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 * @(#)pcb.h 5.11 (Berkeley) 10/11/92 37 */ 38 39 /* 40 * Intel 386 process control block 41 */ 42 #include <machine/tss.h> 43 #include <machine/npx.h> 44 45 struct pcb { 46 struct i386tss pcb_tss; 47 #define pcb_ksp pcb_tss.tss_esp0 48 #define pcb_ptd pcb_tss.tss_cr3 49 #define pcb_cr3 pcb_ptd 50 #define pcb_pc pcb_tss.tss_eip 51 #define pcb_psl pcb_tss.tss_eflags 52 #define pcb_usp pcb_tss.tss_esp 53 #define pcb_fp pcb_tss.tss_ebp 54 #ifdef notyet 55 u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ 56 #endif 57 struct save87 pcb_savefpu; /* floating point state for 287/387 */ 58 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 59 /* 60 * Software pcb (extension) 61 */ 62 int pcb_flags; 63 #define FP_WASUSED 0x01 /* floating point has been used in this proc */ 64 #define FP_NEEDSSAVE 0x02 /* needs save on next context switch */ 65 #define FP_NEEDSRESTORE 0x04 /* need restore on next DNA fault */ 66 #define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ 67 #define FM_TRAP 0x10 /* process entered kernel on a trap frame */ 68 short pcb_iml; /* interrupt mask level */ 69 caddr_t pcb_onfault; /* copyin/out fault recovery */ 70 long pcb_sigc[8]; /* XXX signal code trampoline */ 71 int pcb_cmap2; /* XXX temporary PTE - will prefault instead */ 72 }; 73 74 /* 75 * The pcb is augmented with machine-dependent additional data for 76 * core dumps. For the i386: ??? 77 */ 78 struct md_coredump { 79 int pad; /* XXX? -- cgd */ 80 }; 81 82 #ifdef KERNEL 83 struct pcb *curpcb; /* our current running pcb */ 84 #endif 85