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Annotation of sys/arch/powerpc/powerpc/Locore.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: Locore.c,v 1.10 2003/10/15 02:43:09 drahn Exp $       */
        !             2:
        !             3: /*
        !             4:  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
        !             5:  * Copyright (C) 1995, 1996 TooLs GmbH.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. All advertising materials mentioning features or use of this software
        !            17:  *    must display the following acknowledgement:
        !            18:  *     This product includes software developed by TooLs GmbH.
        !            19:  * 4. The name of TooLs GmbH may not be used to endorse or promote products
        !            20:  *    derived from this software without specific prior written permission.
        !            21:  *
        !            22:  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
        !            23:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            24:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            25:  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
        !            26:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
        !            27:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
        !            28:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
        !            29:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
        !            30:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
        !            31:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            32:  */
        !            33:
        !            34: /*
        !            35:  * Some additional routines that happened to be in locore.S traditionally,
        !            36:  * but have no need to be coded in assembly.
        !            37:  */
        !            38:
        !            39: #include <sys/param.h>
        !            40: #include <sys/proc.h>
        !            41: #include <sys/systm.h>
        !            42:
        !            43: extern int whichqs;
        !            44:
        !            45: /*
        !            46:  * Put process p on the run queue, given by its priority.
        !            47:  * Calls should be made at splstatclock(), and p->p_stat should be SRUN.
        !            48:  */
        !            49: void
        !            50: setrunqueue(struct proc *p)
        !            51: {
        !            52:        struct  prochd *q;
        !            53:        struct proc *oldlast;
        !            54:        int which = p->p_priority >> 2;
        !            55:
        !            56: #ifdef DIAGNOSTIC
        !            57:        if (p->p_back)
        !            58:                panic("setrunqueue");
        !            59: #endif
        !            60:        q = &qs[which];
        !            61:        whichqs |= 0x80000000 >> which;
        !            62:        p->p_forw = (struct proc *)q;
        !            63:        p->p_back = oldlast = q->ph_rlink;
        !            64:        q->ph_rlink = p;
        !            65:        oldlast->p_forw = p;
        !            66: }
        !            67:
        !            68: /*
        !            69:  * Remove process p from its run queue, given by its priority.
        !            70:  * Calls should be made at splstatclock().
        !            71:  */
        !            72: void
        !            73: remrunqueue(struct proc *p)
        !            74: {
        !            75:        int which = p->p_priority >> 2;
        !            76:        struct prochd *q;
        !            77:
        !            78: #ifdef DIAGNOSTIC
        !            79:        if (!(whichqs & (0x80000000 >> which)))
        !            80:                panic("remrunqueue");
        !            81: #endif
        !            82:        p->p_forw->p_back = p->p_back;
        !            83:        p->p_back->p_forw = p->p_forw;
        !            84:        p->p_back = NULL;
        !            85:        q = &qs[which];
        !            86:        if (q->ph_link == (struct proc *)q)
        !            87:                whichqs &= ~(0x80000000 >> which);
        !            88: }