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Annotation of sys/arch/powerpc/powerpc/Locore.c, Revision 1.1.1.1

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: }