usr/src/boot/sys/amd64/include/tss.h

   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_ */