vmparam.h revision 172317
1193323Sed/* $FreeBSD: head/sys/ia64/include/vmparam.h 172317 2007-09-25 06:25:06Z alc $ */ 2193323Sed/* From: NetBSD: vmparam.h,v 1.6 1997/09/23 23:23:23 mjacob Exp */ 3193323Sed#ifndef _MACHINE_VMPARAM_H 4193323Sed#define _MACHINE_VMPARAM_H 5193323Sed/*- 6193323Sed * Copyright (c) 1988 University of Utah. 7193323Sed * Copyright (c) 1992, 1993 8193323Sed * The Regents of the University of California. All rights reserved. 9193323Sed * 10193323Sed * This code is derived from software contributed to Berkeley by 11193323Sed * the Systems Programming Group of the University of Utah Computer 12193323Sed * Science Department and Ralph Campbell. 13193323Sed * 14193323Sed * Redistribution and use in source and binary forms, with or without 15193323Sed * modification, are permitted provided that the following conditions 16193323Sed * are met: 17193323Sed * 1. Redistributions of source code must retain the above copyright 18205407Srdivacky * notice, this list of conditions and the following disclaimer. 19198090Srdivacky * 2. Redistributions in binary form must reproduce the above copyright 20193323Sed * notice, this list of conditions and the following disclaimer in the 21218893Sdim * documentation and/or other materials provided with the distribution. 22193323Sed * 4. Neither the name of the University nor the names of its contributors 23193323Sed * may be used to endorse or promote products derived from this software 24193323Sed * without specific prior written permission. 25193323Sed * 26193323Sed * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27212904Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28212904Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29212904Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30212904Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31212904Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32212904Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33212904Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34212904Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35212904Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36212904Sdim * SUCH DAMAGE. 37212904Sdim * 38212904Sdim * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 39212904Sdim * 40212904Sdim * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 41212904Sdim */ 42212904Sdim 43212904Sdim/* 44212904Sdim * Machine dependent constants for ia64. 45212904Sdim */ 46212904Sdim/* 47212904Sdim * USRSTACK is the top (end) of the user stack. Immediately above the user 48212904Sdim * stack resides the syscall gateway page. 49212904Sdim */ 50212904Sdim#define USRSTACK VM_MAX_ADDRESS 51212904Sdim 52212904Sdim/* 53212904Sdim * Virtual memory related constants, all in bytes 54212904Sdim */ 55212904Sdim#ifndef MAXTSIZ 56212904Sdim#define MAXTSIZ (1<<30) /* max text size (1G) */ 57212904Sdim#endif 58193323Sed#ifndef DFLDSIZ 59193323Sed#define DFLDSIZ (1<<27) /* initial data size (128M) */ 60193323Sed#endif 61193323Sed#ifndef MAXDSIZ 62193323Sed#define MAXDSIZ (1<<30) /* max data size (1G) */ 63193323Sed#endif 64193323Sed#ifndef DFLSSIZ 65193323Sed#define DFLSSIZ (1<<21) /* initial stack size (2M) */ 66193323Sed#endif 67226633Sdim#ifndef MAXSSIZ 68226633Sdim#define MAXSSIZ (1<<28) /* max stack size (256M) */ 69193323Sed#endif 70193323Sed#ifndef SGROWSIZ 71193323Sed#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 72193323Sed#endif 73193323Sed 74193323Sed/* 75193323Sed * Boundary at which to place first MAPMEM segment if not explicitly 76193323Sed * specified. Should be a power of two. This allows some slop for 77193323Sed * the data segment to grow underneath the first mapped segment. 78193323Sed */ 79193323Sed#define MMSEG 0x200000 80193323Sed 81193323Sed/* 82193323Sed * The size of the clock loop. 83193323Sed */ 84193323Sed#define LOOPPAGES (maxfree - firstfree) 85198090Srdivacky 86193323Sed/* 87193323Sed * The time for a process to be blocked before being very swappable. 