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