Annotation of sys/arch/sparc/sparc/locore2.c, Revision 1.1.1.1
1.1 nbrk 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
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
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: }
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