1 /* $NetBSD: vmparam.h,v 1.13 2000/02/11 19:25:14 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 41 * 42 * @(#)vmparam.h 7.3 (Berkeley) 5/7/91 43 */ 44 45 #ifndef _MACHINE_VMPARAM_H_ 46 #define _MACHINE_VMPARAM_H_ 47 48 #include <machine/pte.h> 49 50 /* 51 * Machine dependent constants for HP300 52 */ 53 /* 54 * USRTEXT is the start of the user text/data space, while USRSTACK 55 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 56 * the number of pages from the beginning of the P0 region to the 57 * beginning of the text and from the beginning of the P1 region to the 58 * beginning of the stack respectively. 59 * 60 * These are a mixture of i386, sun3 and hp settings.. 61 */ 62 63 /* Sun settings. Still hope, that I might get sun3 binaries to work... */ 64 #define USRTEXT 0x2000 65 #define USRSTACK 0x0E000000 66 #define LOWPAGES btoc(USRTEXT) 67 #define KUSER_AREA (-UPAGES*NBPG) 68 /* 69 * Virtual memory related constants, all in bytes 70 */ 71 72 #ifndef MAXTSIZ 73 #define MAXTSIZ (6*1024*1024) /* max text size */ 74 #endif 75 #ifndef DFLDSIZ 76 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 77 #endif 78 #ifndef MAXDSIZ 79 #define MAXDSIZ (64*1024*1024) /* max data size */ 80 #endif 81 #ifndef DFLSSIZ 82 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 83 #endif 84 #ifndef MAXSSIZ 85 #define MAXSSIZ (32*1024*1024) /* max stack size */ 86 #endif 87 88 /* 89 * Sizes of the system and user portions of the system page table. 90 */ 91 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 92 #define SYSPTSIZE (2 * NPTEPG) /* 16mb */ 93 #define USRPTSIZE (1 * NPTEPG) /* 16mb */ 94 95 /* 96 * PTEs for mapping user space into the kernel for phyio operations. 97 * One page is enough to handle 16Mb of simultaneous raw IO operations. 98 */ 99 #ifndef USRIOSIZE 100 #define USRIOSIZE (1 * NPTEPG) /* 16mb */ 101 #endif 102 103 /* 104 * PTEs for system V style shared memory. 105 * This is basically slop for kmempt which we actually allocate (malloc) from. 106 */ 107 #ifndef SHMMAXPGS 108 #define SHMMAXPGS (1 * NPTEPG) /* 16mb */ 109 #endif 110 111 /* 112 * The time for a process to be blocked before being very swappable. 113 * This is a number of seconds which the system takes as being a non-trivial 114 * amount of real time. You probably shouldn't change this; 115 * it is used in subtle ways (fractions and multiples of it are, that is, like 116 * half of a ``long time'', almost a long time, etc.) 117 * It is related to human patience and other factors which don't really 118 * change over time. 119 */ 120 #define MAXSLP 20 121 122 /* 123 * user/kernel map constants 124 */ 125 #define VM_MIN_ADDRESS ((vaddr_t)0) 126 #define VM_MAX_ADDRESS ((vaddr_t)(USRSTACK)) 127 #define VM_MAXUSER_ADDRESS ((vaddr_t)(VM_MAX_ADDRESS)) 128 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 129 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG)) 130 131 /* 132 * virtual sizes (bytes) for various kernel submaps 133 */ 134 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 135 136 /* 137 * Our bootloader currently passes up to 2 segments (ST and TT ram). 138 */ 139 #define VM_PHYSSEG_MAX (2) 140 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 141 #define VM_PHYSSEG_NOADD 142 143 #define VM_NFREELIST 1 144 #define VM_FREELIST_DEFAULT 0 145 146 /* 147 * pmap-specific data stored in the vm_physmem[] array. 148 */ 149 struct pmap_physseg { 150 struct pv_entry *pvent; /* pv table for this seg */ 151 char *attrs; /* page attributes for this seg */ 152 }; 153 154 155 /* 156 * number of kernel PT pages (initial only, can grow dynamically) 157 */ 158 #define VM_KERNEL_PT_PAGES ((vsize_t)4) /* XXX: SYSPTSIZE */ 159 #endif /* !_MACHINE_VMPARAM_H_ */ 160