1 /* $OpenBSD: locore2.c,v 1.5 2003/06/02 23:27:55 millert Exp $ */
2 /* $NetBSD: locore2.c,v 1.7 1996/11/06 20:19:53 cgd 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/resourcevar.h>
53
54 #include <machine/cpu.h>
55
56 int whichqs;
57
58 /*
59 * Put process p on the run queue indicated by its priority.
60 * Calls should be made at splstatclock(), and p->p_stat should be SRUN.
61 */
62 void
setrunqueue(p)63 setrunqueue(p)
64 register struct proc *p;
65 {
66 register struct prochd *q;
67 register struct proc *oldlast;
68 register int which = p->p_priority >> 2;
69
70 if (p->p_back != NULL)
71 panic("setrunqueue");
72 q = &qs[which];
73 whichqs |= 1 << which;
74 p->p_forw = (struct proc *)q;
75 p->p_back = oldlast = q->ph_rlink;
76 q->ph_rlink = p;
77 oldlast->p_forw = p;
78 }
79
80 /*
81 * Remove process p from its run queue, which should be the one
82 * indicated by its priority. Calls should be made at splstatclock().
83 */
84 void
remrunqueue(p)85 remrunqueue(p)
86 register struct proc *p;
87 {
88 register int which = p->p_priority >> 2;
89 register struct prochd *q;
90
91 if ((whichqs & (1 << which)) == 0)
92 panic("remrunqueue");
93 p->p_forw->p_back = p->p_back;
94 p->p_back->p_forw = p->p_forw;
95 p->p_back = NULL;
96 q = &qs[which];
97 if (q->ph_link == (struct proc *)q)
98 whichqs &= ~(1 << which);
99 }
100