freebsd-dev/sys/i386/include/pcb.h
Jason Evans 0384fff8c5 Major update to the way synchronization is done in the kernel. Highlights
include:

* Mutual exclusion is used instead of spl*().  See mutex(9).  (Note: The
  alpha port is still in transition and currently uses both.)

* Per-CPU idle processes.

* Interrupts are run in their own separate kernel threads and can be
  preempted (i386 only).

Partially contributed by:	BSDi (BSD/OS)
Submissions by (at least):	cp, dfr, dillon, grog, jake, jhb, sheldonh
2000-09-07 01:33:02 +00:00

98 lines
3.1 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
* $FreeBSD$
*/
#ifndef _I386_PCB_H_
#define _I386_PCB_H_
/*
* Intel 386 process control block
*/
#include <machine/globals.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;
int pcb_dr0;
int pcb_dr1;
int pcb_dr2;
int pcb_dr3;
int pcb_dr6;
int pcb_dr7;
#ifdef USER_LDT
struct pcb_ldt *pcb_ldt; /* per process (user) LDT */
#else
struct pcb_ldt *pcb_ldt_dontuse;
#endif
struct save87 pcb_savefpu; /* floating point state for 287/387 */
u_char pcb_flags;
#define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */
#define PCB_DBREGS 0x02 /* process using debug registers */
caddr_t pcb_onfault; /* copyin/out fault recovery */
int pcb_schednest;
int pcb_gs;
struct pcb_ext *pcb_ext; /* optional pcb extension */
u_long __pcb_spare[3]; /* adjust to avoid core dump size changes */
};
/*
* The pcb is augmented with machine-dependent additional data for
* core dumps. For the i386: ???
*/
struct md_coredump {
};
#ifdef _KERNEL
#ifndef curpcb
extern struct pcb *curpcb; /* our current running pcb */
#endif
void savectx __P((struct pcb *));
#endif
#endif /* _I386_PCB_H_ */