  fvdl #define	GBIOSDATA_SEL	9
    302  1.1  fvdl #define GPNPBIOSCODE_SEL 10
    303  1.1  fvdl #define GPNPBIOSDATA_SEL 11
    304  1.1  fvdl #define GPNPBIOSSCRATCH_SEL 12
    305  1.1  fvdl #define GPNPBIOSTRAMP_SEL 13
    306  1.1  fvdl #define GUCODE32_SEL	14
    307  1.1  fvdl #define GUDATA32_SEL	15
    308  1.1  fvdl #define NGDT_MEM 16
    309  1.1  fvdl 
    310  1.1  fvdl #define	GLDT_SEL	0	/* Default LDT descriptor */
    311  1.1  fvdl #define NGDT_SYS	1
    312  1.1  fvdl 
    313  1.1  fvdl #define GDT_SYS_OFFSET	(NGDT_MEM << 3)
    314  1.1  fvdl 
    315  1.1  fvdl #define GDT_ADDR_MEM(s,i)	\
    316  1.1  fvdl     ((struct mem_segment_descriptor *)((s) + ((i) << 3)))
    317  1.1  fvdl #define GDT_ADDR_SYS(s,i)	\
    318  1.1  fvdl    ((struct sys_segment_descriptor *)((s) + (((i) << 4) + SYSSEL_START)))
    319  1.1  fvdl 
    320  1.1  fvdl /*
    321  1.1  fvdl  * Byte offsets in the Local Descriptor Table (LDT)
    322  1.1  fvdl  * Strange order because of syscall/sysret insns
    323  1.1  fvdl  */
    324  1.1  fvdl #define	LSYS5CALLS_SEL	0	/* iBCS system call gate */
    325  1.1  fvdl #define LUCODE32_SEL	8	/* 32 bit user code descriptor */
    326  1.1  fvdl #define	LUDATA_SEL	16	/* User data descriptor */
    327  1.1  fvdl #define	LUCODE_SEL	24	/* User code descriptor */
    328  1.1  fvdl #define	LSOL26CALLS_SEL	32	/* Solaris 2.6 system call gate */
    329  1.1  fvdl #define LUDATA32_SEL	56	/* 32 bit user data descriptor (needed?)*/
    330  1.1  fvdl #define	LBSDICALLS_SEL	128	/* BSDI system call gate */
    331  1.1  fvdl 
    332  1.1  fvdl #define LDT_SIZE	144
    333  1.1  fvdl 
    334  1.1  fvdl #define LSYSRETBASE_SEL	LUCODE32_SEL
    335  1.3  fvdl 
    336  1.3  fvdl /*
    337  1.3  fvdl  * Checks for valid user selectors. If USER_LDT ever gets implemented
    338  1.3  fvdl  * for amd64, these must check the ldt length and SEL_UPL if a user
    339  1.3  fvdl  * ldt is active.
    340  1.3  fvdl  */
    341  1.3  fvdl #define VALID_USER_DSEL32(s) \
    342  1.3  fvdl     ((s) == GSEL(GUDATA32_SEL, SEL_UPL) || (s) == LSEL(LUDATA32_SEL, SEL_UPL))
    343  1.3  fvdl #define VALID_USER_CSEL32(s) \
    344  1.3  fvdl     ((s) == GSEL(GUCODE32_SEL, SEL_UPL) || (s) == LSEL(LUCODE32_SEL, SEL_UPL))
    345  1.3  fvdl 
    346  1.3  fvdl #define VALID_USER_CSEL(s) \
    347  1.3  fvdl     ((s) == GSEL(GUCODE_SEL, SEL_UPL) || (s) == LSEL(LUCODE_SEL, SEL_UPL))
    348  1.3  fvdl #define VALID_USER_DSEL(s) \
    349  1.3  fvdl     ((s) == GSEL(GUDATA_SEL, SEL_UPL) || (s) == LSEL(LUDATA_SEL, SEL_UPL))
    350  1.1  fvdl 
    351  1.1  fvdl #endif /* _AMD64_SEGMENTS_H_ */
    352