pcb.h revision 557
1178476Sjb/*- 2178476Sjb * Copyright (c) 1990 The Regents of the University of California. 3178476Sjb * All rights reserved. 4178476Sjb * 5178476Sjb * This code is derived from software contributed to Berkeley by 6178476Sjb * William Jolitz. 7178476Sjb * 8178476Sjb * Redistribution and use in source and binary forms, with or without 9178476Sjb * modification, are permitted provided that the following conditions 10178476Sjb * are met: 11178476Sjb * 1. Redistributions of source code must retain the above copyright 12178476Sjb * notice, this list of conditions and the following disclaimer. 13178476Sjb * 2. Redistributions in binary form must reproduce the above copyright 14178476Sjb * notice, this list of conditions and the following disclaimer in the 15178476Sjb * documentation and/or other materials provided with the distribution. 16178476Sjb * 3. All advertising materials mentioning features or use of this software 17178476Sjb * must display the following acknowledgement: 18178476Sjb * This product includes software developed by the University of 19178476Sjb * California, Berkeley and its contributors. 20178476Sjb * 4. Neither the name of the University nor the names of its contributors 21178476Sjb * may be used to endorse or promote products derived from this software 22178476Sjb * without specific prior written permission. 23178476Sjb * 24178476Sjb * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25178476Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26178476Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27178476Sjb * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28178476Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29178476Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30178476Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31178476Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32178476Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33178476Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34178476Sjb * SUCH DAMAGE. 35178476Sjb * 36178476Sjb * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 37178476Sjb * $Id$ 38178476Sjb */ 39178476Sjb 40178476Sjb#ifndef _I386_PCB_H_ 41178476Sjb#define _I386_PCB_H_ 42178476Sjb 43178476Sjb/* 44178476Sjb * Intel 386 process control block 45178476Sjb */ 46178476Sjb#include "machine/tss.h" 47178476Sjb#include "machine/npx.h" 48178476Sjb 49178476Sjbstruct pcb { 50178476Sjb struct i386tss pcb_tss; 51178476Sjb#define pcb_ksp pcb_tss.tss_esp0 52178476Sjb#define pcb_ptd pcb_tss.tss_cr3 53178476Sjb#define pcb_cr3 pcb_ptd 54178476Sjb#define pcb_pc pcb_tss.tss_eip 55178476Sjb#define pcb_psl pcb_tss.tss_eflags 56178476Sjb#define pcb_usp pcb_tss.tss_esp 57178476Sjb#define pcb_fp pcb_tss.tss_ebp 58178476Sjb#ifdef notyet 59178476Sjb u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ 60178476Sjb#endif 61178476Sjb caddr_t pcb_ldt; /* per process (user) LDT */ 62178476Sjb int pcb_ldt_len; /* number of LDT entries */ 63178476Sjb struct save87 pcb_savefpu; /* floating point state for 287/387 */ 64178476Sjb struct emcsts pcb_saveemc; /* Cyrix EMC state */ 65178476Sjb/* 66178476Sjb * Software pcb (extension) 67178476Sjb */ 68178476Sjb int pcb_flags; 69178476Sjb#ifdef notused 70178476Sjb#define FP_WASUSED 0x01 /* process has used fltng pnt hardware */ 71178476Sjb#define FP_NEEDSSAVE 0x02 /* ... that needs save on next context switch */ 72178476Sjb#define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */ 73178476Sjb#endif 74178476Sjb#define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ 75178476Sjb#define FM_TRAP 0x10 /* process entered kernel on a trap frame */ 76178476Sjb#define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */ 77178476Sjb short pcb_iml; /* interrupt mask level */ 78178476Sjb caddr_t pcb_onfault; /* copyin/out fault recovery */ 79178476Sjb long pcb_sigc[8]; /* XXX signal code trampoline */ 80178476Sjb int pcb_cmap2; /* XXX temporary PTE - will prefault instead */ 81178476Sjb}; 82211545Srpaulo 83#ifdef KERNEL 84struct pcb *curpcb; /* our current running pcb */ 85#endif 86 87#endif /* _I386_PCB_H_ */ 88