tss.h revision 1.11.2.1
1 1.11.2.1 pgoyette /* $NetBSD: tss.h,v 1.11.2.1 2018/07/28 04:37:34 pgoyette Exp $ */ 2 1.4 cgd 3 1.1 cgd /*- 4 1.1 cgd * Copyright (c) 1990 The Regents of the University of California. 5 1.1 cgd * All rights reserved. 6 1.1 cgd * 7 1.1 cgd * This code is derived from software contributed to Berkeley by 8 1.1 cgd * William Jolitz. 9 1.1 cgd * 10 1.1 cgd * Redistribution and use in source and binary forms, with or without 11 1.1 cgd * modification, are permitted provided that the following conditions 12 1.1 cgd * are met: 13 1.1 cgd * 1. Redistributions of source code must retain the above copyright 14 1.1 cgd * notice, this list of conditions and the following disclaimer. 15 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 cgd * notice, this list of conditions and the following disclaimer in the 17 1.1 cgd * documentation and/or other materials provided with the distribution. 18 1.8 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 cgd * may be used to endorse or promote products derived from this software 20 1.1 cgd * without specific prior written permission. 21 1.1 cgd * 22 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 cgd * SUCH DAMAGE. 33 1.1 cgd * 34 1.4 cgd * @(#)tss.h 5.4 (Berkeley) 1/18/91 35 1.1 cgd */ 36 1.1 cgd 37 1.7 fvdl #ifndef _I386_TSS_H_ 38 1.7 fvdl #define _I386_TSS_H_ 39 1.7 fvdl 40 1.1 cgd /* 41 1.1 cgd * Intel 386 Context Data Type 42 1.1 cgd */ 43 1.1 cgd 44 1.1 cgd struct i386tss { 45 1.5 mycroft int __tss_link; 46 1.5 mycroft int tss_esp0; /* kernel stack pointer at privilege level 0 */ 47 1.5 mycroft int tss_ss0; /* kernel stack segment at privilege level 0 */ 48 1.5 mycroft int __tss_esp1; 49 1.5 mycroft int __tss_ss1; 50 1.5 mycroft int __tss_esp2; 51 1.5 mycroft int __tss_ss2; 52 1.5 mycroft int tss_cr3; /* page directory paddr */ 53 1.5 mycroft int __tss_eip; 54 1.5 mycroft int __tss_eflags; 55 1.5 mycroft int __tss_eax; 56 1.5 mycroft int __tss_ecx; 57 1.5 mycroft int __tss_edx; 58 1.5 mycroft int __tss_ebx; 59 1.5 mycroft int tss_esp; /* saved stack pointer */ 60 1.5 mycroft int tss_ebp; /* saved frame pointer */ 61 1.5 mycroft int __tss_esi; 62 1.5 mycroft int __tss_edi; 63 1.5 mycroft int __tss_es; 64 1.5 mycroft int __tss_cs; 65 1.5 mycroft int __tss_ss; 66 1.5 mycroft int __tss_ds; 67 1.5 mycroft int tss_fs; /* saved segment register */ 68 1.5 mycroft int tss_gs; /* saved segment register */ 69 1.6 mycroft int tss_ldt; /* LDT selector */ 70 1.9 yamt int tss_iobase; /* options and I/O permission map offset */ 71 1.1 cgd }; 72 1.7 fvdl 73 1.10 yamt /* 74 1.10 yamt * I/O bitmap offset beyond TSS's segment limit means no bitmaps. 75 1.10 yamt * (i.e. any I/O attempt generates an exception.) 76 1.10 yamt */ 77 1.11.2.1 pgoyette #define IOMAP_INVALOFF 0xffffu 78 1.10 yamt 79 1.11 maxv /* 80 1.11 maxv * If we have an I/O bitmap, there is only one valid offset. 81 1.11 maxv */ 82 1.11 maxv #define IOMAP_VALIDOFF sizeof(struct i386tss) 83 1.11 maxv 84 1.7 fvdl #endif /* #ifndef _I386_TSS_H_ */ 85
Indexes created Tue Oct 21 19:09:51 GMT 2025