1 /* $OpenBSD: vmparam.h,v 1.23 2001/12/05 16:25:44 art Exp $ */ 2 /* $NetBSD: vmparam.h,v 1.15 1994/10/27 04:16:34 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 40 */ 41 42 #ifndef _MACHINE_VM_PARAM_H_ 43 #define _MACHINE_VM_PARAM_H_ 44 /* 45 * Machine dependent constants for 386. 46 */ 47 48 /* 49 * Virtual address space arrangement. On 386, both user and kernel 50 * share the address space, not unlike the vax. 51 * USRTEXT is the start of the user text/data space, while USRSTACK 52 * is the top (end) of the user stack. Immediately above the user stack 53 * resides the user structure, which is UPAGES long and contains the 54 * kernel stack. 55 * 56 * Immediately after the user structure is the page table map, and then 57 * kernal address space. 58 */ 59 #define USRTEXT PAGE_SIZE 60 #define USRSTACK VM_MAXUSER_ADDRESS 61 62 /* 63 * Virtual memory related constants, all in bytes 64 */ 65 #define MAXTSIZ (64*1024*1024) /* max text size */ 66 #ifndef DFLDSIZ 67 #define DFLDSIZ (64*1024*1024) /* initial data size limit */ 68 #endif 69 #ifndef MAXDSIZ 70 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 71 #endif 72 #ifndef DFLSSIZ 73 #define DFLSSIZ (4*1024*1024) /* initial stack size limit */ 74 #endif 75 #ifndef MAXSSIZ 76 #define MAXSSIZ (32*1024*1024) /* max stack size */ 77 #endif 78 79 /* 80 * Size of shared memory map 81 */ 82 #ifndef SHMMAXPGS 83 #define SHMMAXPGS 2048 84 #endif 85 86 /* 87 * Size of User Raw I/O map 88 */ 89 #define USRIOSIZE 300 90 91 /* 92 * The time for a process to be blocked before being very swappable. 93 * This is a number of seconds which the system takes as being a non-trivial 94 * amount of real time. You probably shouldn't change this; 95 * it is used in subtle ways (fractions and multiples of it are, that is, like 96 * half of a ``long time'', almost a long time, etc.) 97 * It is related to human patience and other factors which don't really 98 * change over time. 99 */ 100 #define MAXSLP 20 101 102 /* XXX Compatibility */ 103 #define APTDPTDI PDSLOT_APTE 104 #define PTDPTDI PDSLOT_PTE 105 106 /* user/kernel map constants */ 107 #define VM_MIN_ADDRESS ((vm_offset_t)0) 108 #define VM_MAXUSER_ADDRESS ((vm_offset_t)((PTDPTDI<<PDSHIFT) - USPACE)) 109 #define VM_MAX_ADDRESS ((vm_offset_t)((PTDPTDI<<PDSHIFT) + (PTDPTDI<<PGSHIFT))) 110 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNBASE) 111 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)(APTDPTDI<<PDSHIFT)) 112 113 /* virtual sizes (bytes) for various kernel submaps */ 114 #define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES) 115 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 116 117 #define VM_PHYSSEG_MAX 4 /* actually we could have this many segments */ 118 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 119 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 120 121 #define VM_NFREELIST 2 122 #define VM_FREELIST_DEFAULT 0 123 #define VM_FREELIST_FIRST16 1 124 125 /* 126 * pmap specific data stored in the vm_physmem[] array 127 */ 128 #define __HAVE_PMAP_PHYSSEG 129 struct pmap_physseg { 130 struct pv_head *pvhead; /* pv_head array */ 131 char *attrs; /* attrs array */ 132 }; 133 134 #endif /* _MACHINE_VM_PARAM_H_ */ 135