1 /* $NetBSD: fcode.h,v 1.2 2024/01/13 00:44:42 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: cpu.h 1.16 91/03/25$
37 *
38 * @(#)cpu.h 8.4 (Berkeley) 1/5/94
39 */
40
41 #ifndef _M68K_FCODE_H_
42 #define _M68K_FCODE_H_
43
44 /*
45 * 680x0 Function Codes.
46 *
47 * Section 4.2 of the 68030 User's Manual describes the address spaces
48 * selected by the Function Code:
49 *
50 * FC2 FC1 FC0 Address space
51 * -----------------------------------------------------------
52 * 0 0 0 (Undefined, reserved for Motorola)
53 * 0 0 1 User Data space
54 * 0 1 0 User Program space
55 * 0 1 1 (Undefined, reserved for user)
56 * 1 0 0 (Undefined, reserved for Motorola)
57 * 1 0 1 Supervisor Data space
58 * 1 1 0 Supervisor Program space
59 * 1 1 1 CPU space
60 */
61 #define FC_UNDEF0 0
62 #define FC_USERD 1 /* user data space */
63 #define FC_USERP 2 /* user program space */
64 #define FC_UNDEF3 3
65 #define FC_UNDEF4 4
66 #define FC_SUPERD 5 /* supervisor data space */
67 #define FC_SUPERP 6 /* supervisor program space */
68 #define FC_CPU 7 /* CPU space */
69
70 #ifdef _KERNEL
71
72 static inline int
getdfc(void)73 getdfc(void)
74 {
75 int rv;
76
77 __asm volatile("movc %%dfc,%0" : "=d" (rv));
78
79 return rv;
80 }
81
82 static inline int
getsfc(void)83 getsfc(void)
84 {
85 int rv;
86
87 __asm volatile("movc %%sfc,%0" : "=d" (rv));
88
89 return rv;
90 }
91
92 #endif /* _KERNEL */
93
94 #endif /* _M68K_FCODE_H_ */
95