1/*	$NetBSD: enable.c,v 1.8 2008/04/28 20:23:38 martin Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Gordon W. Ross.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: enable.c,v 1.8 2008/04/28 20:23:38 martin Exp $");
34
35#include <sys/param.h>
36#include <uvm/uvm_extern.h>
37#include <machine/bus.h>
38#include <dev/sun/fbio.h>
39#include <sun3/dev/fbvar.h>
40#include <sun3/sun3/machdep.h>
41#include <sun3/sun3x/enable.h>
42#include <sun3/sun3x/obio.h>
43
44volatile short *enable_reg;
45
46void
47enable_init(void)
48{
49	vaddr_t va;
50
51	find_prom_map(OBIO_ENABLEREG, PMAP_OBIO, 2, &va);
52	enable_reg = (void *)va;
53}
54
55
56/*
57 * External interfaces to the system enable register.
58 */
59
60void
61enable_fpu(int on)
62{
63	int s;
64	short ena;
65
66	s = splhigh();
67	ena = *enable_reg;
68
69	if (on)
70		ena |= ENA_FPP;
71	else
72		ena &= ~ENA_FPP;
73
74	*enable_reg = ena;
75	splx(s);
76}
77
78void
79enable_video(int on)
80{
81	int s;
82	short ena;
83
84	s = splhigh();
85	ena = *enable_reg;
86
87	if (on)
88		ena |= ENA_VIDEO;
89	else
90		ena &= ~ENA_VIDEO;
91
92	*enable_reg = ena;
93	splx(s);
94}
95
96