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