1 /* $NetBSD: vmparam.h,v 1.31 2001/11/15 18:06:14 soren Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 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 /*- 41 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 42 * Michael L. Finch, Bradley A. Grantham, and 43 * Lawrence A. Kesteloot 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the Alice Group. 57 * 4. The names of the Alice Group or any of its members may not be used 58 * to endorse or promote products derived from this software without 59 * specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 64 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 65 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 66 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 67 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 70 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 71 * 72 */ 73 /* 74 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 75 * 76 * @(#)vmparam.h 7.3 (Berkeley) 5/7/91 77 */ 78 79 #ifndef _MAC68K_VMPARAM_H_ 80 #define _MAC68K_VMPARAM_H_ 81 82 /* 83 * Machine dependent constants for mac68k -- mostly derived from hp300. 84 */ 85 86 /* 87 * We use 4K pages on the mac68k. Override the PAGE_* definitions 88 * to be compile-time constants. 89 */ 90 #define PAGE_SHIFT 12 91 #define PAGE_SIZE (1 << PAGE_SHIFT) 92 #define PAGE_MASK (PAGE_SIZE - 1) 93 94 /* 95 * USRTEXT is the start of the user text/data space, while USRSTACK 96 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 97 * the number of pages from the beginning of the P0 region to the 98 * beginning of the text and from the beginning of the P1 region to the 99 * beginning of the stack respectively. 100 * 101 * NOTE: HP300 uses HIGHPAGES == (0x100000/NBPG) for HP/UX compatibility. 102 * Do we care? Obviously not at the moment. 103 */ 104 #define USRTEXT 8192 105 #define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */ 106 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 107 #define P1PAGES 0x100000 108 #define LOWPAGES 0 109 #define HIGHPAGES 3 /* UPAGES */ 110 111 /* 112 * Virtual memory related constants, all in bytes 113 */ 114 #ifndef MAXTSIZ 115 #define MAXTSIZ (8*1024*1024) /* max text size */ 116 #endif 117 #ifndef DFLDSIZ 118 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 119 #endif 120 #ifndef MAXDSIZ 121 #define MAXDSIZ (64*1024*1024) /* max data size */ 122 #endif 123 #ifndef DFLSSIZ 124 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 125 #endif 126 #ifndef MAXSSIZ 127 #define MAXSSIZ (32*1024*1024) /* max stack size */ 128 #endif 129 130 /* 131 * Sizes of the system and user portions of the system page table. 132 */ 133 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 134 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 135 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 136 137 /* 138 * PTEs for mapping user space into the kernel for phyio operations. 139 * One page is enough to handle 4Mb of simultaneous raw IO operations. 140 */ 141 #ifndef USRIOSIZE 142 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 143 #endif 144 145 /* 146 * PTEs for system V style shared memory. 147 * This is basically slop for kmempt which we actually allocate (malloc) from. 148 */ 149 #ifndef SHMMAXPGS 150 #define SHMMAXPGS 1024 /* 4mb */ 151 #endif 152 153 /* 154 * Mach derived constants 155 */ 156 157 /* user/kernel map constants */ 158 #define VM_MIN_ADDRESS ((vaddr_t)0) 159 #define VM_MAXUSER_ADDRESS ((vaddr_t)(USRSTACK)) 160 #define VM_MAX_ADDRESS ((vaddr_t)(0-(UPAGES*NBPG))) 161 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 162 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG)) 163 164 /* virtual sizes (bytes) for various kernel submaps */ 165 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 166 167 /* # of kernel PT pages (initial only, can grow dynamically) */ 168 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 169 170 /* 171 * Constants which control the way the VM system deals with memory segments. 172 * Most mac68k systems have only 1 physical memory segment, but some have 2. 173 * 174 * On the systems that have multiple segments, specifically the IIsi and 175 * IIci, the optimal configuration is to put the higher-density SIMMs in 176 * bank B. This is because the on-board video uses main memory in bank A 177 * for the framebuffer, and a memory controller prevents access during 178 * video refresh cycles. Even if both banks contain the same amount of 179 * RAM, a minimum of ~320KB will be subtracted from the amount in bank A 180 * for the framebuffer (if on-board video is in use). 181 */ 182 #define VM_PHYSSEG_MAX 2 183 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 184 #define VM_PHYSSEG_NOADD 185 186 #define VM_NFREELIST 1 187 #define VM_FREELIST_DEFAULT 0 188 189 #define __HAVE_PMAP_PHYSSEG 190 191 /* 192 * pmap-specific data stored in the vm_physmem[] array. 193 */ 194 struct pmap_physseg { 195 struct pv_entry *pvent; /* pv table for this seg */ 196 char *attrs; /* page attributes for this seg */ 197 }; 198 199 #endif /* _MAC68K_VMPARAM_H_ */ 200