vmparam.h revision 1.14
1 /* $NetBSD: vmparam.h,v 1.14 2000/11/14 19:01:09 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 /* 55 * We use 8K pages on the Atari. Override the PAGE_* definitions 56 * to be compile-time constants. 57 */ 58 #define PAGE_SHIFT 13 59 #define PAGE_SIZE (1 << PAGE_SHIFT) 60 #define PAGE_MASK (PAGE_SIZE - 1) 61 62 /* 63 * USRTEXT is the start of the user text/data space, while USRSTACK 64 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 65 * the number of pages from the beginning of the P0 region to the 66 * beginning of the text and from the beginning of the P1 region to the 67 * beginning of the stack respectively. 68 * 69 * These are a mixture of i386, sun3 and hp settings.. 70 */ 71 72 /* Sun settings. Still hope, that I might get sun3 binaries to work... */ 73 #define USRTEXT 0x2000 74 #define USRSTACK 0x0E000000 75 #define LOWPAGES btoc(USRTEXT) 76 #define KUSER_AREA (-UPAGES*NBPG) 77 /* 78 * Virtual memory related constants, all in bytes 79 */ 80 81 #ifndef MAXTSIZ 82 #define MAXTSIZ (6*1024*1024) /* max text size */ 83 #endif 84 #ifndef DFLDSIZ 85 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 86 #endif 87 #ifndef MAXDSIZ 88 #define MAXDSIZ (64*1024*1024) /* max data size */ 89 #endif 90 #ifndef DFLSSIZ 91 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 92 #endif 93 #ifndef MAXSSIZ 94 #define MAXSSIZ (32*1024*1024) /* max stack size */ 95 #endif 96 97 /* 98 * Sizes of the system and user portions of the system page table. 99 */ 100 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 101 #define SYSPTSIZE (2 * NPTEPG) /* 16mb */ 102 #define USRPTSIZE (1 * NPTEPG) /* 16mb */ 103 104 /* 105 * PTEs for mapping user space into the kernel for phyio operations. 106 * One page is enough to handle 16Mb of simultaneous raw IO operations. 107 */ 108 #ifndef USRIOSIZE 109 #define USRIOSIZE (1 * NPTEPG) /* 16mb */ 110 #endif 111 112 /* 113 * PTEs for system V style shared memory. 114 * This is basically slop for kmempt which we actually allocate (malloc) from. 115 */ 116 #ifndef SHMMAXPGS 117 #define SHMMAXPGS (1 * NPTEPG) /* 16mb */ 118 #endif 119 120 /* 121 * The time for a process to be blocked before being very swappable. 122 * This is a number of seconds which the system takes as being a non-trivial 123 * amount of real time. You probably shouldn't change this; 124 * it is used in subtle ways (fractions and multiples of it are, that is, like 125 * half of a ``long time'', almost a long time, etc.) 126 * It is related to human patience and other factors which don't really 127 * change over time. 128 */ 129 #define MAXSLP 20 130 131 /* 132 * user/kernel map constants 133 */ 134 #define VM_MIN_ADDRESS ((vaddr_t)0) 135 #define VM_MAX_ADDRESS ((vaddr_t)(USRSTACK)) 136 #define VM_MAXUSER_ADDRESS ((vaddr_t)(VM_MAX_ADDRESS)) 137 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 138 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG)) 139 140 /* 141 * virtual sizes (bytes) for various kernel submaps 142 */ 143 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 144 145 /* 146 * Our bootloader currently passes up to 2 segments (ST and TT ram). 147 */ 148 #define VM_PHYSSEG_MAX (2) 149 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 150 #define VM_PHYSSEG_NOADD 151 152 #define VM_NFREELIST 1 153 #define VM_FREELIST_DEFAULT 0 154 155 /* 156 * pmap-specific data stored in the vm_physmem[] array. 157 */ 158 struct pmap_physseg { 159 struct pv_entry *pvent; /* pv table for this seg */ 160 char *attrs; /* page attributes for this seg */ 161 }; 162 163 164 /* 165 * number of kernel PT pages (initial only, can grow dynamically) 166 */ 167 #define VM_KERNEL_PT_PAGES ((vsize_t)4) /* XXX: SYSPTSIZE */ 168 #endif /* !_MACHINE_VMPARAM_H_ */ 169
Indexes created Sun Sep 21 20:09:37 GMT 2025