1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * Copyright (c) 2008 The DragonFly Project. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)tss.h 5.4 (Berkeley) 1/18/91 34 * $FreeBSD: src/sys/amd64/include/tss.h,v 1.15 2003/11/17 08:58:14 peter Exp $ 35 */ 36 37 #ifndef _CPU_TSS_H_ 38 #define _CPU_TSS_H_ 39 40 #include <sys/types.h> 41 42 /* 43 * x86_64 Context Data Type 44 * 45 * The alignment is pretty messed up here due to reuse of the original 32 bit 46 * fields. It might be worth trying to set the tss on a +4 byte offset to 47 * make the 64 bit fields aligned in practice. 48 */ 49 struct x86_64tss { 50 u_int32_t tss_rsvd0; 51 u_int64_t tss_rsp0 __packed; /* kernel stack pointer ring 0 */ 52 u_int64_t tss_rsp1 __packed; /* kernel stack pointer ring 1 */ 53 u_int64_t tss_rsp2 __packed; /* kernel stack pointer ring 2 */ 54 u_int32_t tss_rsvd1; 55 u_int32_t tss_rsvd2; 56 u_int64_t tss_ist1 __packed; /* Interrupt stack table 1 */ 57 u_int64_t tss_ist2 __packed; /* Interrupt stack table 2 */ 58 u_int64_t tss_ist3 __packed; /* Interrupt stack table 3 */ 59 u_int64_t tss_ist4 __packed; /* Interrupt stack table 4 */ 60 u_int64_t tss_ist5 __packed; /* Interrupt stack table 5 */ 61 u_int64_t tss_ist6 __packed; /* Interrupt stack table 6 */ 62 u_int64_t tss_ist7 __packed; /* Interrupt stack table 7 */ 63 u_int32_t tss_rsvd3; 64 u_int32_t tss_rsvd4; 65 u_int16_t tss_rsvd5; 66 u_int16_t tss_iobase; /* io bitmap offset */ 67 }; 68 69 #endif /* _CPU_TSS_H_ */ 70