vmparam.h revision 1.42
1 /* $NetBSD: vmparam.h,v 1.42 2011/02/08 20:20:18 rmind 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. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 /*- 38 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 39 * Michael L. Finch, Bradley A. Grantham, and 40 * Lawrence A. Kesteloot 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the Alice Group. 54 * 4. The names of the Alice Group or any of its members may not be used 55 * to endorse or promote products derived from this software without 56 * specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 67 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 * 69 */ 70 /* 71 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 72 * 73 * @(#)vmparam.h 7.3 (Berkeley) 5/7/91 74 */ 75 76 #ifndef _MAC68K_VMPARAM_H_ 77 #define _MAC68K_VMPARAM_H_ 78 79 /* 80 * Machine dependent constants for mac68k -- mostly derived from hp300. 81 */ 82 83 /* 84 * We use 4K pages on the mac68k. Override the PAGE_* definitions 85 * to be compile-time constants. 86 */ 87 #define PAGE_SHIFT PGSHIFT 88 #define PAGE_SIZE (1 << PAGE_SHIFT) 89 #define PAGE_MASK (PAGE_SIZE - 1) 90 91 /* 92 * USRSTACK is the top (end) of the user stack. 93 * 94 * NOTE: HP300 uses HIGHPAGES == (0x100000/PAGE_SIZE) for HP/UX compatibility. 95 * Do we care? Obviously not at the moment. 96 */ 97 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 98 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 99 #define P1PAGES 0x100000 100 #define HIGHPAGES 3 /* UPAGES */ 101 102 /* 103 * Virtual memory related constants, all in bytes 104 */ 105 #ifndef MAXTSIZ 106 #define MAXTSIZ (8*1024*1024) /* max text size */ 107 #endif 108 #ifndef DFLDSIZ 109 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 110 #endif 111 #ifndef MAXDSIZ 112 #define MAXDSIZ (64*1024*1024) /* max data size */ 113 #endif 114 #ifndef DFLSSIZ 115 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 116 #endif 117 #ifndef MAXSSIZ 118 #define MAXSSIZ (32*1024*1024) /* max stack size */ 119 #endif 120 121 /* 122 * Sizes of the system and user portions of the system page table. 123 */ 124 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 125 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 126 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 127 128 /* 129 * PTEs for mapping user space into the kernel for phyio operations. 130 * One page is enough to handle 4Mb of simultaneous raw IO operations. 131 */ 132 #ifndef USRIOSIZE 133 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 134 #endif 135 136 /* 137 * Mach derived constants 138 */ 139 140 /* user/kernel map constants */ 141 #define VM_MIN_ADDRESS ((vaddr_t)0) 142 #define VM_MAXUSER_ADDRESS ((vaddr_t)(USRSTACK)) 143 #define VM_MAX_ADDRESS ((vaddr_t)(0-(UPAGES*PAGE_SIZE))) 144 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 145 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG)) 146 147 /* virtual sizes (bytes) for various kernel submaps */ 148 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 149 150 /* # of kernel PT pages (initial only, can grow dynamically) */ 151 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 152 153 /* 154 * Constants which control the way the VM system deals with memory segments. 155 * Most mac68k systems have only 1 physical memory segment, but some have 2. 156 * 157 * On the systems that have multiple segments, specifically the IIsi and 158 * IIci, the optimal configuration is to put the higher-density SIMMs in 159 * bank B. This is because the on-board video uses main memory in bank A 160 * for the framebuffer, and a memory controller prevents access during 161 * video refresh cycles. Even if both banks contain the same amount of 162 * RAM, a minimum of ~320KB will be subtracted from the amount in bank A 163 * for the framebuffer (if on-board video is in use). 164 */ 165 #define VM_PHYSSEG_MAX 2 166 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 167 168 #define VM_NFREELIST 1 169 #define VM_FREELIST_DEFAULT 0 170 171 #define __HAVE_PMAP_PHYSSEG 172 173 /* 174 * pmap-specific data stored in the vm_physmem[] array. 175 */ 176 struct pmap_physseg { 177 struct pv_header *pvheader; /* pv table for this seg */ 178 }; 179 180 #endif /* _MAC68K_VMPARAM_H_ */ 181
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