1 /* $NetBSD: vmparam.h,v 1.2 2002/08/05 20:58:35 fredette Exp $ */ 2 3 /* $OpenBSD: vmparam.h,v 1.17 2001/09/22 18:00:09 miod Exp $ */ 4 5 /* 6 * Copyright (c) 1988-1994, The University of Utah and 7 * the Computer Systems Laboratory at the University of Utah (CSL). 8 * All rights reserved. 9 * 10 * Permission to use, copy, modify and distribute this software is hereby 11 * granted provided that (1) source code retains these copyright, permission, 12 * and disclaimer notices, and (2) redistributions including binaries 13 * reproduce the notices in supporting documentation, and (3) all advertising 14 * materials mentioning features or use of this software display the following 15 * acknowledgement: ``This product includes software developed by the 16 * Computer Systems Laboratory at the University of Utah.'' 17 * 18 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 19 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 20 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 21 * 22 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 23 * improvements that they make and grant CSL redistribution rights. 24 * 25 * Utah $Hdr: vmparam.h 1.16 94/12/16$ 26 */ 27 28 #ifndef _HPPA_VMPARAM_H_ 29 #define _HPPA_VMPARAM_H_ 30 31 /* 32 * Machine dependent constants for HP PA 33 */ 34 /* 35 * USRTEXT is the start of the user text/data space, while USRSTACK 36 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 37 * the number of pages from the beginning of the P0 region to the 38 * beginning of the text and from the beginning of the P1 region to the 39 * beginning of the stack respectively. 40 */ 41 #define USRTEXT 0x00002000 /* Start of user .text */ 42 #define USRSTACK 0x68FF3000 /* Start of user stack */ 43 #define LOWPAGES 0 44 #define HIGHPAGES UPAGES 45 #define SYSCALLGATE 0xC0000000 /* syscall gateway page */ 46 47 /* Alignment requirement for a uspace. */ 48 #define USPACE_ALIGN NBPG 49 50 /* 51 * Virtual memory related constants, all in bytes 52 */ 53 #ifndef MAXTSIZ 54 #define MAXTSIZ (0x40000000) /* max text size */ 55 #endif 56 #ifndef DFLDSIZ 57 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 58 #endif 59 #ifndef MAXDSIZ 60 #define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */ 61 #endif 62 #ifndef DFLSSIZ 63 #define DFLSSIZ (512*1024) /* initial stack size limit */ 64 #endif 65 #ifndef MAXSSIZ 66 #define MAXSSIZ (UADDR-USRSTACK) /* max stack size */ 67 #endif 68 69 #ifndef USRIOSIZE 70 #define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */ 71 #endif 72 73 /* 74 * PTEs for system V style shared memory. 75 * This is basically slop for kmempt which we actually allocate (malloc) from. 76 */ 77 #ifndef SHMMAXPGS 78 #define SHMMAXPGS ((1024*1024*10)/NBPG) /* 10mb */ 79 #endif 80 81 /* 82 * The time for a process to be blocked before being very swappable. 83 * This is a number of seconds which the system takes as being a non-trivial 84 * amount of real time. You probably shouldn't change this; 85 * it is used in subtle ways (fractions and multiples of it are, that is, like 86 * half of a ``long time'', almost a long time, etc.) 87 * It is related to human patience and other factors which don't really 88 * change over time. 89 */ 90 #define MAXSLP 20 91 92 /* user/kernel map constants */ 93 #define VM_MIN_ADDRESS ((vaddr_t)0) 94 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000) 95 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 96 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 97 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xf0000000) 98 99 /* virtual sizes (bytes) for various kernel submaps */ 100 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 101 102 #define VM_PHYSSEG_MAX 8 /* this many physmem segments */ 103 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 104 105 #define VM_PHYSSEG_NOADD /* XXX until uvm code is fixed */ 106 107 #define VM_NFREELIST 1 108 #define VM_FREELIST_DEFAULT 0 109 110 #endif /* _HPPA_VMPARAM_H_ */ 111 112