1 /* $NetBSD: vmparam.h,v 1.6 2004/07/18 23:21:35 chs 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 /* 36 * We use 4K pages on the HP PHA. Override the PAGE_* definitions 37 * to be compile-time constants. 38 */ 39 #define PAGE_SHIFT 12 40 #define PAGE_SIZE (1 << PAGE_SHIFT) 41 #define PAGE_MASK (PAGE_SIZE - 1) 42 43 /* 44 * USRSTACK is the top (end) of the user stack. 45 */ 46 #define USRSTACK 0x70000000 /* Start of user stack */ 47 #define SYSCALLGATE 0xC0000000 /* syscall gateway page */ 48 49 /* Alignment requirement for a uspace. */ 50 #define USPACE_ALIGN PAGE_SIZE 51 52 /* 53 * Virtual memory related constants, all in bytes 54 */ 55 #ifndef MAXTSIZ 56 #define MAXTSIZ (0x40000000) /* max text size */ 57 #endif 58 #ifndef DFLDSIZ 59 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 60 #endif 61 #ifndef MAXDSIZ 62 #define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */ 63 #endif 64 #ifndef DFLSSIZ 65 #define DFLSSIZ (512*1024) /* initial stack size limit */ 66 #endif 67 #ifndef MAXSSIZ 68 #define MAXSSIZ (256*1024*1024) /* max stack size */ 69 #endif 70 71 #ifndef USRIOSIZE 72 #define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */ 73 #endif 74 75 /* 76 * PTEs for system V style shared memory. 77 * This is basically slop for kmempt which we actually allocate (malloc) from. 78 */ 79 #ifndef SHMMAXPGS 80 #define SHMMAXPGS ((1024*1024*10)/PAGE_SIZE) /* 10mb */ 81 #endif 82 83 /* 84 * The time for a process to be blocked before being very swappable. 85 * This is a number of seconds which the system takes as being a non-trivial 86 * amount of real time. You probably shouldn't change this; 87 * it is used in subtle ways (fractions and multiples of it are, that is, like 88 * half of a ``long time'', almost a long time, etc.) 89 * It is related to human patience and other factors which don't really 90 * change over time. 91 */ 92 #define MAXSLP 20 93 94 /* user/kernel map constants */ 95 #define VM_MIN_ADDRESS ((vaddr_t)0) 96 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000) 97 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 98 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 99 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xf0000000) 100 101 /* virtual sizes (bytes) for various kernel submaps */ 102 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 103 104 #define VM_PHYSSEG_MAX 8 /* this many physmem segments */ 105 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 106 107 #define VM_PHYSSEG_NOADD /* XXX until uvm code is fixed */ 108 109 #define VM_NFREELIST 1 110 #define VM_FREELIST_DEFAULT 0 111 112 #endif /* _HPPA_VMPARAM_H_ */ 113