5813dc03bd
in mi_switch() just before calling cpu_switch() so that the first switch after a resched request will satisfy the request. - While I'm at it, move a few things into mi_switch() and out of cpu_switch(), specifically set the p_oncpu and p_lastcpu members of proc in mi_switch(), and handle the sched_lock state change across a context switch in mi_switch(). - Since cpu_switch() no longer handles the sched_lock state change, we have to setup an initial state for sched_lock in fork_exit() before we release it.
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/* $FreeBSD$ */
|
|
/* From: NetBSD: pcb.h,v 1.6 1997/04/06 08:47:33 cgd Exp */
|
|
|
|
/*
|
|
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Chris G. Demetriou
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*/
|
|
|
|
#include <machine/frame.h>
|
|
#include <machine/reg.h>
|
|
#include <machine/globaldata.h>
|
|
#include <machine/alpha_cpu.h>
|
|
|
|
/*
|
|
* PCB: process control block
|
|
*
|
|
* In this case, the hardware structure that is the defining element
|
|
* for a process, and the additional state that must be saved by software
|
|
* on a context switch. Fields marked [HW] are mandated by hardware; fields
|
|
* marked [SW] are for the software.
|
|
*
|
|
* It's said in the VMS PALcode section of the AARM that the pcb address
|
|
* passed to the swpctx PALcode call has to be a physical address. Not
|
|
* knowing this (and trying a virtual) address proved this correct.
|
|
* So we cache the physical address of the pcb in the md_proc struct.
|
|
*/
|
|
struct pcb {
|
|
struct alpha_pcb pcb_hw; /* PALcode defined */
|
|
unsigned long pcb_context[9]; /* s[0-6], ra, ps [SW] */
|
|
struct fpreg pcb_fp; /* FP registers [SW] */
|
|
u_int64_t pcb_fp_control; /* IEEE control word [SW] */
|
|
unsigned long pcb_onfault; /* for copy faults [SW] */
|
|
unsigned long pcb_accessaddr; /* for [fs]uswintr [SW] */
|
|
};
|
|
|
|
/*
|
|
* The pcb is augmented with machine-dependent additional data for
|
|
* core dumps. For the Alpha, that's a trap frame and the floating
|
|
* point registers.
|
|
*/
|
|
struct md_coredump {
|
|
struct trapframe md_tf;
|
|
struct fpreg md_fpstate;
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
#ifndef curpcb
|
|
extern struct pcb *curpcb; /* our current running pcb */
|
|
#endif
|
|
#endif
|