1 /* $OpenBSD: vmparam.h,v 1.16 2001/08/12 20:06:11 miod Exp $ */ 2 3 /* 4 * Copyright (c) 1988-1994, The University of Utah and 5 * the Computer Systems Laboratory at the University of Utah (CSL). 6 * All rights reserved. 7 * 8 * Permission to use, copy, modify and distribute this software is hereby 9 * granted provided that (1) source code retains these copyright, permission, 10 * and disclaimer notices, and (2) redistributions including binaries 11 * reproduce the notices in supporting documentation, and (3) all advertising 12 * materials mentioning features or use of this software display the following 13 * acknowledgement: ``This product includes software developed by the 14 * Computer Systems Laboratory at the University of Utah.'' 15 * 16 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 17 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 18 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 21 * improvements that they make and grant CSL redistribution rights. 22 * 23 * Utah $Hdr: vmparam.h 1.16 94/12/16$ 24 */ 25 26 #ifndef _MACHINE_VMPARAM_H_ 27 #define _MACHINE_VMPARAM_H_ 28 29 /* 30 * Machine dependent constants for HP PA 31 */ 32 /* 33 * USRTEXT is the start of the user text/data space, while USRSTACK 34 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 35 * the number of pages from the beginning of the P0 region to the 36 * beginning of the text and from the beginning of the P1 region to the 37 * beginning of the stack respectively. 38 */ 39 #define USRTEXT 0x00002000 /* Start of user .text */ 40 #define USRSTACK 0x68FF3000 /* Start of user stack */ 41 #define LOWPAGES 0 42 #define HIGHPAGES UPAGES 43 #define SYSCALLGATE 0xC0000000 /* syscall gateway page */ 44 45 /* 46 * Virtual memory related constants, all in bytes 47 */ 48 #ifndef MAXTSIZ 49 #define MAXTSIZ (0x40000000) /* max text size */ 50 #endif 51 #ifndef DFLDSIZ 52 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 53 #endif 54 #ifndef MAXDSIZ 55 #define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */ 56 #endif 57 #ifndef DFLSSIZ 58 #define DFLSSIZ (512*1024) /* initial stack size limit */ 59 #endif 60 #ifndef MAXSSIZ 61 #define MAXSSIZ (UADDR-USRSTACK) /* max stack size */ 62 #endif 63 64 /* 65 * Default sizes of swap allocation chunks (see dmap.h). 66 * The actual values may be changed in vminit() based on MAXDSIZ. 67 * With MAXDSIZ of 64Mb and NDMAP of 62, dmmax will be 4096. 68 * DMMIN should be at least ctod(1) so that vtod() works. 69 * vminit() ensures this. 70 */ 71 #define DMMIN 32 /* smallest swap allocation */ 72 #define DMMAX 4096 /* largest potential swap allocation */ 73 74 #ifndef USRIOSIZE 75 #define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */ 76 #endif 77 78 /* 79 * PTEs for system V style shared memory. 80 * This is basically slop for kmempt which we actually allocate (malloc) from. 81 */ 82 #ifndef SHMMAXPGS 83 #define SHMMAXPGS ((1024*1024*10)/NBPG) /* 10mb */ 84 #endif 85 86 /* 87 * The time for a process to be blocked before being very swappable. 88 * This is a number of seconds which the system takes as being a non-trivial 89 * amount of real time. You probably shouldn't change this; 90 * it is used in subtle ways (fractions and multiples of it are, that is, like 91 * half of a ``long time'', almost a long time, etc.) 92 * It is related to human patience and other factors which don't really 93 * change over time. 94 */ 95 #define MAXSLP 20 96 97 /* 98 * A swapped in process is given a small amount of core without being bothered 99 * by the page replacement algorithm. Basically this says that if you are 100 * swapped in you deserve some resources. We protect the last SAFERSS 101 * pages against paging and will just swap you out rather than paging you. 102 */ 103 #define SAFERSS (0x4000/NBPG) /* nominal ``small'' resident set size 104 protected against replacement */ 105 106 /* user/kernel map constants */ 107 #define VM_MIN_ADDRESS ((vaddr_t)0) 108 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000) 109 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 110 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 111 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xf0000000) 112 113 /* virtual sizes (bytes) for various kernel submaps */ 114 #define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES) 115 #define VM_KMEM_SIZE (NKMEMCLUSTERS*PAGE_SIZE) 116 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 117 118 #define VM_PHYSSEG_MAX 8 /* this many physmem segments */ 119 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 120 121 #define VM_PHYSSEG_NOADD /* XXX until uvm code is fixed */ 122 123 #define VM_NFREELIST 2 124 #define VM_FREELIST_DEFAULT 0 125 #define VM_FREELIST_FIRST16 1 126 127 #ifdef _KERNEL 128 struct pmap_physseg { 129 struct pv_entry *pvent; 130 }; 131 #endif 132 133 #endif /* _MACHINE_VMPARAM_H_ */ 134 135