1 /* $NetBSD: vmparam.h,v 1.29 2001/06/02 01:19:29 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)vmparam.h 8.1 (Berkeley) 6/11/93 45 */ 46 47 #ifndef _SPARC_VMPARAM_H_ 48 #define _SPARC_VMPARAM_H_ 49 50 /* 51 * Machine dependent constants for Sun-4c SPARC 52 */ 53 54 #include <machine/param.h> 55 56 /* 57 * USRTEXT is the start of the user text/data space, while USRSTACK 58 * is the top (end) of the user stack. 59 */ 60 #define USRTEXT 0x2000 /* Start of user text */ 61 #define USRSTACK KERNBASE /* Start of user stack */ 62 63 /* 64 * Virtual memory related constants, all in bytes 65 */ 66 #ifndef MAXTSIZ 67 #define MAXTSIZ (64*1024*1024) /* max text size */ 68 #endif 69 #ifndef DFLDSIZ 70 #define DFLDSIZ (64*1024*1024) /* initial data size limit */ 71 #endif 72 #ifndef MAXDSIZ 73 #define MAXDSIZ (256*1024*1024) /* max data size */ 74 #endif 75 #ifndef DFLSSIZ 76 #define DFLSSIZ (512*1024) /* initial stack size limit */ 77 #endif 78 #ifndef MAXSSIZ 79 #define MAXSSIZ MAXDSIZ /* max stack size */ 80 #endif 81 82 /* 83 * Size of shared memory map 84 */ 85 #ifndef SHMMAXPGS 86 #define SHMMAXPGS 1024 87 #endif 88 89 /* 90 * The time for a process to be blocked before being very swappable. 91 * This is a number of seconds which the system takes as being a non-trivial 92 * amount of real time. You probably shouldn't change this; 93 * it is used in subtle ways (fractions and multiples of it are, that is, like 94 * half of a ``long time'', almost a long time, etc.) 95 * It is related to human patience and other factors which don't really 96 * change over time. 97 */ 98 #define MAXSLP 20 99 100 /* 101 * Mach derived constants 102 */ 103 104 /* 105 * User/kernel map constants. Note that sparc/vaddrs.h defines the 106 * IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS: 107 * tread with care. 108 */ 109 #define VM_MIN_ADDRESS ((vaddr_t)0) 110 #define VM_MAX_ADDRESS ((vaddr_t)KERNBASE) 111 #define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE) 112 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 113 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND) 114 115 #define VM_PHYSSEG_MAX 32 /* up to 32 segments */ 116 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 117 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 118 119 #define VM_NFREELIST 1 120 #define VM_FREELIST_DEFAULT 0 121 122 #if !defined(_LKM) 123 /* 124 * Make the VM PAGE_* macros constants, if possible. 125 */ 126 #if NBPG == 4096 || NBPG == 8192 127 #define PAGE_SIZE NBPG 128 #define PAGE_SHIFT PGSHIFT 129 #define PAGE_MASK (NBPG-1) 130 #endif 131 #endif /* _LKM */ 132 133 #define __HAVE_PMAP_PHYSSEG 134 135 /* 136 * pmap specific data stored in the vm_physmem[] array 137 */ 138 struct pvlist; 139 struct pmap_physseg { 140 struct pvlist *pvhead; 141 }; 142 #endif /* _SPARC_VMPARAM_H_ */ 143