1 /* $OpenBSD: vmparam.h,v 1.28 2003/06/02 23:27:47 millert 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 36 */ 37 38 #ifndef _MACHINE_VM_PARAM_H_ 39 #define _MACHINE_VM_PARAM_H_ 40 /* 41 * Machine dependent constants for 386. 42 */ 43 44 /* 45 * Virtual address space arrangement. On 386, both user and kernel 46 * share the address space, not unlike the vax. 47 * USRTEXT is the start of the user text/data space, while USRSTACK 48 * is the top (end) of the user stack. Immediately above the user stack 49 * resides the user structure, which is UPAGES long and contains the 50 * kernel stack. 51 * 52 * Immediately after the user structure is the page table map, and then 53 * kernal address space. 54 */ 55 #define USRTEXT PAGE_SIZE 56 #define USRSTACK VM_MAXUSER_ADDRESS 57 58 /* 59 * Virtual memory related constants, all in bytes 60 */ 61 #define MAXTSIZ (64*1024*1024) /* max text size */ 62 #ifndef DFLDSIZ 63 #define DFLDSIZ (64*1024*1024) /* initial data size limit */ 64 #endif 65 #ifndef MAXDSIZ 66 #define MAXDSIZ (1024*1024*1024) /* max data size */ 67 #endif 68 #ifndef DFLSSIZ 69 #define DFLSSIZ (4*1024*1024) /* initial stack size limit */ 70 #endif 71 #ifndef MAXSSIZ 72 #define MAXSSIZ (32*1024*1024) /* max stack size */ 73 #endif 74 75 /* I386 has a line where all code is executable: 0 - I386_MAX_EXE_ADDR */ 76 #define I386_MAX_EXE_ADDR 0x20000000 /* exec line */ 77 78 /* 79 * Size of shared memory map 80 */ 81 #ifndef SHMMAXPGS 82 #define SHMMAXPGS 2048 83 #endif 84 85 /* 86 * Size of User Raw I/O map 87 */ 88 #define USRIOSIZE 300 89 90 /* 91 * The time for a process to be blocked before being very swappable. 92 * This is a number of seconds which the system takes as being a non-trivial 93 * amount of real time. You probably shouldn't change this; 94 * it is used in subtle ways (fractions and multiples of it are, that is, like 95 * half of a ``long time'', almost a long time, etc.) 96 * It is related to human patience and other factors which don't really 97 * change over time. 98 */ 99 #define MAXSLP 20 100 101 /* XXX Compatibility */ 102 #define APTDPTDI PDSLOT_APTE 103 #define PTDPTDI PDSLOT_PTE 104 105 /* user/kernel map constants */ 106 #define VM_MIN_ADDRESS ((vaddr_t)0) 107 #define VM_MAXUSER_ADDRESS ((vaddr_t)((PTDPTDI<<PDSHIFT) - USPACE)) 108 #define VM_MAX_ADDRESS ((vaddr_t)((PTDPTDI<<PDSHIFT) + (PTDPTDI<<PGSHIFT))) 109 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 110 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(APTDPTDI<<PDSHIFT)) 111 112 /* virtual sizes (bytes) for various kernel submaps */ 113 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 114 115 #define VM_PHYSSEG_MAX 4 /* actually we could have this many segments */ 116 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 117 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 118 119 #define VM_NFREELIST 2 120 #define VM_FREELIST_DEFAULT 0 121 #define VM_FREELIST_FIRST16 1 122 123 /* 124 * pmap specific data stored in the vm_physmem[] array 125 */ 126 #define __HAVE_PMAP_PHYSSEG 127 struct pmap_physseg { 128 struct pv_head *pvhead; /* pv_head array */ 129 char *attrs; /* attrs array */ 130 }; 131 132 #endif /* _MACHINE_VM_PARAM_H_ */ 133