vmparam.h revision 1.9
1/* $NetBSD: vmparam.h,v 1.9 2003/08/07 16:28:07 agc Exp $ */ 2 3/* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 36 * 37 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 38 */ 39/* 40 * Copyright (c) 1988 University of Utah. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 75 * 76 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 77 */ 78 79#ifndef _MACHINE_VMPARAM_H_ 80#define _MACHINE_VMPARAM_H_ 81 82/* 83 * We use 4K pages on the hp300. Override the PAGE_* definitions 84 * to be compile-time constants. 85 */ 86#define PAGE_SHIFT 12 87#define PAGE_SIZE (1 << PAGE_SHIFT) 88#define PAGE_MASK (PAGE_SIZE - 1) 89 90/* 91 * USRSTACK is the top (end) of the user stack. 92 */ 93#define USRSTACK VM_MAXUSER_ADDRESS 94 95/* 96 * Virtual memory related constants, all in bytes 97 */ 98#ifndef MAXTSIZ 99#define MAXTSIZ (8*1024*1024) /* max text size */ 100#endif 101#ifndef DFLDSIZ 102#define DFLDSIZ (16*1024*1024) /* initial data size limit */ 103#endif 104#ifndef MAXDSIZ 105#define MAXDSIZ (64*1024*1024) /* max data size */ 106#endif 107#ifndef DFLSSIZ 108#define DFLSSIZ (512*1024) /* initial stack size limit */ 109#endif 110#ifndef MAXSSIZ 111#define MAXSSIZ MAXDSIZ /* max stack size */ 112#endif 113 114/* 115 * Sizes of the system and user portions of the system page table. 116 */ 117/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 118#define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 119#define USRPTSIZE (1 * NPTEPG) /* 4mb */ 120 121/* 122 * PTEs for mapping user space into the kernel for phyio operations. 123 * One page is enough to handle 4Mb of simultaneous raw IO operations. 124 */ 125#ifndef USRIOSIZE 126#define USRIOSIZE (1 * NPTEPG) /* 4mb */ 127#endif 128 129/* 130 * PTEs for system V style shared memory. 131 * This is basically slop for kmempt which we actually allocate (malloc) from. 132 */ 133#ifndef SHMMAXPGS 134#define SHMMAXPGS 1024 /* 8mb */ 135#endif 136 137/* 138 * Mach derived constants 139 */ 140 141/* user/kernel map constants */ 142#define VM_MIN_ADDRESS ((vaddr_t)0) 143#define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFC0000) 144#define VM_MAX_ADDRESS ((vaddr_t)0xFFFC0000) 145#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 146#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE)) 147 148/* virtual sizes (bytes) for various kernel submaps */ 149#define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES) 150#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 151 152/* # of kernel PT pages (initial only, can grow dynamically) */ 153#define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 154 155/* 156 * Constants which control the way the VM system deals with memory segments. 157 * Only one physical contigous memory segment. 158 */ 159#define VM_PHYSSEG_MAX 1 160#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 161#define VM_PHYSSEG_NOADD 162 163#define VM_NFREELIST 1 164#define VM_FREELIST_DEFAULT 0 165 166#define __HAVE_PMAP_PHYSSEG 167 168/* 169 * pmap-specific data stored in the vm_physmem[] array. 170 */ 171struct pmap_physseg { 172 struct pv_entry *pvent; /* pv table for this seg */ 173 char *attrs; /* page attributes for this seg */ 174}; 175 176#endif /* _MACHINE_VMPARAM_H_ */ 177