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freebsd-skq/sys/i386/include/pcb.h

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Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*-
* 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.
* 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.
*
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
* from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
#ifndef _I386_PCB_H_
#define _I386_PCB_H_
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Intel 386 process control block
*/
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <machine/npx.h>
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
struct pcb {
No longer use an i386tss as the basis of our pcb - it wasn't particularly convenient and makes life difficult for my next commit. We still need an i386tss to point to for the tss slot in the gdt, so we use a common tss shared between all processes. Note that this is going to break debugging until this series of commits is finished. core dumps will change again too. :-( we really need a more modern core dump format that doesn't depend on the pcb/upages. This change makes VM86 mode harder, but the following commits will remove a lot of constraints for the VM86 system, including the possibility of extending the pcb for an IO port map etc. Obtained from: bde
1997-04-07 06:45:18 +00:00
int pcb_cr3;
int pcb_edi;
int pcb_esi;
int pcb_ebp;
int pcb_esp;
int pcb_ebx;
int pcb_eip;
Implement support for hardware debug registers on the i386. Submitted by: Brian Dean <brdean@unx.sas.com>
1999-07-09 04:16:00 +00:00
int pcb_dr0;
int pcb_dr1;
int pcb_dr2;
int pcb_dr3;
int pcb_dr6;
int pcb_dr7;
Activate SSE/SIMD. This is the extra context switching support that we are required to do if we let user processes use the extra 128 bit registers etc. This is the base part of the diff I got from: http://www.issei.org/issei/FreeBSD/sse.html I believe this is by: Mr. SUZUKI Issei <issei@issei.org> SMP support apparently by: Takekazu KATO <kato@chino.it.okayama-u.ac.jp> Test code by: NAKAMURA Kazushi <kaz@kobe1995.net>, see http://kobe1995.net/~kaz/FreeBSD/SSE.en.html I have fixed a couple of style(9) deviations. I have some followup commits to fix a couple of non-style things.
2001-07-12 06:32:51 +00:00
union savefpu pcb_save;
Changed the type of pcb_flags from u_char to u_int and adjusted things. This removes the only atomic operation on a char type in the entire kernel.
2002-01-17 17:49:23 +00:00
u_int pcb_flags;
Killed some unused stuff inherited from Bill Jolitz. Note that since this changes the size of the pcb struct, gdb will need to be rebuilt or debugging won't work correctly. Reviewed by: Bruce Evans
1995-08-17 11:30:03 +00:00
#define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */
Implement support for hardware debug registers on the i386. Submitted by: Brian Dean <brdean@unx.sas.com>
1999-07-09 04:16:00 +00:00
#define PCB_DBREGS 0x02 /* process using debug registers */
Convert npx interrupts into traps instead of vice versa. This is much simpler for npx exceptions that start as traps (no assembly required...) and works better for npx exceptions that start as interrupts (there is no longer a problem for nested interrupts). Submitted by: original (pre-SMPng) version by luoqi
2001-05-22 21:20:49 +00:00
#define PCB_NPXTRAP 0x04 /* npx trap pending */
Add kernel support needed for the KSE-aware libpthread: - Maintain fpu state across signals. - Save and restore FPU state properly in ucontext_t's. Reviewed by: deischen, julian Approved by: -arch
2002-09-16 19:25:41 +00:00
#define PCB_NPXINITDONE 0x08 /* fpu state is initialized */
1.Fix smp race between kernel vm86 BIOS calling and userland vm86 mode code, remove global variable in_vm86call, set vm86 calling flag in PCB flags. 2.Fix vm86 BIOS calling preempted problem by changing vm86_lock mutex type from MTX_DEF to MTX_SPIN. vm86pcb is not remembered in thread struct, when the thread calling vm86 BIOS is preempted by interrupt thread, and later switching back to the thread would cause incorrect context be loaded into CPU registers, this leads to kernel crash.
2002-11-07 01:34:23 +00:00
#define PCB_VM86CALL 0x10 /* in vm86 call */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
caddr_t pcb_onfault; /* copyin/out fault recovery */
Preserve %fs and %gs across context switches. This has a relatively low cost since it is only done in cpu_switch(), not for every exception. The extra state is kept in the pcb, and handled much like the npx state, with similar deficiencies (the state is not preserved across signal handlers, and error handling loses state).
1997-06-07 04:36:10 +00:00
int pcb_gs;
VM86 kernel support. Work done by BSDI, Jonathan Lemon <jlemon@americantv.com>, Mike Smith <msmith@gsoft.com.au>, Sean Eric Fagan <sef@kithrup.com>, and probably alot of others. Submitted by: Jnathan Lemon <jlemon@americantv.com>
1997-08-09 00:04:06 +00:00
struct pcb_ext *pcb_ext; /* optional pcb extension */
Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt disablement assumptions in kern_fork.c by adding another API call, cpu_critical_fork_exit(). Cleanup the td_savecrit field by moving it from MI to MD. Temporarily move cpu_critical*() from <arch>/include/cpufunc.h to <arch>/<arch>/critical.c (stage-2 will clean this up). Implement interrupt deferral for i386 that allows interrupts to remain enabled inside critical sections. This also fixes an IPI interlock bug, and requires uses of icu_lock to be enclosed in a true interrupt disablement. This is the stage-1 commit. Stage-2 will occur after stage-1 has stabilized, and will move cpu_critical*() into its own header file(s) + other things. This commit may break non-i386 architectures in trivial ways. This should be temporary. Reviewed by: core Approved by: core
2002-03-27 05:39:23 +00:00
int pcb_psl; /* process status long */
- On my Pentium4-M laptop, invalpg takes ~1100 cycles if the page is found in 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.
2003-09-30 08:11:36 +00:00
void (*pcb_switchout)(void); /* Special switchout function. */
u_long __pcb_spare[1]; /* adjust to avoid core dump size changes */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
};
Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
1999-12-29 04:46:21 +00:00
#ifdef _KERNEL
Remove __P.
2002-03-20 05:48:58 +00:00
void savectx(struct pcb *);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#endif
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
#endif /* _I386_PCB_H_ */
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