88193323Sed * This is a number of seconds which the system takes as being a non-trivial 89193323Sed * amount of real time. You probably shouldn't change this; 90193323Sed * it is used in subtle ways (fractions and multiples of it are, that is, like 91193323Sed * half of a ``long time'', almost a long time, etc.) 92193323Sed * It is related to human patience and other factors which don't really 93223017Sdim * change over time. 94193323Sed */ 95193323Sed#define MAXSLP 20 96193323Sed 97198090Srdivacky/* 98198090Srdivacky * A swapped in process is given a small amount of core without being bothered 99193323Sed * by the page replacement algorithm. Basically this says that if you are 100193323Sed * swapped in you deserve some resources. We protect the last SAFERSS 101193323Sed * pages against paging and will just swap you out rather than paging you. 102193323Sed * Note that each process has at least UPAGES pages which are not 103193323Sed * paged anyways, in addition to SAFERSS. 104198090Srdivacky */ 105193323Sed#define SAFERSS 10 /* nominal ``small'' resident set size 106193323Sed protected against replacement */ 107193323Sed 108193323Sed/* 109193323Sed * We need region 7 virtual addresses for pagetables. 110193323Sed */ 111193323Sed#define UMA_MD_SMALL_ALLOC 112218893Sdim 113218893Sdim/* 114218893Sdim * The physical address space is sparsely populated. 115218893Sdim */ 116218893Sdim#define VM_PHYSSEG_SPARSE 117218893Sdim 118218893Sdim/* 119218893Sdim * The number of PHYSSEG entries is equal to the number of phys_avail 120218893Sdim * entries. 121218893Sdim */ 122218893Sdim#define VM_PHYSSEG_MAX 49 123218893Sdim 124218893Sdim/* 125218893Sdim * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 126218893Sdim * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 127218893Sdim * the pool from which physical pages for small UMA objects are 128218893Sdim * allocated. 129218893Sdim */ 130218893Sdim#define VM_NFREEPOOL 3 131193323Sed#define VM_FREEPOOL_CACHE 2 132193323Sed#define VM_FREEPOOL_DEFAULT 0 133193323Sed#define VM_FREEPOOL_DIRECT 1 134193323Sed 135193323Sed/* 136218893Sdim * Create one free page list. 137218893Sdim */ 138193323Sed#define VM_NFREELIST 1 139193323Sed#define VM_FREELIST_DEFAULT 0 140193323Sed 141193323Sed/* 142193323Sed * An allocation size of 256MB is supported in order to optimize the 143193323Sed * use of the identity mappings in region 7 by UMA. 144193323Sed */ 145193323Sed#define VM_NFREEORDER 16 146193323Sed 147193323Sed/* 148221345Sdim * Manipulating region bits of an address. 149221345Sdim */ 150221345Sdim#define IA64_RR_BASE(n) (((u_int64_t) (n)) << 61) 151221345Sdim#define IA64_RR_MASK(x) ((x) & ((1L << 61) - 1)) 152221345Sdim 153193323Sed#define IA64_PHYS_TO_RR6(x) ((x) | IA64_RR_BASE(6)) 154193323Sed#define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) 155193323Sed 156212904Sdim/* 157193323Sed * Page size of the identity mappings in region 7. 158193323Sed */ 159193323Sed#ifndef LOG2_ID_PAGE_SIZE 160193323Sed#define LOG2_ID_PAGE_SIZE 28 /* 256M */ 161193323Sed#endif 162212904Sdim 163193323Sed#define IA64_ID_PAGE_SHIFT (LOG2_ID_PAGE_SIZE) 164193323Sed#define IA64_ID_PAGE_SIZE (1<<(LOG2_ID_PAGE_SIZE)) 165212904Sdim#define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) 166212904Sdim 167212904Sdim#define IA64_BACKINGSTORE IA64_RR_BASE(4) 168212904Sdim 169212904Sdim/* 170212904Sdim * Mach derived constants 171205407Srdivacky */ 172205407Srdivacky 173205407Srdivacky/* user/kernel map constants */ 174205407Srdivacky#define VM_MIN_ADDRESS 0 175205407Srdivacky#define VM_MAX_ADDRESS IA64_RR_BASE(5) 176205407Srdivacky#define VM_GATEWAY_SIZE PAGE_SIZE 177205407Srdivacky#define VM_MAXUSER_ADDRESS (VM_MAX_ADDRESS + VM_GATEWAY_SIZE) 178205407Srdivacky#define VM_MIN_KERNEL_ADDRESS VM_MAXUSER_ADDRESS 179205407Srdivacky#define VM_MAX_KERNEL_ADDRESS (IA64_RR_BASE(6) - 1) 180193323Sed 181193323Sed#define KERNBASE VM_MAX_ADDRESS 182193323Sed 183193323Sed/* virtual sizes (bytes) for various kernel submaps */ 184193323Sed#ifndef VM_KMEM_SIZE 185193323Sed#define VM_KMEM_SIZE (12 * 1024 * 1024) 186193323Sed#endif 187193323Sed 188193323Sed/* 189193323Sed * How many physical pages per KVA page allocated. 190193323Sed * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), 191193323Sed * VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX) 192193323Sed * is the total KVA space allocated for kmem_map. 193193323Sed */ 194193323Sed#ifndef VM_KMEM_SIZE_SCALE 195193323Sed#define VM_KMEM_SIZE_SCALE (4) /* XXX 8192 byte pages */ 196193323Sed#endif 197193323Sed 198193323Sed/* initial pagein size of beginning of executable file */ 199193323Sed#ifndef VM_INITIAL_PAGEIN 200193323Sed#define VM_INITIAL_PAGEIN 16 201193323Sed#endif 202193323Sed 203193323Sed#endif /* !_MACHINE_VMPARAM_H */ 204193323Sed