97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
/* $NetBSD: pcb.h,v 1.14 1994/11/08 23:09:21 mycroft Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)pcb.h 5.10 (Berkeley) 5/12/91
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*/
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/*
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* Intel 386 process control block
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*/
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#ifndef _I386_PCB_H_
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#define _I386_PCB_H_
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#include <machine/segments.h>
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#include <machine/tss.h>
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#include <machine/npx.h>
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struct pcb {
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struct i386tss pcb_tss;
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#define pcb_ksp pcb_tss.tss_esp0
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#define pcb_ptd pcb_tss.tss_cr3
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#define pcb_cr3 pcb_ptd
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#define pcb_pc pcb_tss.tss_eip
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#define pcb_psl pcb_tss.tss_eflags
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#define pcb_usp pcb_tss.tss_esp
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#define pcb_fp pcb_tss.tss_ebp
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#ifdef notyet
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u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
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#endif
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caddr_t pcb_ldt; /* per process (user) LDT */
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int pcb_ldt_len; /* number of LDT entries */
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struct segment_descriptor pcb_ldt_desc;
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struct save87 pcb_savefpu; /* floating point state for 287/387 */
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struct emcsts pcb_saveemc; /* Cyrix EMC state */
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/*
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* Software pcb (extension)
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*/
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int pcb_flags;
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#ifdef notused
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#define FP_WASUSED 0x01 /* process has used fltng pnt hardware */
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#define FP_NEEDSSAVE 0x02 /* ... that needs save on next context switch */
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#define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */
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#endif
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#define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */
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#define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */
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int pcb_iml; /* interrupt mask level */
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caddr_t pcb_onfault; /* copyin/out fault recovery */
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};
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/*
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* The pcb is augmented with machine-dependent additional data for
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* core dumps. For the i386, there is nothing to add.
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*/
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struct md_coredump {
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long md_pad[8];
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};
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#ifdef KERNEL
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struct pcb *curpcb; /* our current running pcb */
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#endif
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#endif /* _I386_PCB_H_ */
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