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      1 /*	$NetBSD: tss.h,v 1.8 2018/07/07 21:35:16 kamil Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Frank van der Linden for Wasabi Systems, Inc.
      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. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed for the NetBSD Project by
     20  *      Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #ifndef _AMD64_TSS_H_
     39 #define _AMD64_TSS_H_
     40 
     41 #ifdef __x86_64__
     42 
     43 /*
     44  * TSS structure. Since TSS hw switching is not supported in long
     45  * mode, this is mainly there for the I/O permission map in
     46  * normal processes.
     47  */
     48 
     49 struct x86_64_tss {
     50 	uint32_t	tss_reserved1;
     51 	uint64_t	tss_rsp0;
     52 	uint64_t	tss_rsp1;
     53 	uint64_t	tss_rsp2;
     54 	uint32_t	tss_reserved2;
     55 	uint32_t	tss_reserved3;
     56 	uint64_t	tss_ist[7];
     57 	uint32_t	tss_reserved4;
     58 	uint32_t	tss_reserved5;
     59 	uint32_t	tss_iobase;
     60 } __packed;
     61 
     62 /*
     63  * I/O bitmap offset beyond TSS's segment limit means no bitmaps.
     64  * (i.e. any I/O attempt generates an exception.)
     65  */
     66 #define	IOMAP_INVALOFF	0xffffu
     67 
     68 /*
     69  * If we have an I/O bitmap, there is only one valid offset.
     70  */
     71 #define	IOMAP_VALIDOFF	sizeof(struct x86_64_tss)
     72 
     73 #else	/*	__x86_64__	*/
     74 
     75 #include <i386/tss.h>
     76 
     77 #endif	/*	__x86_64__	*/
     78 
     79 #endif /* _AMD64_TSS_H_ */
     80