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vmparam.h revision 1.51 
      1 /*	$NetBSD: vmparam.h,v 1.51 2018/03/31 06:34:51 ragge Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Slightly modified for the VAX port /IC
     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  *	@(#)vmparam.h	5.9 (Berkeley) 5/12/91
     37  */
     38 #ifndef _VMPARAM_H_
     39 #define _VMPARAM_H_
     40 
     41 /*
     42  * Machine dependent constants for VAX.
     43  */
     44 
     45 /*
     46  * We use 4K VM pages on the VAX.  Override the PAGE_* definitions
     47  * to be compile-time constants.
     48  */
     49 #define	PAGE_SHIFT	12
     50 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     51 #define	PAGE_MASK	(PAGE_SIZE - 1)
     52 
     53 /*
     54  * USRSTACK is the top (end) of the user stack. Immediately above the
     55  * user stack resides kernel.
     56  */
     57 
     58 #define USRSTACK	KERNBASE
     59 
     60 /*
     61  * Virtual memory related constants, all in bytes
     62  */
     63 
     64 #ifndef MAXTSIZ
     65 #define MAXTSIZ		(32*1024*1024)		/* max text size */
     66 #endif
     67 #ifndef DFLDSIZ
     68 #define DFLDSIZ		(128*1024*1024)		/* initial data size limit */
     69 #endif
     70 #ifndef MAXDSIZ
     71 #define MAXDSIZ		(512*1024*1024)		/* max data size */
     72 #endif
     73 #ifndef DFLSSIZ
     74 #define DFLSSIZ		(512*1024)		/* initial stack size limit */
     75 #endif
     76 #ifndef MAXSSIZ
     77 #define MAXSSIZ		(8*1024*1024)		/* max stack size */
     78 #endif
     79 
     80 #define VM_PHYSSEG_MAX		1
     81 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH /* XXX */
     82 
     83 #define	VM_NFREELIST		1
     84 #define	VM_FREELIST_DEFAULT	0
     85 
     86 /* MD round macros */
     87 #define	vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET)
     88 #define	vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET)
     89 
     90 /*
     91  * Mach derived constants
     92  */
     93 
     94 /* user/kernel map constants */
     95 #define VM_MIN_ADDRESS		((vaddr_t)0)
     96 #define VM_MAXUSER_ADDRESS	((vaddr_t)KERNBASE)
     97 #define VM_MAX_ADDRESS		((vaddr_t)KERNBASE)
     98 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
     99 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0xC0000000))
    100 
    101 #define __USE_TOPDOWN_VM
    102 
    103 #define	USRIOSIZE		(8 * VAX_NPTEPG)	/* 512MB */
    104 #define	VM_PHYS_SIZE		(USRIOSIZE*VAX_NBPG)
    105 
    106 #endif
    107