5206bca10a
- %fs register is added to trapframe and saved/restored upon kernel entry/exit. - Per-cpu pages are no longer mapped at the same virtual address. - Each cpu now has a separate gdt selector table. A new segment selector is added to point to per-cpu pages, per-cpu global variables are now accessed through this new selector (%fs). The selectors in gdt table are rearranged for cache line optimization. - fask_vfork is now on as default for both UP and SMP. - Some aio code cleanup. Reviewed by: Alan Cox <alc@cs.rice.edu> John Dyson <dyson@iquest.net> Julian Elischer <julian@whistel.com> Bruce Evans <bde@zeta.org.au> David Greenman <dg@root.com>
92 lines
3.6 KiB
C
92 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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 University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University 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 REGENTS 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 PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 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 POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)tss.h 5.4 (Berkeley) 1/18/91
|
|
* $Id: tss.h,v 1.8 1997/02/22 09:35:20 peter Exp $
|
|
*/
|
|
|
|
#ifndef _MACHINE_TSS_H_
|
|
#define _MACHINE_TSS_H_ 1
|
|
|
|
#include <machine/globals.h>
|
|
|
|
/*
|
|
* Intel 386 Context Data Type
|
|
*/
|
|
|
|
struct i386tss {
|
|
int tss_link; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_esp0; /* kernel stack pointer privilege level 0 */
|
|
#define tss_ksp tss_esp0
|
|
int tss_ss0; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_esp1; /* kernel stack pointer privilege level 1 */
|
|
int tss_ss1; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_esp2; /* kernel stack pointer privilege level 2 */
|
|
int tss_ss2; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_cr3; /* page table directory */
|
|
#define tss_ptd tss_cr3
|
|
int tss_eip; /* program counter */
|
|
#define tss_pc tss_eip
|
|
int tss_eflags; /* program status longword */
|
|
#define tss_psl tss_eflags
|
|
int tss_eax;
|
|
int tss_ecx;
|
|
int tss_edx;
|
|
int tss_ebx;
|
|
int tss_esp; /* user stack pointer */
|
|
#define tss_usp tss_esp
|
|
int tss_ebp; /* user frame pointer */
|
|
#define tss_fp tss_ebp
|
|
int tss_esi;
|
|
int tss_edi;
|
|
int tss_es; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_cs; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_ss; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_ds; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_fs; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_gs; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_ldt; /* actually 16 bits: top 16 bits must be zero */
|
|
int tss_ioopt; /* options & io offset bitmap: currently zero */
|
|
/* XXX unimplemented .. i/o permission bitmap */
|
|
};
|
|
|
|
#ifdef KERNEL
|
|
#ifndef common_tss
|
|
extern struct i386tss common_tss;
|
|
#endif
|
|
#endif
|
|
|
|
#endif /* _MACHINE_TSS_H_ */
|