vmparam.h revision 172317
166458Sdfr/* $FreeBSD: head/sys/ia64/include/vmparam.h 172317 2007-09-25 06:25:06Z alc $ */ 266458Sdfr/* From: NetBSD: vmparam.h,v 1.6 1997/09/23 23:23:23 mjacob Exp */ 396912Smarcel#ifndef _MACHINE_VMPARAM_H 496912Smarcel#define _MACHINE_VMPARAM_H 5139790Simp/*- 666458Sdfr * Copyright (c) 1988 University of Utah. 766458Sdfr * Copyright (c) 1992, 1993 866458Sdfr * The Regents of the University of California. All rights reserved. 966458Sdfr * 1066458Sdfr * This code is derived from software contributed to Berkeley by 1166458Sdfr * the Systems Programming Group of the University of Utah Computer 1266458Sdfr * Science Department and Ralph Campbell. 1366458Sdfr * 1466458Sdfr * Redistribution and use in source and binary forms, with or without 1566458Sdfr * modification, are permitted provided that the following conditions 1666458Sdfr * are met: 1766458Sdfr * 1. Redistributions of source code must retain the above copyright 1866458Sdfr * notice, this list of conditions and the following disclaimer. 1966458Sdfr * 2. Redistributions in binary form must reproduce the above copyright 2066458Sdfr * notice, this list of conditions and the following disclaimer in the 2166458Sdfr * documentation and/or other materials provided with the distribution. 2266458Sdfr * 4. Neither the name of the University nor the names of its contributors 2366458Sdfr * may be used to endorse or promote products derived from this software 2466458Sdfr * without specific prior written permission. 2566458Sdfr * 2666458Sdfr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2766458Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2866458Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2966458Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3066458Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3166458Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3266458Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3366458Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3466458Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3566458Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3666458Sdfr * SUCH DAMAGE. 3766458Sdfr * 3866458Sdfr * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 3966458Sdfr * 4066458Sdfr * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 4166458Sdfr */ 4266458Sdfr 4366458Sdfr/* 4496912Smarcel * Machine dependent constants for ia64. 4566458Sdfr */ 4666458Sdfr/* 47170033Salc * USRSTACK is the top (end) of the user stack. Immediately above the user 48170033Salc * stack resides the syscall gateway page. 4966458Sdfr */ 50115084Smarcel#define USRSTACK VM_MAX_ADDRESS 5166458Sdfr 5266458Sdfr/* 5366458Sdfr * Virtual memory related constants, all in bytes 5466458Sdfr */ 5566458Sdfr#ifndef MAXTSIZ 5666458Sdfr#define MAXTSIZ (1<<30) /* max text size (1G) */ 5766458Sdfr#endif 5866458Sdfr#ifndef DFLDSIZ 5966458Sdfr#define DFLDSIZ (1<<27) /* initial data size (128M) */ 6066458Sdfr#endif 6166458Sdfr#ifndef MAXDSIZ 6266458Sdfr#define MAXDSIZ (1<<30) /* max data size (1G) */ 6366458Sdfr#endif 6466458Sdfr#ifndef DFLSSIZ 6566458Sdfr#define DFLSSIZ (1<<21) /* initial stack size (2M) */ 6666458Sdfr#endif 6766458Sdfr#ifndef MAXSSIZ 6892670Speter#define MAXSSIZ (1<<28) /* max stack size (256M) */ 6966458Sdfr#endif 7066458Sdfr#ifndef SGROWSIZ 7166458Sdfr#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 7266458Sdfr#endif 7366458Sdfr 7466458Sdfr/* 7566458Sdfr * Boundary at which to place first MAPMEM segment if not explicitly 7666458Sdfr * specified. Should be a power of two. This allows some slop for 7766458Sdfr * the data segment to grow underneath the first mapped segment. 7866458Sdfr */ 7966458Sdfr#define MMSEG 0x200000 8066458Sdfr 8166458Sdfr/* 8266458Sdfr * The size of the clock loop. 8366458Sdfr */ 8466458Sdfr#define LOOPPAGES (maxfree - firstfree) 8566458Sdfr 8666458Sdfr/* 8766458Sdfr * The time for a process to be blocked before being very swappable. 