sys/arch/i386/include/pcb.h

   1 /*      $NetBSD: pcb.h,v 1.54 2014/04/21 19:13:22 christos Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1998, 2009 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum, and by Andrew Doran.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*-
  33  * Copyright (c) 1990 The Regents of the University of California.
  34  * All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * William Jolitz.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)pcb.h       5.10 (Berkeley) 5/12/91
  64  */
  65
  66 /*
  67  * Intel 386 process control block
  68  */
  69
  70 #ifndef _I386_PCB_H_
  71 #define _I386_PCB_H_
  72
  73 #if defined(_KERNEL_OPT)
  74 #include "opt_multiprocessor.h"
  75 #endif
  76
  77 #include <machine/segments.h>
  78 #include <x86/cpu_extended_state.h>
  79
  80 struct pcb {
  81         int     pcb_esp0;               /* ring0 esp */
  82         int     pcb_esp;                /* kernel esp */
  83         int     pcb_ebp;                /* kernel ebp */
  84         int     pcb_cr0;                /* saved image of CR0 */
  85         int     pcb_cr2;                /* page fault address (CR2) */
  86         int     pcb_cr3;                /* page directory pointer */
  87         int     pcb_iopl;               /* i/o privilege level */
  88
  89         struct segment_descriptor pcb_fsd;      /* %fs descriptor */
  90         struct segment_descriptor pcb_gsd;      /* %gs descriptor */
  91         void    *pcb_onfault;           /* copyin/out fault recovery */
  92         int     vm86_eflags;            /* virtual eflags for vm86 mode */
  93         int     vm86_flagmask;          /* flag mask for vm86 mode */
  94         void    *vm86_userp;            /* XXX performance hack */
  95         char    *pcb_iomap;             /* I/O permission bitmap */
  96
  97         int     not_used[15];
  98
  99         /* floating point state */
 100         struct cpu_info *pcb_fpcpu;     /* cpu holding our fp state. */
 101         union savefpu   pcb_savefpu __aligned(64);
 102         /* **** DO NOT ADD ANYTHING HERE **** */
 103
 104 };
 105 #ifndef __lint__
 106 /* This doesn't really matter, but there is a lot of implied padding */
 107 __CTASSERT(sizeof(struct pcb) - sizeof (union savefpu) == 128);
 108 #endif
 109
 110 #endif /* _I386_PCB_H_ */