b0dc085df7
need to access this when we have the proclist locked for reading, and thus cannot store it in the PCB (which may be swapped out). As part of this, call pmap_activate() from cpu_switch() to switch to the new address space, and refresh the PCB's copy of the LDT selector from the pmap structure (see above paragraph). We need to do this for MP support anyhow. Fixes a "panic: spinlock_switchcheck: CPU 0 has 1 spin locks" via gdt_compact() reported by Nathan Williams.
130 lines
5.2 KiB
C
130 lines
5.2 KiB
C
/* $NetBSD: pcb.h,v 1.27 2000/08/16 04:44:37 thorpej Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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 <sys/signal.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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#include <machine/sysarch.h>
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#define NIOPORTS 1024 /* # of ports we allow to be mapped */
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struct pcb {
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struct i386tss pcb_tss;
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#define pcb_cr3 pcb_tss.tss_cr3
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#define pcb_esp pcb_tss.tss_esp
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#define pcb_ebp pcb_tss.tss_ebp
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#define pcb_fs pcb_tss.tss_fs
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#define pcb_gs pcb_tss.tss_gs
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#define pcb_ldt_sel pcb_tss.tss_ldt
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int pcb_cr0; /* saved image of CR0 */
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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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#define PCB_USER_LDT 0x01 /* has user-set LDT */
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caddr_t pcb_onfault; /* copyin/out fault recovery */
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int vm86_eflags; /* virtual eflags for vm86 mode */
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int vm86_flagmask; /* flag mask for vm86 mode */
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void *vm86_userp; /* XXX performance hack */
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u_long pcb_iomap[NIOPORTS/32]; /* I/O bitmap */
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struct pmap *pcb_pmap; /* back pointer to our pmap */
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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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