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NetBSD/sys/arch/i386/include/gdt.h

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Merge Bill Sommerfeld's i386 MP branch. This code has some known caveats, but works quite well in a lot of MP cases, and all UP cases that I have tested. Parts of this will hopefully be reworked in the not-too-distant future.
2002-10-01 16:56:36 +04:00
/* $NetBSD: gdt.h,v 1.9 2002/10/01 12:57:05 fvdl Exp $ */
Add the obligatory copyright notice.
1996-02-18 16:01:05 +03:00
Copyright assigned to the NetBSD Foundation
1996-02-28 01:28:09 +03:00
/*-
Some general cleanup: * Call gdt_init() earlier on. * Don't bother to check for TSS and LDT descriptors in verr_gdt(). * Nuke the sti special case for trace and breakpoint traps. * Move some variable declarations into more appropriate locations.
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* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
Copyright assigned to the NetBSD Foundation
1996-02-28 01:28:09 +03:00
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by John T. Kohl and Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
Fix tipo inherited from old version of TNF copyright template.
1997-10-09 12:48:33 +04:00
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
Copyright assigned to the NetBSD Foundation
1996-02-28 01:28:09 +03:00
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Add the obligatory copyright notice.
1996-02-18 16:01:05 +03:00
* POSSIBILITY OF SUCH DAMAGE.
*/
Merge Bill Sommerfeld's i386 MP branch. This code has some known caveats, but works quite well in a lot of MP cases, and all UP cases that I have tested. Parts of this will hopefully be reworked in the not-too-distant future.
2002-10-01 16:56:36 +04:00
#if !defined(_LOCORE)
Move the TSS selector out of the PCB and put it into mdproc. We 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.
2000-08-16 08:44:35 +04:00
struct proc;
Move the user-set LDT out of the PCB and into the pmap. Applications which set the LDT and share VM space (e.g. new versions of WINE) expect the LDT to be logically coupled to the address space. Use the new pmap_fork() interface to copy non-shared user-set LDTs when the address space is forked.
1999-05-12 23:28:28 +04:00
struct pmap;
Some general cleanup: * Call gdt_init() earlier on. * Don't bother to check for TSS and LDT descriptors in verr_gdt(). * Nuke the sti special case for trace and breakpoint traps. * Move some variable declarations into more appropriate locations.
1997-11-13 06:16:42 +03:00
void gdt_init __P((void));
Merge Bill Sommerfeld's i386 MP branch. This code has some known caveats, but works quite well in a lot of MP cases, and all UP cases that I have tested. Parts of this will hopefully be reworked in the not-too-distant future.
2002-10-01 16:56:36 +04:00
void gdt_init_cpu __P((struct cpu_info *));
void gdt_reload_cpu __P((struct cpu_info *));
void gdt_alloc_cpu __P((struct cpu_info *));
int tss_alloc __P((struct pcb *));
void tss_free __P((int));
Move the user-set LDT out of the PCB and into the pmap. Applications which set the LDT and share VM space (e.g. new versions of WINE) expect the LDT to be logically coupled to the address space. Use the new pmap_fork() interface to copy non-shared user-set LDTs when the address space is forked.
1999-05-12 23:28:28 +04:00
void ldt_alloc __P((struct pmap *, union descriptor *, size_t));
void ldt_free __P((struct pmap *));
Merge Bill Sommerfeld's i386 MP branch. This code has some known caveats, but works quite well in a lot of MP cases, and all UP cases that I have tested. Parts of this will hopefully be reworked in the not-too-distant future.
2002-10-01 16:56:36 +04:00
#endif /* LOCORE */
#define MINGDTSIZ 512
#define MAXGDTSIZ 8192