pcb.h revision 4
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 * 364Srgrimes * @(#)pcb.h 5.10 (Berkeley) 5/12/91 374Srgrimes * 384Srgrimes * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE 394Srgrimes * -------------------- ----- ---------------------- 404Srgrimes * CURRENT PATCH LEVEL: 1 00154 414Srgrimes * -------------------- ----- ---------------------- 424Srgrimes * 434Srgrimes * 20 Apr 93 Bruce Evans New npx-0.5 code 444Srgrimes * 454Srgrimes */ 464Srgrimes 474Srgrimes/* 484Srgrimes * Intel 386 process control block 494Srgrimes */ 504Srgrimes#include "machine/tss.h" 514Srgrimes#include "machine/npx.h" 524Srgrimes 534Srgrimesstruct pcb { 544Srgrimes struct i386tss pcb_tss; 554Srgrimes#define pcb_ksp pcb_tss.tss_esp0 564Srgrimes#define pcb_ptd pcb_tss.tss_cr3 574Srgrimes#define pcb_cr3 pcb_ptd 584Srgrimes#define pcb_pc pcb_tss.tss_eip 594Srgrimes#define pcb_psl pcb_tss.tss_eflags 604Srgrimes#define pcb_usp pcb_tss.tss_esp 614Srgrimes#define pcb_fp pcb_tss.tss_ebp 624Srgrimes#ifdef notyet 634Srgrimes u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ 644Srgrimes#endif 654Srgrimes struct save87 pcb_savefpu; /* floating point state for 287/387 */ 664Srgrimes struct emcsts pcb_saveemc; /* Cyrix EMC state */ 674Srgrimes/* 684Srgrimes * Software pcb (extension) 694Srgrimes */ 704Srgrimes int pcb_flags; 714Srgrimes#ifdef notused 724Srgrimes#define FP_WASUSED 0x01 /* process has used fltng pnt hardware */ 734Srgrimes#define FP_NEEDSSAVE 0x02 /* ... that needs save on next context switch */ 744Srgrimes#define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */ 754Srgrimes#endif 764Srgrimes#define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ 774Srgrimes#define FM_TRAP 0x10 /* process entered kernel on a trap frame */ 784Srgrimes#define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */ 794Srgrimes short pcb_iml; /* interrupt mask level */ 804Srgrimes caddr_t pcb_onfault; /* copyin/out fault recovery */ 814Srgrimes long pcb_sigc[8]; /* XXX signal code trampoline */ 824Srgrimes int pcb_cmap2; /* XXX temporary PTE - will prefault instead */ 834Srgrimes}; 844Srgrimes 854Srgrimes#ifdef KERNEL 864Srgrimesstruct pcb *curpcb; /* our current running pcb */ 874Srgrimes#endif 88