tss.h revision 122849 
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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	from: @(#)tss.h	5.4 (Berkeley) 1/18/91
37 * $FreeBSD: head/sys/amd64/include/tss.h 122849 2003-11-17 08:58:16Z peter $
38 */
39
40#ifndef _MACHINE_TSS_H_
41#define _MACHINE_TSS_H_ 1
42
43/*
44 * amd64 Context Data Type
45 *
46 * The alignment is pretty messed up here due to reuse of the original 32 bit
47 * fields.  It might be worth trying to set the tss on a +4 byte offset to
48 * make the 64 bit fields aligned in practice.
49 */
50struct amd64tss {
51	u_int32_t	tss_rsvd0;
52	u_int64_t	tss_rsp0 __packed; 	/* kernel stack pointer ring 0 */
53	u_int64_t	tss_rsp1 __packed; 	/* kernel stack pointer ring 1 */
54	u_int64_t	tss_rsp2 __packed; 	/* kernel stack pointer ring 2 */
55	u_int32_t	tss_rsvd1;
56	u_int32_t	tss_rsvd2;
57	u_int32_t	tss_rsvd3;
58	u_int64_t	tss_ist1 __packed;	/* Interrupt stack table 1 */
59	u_int64_t	tss_ist2 __packed;	/* Interrupt stack table 2 */
60	u_int64_t	tss_ist3 __packed;	/* Interrupt stack table 3 */
61	u_int64_t	tss_ist4 __packed;	/* Interrupt stack table 4 */
62	u_int64_t	tss_ist5 __packed;	/* Interrupt stack table 5 */
63	u_int64_t	tss_ist6 __packed;	/* Interrupt stack table 6 */
64	u_int64_t	tss_ist7 __packed;	/* Interrupt stack table 7 */
65	u_int32_t	tss_rsvd4;
66	u_int32_t	tss_rsvd5;
67	u_int16_t	tss_rsvd6;
68	u_int16_t	tss_iobase;	/* io bitmap offset */
69};
70
71#ifdef _KERNEL
72extern struct amd64tss common_tss[];
73#endif
74
75#endif /* _MACHINE_TSS_H_ */
76