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m68k.h revision 1.26 
      1 /*	$NetBSD: m68k.h,v 1.26 2023/09/26 14:33:55 tsutsui 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  *	from: @(#)cpu.h	8.4 (Berkeley) 1/5/94
     38  */
     39 
     40 #ifndef _M68K_M68K_H_
     41 #define	_M68K_M68K_H_
     42 
     43 /*
     44  * Declarations for things exported by sources in this directory,
     45  * or required by sources in here and not declared elsewhere.
     46  *
     47  * These declarations generally do NOT belong in <machine/cpu.h>,
     48  * because that defines the interface between the common code and
     49  * the machine-dependent code, whereas this defines the interface
     50  * between the shared m68k code and the machine-dependent code.
     51  *
     52  * The MMU stuff is exported separately so it can be used just
     53  * where it is really needed.  Same for function codes, etc.
     54  */
     55 
     56 #ifdef _KERNEL
     57 /*
     58  * All m68k ports must provide these globals.
     59  */
     60 extern	int cputype;		/* CPU on this host */
     61 extern	int ectype;		/* external cache on this host */
     62 extern	int fputype;		/* FPU on this host */
     63 extern	int mmutype;		/* MMU on this host */
     64 #endif	/* _KERNEL */
     65 
     66 /* values for cputype */
     67 #define	CPU_68010	-1	/* 68010 */
     68 #define	CPU_68020	0	/* 68020 */
     69 #define	CPU_68030	1	/* 68030 */
     70 #define	CPU_68040	2	/* 68040 */
     71 #define	CPU_68060	3	/* 68060 */
     72 
     73 /* values for ectype */
     74 #define	EC_PHYS		-1	/* external physical address cache */
     75 #define	EC_NONE		0	/* no external cache */
     76 #define	EC_VIRT		1	/* external virtual address cache */
     77 
     78 /* values for fputype */
     79 #define	FPU_NONE	0	/* no FPU */
     80 #define	FPU_68881	1	/* 68881 FPU */
     81 #define	FPU_68882	2	/* 68882 FPU */
     82 #define	FPU_68040	3	/* 68040 on-chip FPU */
     83 #define	FPU_68060	4	/* 68060 on-chip FPU */
     84 #define	FPU_UNKNOWN	5	/* placeholder; unknown FPU */
     85 
     86 /* values for mmutype (assigned for quick testing) */
     87 #define	MMU_68060	-3	/* 68060 on-chip MMU */
     88 #define	MMU_68040	-2	/* 68040 on-chip MMU */
     89 #define	MMU_68030	-1	/* 68030 on-chip subset of 68851 */
     90 #define	MMU_HP		0	/* HP proprietary */
     91 #define	MMU_68851	1	/* Motorola 68851 */
     92 #define	MMU_SUN		2	/* Sun MMU */
     93 
     94 
     95 #ifdef _KERNEL
     96 
     97 struct pcb;
     98 struct trapframe;
     99 struct fpframe;
    100 
    101 /* copypage.s */
    102 void	copypage040(void *fromaddr, void *toaddr);
    103 void	copypage(void *fromaddr, void *toaddr);
    104 void	zeropage(void *addr);
    105 
    106 /* support.s */
    107 int	getdfc(void);
    108 int	getsfc(void);
    109 
    110 /* switch_subr.s */
    111 void	lwp_trampoline(void);
    112 void	m68881_save(struct fpframe *);
    113 void	m68881_restore(struct fpframe *);
    114 void	savectx(struct pcb *);
    115 
    116 /* w16copy.s */
    117 void	w16zero(void *, u_int);
    118 void	w16copy(const void *, void *, u_int);
    119 
    120 /* fpu.c */
    121 int	fpu_probe(void);
    122 
    123 /* regdump.c */
    124 void	regdump(struct trapframe *, int);
    125 
    126 /* sys_machdep.c */
    127 int	cachectl1(u_long, vaddr_t, size_t, struct proc *);
    128 int	dma_cachectl(void *, int);
    129 
    130 /* vm_machdep.c */
    131 int	kvtop(void *);
    132 void	physaccess(void *, void *, int, int);
    133 void	physunaccess(void *, int);
    134 
    135 #endif /* _KERNEL */
    136 #endif /* _M68K_M68K_H_ */
    137