xref: /illumos-gate/usr/src/boot/sys/amd64/include/tss.h (revision 9c8f3233f955a5f06cea88f930e5d8e131795867)
1 /*-
2  * Copyright (c) 1990 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * William Jolitz.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  *	from: @(#)tss.h	5.4 (Berkeley) 1/18/91
33  */
34 
35 #ifndef _MACHINE_TSS_H_
36 #define _MACHINE_TSS_H_ 1
37 
38 /*
39  * amd64 Context Data Type
40  *
41  * The alignment is pretty messed up here due to reuse of the original 32 bit
42  * fields.  It might be worth trying to set the tss on a +4 byte offset to
43  * make the 64 bit fields aligned in practice.
44  */
45 struct amd64tss {
46 	u_int32_t	tss_rsvd0;
47 	u_int64_t	tss_rsp0 __packed;	/* kernel stack pointer ring 0 */
48 	u_int64_t	tss_rsp1 __packed;	/* kernel stack pointer ring 1 */
49 	u_int64_t	tss_rsp2 __packed;	/* kernel stack pointer ring 2 */
50 	u_int32_t	tss_rsvd1;
51 	u_int32_t	tss_rsvd2;
52 	u_int64_t	tss_ist1 __packed;	/* Interrupt stack table 1 */
53 	u_int64_t	tss_ist2 __packed;	/* Interrupt stack table 2 */
54 	u_int64_t	tss_ist3 __packed;	/* Interrupt stack table 3 */
55 	u_int64_t	tss_ist4 __packed;	/* Interrupt stack table 4 */
56 	u_int64_t	tss_ist5 __packed;	/* Interrupt stack table 5 */
57 	u_int64_t	tss_ist6 __packed;	/* Interrupt stack table 6 */
58 	u_int64_t	tss_ist7 __packed;	/* Interrupt stack table 7 */
59 	u_int32_t	tss_rsvd3;
60 	u_int32_t	tss_rsvd4;
61 	u_int16_t	tss_rsvd5;
62 	u_int16_t	tss_iobase;	/* io bitmap offset */
63 };
64 
65 #ifdef _KERNEL
66 extern struct amd64tss common_tss[];
67 #endif
68 
69 #endif /* _MACHINE_TSS_H_ */
70