1 /* $NetBSD: pcb.h,v 1.14 1994/11/08 23:09:21 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)pcb.h 5.10 (Berkeley) 5/12/91 39 */ 40 41 /* 42 * Intel 386 process control block 43 */ 44 45 #ifndef _I386_PCB_H_ 46 #define _I386_PCB_H_ 47 48 #include <machine/segments.h> 49 #include <machine/tss.h> 50 #include <machine/npx.h> 51 52 struct pcb { 53 struct i386tss pcb_tss; 54 #define pcb_ksp pcb_tss.tss_esp0 55 #define pcb_ptd pcb_tss.tss_cr3 56 #define pcb_cr3 pcb_ptd 57 #define pcb_pc pcb_tss.tss_eip 58 #define pcb_psl pcb_tss.tss_eflags 59 #define pcb_usp pcb_tss.tss_esp 60 #define pcb_fp pcb_tss.tss_ebp 61 #ifdef notyet 62 u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ 63 #endif 64 caddr_t pcb_ldt; /* per process (user) LDT */ 65 int pcb_ldt_len; /* number of LDT entries */ 66 struct segment_descriptor pcb_ldt_desc; 67 struct save87 pcb_savefpu; /* floating point state for 287/387 */ 68 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 69 /* 70 * Software pcb (extension) 71 */ 72 int pcb_flags; 73 #ifdef notused 74 #define FP_WASUSED 0x01 /* process has used fltng pnt hardware */ 75 #define FP_NEEDSSAVE 0x02 /* ... that needs save on next context switch */ 76 #define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */ 77 #endif 78 #define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ 79 #define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */ 80 int pcb_iml; /* interrupt mask level */ 81 caddr_t pcb_onfault; /* copyin/out fault recovery */ 82 }; 83 84 /* 85 * The pcb is augmented with machine-dependent additional data for 86 * core dumps. For the i386, there is nothing to add. 87 */ 88 struct md_coredump { 89 long md_pad[8]; 90 }; 91 92 #ifdef KERNEL 93 struct pcb *curpcb; /* our current running pcb */ 94 #endif 95 96 #endif /* _I386_PCB_H_ */ 97