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vmparam.h revision 1.1 
      1 /*	$NetBSD: vmparam.h,v 1.1 2020/02/01 19:41:48 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1986, 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 $Hdr: vmparam.h 1.16 91/01/18$
     37  *
     38  *	@(#)vmparam.h	8.2 (Berkeley) 4/19/94
     39  */
     40 
     41 #ifndef _M68K_VMPARAM_H_
     42 #define	_M68K_VMPARAM_H_
     43 
     44 /*
     45  * Common constants for m68k ports
     46  */
     47 
     48 /*
     49  * hp300 pmap derived m68k ports can use 4K or 8K pages.
     50  * (except HPMMU machines, that support only 4K page)
     51  * sun3 and sun3x use 8K pages.
     52  * The page size is specified by PGSHIFT in <machine/param.h>.
     53  * Override the PAGE_* definitions to be compile-time constants.
     54  */
     55 #define	PAGE_SHIFT	PGSHIFT
     56 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     57 #define	PAGE_MASK	(PAGE_SIZE - 1)
     58 
     59 /* Some implemantations like jemalloc(3) require physical page size details. */
     60 /*
     61  * XXX:
     62  * <uvm/uvm_param.h> assumes PAGE_SIZE is not a constant macro
     63  * but a variable (*uvmexp_pagesize) on MODULE builds in case of
     64  * (MIN_PAGE_SIZE != MAX_PAGE_SIZE).  For now we define these macros
     65  * for m68k ports only on !_KERNEL (currently just for jemalloc) builds.
     66  */
     67 #if !defined(_KERNEL)
     68 #define	MIN_PAGE_SHIFT	12
     69 #define	MAX_PAGE_SHIFT	13
     70 #define	MIN_PAGE_SIZE	(1 << MIN_PAGE_SHIFT)
     71 #define	MAX_PAGE_SIZE	(1 << MAX_PAGE_SHIFT)
     72 #endif /* !_KERNEL */
     73 
     74 #endif /* _M68K_VMPARAM_H_ */
     75