1 /* $NetBSD: fpu_machdep.c,v 1.1 2011/11/15 12:23:22 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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: fpu_machdep.c,v 1.1 2011/11/15 12:23:22 tsutsui Exp $");
34
35 #include "opt_fpu_emulate.h"
36
37 /*
38 * Floating Point Unit (MC68881/882/040) initialization.
39 */
40
41 #include <sys/param.h>
42
43 #include <machine/cpu.h>
44 #include <machine/frame.h>
45
46 /*
47 * FPU type; emulator uses FPU_NONE
48 */
49
50 extern label_t *nofault;
51
52 static const char *fpu_descr[] = {
53 #ifdef FPU_EMULATE
54 [FPU_NONE] = "emulator",
55 #else
56 [FPU_NONE] = "no math support",
57 #endif
58 [FPU_68881] = "mc68881",
59 [FPU_68882] = "mc68882",
60 [FPU_68040] = "mc68040",
61 [FPU_68060] = "mc68060",
62 [FPU_UNKNOWN] = "unknown"
63 };
64
65 void
initfpu(void)66 initfpu(void)
67 {
68 const char *descr;
69
70 fputype = fpu_probe();
71
72 /* Generate a reference FPU idle frame. */
73 if (fputype != FPU_NONE)
74 m68k_make_fpu_idle_frame();
75
76 if ((0 <= fputype) && (fputype <= 3))
77 descr = fpu_descr[fputype];
78 else
79 descr = "unknown type";
80
81 printf("fpu: %s\n", descr);
82 }
83