1 /* $NetBSD: fpu_machdep.c,v 1.2 2022/07/02 08:35:49 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 1996 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 /*
33 * Floating Point Unit (MC68881/882/040) initialization.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: fpu_machdep.c,v 1.2 2022/07/02 08:35:49 tsutsui Exp $");
38
39 #include "opt_fpu_emulate.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/time.h>
44 #include <sys/kernel.h>
45 #include <sys/device.h>
46
47 #include <machine/psl.h>
48 #include <machine/cpu.h>
49 #include <machine/frame.h>
50
51 extern int fpu_type;
52 extern int *nofault;
53
54 static const char *fpu_descr[] = {
55 #ifdef FPU_EMULATE
56 [FPU_NONE] = " emulated ",
57 #else
58 [FPU_NONE] = " no ",
59 #endif
60 [FPU_68881] = " MC68881 ",
61 [FPU_68882] = " MC68882 ",
62 [FPU_68040] = "/",
63 [FPU_68060] = "/",
64 [FPU_UNKNOWN] = "??? "
65 };
66
67 const char *
fpu_describe(int type)68 fpu_describe(int type)
69 {
70 int maxtype = sizeof(fpu_descr)/sizeof(fpu_descr[0]) - 1;
71
72 if ((type < 0) || (type > maxtype))
73 type = 0;
74 return fpu_descr[type];
75 }
76