1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 37 * $Id: pcb.h,v 1.6 1993/06/27 04:50:12 andrew Exp $ 38 */ 39 40 #ifndef _I386_PCB_H_ 41 #define _I386_PCB_H_ 42 43 /* 44 * Intel 386 process control block 45 */ 46 #include "machine/tss.h" 47 #include "machine/npx.h" 48 49 struct pcb { 50 struct i386tss pcb_tss; 51 #define pcb_ksp pcb_tss.tss_esp0 52 #define pcb_ptd pcb_tss.tss_cr3 53 #define pcb_cr3 pcb_ptd 54 #define pcb_pc pcb_tss.tss_eip 55 #define pcb_psl pcb_tss.tss_eflags 56 #define pcb_usp pcb_tss.tss_esp 57 #define pcb_fp pcb_tss.tss_ebp 58 #ifdef notyet 59 u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ 60 #endif 61 struct save87 pcb_savefpu; /* floating point state for 287/387 */ 62 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 63 /* 64 * Software pcb (extension) 65 */ 66 int pcb_flags; 67 #ifdef notused 68 #define FP_WASUSED 0x01 /* process has used fltng pnt hardware */ 69 #define FP_NEEDSSAVE 0x02 /* ... that needs save on next context switch */ 70 #define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */ 71 #endif 72 #define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ 73 #define FM_TRAP 0x10 /* process entered kernel on a trap frame */ 74 #define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */ 75 short pcb_iml; /* interrupt mask level */ 76 caddr_t pcb_onfault; /* copyin/out fault recovery */ 77 int pcb_cmap2; /* XXX temporary PTE - will prefault instead */ 78 }; 79 80 #ifdef KERNEL 81 struct pcb *curpcb; /* our current running pcb */ 82 #endif 83 84 #endif /* _I386_PCB_H_ */ 85