vmparam.h revision 139790
166458Sdfr/* $FreeBSD: head/sys/ia64/include/vmparam.h 139790 2005-01-06 22:18:23Z imp $ */ 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/* 4766458Sdfr * USRTEXT is the start of the user text/data space, while USRSTACK 4866458Sdfr * is the top (end) of the user stack. Immediately above the user stack 49115084Smarcel * resides the syscall gateway page. 5066458Sdfr */ 5166458Sdfr#define USRTEXT CLBYTES 52115084Smarcel#define USRSTACK VM_MAX_ADDRESS 5366458Sdfr 5466458Sdfr/* 5566458Sdfr * Virtual memory related constants, all in bytes 5666458Sdfr */ 5766458Sdfr#ifndef MAXTSIZ 5866458Sdfr#define MAXTSIZ (1<<30) /* max text size (1G) */ 5966458Sdfr#endif 6066458Sdfr#ifndef DFLDSIZ 6166458Sdfr#define DFLDSIZ (1<<27) /* initial data size (128M) */ 6266458Sdfr#endif 6366458Sdfr#ifndef MAXDSIZ 6466458Sdfr#define MAXDSIZ (1<<30) /* max data size (1G) */ 6566458Sdfr#endif 6666458Sdfr#ifndef DFLSSIZ 6766458Sdfr#define DFLSSIZ (1<<21) /* initial stack size (2M) */ 6866458Sdfr#endif 6966458Sdfr#ifndef MAXSSIZ 7092670Speter#define MAXSSIZ (1<<28) /* max stack size (256M) */ 7166458Sdfr#endif 7266458Sdfr#ifndef SGROWSIZ 7366458Sdfr#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 7466458Sdfr#endif 7566458Sdfr 7666458Sdfr/* 7766458Sdfr * PTEs for mapping user space into the kernel for phyio operations. 7866458Sdfr * 64 pte's are enough to cover 8 disks * MAXBSIZE. 7966458Sdfr */ 8066458Sdfr#ifndef USRIOSIZE 8166458Sdfr#define USRIOSIZE 64 8266458Sdfr#endif 8366458Sdfr 8466458Sdfr/* 8566458Sdfr * Boundary at which to place first MAPMEM segment if not explicitly 8666458Sdfr * specified. Should be a power of two. This allows some slop for 8766458Sdfr * the data segment to grow underneath the first mapped segment. 8866458Sdfr */ 8966458Sdfr#define MMSEG 0x200000 9066458Sdfr 9166458Sdfr/* 9266458Sdfr * The size of the clock loop. 9366458Sdfr */ 9466458Sdfr#define LOOPPAGES (maxfree - firstfree) 9566458Sdfr 9666458Sdfr/* 9766458Sdfr * The time for a process to be blocked before being very swappable. 9866458Sdfr * This is a number of seconds which the system takes as being a non-trivial 9966458Sdfr * amount of real time. You probably shouldn't change this; 10066458Sdfr * it is used in subtle ways (fractions and multiples of it are, that is, like 10166458Sdfr * half of a ``long time'', almost a long time, etc.) 10266458Sdfr * It is related to human patience and other factors which don't really 10366458Sdfr * change over time. 10466458Sdfr */ 10566458Sdfr#define MAXSLP 20 10666458Sdfr 10766458Sdfr/* 10866458Sdfr * A swapped in process is given a small amount of core without being bothered 10966458Sdfr * by the page replacement algorithm. Basically this says that if you are 11066458Sdfr * swapped in you deserve some resources. We protect the last SAFERSS 11166458Sdfr * pages against paging and will just swap you out rather than paging you. 11266458Sdfr * Note that each process has at least UPAGES+CLSIZE pages which are not 11366458Sdfr * paged anyways, in addition to SAFERSS. 11466458Sdfr */ 11566458Sdfr#define SAFERSS 10 /* nominal ``small'' resident set size 11666458Sdfr protected against replacement */ 11766458Sdfr 11866458Sdfr/* 119106486Smarcel * We need region 7 virtual addresses for pagetables. 120106486Smarcel */ 121106486Smarcel#define UMA_MD_SMALL_ALLOC 122106486Smarcel 123106486Smarcel/* 12496912Smarcel * Manipulating region bits of an address. 12596912Smarcel */ 12696912Smarcel#define IA64_RR_BASE(n) (((u_int64_t) (n)) << 61) 12796912Smarcel#define IA64_RR_MASK(x) ((x) & ((1L << 61) - 1)) 12896912Smarcel 12996912Smarcel#define IA64_PHYS_TO_RR6(x) ((x) | IA64_RR_BASE(6)) 13096912Smarcel#define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) 13196912Smarcel 13296912Smarcel/* 133119906Smarcel * Page size of the identity mappings in region 7. 134119906Smarcel */ 135119906Smarcel#ifndef LOG2_ID_PAGE_SIZE 136119906Smarcel#define LOG2_ID_PAGE_SIZE 28 /* 256M */ 137119906Smarcel#endif 138119906Smarcel 139119906Smarcel#define IA64_ID_PAGE_SHIFT (LOG2_ID_PAGE_SIZE) 140119906Smarcel#define IA64_ID_PAGE_SIZE (1<<(LOG2_ID_PAGE_SIZE)) 141119906Smarcel#define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) 142119906Smarcel 143121268Smarcel#define IA64_BACKINGSTORE IA64_RR_BASE(4) 144121268Smarcel 145119906Smarcel/* 14666458Sdfr * Mach derived constants 14766458Sdfr */ 14866458Sdfr 14966458Sdfr/* user/kernel map constants */ 15066458Sdfr#define VM_MIN_ADDRESS 0 151115084Smarcel#define VM_MAX_ADDRESS IA64_RR_BASE(5) 152115084Smarcel#define VM_GATEWAY_SIZE PAGE_SIZE 153115084Smarcel#define VM_MAXUSER_ADDRESS (VM_MAX_ADDRESS + VM_GATEWAY_SIZE) 154115084Smarcel#define VM_MIN_KERNEL_ADDRESS VM_MAXUSER_ADDRESS 15566458Sdfr#define VM_MAX_KERNEL_ADDRESS (IA64_RR_BASE(6) - 1) 15666458Sdfr 157115084Smarcel#define KERNBASE VM_MAX_ADDRESS 15896912Smarcel 15966458Sdfr/* virtual sizes (bytes) for various kernel submaps */ 16066458Sdfr#ifndef VM_KMEM_SIZE 16166458Sdfr#define VM_KMEM_SIZE (12 * 1024 * 1024) 16266458Sdfr#endif 16366458Sdfr 16466458Sdfr/* 16566458Sdfr * How many physical pages per KVA page allocated. 16666458Sdfr * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 16766458Sdfr * is the total KVA space allocated for kmem_map. 16866458Sdfr */ 16966458Sdfr#ifndef VM_KMEM_SIZE_SCALE 17066458Sdfr#define VM_KMEM_SIZE_SCALE (4) /* XXX 8192 byte pages */ 17166458Sdfr#endif 17266458Sdfr 17366458Sdfr/* initial pagein size of beginning of executable file */ 17466458Sdfr#ifndef VM_INITIAL_PAGEIN 17566458Sdfr#define VM_INITIAL_PAGEIN 16 17666458Sdfr#endif 17766458Sdfr 17896912Smarcel#endif /* !_MACHINE_VMPARAM_H */ 179