tss.h revision 46129
14Srgrimes/*- 24Srgrimes * Copyright (c) 1990 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * This code is derived from software contributed to Berkeley by 64Srgrimes * William Jolitz. 74Srgrimes * 84Srgrimes * Redistribution and use in source and binary forms, with or without 94Srgrimes * modification, are permitted provided that the following conditions 104Srgrimes * are met: 114Srgrimes * 1. Redistributions of source code must retain the above copyright 124Srgrimes * notice, this list of conditions and the following disclaimer. 134Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 144Srgrimes * notice, this list of conditions and the following disclaimer in the 154Srgrimes * documentation and/or other materials provided with the distribution. 164Srgrimes * 3. All advertising materials mentioning features or use of this software 174Srgrimes * must display the following acknowledgement: 184Srgrimes * This product includes software developed by the University of 194Srgrimes * California, Berkeley and its contributors. 204Srgrimes * 4. Neither the name of the University nor the names of its contributors 214Srgrimes * may be used to endorse or promote products derived from this software 224Srgrimes * without specific prior written permission. 234Srgrimes * 244Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 254Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 264Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 274Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 284Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 294Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 304Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 314Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 324Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 334Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 344Srgrimes * SUCH DAMAGE. 354Srgrimes * 36621Srgrimes * from: @(#)tss.h 5.4 (Berkeley) 1/18/91 3746129Sluoqi * $Id: tss.h,v 1.8 1997/02/22 09:35:20 peter Exp $ 384Srgrimes */ 394Srgrimes 40719Swollman#ifndef _MACHINE_TSS_H_ 41719Swollman#define _MACHINE_TSS_H_ 1 42719Swollman 4346129Sluoqi#include <machine/globals.h> 4446129Sluoqi 454Srgrimes/* 464Srgrimes * Intel 386 Context Data Type 474Srgrimes */ 484Srgrimes 494Srgrimesstruct i386tss { 504Srgrimes int tss_link; /* actually 16 bits: top 16 bits must be zero */ 5113765Smpp int tss_esp0; /* kernel stack pointer privilege level 0 */ 524Srgrimes#define tss_ksp tss_esp0 534Srgrimes int tss_ss0; /* actually 16 bits: top 16 bits must be zero */ 5413765Smpp int tss_esp1; /* kernel stack pointer privilege level 1 */ 554Srgrimes int tss_ss1; /* actually 16 bits: top 16 bits must be zero */ 5613765Smpp int tss_esp2; /* kernel stack pointer privilege level 2 */ 574Srgrimes int tss_ss2; /* actually 16 bits: top 16 bits must be zero */ 584Srgrimes int tss_cr3; /* page table directory */ 594Srgrimes#define tss_ptd tss_cr3 604Srgrimes int tss_eip; /* program counter */ 614Srgrimes#define tss_pc tss_eip 624Srgrimes int tss_eflags; /* program status longword */ 634Srgrimes#define tss_psl tss_eflags 648876Srgrimes int tss_eax; 658876Srgrimes int tss_ecx; 668876Srgrimes int tss_edx; 678876Srgrimes int tss_ebx; 684Srgrimes int tss_esp; /* user stack pointer */ 694Srgrimes#define tss_usp tss_esp 704Srgrimes int tss_ebp; /* user frame pointer */ 714Srgrimes#define tss_fp tss_ebp 728876Srgrimes int tss_esi; 738876Srgrimes int tss_edi; 744Srgrimes int tss_es; /* actually 16 bits: top 16 bits must be zero */ 754Srgrimes int tss_cs; /* actually 16 bits: top 16 bits must be zero */ 764Srgrimes int tss_ss; /* actually 16 bits: top 16 bits must be zero */ 774Srgrimes int tss_ds; /* actually 16 bits: top 16 bits must be zero */ 784Srgrimes int tss_fs; /* actually 16 bits: top 16 bits must be zero */ 794Srgrimes int tss_gs; /* actually 16 bits: top 16 bits must be zero */ 804Srgrimes int tss_ldt; /* actually 16 bits: top 16 bits must be zero */ 814Srgrimes int tss_ioopt; /* options & io offset bitmap: currently zero */ 824Srgrimes /* XXX unimplemented .. i/o permission bitmap */ 834Srgrimes}; 8446129Sluoqi 8546129Sluoqi#ifdef KERNEL 8646129Sluoqi#ifndef common_tss 8746129Sluoqiextern struct i386tss common_tss; 8846129Sluoqi#endif 8946129Sluoqi#endif 9046129Sluoqi 91719Swollman#endif /* _MACHINE_TSS_H_ */ 92