1 /* $NetBSD: vmparam.h,v 1.22 2021/02/26 01:48:20 simonb 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 #define __USE_TOPDOWN_VM 32 33 /* 34 * Machine dependent constants for HP PA 35 */ 36 37 /* 38 * We use 4K pages on the HP PA. Override the PAGE_* definitions 39 * to be compile-time constants. 40 */ 41 #define PAGE_SHIFT 12 42 #define PAGE_SIZE (1 << PAGE_SHIFT) 43 #define PAGE_MASK (PAGE_SIZE - 1) 44 45 /* 46 * USRSTACK is the bottom (start) of the user stack. 47 */ 48 #define USRSTACK (VM_MAXUSER_ADDRESS - MAXSSIZ) /* Start of user stack */ 49 #define SYSCALLGATE 0xc0000000 /* syscall gateway page */ 50 51 /* 52 * Virtual memory related constants, all in bytes 53 */ 54 #ifndef MAXTSIZ 55 #define MAXTSIZ (1024*1024*1024) /* max text size */ 56 #endif 57 #ifndef DFLDSIZ 58 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 59 #endif 60 #ifndef MAXDSIZ 61 #define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */ 62 #endif 63 #ifndef DFLSSIZ 64 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 65 #endif 66 #ifndef MAXSSIZ 67 #define MAXSSIZ (256*1024*1024) /* max stack size */ 68 #endif 69 70 #ifndef USRIOSIZE 71 #define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */ 72 #endif 73 74 /* 75 * The time for a process to be blocked before being very swappable. 76 * This is a number of seconds which the system takes as being a non-trivial 77 * amount of real time. You probably shouldn't change this; 78 * it is used in subtle ways (fractions and multiples of it are, that is, like 79 * half of a ``long time'', almost a long time, etc.) 80 * It is related to human patience and other factors which don't really 81 * change over time. 82 */ 83 /* XXXNH - remove??? */ 84 #define MAXSLP 20 85 86 /* user/kernel map constants */ 87 #define VM_MIN_ADDRESS ((vaddr_t)0) 88 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000) 89 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 90 91 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xc0001000) 92 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xef000000) 93 94 /* virtual sizes (bytes) for various kernel submaps */ 95 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 96 97 #define VM_PHYSSEG_MAX 8 /* this many physmem segments */ 98 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 99 100 #define VM_NFREELIST 2 101 #define VM_FREELIST_DEFAULT 0 102 #define VM_FREELIST_ISADMA 1 103 104 #endif /* _HPPA_VMPARAM_H_ */ 105