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Annotation of Net2/arch/i386/include/pcb.h, revision 1.1.1.1

1.1       root        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       5.10 (Berkeley) 5/12/91
                     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: #ifdef KERNEL
                     75: struct pcb *curpcb;            /* our current running pcb */
                     76: #endif

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