1 /* $NetBSD: vmparam.h,v 1.19 2010/11/16 09:34:24 uebayasi Exp $ */ 2 3 /* $OpenBSD: vmparam.h,v 1.33 2006/06/04 17:21:24 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 PA. 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 bottom (start) of the user stack. 45 */ 46 #define USRSTACK 0x70000000 /* Start of user stack */ 47 #define SYSCALLGATE 0xC0000000 /* syscall gateway page */ 48 49 /* 50 * Virtual memory related constants, all in bytes 51 */ 52 #ifndef MAXTSIZ 53 #define MAXTSIZ (0x40000000) /* max text size */ 54 #endif 55 #ifndef DFLDSIZ 56 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 57 #endif 58 #ifndef MAXDSIZ 59 #define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */ 60 #endif 61 #ifndef DFLSSIZ 62 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 63 #endif 64 #ifndef MAXSSIZ 65 #define MAXSSIZ (256*1024*1024) /* max stack size */ 66 #endif 67 68 #ifndef USRIOSIZE 69 #define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */ 70 #endif 71 72 /* 73 * The time for a process to be blocked before being very swappable. 74 * This is a number of seconds which the system takes as being a non-trivial 75 * amount of real time. You probably shouldn't change this; 76 * it is used in subtle ways (fractions and multiples of it are, that is, like 77 * half of a ``long time'', almost a long time, etc.) 78 * It is related to human patience and other factors which don't really 79 * change over time. 80 */ 81 /* XXXNH - remove??? */ 82 #define MAXSLP 20 83 84 /* user/kernel map constants */ 85 #define VM_MIN_ADDRESS ((vaddr_t)0) 86 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000) 87 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 88 89 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xc0001000) 90 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xef000000) 91 92 /* virtual sizes (bytes) for various kernel submaps */ 93 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 94 95 #define VM_PHYSSEG_MAX 8 /* this many physmem segments */ 96 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 97 98 #define VM_NFREELIST 2 99 #define VM_FREELIST_DEFAULT 0 100 #define VM_FREELIST_ISADMA 1 101 102 #endif /* _HPPA_VMPARAM_H_ */ 103