1 /* $NetBSD: vmparam.h,v 1.13 2001/11/15 18:06:16 soren 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@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) 1988 University of Utah. 12 * Copyright (c) 1982, 1986, 1990, 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * This code is derived from software contributed to Berkeley by 16 * the Systems Programming Group of the University of Utah Computer 17 * Science Department. 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions 21 * are met: 22 * 1. Redistributions of source code must retain the above copyright 23 * notice, this list of conditions and the following disclaimer. 24 * 2. Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 3. All advertising materials mentioning features or use of this software 28 * must display the following acknowledgement: 29 * This product includes software developed by the University of 30 * California, Berkeley and its contributors. 31 * 4. Neither the name of the University nor the names of its contributors 32 * may be used to endorse or promote products derived from this software 33 * without specific prior written permission. 34 * 35 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 36 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 38 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 39 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 40 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 41 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 42 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 43 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 44 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 45 * SUCH DAMAGE. 46 * 47 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 48 * 49 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 50 */ 51 52 #ifndef _NEXT68K_VMPARAM_H_ 53 #define _NEXT68K_VMPARAM_H_ 54 55 /* 56 * Machine dependent constants for NEXT68K 57 */ 58 59 /* 60 * We use 4K pages on the NeXT. Override the PAGE_* definitions 61 * to be compile-time constants. 62 */ 63 #define PAGE_SHIFT 12 64 #define PAGE_SIZE (1 << PAGE_SHIFT) 65 #define PAGE_MASK (PAGE_SIZE - 1) 66 67 /* 68 * USRTEXT is the start of the user text/data space, while USRSTACK 69 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 70 * the number of pages from the beginning of the P0 region to the 71 * beginning of the text and from the beginning of the P1 region to the 72 * beginning of the stack respectively. 73 * 74 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 75 * is for HPUX compatibility. Why?? Because HPUX's debuggers 76 * have the user's stack hard-wired at FFF00000 for post-mortems, 77 * and we must be compatible... 78 */ 79 #define USRTEXT 8192 /* Must equal __LDPGSZ */ 80 #define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */ 81 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 82 #define P1PAGES 0x100000 83 #define LOWPAGES 0 84 #define HIGHPAGES (0x100000/NBPG) 85 86 /* 87 * Virtual memory related constants, all in bytes 88 */ 89 #ifndef MAXTSIZ 90 #define MAXTSIZ (8*1024*1024) /* max text size */ 91 #endif 92 #ifndef DFLDSIZ 93 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 94 #endif 95 #ifndef MAXDSIZ 96 #define MAXDSIZ (64*1024*1024) /* max data size */ 97 #endif 98 #ifndef DFLSSIZ 99 #define DFLSSIZ (512*1024) /* initial stack size limit */ 100 #endif 101 #ifndef MAXSSIZ 102 #define MAXSSIZ MAXDSIZ /* max stack size */ 103 #endif 104 105 /* 106 * Sizes of the system and user portions of the system page table. 107 */ 108 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 109 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 110 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 111 112 /* 113 * PTEs for mapping user space into the kernel for phyio operations. 114 * One page is enough to handle 4Mb of simultaneous raw IO operations. 115 */ 116 #ifndef USRIOSIZE 117 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 118 #endif 119 120 /* 121 * PTEs for system V style shared memory. 122 * This is basically slop for kmempt which we actually allocate (malloc) from. 123 */ 124 #ifndef SHMMAXPGS 125 #define SHMMAXPGS 1024 /* 4mb */ 126 #endif 127 128 /* 129 * Mach derived constants 130 */ 131 132 /* user/kernel map constants */ 133 #define VM_MIN_ADDRESS ((vaddr_t)0) 134 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 135 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 136 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 137 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 138 139 /* virtual sizes (bytes) for various kernel submaps */ 140 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 141 142 /* # of kernel PT pages (initial only, can grow dynamically) */ 143 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 144 145 /* 146 * Constants which control the way the VM system deals with memory segments. 147 */ 148 #define VM_PHYSSEG_MAX 5 /* @@@ should really come from N_SIMM */ 149 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 150 #define VM_PHYSSEG_NOADD /* @@@ does the NeXT really need this? */ 151 #define VM_NFREELIST 1 152 #define VM_FREELIST_DEFAULT 0 153 154 #define __HAVE_PMAP_PHYSSEG 155 156 /* 157 * pmap-specific data stored in the vm_physmem[] array. 158 */ 159 struct pmap_physseg { 160 struct pv_entry *pvent; /* pv table for this seg */ 161 char *attrs; /* page attributes for this seg */ 162 }; 163 164 #endif /* _MVME68K_VMPARAM_H_ */ 165