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Annotation of sys/arch/sparc64/sparc64/locore2.c, Revision 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: }