fa3f9daae5
the TLB and ~1600 if it is not. Therefore, it is more effecient to invalidate the TLB after operations that use CMAP rather than before. - So that the tlb is invalidated prior to switching off of a processor, we must change the switchin functions to switchout functions. - Remove td_switchout from the thread and move it to the x86 pcb. - Move the code that calls switchout into swtch.s. These changes make this optimization truely x86 specific.
85 lines
2.9 KiB
C
85 lines
2.9 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/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;
|
|
|
|
union savefpu pcb_save;
|
|
u_int pcb_flags;
|
|
#define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */
|
|
#define PCB_DBREGS 0x02 /* process using debug registers */
|
|
#define PCB_NPXTRAP 0x04 /* npx trap pending */
|
|
#define PCB_NPXINITDONE 0x08 /* fpu state is initialized */
|
|
#define PCB_VM86CALL 0x10 /* in vm86 call */
|
|
|
|
caddr_t pcb_onfault; /* copyin/out fault recovery */
|
|
int pcb_gs;
|
|
struct pcb_ext *pcb_ext; /* optional pcb extension */
|
|
int pcb_psl; /* process status long */
|
|
void (*pcb_switchout)(void); /* Special switchout function. */
|
|
u_long __pcb_spare[1]; /* adjust to avoid core dump size changes */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
void savectx(struct pcb *);
|
|
#endif
|
|
|
|
#endif /* _I386_PCB_H_ */
|