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 * 4. 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 * $FreeBSD$
34 */
35
36#ifndef _MACHINE_TSS_H_
37#define _MACHINE_TSS_H_ 1
38
39/*
40 * amd64 Context Data Type
41 *
42 * The alignment is pretty messed up here due to reuse of the original 32 bit
43 * fields.  It might be worth trying to set the tss on a +4 byte offset to
44 * make the 64 bit fields aligned in practice.
45 */
46struct amd64tss {
47	u_int32_t	tss_rsvd0;
48	u_int64_t	tss_rsp0 __packed; 	/* kernel stack pointer ring 0 */
49	u_int64_t	tss_rsp1 __packed; 	/* kernel stack pointer ring 1 */
50	u_int64_t	tss_rsp2 __packed; 	/* kernel stack pointer ring 2 */
51	u_int32_t	tss_rsvd1;
52	u_int32_t	tss_rsvd2;
53	u_int64_t	tss_ist1 __packed;	/* Interrupt stack table 1 */
54	u_int64_t	tss_ist2 __packed;	/* Interrupt stack table 2 */
55	u_int64_t	tss_ist3 __packed;	/* Interrupt stack table 3 */
56	u_int64_t	tss_ist4 __packed;	/* Interrupt stack table 4 */
57	u_int64_t	tss_ist5 __packed;	/* Interrupt stack table 5 */
58	u_int64_t	tss_ist6 __packed;	/* Interrupt stack table 6 */
59	u_int64_t	tss_ist7 __packed;	/* Interrupt stack table 7 */
60	u_int32_t	tss_rsvd3;
61	u_int32_t	tss_rsvd4;
62	u_int16_t	tss_rsvd5;
63	u_int16_t	tss_iobase;	/* io bitmap offset */
64};
65
66#ifdef _KERNEL
67extern struct amd64tss common_tss[];
68#endif
69
70#endif /* _MACHINE_TSS_H_ */
71