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vmparam.h revision 1.33.20.3 
      1 /*	$NetBSD: vmparam.h,v 1.33.20.3 2010/10/22 07:21:36 uebayasi 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 /*
     33  * We use 8K pages on both the sun3 and sun3x.  Override PAGE_*
     34  * to be compile-time constants.
     35  */
     36 #define	PAGE_SHIFT	13
     37 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     38 #define	PAGE_MASK	(PAGE_SIZE - 1)
     39 
     40 #define	USRSTACK	kernbase	/* for modules */
     41 #define	USRSTACK3	KERNBASE3	/* for asm not in modules */
     42 #define	USRSTACK3X	KERNBASE3X
     43 
     44 #ifdef	_SUN3_
     45 #include <machine/vmparam3.h>
     46 #endif	/* SUN3 */
     47 #ifdef	_SUN3X_
     48 #include <machine/vmparam3x.h>
     49 #endif	/* SUN3X */
     50 
     51 /* default for modules etc. */
     52 #if !defined(_SUN3_) && !defined(_SUN3X_)
     53 #include <machine/vmparam3.h>
     54 #endif
     55 
     56 /*
     57  * PTEs for mapping user space into the kernel for phyio operations.
     58  * The actual limitation for physio requests will be the DVMA space,
     59  * and that is fixed by hardware design at 1MB.  We could make the
     60  * physio map larger than that, but it would not buy us much.
     61  */
     62 #ifndef USRIOSIZE
     63 #define USRIOSIZE	128		/* 1 MB */
     64 #endif
     65 
     66 /* This is needed by some LKMs. */
     67 #define VM_PHYSSEG_MAX		4
     68 
     69 /*
     70  * Mach-derived constants:
     71  */
     72 
     73 /* user/kernel map constants */
     74 #define VM_MIN_ADDRESS		((vaddr_t)0)
     75 #define VM_MAX_ADDRESS		kernbase
     76 #define VM_MAXUSER_ADDRESS	kernbase
     77 #define VM_MIN_KERNEL_ADDRESS	kernbase
     78 #define VM_MAX_KERNEL_ADDRESS	kern_end
     79 
     80 /* virtual sizes (bytes) for various kernel submaps */
     81 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
     82 
     83 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
     84 
     85 #define	VM_NFREELIST		1
     86 #define	VM_FREELIST_DEFAULT	0
     87 
     88 #endif	/* _SUN3_VMPARAM_H_ */
     89