8866458Sdfr * This is a number of seconds which the system takes as being a non-trivial 8966458Sdfr * amount of real time. You probably shouldn't change this; 9066458Sdfr * it is used in subtle ways (fractions and multiples of it are, that is, like 9166458Sdfr * half of a ``long time'', almost a long time, etc.) 9266458Sdfr * It is related to human patience and other factors which don't really 9366458Sdfr * change over time. 9466458Sdfr */ 9566458Sdfr#define MAXSLP 20 9666458Sdfr 9766458Sdfr/* 9866458Sdfr * A swapped in process is given a small amount of core without being bothered 9966458Sdfr * by the page replacement algorithm. Basically this says that if you are 10066458Sdfr * swapped in you deserve some resources. We protect the last SAFERSS 10166458Sdfr * pages against paging and will just swap you out rather than paging you. 102150008Salc * Note that each process has at least UPAGES pages which are not 10366458Sdfr * paged anyways, in addition to SAFERSS. 10466458Sdfr */ 10566458Sdfr#define SAFERSS 10 /* nominal ``small'' resident set size 10666458Sdfr protected against replacement */ 10766458Sdfr 10866458Sdfr/* 109106486Smarcel * We need region 7 virtual addresses for pagetables. 110106486Smarcel */ 111106486Smarcel#define UMA_MD_SMALL_ALLOC 112106486Smarcel 113106486Smarcel/* 114169291Salc * The physical address space is sparsely populated. 115169291Salc */ 116169291Salc#define VM_PHYSSEG_SPARSE 117169291Salc 118169291Salc/* 119170519Salc * The number of PHYSSEG entries is equal to the number of phys_avail 120170519Salc * entries. 121170519Salc */ 122170519Salc#define VM_PHYSSEG_MAX 49 123170519Salc 124170519Salc/* 125172317Salc * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 126170519Salc * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 127170519Salc * the pool from which physical pages for small UMA objects are 128170519Salc * allocated. 129170519Salc */ 130172317Salc#define VM_NFREEPOOL 3 131172317Salc#define VM_FREEPOOL_CACHE 2 132170519Salc#define VM_FREEPOOL_DEFAULT 0 133170519Salc#define VM_FREEPOOL_DIRECT 1 134170519Salc 135170519Salc/* 136170519Salc * Create one free page list. 137170519Salc */ 138170519Salc#define VM_NFREELIST 1 139170519Salc#define VM_FREELIST_DEFAULT 0 140170519Salc 141170519Salc/* 142170519Salc * An allocation size of 256MB is supported in order to optimize the 143170519Salc * use of the identity mappings in region 7 by UMA. 144170519Salc */ 145170519Salc#define VM_NFREEORDER 16 146170519Salc 147170519Salc/* 14896912Smarcel * Manipulating region bits of an address. 14996912Smarcel */ 15096912Smarcel#define IA64_RR_BASE(n) (((u_int64_t) (n)) << 61) 15196912Smarcel#define IA64_RR_MASK(x) ((x) & ((1L << 61) - 1)) 15296912Smarcel 15396912Smarcel#define IA64_PHYS_TO_RR6(x) ((x) | IA64_RR_BASE(6)) 15496912Smarcel#define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) 15596912Smarcel 15696912Smarcel/* 157119906Smarcel * Page size of the identity mappings in region 7. 158119906Smarcel */ 159119906Smarcel#ifndef LOG2_ID_PAGE_SIZE 160119906Smarcel#define LOG2_ID_PAGE_SIZE 28 /* 256M */ 161119906Smarcel#endif 162119906Smarcel 163119906Smarcel#define IA64_ID_PAGE_SHIFT (LOG2_ID_PAGE_SIZE) 164119906Smarcel#define IA64_ID_PAGE_SIZE (1<<(LOG2_ID_PAGE_SIZE)) 165119906Smarcel#define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) 166119906Smarcel 167121268Smarcel#define IA64_BACKINGSTORE IA64_RR_BASE(4) 168121268Smarcel 169119906Smarcel/* 17066458Sdfr * Mach derived constants 17166458Sdfr */ 17266458Sdfr 17366458Sdfr/* user/kernel map constants */ 17466458Sdfr#define VM_MIN_ADDRESS 0 175115084Smarcel#define VM_MAX_ADDRESS IA64_RR_BASE(5) 176115084Smarcel#define VM_GATEWAY_SIZE PAGE_SIZE 177115084Smarcel#define VM_MAXUSER_ADDRESS (VM_MAX_ADDRESS + VM_GATEWAY_SIZE) 178115084Smarcel#define VM_MIN_KERNEL_ADDRESS VM_MAXUSER_ADDRESS 17966458Sdfr#define VM_MAX_KERNEL_ADDRESS (IA64_RR_BASE(6) - 1) 18066458Sdfr 181115084Smarcel#define KERNBASE VM_MAX_ADDRESS 18296912Smarcel 18366458Sdfr/* virtual sizes (bytes) for various kernel submaps */ 18466458Sdfr#ifndef VM_KMEM_SIZE 18566458Sdfr#define VM_KMEM_SIZE (12 * 1024 * 1024) 18666458Sdfr#endif 18766458Sdfr 18866458Sdfr/* 18966458Sdfr * How many physical pages per KVA page allocated. 190168920Ssepotvin * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), 191168920Ssepotvin * VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX) 19266458Sdfr * is the total KVA space allocated for kmem_map. 19366458Sdfr */ 19466458Sdfr#ifndef VM_KMEM_SIZE_SCALE 19566458Sdfr#define VM_KMEM_SIZE_SCALE (4) /* XXX 8192 byte pages */ 19666458Sdfr#endif 19766458Sdfr 19866458Sdfr/* initial pagein size of beginning of executable file */ 19966458Sdfr#ifndef VM_INITIAL_PAGEIN 20066458Sdfr#define VM_INITIAL_PAGEIN 16 20166458Sdfr#endif 20266458Sdfr 20396912Smarcel#endif /* !_MACHINE_VMPARAM_H */ 204