1 /* $NetBSD: vmparam.h,v 1.28 2021/12/05 04:54:21 msaitoh Exp $ */ 2 3 /* 4 * This file was taken 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. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 * 43 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 44 * 45 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 46 */ 47 48 #ifndef _NEXT68K_VMPARAM_H_ 49 #define _NEXT68K_VMPARAM_H_ 50 51 /* 52 * Machine dependent constants for NEXT68K 53 */ 54 55 /* 56 * Use common m68k definitions to define PAGE_SIZE and related constants. 57 */ 58 #include <m68k/vmparam.h> 59 60 /* 61 * USRSTACK is the top (end) of the user stack. 62 * 63 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 64 * is for HPUX compatibility. Why?? Because HPUX's debuggers 65 * have the user's stack hard-wired at FFF00000 for post-mortems, 66 * and we must be compatible... 67 */ 68 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 69 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 70 #define P1PAGES 0x100000 71 #define HIGHPAGES (0x100000/PAGE_SIZE) 72 73 /* 74 * Virtual memory related constants, all in bytes 75 */ 76 #ifndef MAXTSIZ 77 #define MAXTSIZ (32*1024*1024) /* max text size */ 78 #endif 79 #ifndef DFLDSIZ 80 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 81 #endif 82 #ifndef MAXDSIZ 83 #define MAXDSIZ (64*1024*1024) /* max data size */ 84 #endif 85 #ifndef DFLSSIZ 86 #define DFLSSIZ (512*1024) /* initial stack size limit */ 87 #endif 88 #ifndef MAXSSIZ 89 #define MAXSSIZ MAXDSIZ /* max stack size */ 90 #endif 91 92 /* 93 * PTEs for mapping user space into the kernel for phyio operations. 94 * One page is enough to handle 4Mb of simultaneous raw IO operations. 95 */ 96 #ifndef USRIOSIZE 97 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 98 #endif 99 100 /* 101 * Mach derived constants 102 */ 103 104 /* user/kernel map constants */ 105 #define VM_MIN_ADDRESS ((vaddr_t)0) 106 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 107 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 108 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 109 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG*2)) 110 111 /* virtual sizes (bytes) for various kernel submaps */ 112 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 113 114 /* # of kernel PT pages (initial only, can grow dynamically) */ 115 #define VM_KERNEL_PT_PAGES ((vsize_t)2) 116 117 /* 118 * Constants which control the way the VM system deals with memory segments. 119 */ 120 #define VM_PHYSSEG_MAX 5 /* @@@ should really come from N_SIMM */ 121 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 122 #define VM_NFREELIST 1 123 #define VM_FREELIST_DEFAULT 0 124 125 #define __HAVE_PMAP_PHYSSEG 126 127 /* 128 * pmap-specific data stored in the vm_physmem[] array. 129 */ 130 struct pmap_physseg { 131 struct pv_header *pvheader; /* pv table for this seg */ 132 }; 133 134 #endif /* _MVME68K_VMPARAM_H_ */ 135