vmparam.h revision 139790
1/* $FreeBSD: head/sys/ia64/include/vmparam.h 139790 2005-01-06 22:18:23Z imp $ */ 2/* From: NetBSD: vmparam.h,v 1.6 1997/09/23 23:23:23 mjacob Exp */ 3#ifndef _MACHINE_VMPARAM_H 4#define _MACHINE_VMPARAM_H 5/*- 6 * Copyright (c) 1988 University of Utah. 7 * Copyright (c) 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * the Systems Programming Group of the University of Utah Computer 12 * Science Department and Ralph Campbell. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 39 * 40 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 41 */ 42 43/* 44 * Machine dependent constants for ia64. 45 */ 46/* 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 syscall gateway page. 50 */ 51#define USRTEXT CLBYTES 52#define USRSTACK VM_MAX_ADDRESS 53 54/* 55 * Virtual memory related constants, all in bytes 56 */ 57#ifndef MAXTSIZ 58#define MAXTSIZ (1<<30) /* max text size (1G) */ 59#endif 60#ifndef DFLDSIZ 61#define DFLDSIZ (1<<27) /* initial data size (128M) */ 62#endif 63#ifndef MAXDSIZ 64#define MAXDSIZ (1<<30) /* max data size (1G) */ 65#endif 66#ifndef DFLSSIZ 67#define DFLSSIZ (1<<21) /* initial stack size (2M) */ 68#endif 69#ifndef MAXSSIZ 70#define MAXSSIZ (1<<28) /* max stack size (256M) */ 71#endif 72#ifndef SGROWSIZ 73#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 74#endif 75 76/* 77 * PTEs for mapping user space into the kernel for phyio operations. 78 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 79 */ 80#ifndef USRIOSIZE 81#define USRIOSIZE 64 82#endif 83 84/* 85 * Boundary at which to place first MAPMEM segment if not explicitly 86 * specified. Should be a power of two. This allows some slop for 87 * the data segment to grow underneath the first mapped segment. 88 */ 89#define MMSEG 0x200000 90 91/* 92 * The size of the clock loop. 93 */ 94#define LOOPPAGES (maxfree - firstfree) 95 96/* 97 * The time for a process to be blocked before being very swappable. 98 * This is a number of seconds which the system takes as being a non-trivial 99 * amount of real time. You probably shouldn't change this; 100 * it is used in subtle ways (fractions and multiples of it are, that is, like 101 * half of a ``long time'', almost a long time, etc.) 102 * It is related to human patience and other factors which don't really 103 * change over time. 104 */ 105#define MAXSLP 20 106 107/* 108 * A swapped in process is given a small amount of core without being bothered 109 * by the page replacement algorithm. Basically this says that if you are 110 * swapped in you deserve some resources. We protect the last SAFERSS 111 * pages against paging and will just swap you out rather than paging you. 112 * Note that each process has at least UPAGES+CLSIZE pages which are not 113 * paged anyways, in addition to SAFERSS. 114 */ 115#define SAFERSS 10 /* nominal ``small'' resident set size 116 protected against replacement */ 117 118/* 119 * We need region 7 virtual addresses for pagetables. 120 */ 121#define UMA_MD_SMALL_ALLOC 122 123/* 124 * Manipulating region bits of an address. 125 */ 126#define IA64_RR_BASE(n) (((u_int64_t) (n)) << 61) 127#define IA64_RR_MASK(x) ((x) & ((1L << 61) - 1)) 128 129#define IA64_PHYS_TO_RR6(x) ((x) | IA64_RR_BASE(6)) 130#define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) 131 132/* 133 * Page size of the identity mappings in region 7. 134 */ 135#ifndef LOG2_ID_PAGE_SIZE 136#define LOG2_ID_PAGE_SIZE 28 /* 256M */ 137#endif 138 139#define IA64_ID_PAGE_SHIFT (LOG2_ID_PAGE_SIZE) 140#define IA64_ID_PAGE_SIZE (1<<(LOG2_ID_PAGE_SIZE)) 141#define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) 142 143#define IA64_BACKINGSTORE IA64_RR_BASE(4) 144 145/* 146 * Mach derived constants 147 */ 148 149/* user/kernel map constants */ 150#define VM_MIN_ADDRESS 0 151#define VM_MAX_ADDRESS IA64_RR_BASE(5) 152#define VM_GATEWAY_SIZE PAGE_SIZE 153#define VM_MAXUSER_ADDRESS (VM_MAX_ADDRESS + VM_GATEWAY_SIZE) 154#define VM_MIN_KERNEL_ADDRESS VM_MAXUSER_ADDRESS 155#define VM_MAX_KERNEL_ADDRESS (IA64_RR_BASE(6) - 1) 156 157#define KERNBASE VM_MAX_ADDRESS 158 159/* virtual sizes (bytes) for various kernel submaps */ 160#ifndef VM_KMEM_SIZE 161#define VM_KMEM_SIZE (12 * 1024 * 1024) 162#endif 163 164/* 165 * How many physical pages per KVA page allocated. 166 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 167 * is the total KVA space allocated for kmem_map. 168 */ 169#ifndef VM_KMEM_SIZE_SCALE 170#define VM_KMEM_SIZE_SCALE (4) /* XXX 8192 byte pages */ 171#endif 172 173/* initial pagein size of beginning of executable file */ 174#ifndef VM_INITIAL_PAGEIN 175#define VM_INITIAL_PAGEIN 16 176#endif 177 178#endif /* !_MACHINE_VMPARAM_H */ 179