freebsd-dev/sys/i386/include/pcb.h
Peter Wemm 477a642cee Man the liferafts! Here comes the long awaited SMP -> -current merge!
There are various options documented in i386/conf/LINT, there is more to
come over the next few days.

The kernel should run pretty much "as before" without the options to
activate SMP mode.

There are a handful of known "loose ends" that need to be fixed, but
have been put off since the SMP kernel is in a moderately good condition
at the moment.

This commit is the result of the tinkering and testing over the last 14
months by many people.  A special thanks to Steve Passe for implementing
the APIC code!
1997-04-26 11:46:25 +00:00

92 lines
3.2 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: @(#)pcb.h 5.10 (Berkeley) 5/12/91
* $Id: pcb.h,v 1.19 1997/04/07 06:45:18 peter Exp $
*/
#ifndef _I386_PCB_H_
#define _I386_PCB_H_
/*
* Intel 386 process control block
*/
#include <machine/tss.h>
#include <machine/npx.h>
struct pcb {
int pcb_cr3;
int pcb_edi;
int pcb_esi;
int pcb_ebp;
int pcb_esp;
int pcb_ebx;
int pcb_eip;
caddr_t pcb_ldt; /* per process (user) LDT */
int pcb_ldt_len; /* number of LDT entries */
struct save87 pcb_savefpu; /* floating point state for 287/387 */
u_char pcb_flags;
#define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */
caddr_t pcb_onfault; /* copyin/out fault recovery */
u_long pcb_mpnest;
u_long __pcb_spare[7]; /* adjust to avoid core dump size changes */
#if 0 /* some day we may switch between procs that have their own i386tss */
struct i386tss pcb_tss;
u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
#endif
};
/*
* The pcb is augmented with machine-dependent additional data for
* core dumps. For the i386: ???
*/
struct md_coredump {
};
#ifdef KERNEL
#include "opt_smp.h"
#include <machine/smp.h>
#ifdef SMP
#define curpcb (SMPcurpcb[cpunumber()])
#else /* !SMP */
extern struct pcb *curpcb; /* our current running pcb */
#endif /* SMP */
void savectx __P((struct pcb*));
#endif
#endif /* _I386_PCB_H_ */