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      1 /*	$NetBSD: vmparam.h,v 1.38 2020/02/01 19:41:50 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _SUN3_VMPARAM_H_
     30 #define _SUN3_VMPARAM_H_ 1
     31 
     32 #define __USE_TOPDOWN_VM
     33 
     34 /*
     35  * Use common m68k definitions to define PAGE_SIZE and related constants.
     36  */
     37 #include <m68k/vmparam.h>
     38 
     39 #define	USRSTACK	kernbase	/* for modules */
     40 #define	USRSTACK3	KERNBASE3	/* for asm not in modules */
     41 #define	USRSTACK3X	KERNBASE3X
     42 
     43 #ifdef	_SUN3_
     44 #include <machine/vmparam3.h>
     45 #endif	/* SUN3 */
     46 #ifdef	_SUN3X_
     47 #include <machine/vmparam3x.h>
     48 #endif	/* SUN3X */
     49 
     50 /* default for modules etc. */
     51 #if !defined(_SUN3_) && !defined(_SUN3X_)
     52 #include <machine/vmparam3.h>
     53 #endif
     54 
     55 /*
     56  * PTEs for mapping user space into the kernel for phyio operations.
     57  * The actual limitation for physio requests will be the DVMA space,
     58  * and that is fixed by hardware design at 1MB.  We could make the
     59  * physio map larger than that, but it would not buy us much.
     60  */
     61 #ifndef USRIOSIZE
     62 #define USRIOSIZE	128		/* 1 MB */
     63 #endif
     64 
     65 /* This is needed by some LKMs. */
     66 #define VM_PHYSSEG_MAX		4
     67 
     68 /*
     69  * Mach-derived constants:
     70  */
     71 
     72 /* user/kernel map constants */
     73 #define VM_MIN_ADDRESS		((vaddr_t)0)
     74 #define VM_MAX_ADDRESS		kernbase
     75 #define VM_MAXUSER_ADDRESS	kernbase
     76 #define VM_MIN_KERNEL_ADDRESS	kernbase
     77 #define VM_MAX_KERNEL_ADDRESS	kern_end
     78 
     79 /* virtual sizes (bytes) for various kernel submaps */
     80 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
     81 
     82 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
     83 
     84 #define	VM_NFREELIST		1
     85 #define	VM_FREELIST_DEFAULT	0
     86 
     87 #endif	/* _SUN3_VMPARAM_H_ */
     88