vmparam.h revision 1.15
1 /* $NetBSD: vmparam.h,v 1.15 2003/04/02 07:36:01 thorpej 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) 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 * USRSTACK is the top (end) of the user stack. 69 * 70 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 71 * is for HPUX compatibility. Why?? Because HPUX's debuggers 72 * have the user's stack hard-wired at FFF00000 for post-mortems, 73 * and we must be compatible... 74 */ 75 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 76 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 77 #define P1PAGES 0x100000 78 #define HIGHPAGES (0x100000/PAGE_SIZE) 79 80 /* 81 * Virtual memory related constants, all in bytes 82 */ 83 #ifndef MAXTSIZ 84 #define MAXTSIZ (8*1024*1024) /* max text size */ 85 #endif 86 #ifndef DFLDSIZ 87 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 88 #endif 89 #ifndef MAXDSIZ 90 #define MAXDSIZ (64*1024*1024) /* max data size */ 91 #endif 92 #ifndef DFLSSIZ 93 #define DFLSSIZ (512*1024) /* initial stack size limit */ 94 #endif 95 #ifndef MAXSSIZ 96 #define MAXSSIZ MAXDSIZ /* max stack size */ 97 #endif 98 99 /* 100 * Sizes of the system and user portions of the system page table. 101 */ 102 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 103 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 104 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 105 106 /* 107 * PTEs for mapping user space into the kernel for phyio operations. 108 * One page is enough to handle 4Mb of simultaneous raw IO operations. 109 */ 110 #ifndef USRIOSIZE 111 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 112 #endif 113 114 /* 115 * PTEs for system V style shared memory. 116 * This is basically slop for kmempt which we actually allocate (malloc) from. 117 */ 118 #ifndef SHMMAXPGS 119 #define SHMMAXPGS 1024 /* 4mb */ 120 #endif 121 122 /* 123 * Mach derived constants 124 */ 125 126 /* user/kernel map constants */ 127 #define VM_MIN_ADDRESS ((vaddr_t)0) 128 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 129 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 130 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 131 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 132 133 /* virtual sizes (bytes) for various kernel submaps */ 134 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 135 136 /* # of kernel PT pages (initial only, can grow dynamically) */ 137 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 138 139 /* 140 * Constants which control the way the VM system deals with memory segments. 141 */ 142 #define VM_PHYSSEG_MAX 5 /* @@@ should really come from N_SIMM */ 143 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 144 #define VM_PHYSSEG_NOADD /* @@@ does the NeXT really need this? */ 145 #define VM_NFREELIST 1 146 #define VM_FREELIST_DEFAULT 0 147 148 #define __HAVE_PMAP_PHYSSEG 149 150 /* 151 * pmap-specific data stored in the vm_physmem[] array. 152 */ 153 struct pmap_physseg { 154 struct pv_entry *pvent; /* pv table for this seg */ 155 char *attrs; /* page attributes for this seg */ 156 }; 157 158 #endif /* _MVME68K_VMPARAM_H_ */ 159
Indexes created Mon Sep 22 13:09:51 GMT 2025