1 /* $NetBSD: enable.c,v 1.9 2013/09/06 17:43:19 tsutsui 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 1.9 2013/09/06 17:43:19 tsutsui 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
44 volatile short *enable_reg;
45
46 void
enable_init(void)47 enable_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
60 void
enable_fpu(int on)61 enable_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
78 void
enable_video(int on)79 enable_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