1 /* $NetBSD: vmparam.h,v 1.23 2001/11/15 18:06:19 soren Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 41 * 42 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 43 */ 44 45 #ifndef _X68K_VMPARAM_H_ 46 #define _X68K_VMPARAM_H_ 47 48 /* 49 * Machine dependent constants for X68K 50 */ 51 52 /* 53 * We use 4K pages on the X68K. Override the PAGE_* definitions 54 * to be compile-time constants. 55 */ 56 #define PAGE_SHIFT 12 57 #define PAGE_SIZE (1 << PAGE_SHIFT) 58 #define PAGE_MASK (PAGE_SIZE - 1) 59 60 /* 61 * USRTEXT is the start of the user text/data space, while USRSTACK 62 * is the top (end) of the user stack. 63 */ 64 #define USRTEXT 8192 /* Must equal __LDPGSZ */ 65 #define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */ 66 67 /* 68 * Virtual memory related constants, all in bytes 69 */ 70 #ifndef MAXTSIZ 71 #define MAXTSIZ (8*1024*1024) /* max text size */ 72 #endif 73 #ifndef DFLDSIZ 74 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 75 #endif 76 #ifndef MAXDSIZ 77 #define MAXDSIZ (64*1024*1024) /* max data size */ 78 #endif 79 #ifndef DFLSSIZ 80 #define DFLSSIZ (512*1024) /* initial stack size limit */ 81 #endif 82 #ifndef MAXSSIZ 83 #define MAXSSIZ MAXDSIZ /* max stack size */ 84 #endif 85 86 /* 87 * Sizes of the system and user portions of the system page table. 88 */ 89 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 90 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 91 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 92 93 /* 94 * PTEs for mapping user space into the kernel for phyio operations. 95 * One page is enough to handle 4Mb of simultaneous raw IO operations. 96 */ 97 #ifndef USRIOSIZE 98 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 99 #endif 100 101 /* 102 * PTEs for system V style shared memory. 103 * This is basically slop for kmempt which we actually allocate (malloc) from. 104 */ 105 #ifndef SHMMAXPGS 106 #define SHMMAXPGS 1024 /* 4mb */ 107 #endif 108 109 /* 110 * Mach derived constants 111 */ 112 113 /* user/kernel map constants */ 114 #define VM_MIN_ADDRESS ((vaddr_t)0) 115 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFFD000) 116 #define VM_MAX_ADDRESS ((vaddr_t)0xFFFFD000) 117 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 118 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 119 120 /* virtual sizes (bytes) for various kernel submaps */ 121 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 122 123 /* # of kernel PT pages (initial only, can grow dynamically) */ 124 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 125 126 /* 127 * Constants which control the way the VM system deals with memory segments. 128 */ 129 #define VM_PHYSSEG_MAX 3 130 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 131 /* Actually VM_PSTRAT_UPPERFIRST is needed */ 132 #define VM_PHYSSEG_NOADD 133 134 #define VM_NFREELIST 1 135 #define VM_FREELIST_DEFAULT 0 136 137 #define __HAVE_PMAP_PHYSSEG 138 139 /* 140 * pmap-specific data stored in the vm_physmem[] array. 141 */ 142 struct pmap_physseg { 143 struct pv_entry *pvent; /* pv table for this seg */ 144 char *attrs; /* page attributes for this seg */ 145 }; 146 147 #endif /* _X68K_VMPARAM_H_ */ 148