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Annotation of sys/arch/sparc64/sparc64/locore2.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: locore2.c,v 1.3 2003/06/02 23:27:56 millert Exp $     */
                      2: /*     $NetBSD: locore2.c,v 1.2 2000/05/26 21:20:21 thorpej Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1992, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This software was developed by the Computer Systems Engineering group
                      9:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
                     10:  * contributed to Berkeley.
                     11:  *
                     12:  * All advertising materials mentioning features or use of this software
                     13:  * must display the following acknowledgement:
                     14:  *     This product includes software developed by the University of
                     15:  *     California, Lawrence Berkeley Laboratory.
                     16:  *
                     17:  * Redistribution and use in source and binary forms, with or without
                     18:  * modification, are permitted provided that the following conditions
                     19:  * are met:
                     20:  * 1. Redistributions of source code must retain the above copyright
                     21:  *    notice, this list of conditions and the following disclaimer.
                     22:  * 2. Redistributions in binary form must reproduce the above copyright
                     23:  *    notice, this list of conditions and the following disclaimer in the
                     24:  *    documentation and/or other materials provided with the distribution.
                     25:  * 3. Neither the name of the University nor the names of its contributors
                     26:  *    may be used to endorse or promote products derived from this software
                     27:  *    without specific prior written permission.
                     28:  *
                     29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     39:  * SUCH DAMAGE.
                     40:  *
                     41:  *     @(#)locore2.c   8.4 (Berkeley) 12/10/93
                     42:  */
                     43:
                     44: /*
                     45:  * Primitives which are in locore.s on other machines,
                     46:  * but which have no reason to be assembly-coded on SPARC.
                     47:  */
                     48:
                     49: #include <sys/param.h>
                     50: #include <sys/systm.h>
                     51: #include <sys/proc.h>
                     52: #include <sys/sched.h>
                     53: #include <sys/resourcevar.h>
                     54:
                     55: #include <machine/cpu.h>
                     56:
                     57: /*
                     58:  * Put process p on the run queue indicated by its priority.
                     59:  * Calls should be made at splstatclock(), and p->p_stat should be SRUN.
                     60:  */
                     61: void
                     62: setrunqueue(p)
                     63:        register struct proc *p;
                     64: {
                     65:        register struct prochd *q;
                     66:        register struct proc *oldlast;
                     67:        register int which = p->p_priority >> 2;
                     68:
                     69:        if (p->p_back != NULL)
                     70:                panic("setrunqueue");
                     71:        q = &qs[which];
                     72:        whichqs |= 1 << which;
                     73:        p->p_forw = (struct proc *)q;
                     74:        p->p_back = oldlast = q->ph_rlink;
                     75:        q->ph_rlink = p;
                     76:        oldlast->p_forw = p;
                     77: }
                     78:
                     79: /*
                     80:  * Remove process p from its run queue, which should be the one
                     81:  * indicated by its priority.  Calls should be made at splstatclock().
                     82:  */
                     83: void
                     84: remrunqueue(p)
                     85:        register struct proc *p;
                     86: {
                     87:        register int which = p->p_priority >> 2;
                     88:        register struct prochd *q;
                     89:
                     90:        if ((whichqs & (1 << which)) == 0)
                     91:                panic("remrq");
                     92:        p->p_forw->p_back = p->p_back;
                     93:        p->p_back->p_forw = p->p_forw;
                     94:        p->p_back = NULL;
                     95:        q = &qs[which];
                     96:        if (q->ph_link == (struct proc *)q)
                     97:                whichqs &= ~(1 << which);
                     98: }