1 /* $NetBSD: vmparam.h,v 1.38 2002/04/01 13:28:10 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 41 */ 42 #ifndef _VMPARAM_H_ 43 #define _VMPARAM_H_ 44 45 /* 46 * Machine dependent constants for VAX. 47 */ 48 49 /* 50 * We use 4K VM pages on the VAX. Override the PAGE_* definitions 51 * to be compile-time constants. 52 */ 53 #define PAGE_SHIFT 12 54 #define PAGE_SIZE (1 << PAGE_SHIFT) 55 #define PAGE_MASK (PAGE_SIZE - 1) 56 57 /* 58 * USRTEXT is the start of the user text/data space, while USRSTACK 59 * is the top (end) of the user stack. Immediately above the user stack 60 * resides kernel. 61 * 62 */ 63 64 #define USRTEXT NBPG 65 #define USRSTACK KERNBASE 66 67 /* 68 * Virtual memory related constants, all in bytes 69 */ 70 71 #ifndef MAXTSIZ 72 #define MAXTSIZ (8*1024*1024) /* max text size */ 73 #endif 74 #ifndef DFLDSIZ 75 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 76 #endif 77 #ifndef MAXDSIZ 78 #define MAXDSIZ (64*1024*1024) /* max data size */ 79 #endif 80 #ifndef DFLSSIZ 81 #define DFLSSIZ (512*1024) /* initial stack size limit */ 82 #endif 83 #ifndef MAXSSIZ 84 #define MAXSSIZ (8*1024*1024) /* max stack size */ 85 #endif 86 87 /* 88 * All mmap()'ed data will be mapped above MAXDSIZ. This means that 89 * pte space must be allocated for (possible) mmap()'ed data. 90 * Note: This is just a hint, if we mmap() more than this the page 91 * table will be expanded. (at the cost of speed). 92 */ 93 #define MMAPSPACE (8*1024*1024) 94 95 /* 96 * Size of shared memory map 97 */ 98 99 #ifndef SHMMAXPGS 100 #define SHMMAXPGS 1024 101 #endif 102 103 #define VM_PHYSSEG_MAX 1 104 #define VM_PHYSSEG_NOADD 105 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH /* XXX */ 106 107 #define VM_NFREELIST 1 108 #define VM_FREELIST_DEFAULT 0 109 110 /* MD round macros */ 111 #define vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET) 112 #define vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET) 113 114 /* 115 * Mach derived constants 116 */ 117 118 /* user/kernel map constants */ 119 #define VM_MIN_ADDRESS ((vaddr_t)0) 120 #define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE) 121 #define VM_MAX_ADDRESS ((vaddr_t)KERNBASE) 122 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 123 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0xC0000000)) 124 125 #define USRIOSIZE (8 * VAX_NPTEPG) /* 512MB */ 126 #define VM_PHYS_SIZE (USRIOSIZE*VAX_NBPG) 127 128 #endif 129