vmparam.h revision 1.17
1 /* $NetBSD: vmparam.h,v 1.17 2005/04/01 11:59:33 yamt Exp $ */ 2 3 /* 4 * This file was taken from from mvme68k/include/vmparam.h and 5 * should probably be re-synced when needed. 6 * Darrin B Jewell <jewell (at) mit.edu> Fri Aug 28 03:22:07 1998 7 * original cvs id: NetBSD: vmparam.h,v 1.9 1998/08/22 10:55:34 scw Exp 8 */ 9 10 /* 11 * Copyright (c) 1982, 1986, 1990, 1993 12 * The Regents of the University of California. All rights reserved. 13 * 14 * This code is derived from software contributed to Berkeley by 15 * the Systems Programming Group of the University of Utah Computer 16 * Science Department. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 43 * 44 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 45 */ 46 /* 47 * Copyright (c) 1988 University of Utah. 48 * 49 * This code is derived from software contributed to Berkeley by 50 * the Systems Programming Group of the University of Utah Computer 51 * Science Department. 52 * 53 * Redistribution and use in source and binary forms, with or without 54 * modification, are permitted provided that the following conditions 55 * are met: 56 * 1. Redistributions of source code must retain the above copyright 57 * notice, this list of conditions and the following disclaimer. 58 * 2. Redistributions in binary form must reproduce the above copyright 59 * notice, this list of conditions and the following disclaimer in the 60 * documentation and/or other materials provided with the distribution. 61 * 3. All advertising materials mentioning features or use of this software 62 * must display the following acknowledgement: 63 * This product includes software developed by the University of 64 * California, Berkeley and its contributors. 65 * 4. Neither the name of the University nor the names of its contributors 66 * may be used to endorse or promote products derived from this software 67 * without specific prior written permission. 68 * 69 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 70 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 71 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 72 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 73 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 74 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 75 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 76 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 77 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 78 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 79 * SUCH DAMAGE. 80 * 81 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 82 * 83 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 84 */ 85 86 #ifndef _NEXT68K_VMPARAM_H_ 87 #define _NEXT68K_VMPARAM_H_ 88 89 /* 90 * Machine dependent constants for NEXT68K 91 */ 92 93 /* 94 * We use 4K pages on the NeXT. Override the PAGE_* definitions 95 * to be compile-time constants. 96 */ 97 #define PAGE_SHIFT 12 98 #define PAGE_SIZE (1 << PAGE_SHIFT) 99 #define PAGE_MASK (PAGE_SIZE - 1) 100 101 /* 102 * USRSTACK is the top (end) of the user stack. 103 * 104 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 105 * is for HPUX compatibility. Why?? Because HPUX's debuggers 106 * have the user's stack hard-wired at FFF00000 for post-mortems, 107 * and we must be compatible... 108 */ 109 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 110 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 111 #define P1PAGES 0x100000 112 #define HIGHPAGES (0x100000/PAGE_SIZE) 113 114 /* 115 * Virtual memory related constants, all in bytes 116 */ 117 #ifndef MAXTSIZ 118 #define MAXTSIZ (8*1024*1024) /* max text size */ 119 #endif 120 #ifndef DFLDSIZ 121 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 122 #endif 123 #ifndef MAXDSIZ 124 #define MAXDSIZ (64*1024*1024) /* max data size */ 125 #endif 126 #ifndef DFLSSIZ 127 #define DFLSSIZ (512*1024) /* initial stack size limit */ 128 #endif 129 #ifndef MAXSSIZ 130 #define MAXSSIZ MAXDSIZ /* max stack size */ 131 #endif 132 133 /* 134 * Sizes of the system and user portions of the system page table. 135 */ 136 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 137 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 138 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 139 140 /* 141 * PTEs for mapping user space into the kernel for phyio operations. 142 * One page is enough to handle 4Mb of simultaneous raw IO operations. 143 */ 144 #ifndef USRIOSIZE 145 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 146 #endif 147 148 /* 149 * PTEs for system V style shared memory. 150 * This is basically slop for kmempt which we actually allocate (malloc) from. 151 */ 152 #ifndef SHMMAXPGS 153 #define SHMMAXPGS 1024 /* 4mb */ 154 #endif 155 156 /* 157 * Mach derived constants 158 */ 159 160 /* user/kernel map constants */ 161 #define VM_MIN_ADDRESS ((vaddr_t)0) 162 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 163 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 164 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 165 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG*2)) 166 167 /* virtual sizes (bytes) for various kernel submaps */ 168 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 169 170 /* # of kernel PT pages (initial only, can grow dynamically) */ 171 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 172 173 /* 174 * Constants which control the way the VM system deals with memory segments. 175 */ 176 #define VM_PHYSSEG_MAX 5 /* @@@ should really come from N_SIMM */ 177 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 178 #define VM_PHYSSEG_NOADD /* @@@ does the NeXT really need this? */ 179 #define VM_NFREELIST 1 180 #define VM_FREELIST_DEFAULT 0 181 182 #define __HAVE_PMAP_PHYSSEG 183 184 /* 185 * pmap-specific data stored in the vm_physmem[] array. 186 */ 187 struct pmap_physseg { 188 struct pv_entry *pvent; /* pv table for this seg */ 189 char *attrs; /* page attributes for this seg */ 190 }; 191 192 #endif /* _MVME68K_VMPARAM_H_ */ 193
Indexes created Mon Sep 22 05:09:51 GMT 2025