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      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
     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
     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