1 /* $NetBSD: vmparam.h,v 1.5 2001/11/15 18:06:14 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 _MACHINE_VMPARAM_H_ 46 #define _MACHINE_VMPARAM_H_ 47 48 /* 49 * USRTEXT is the start of the user text/data space, while USRSTACK 50 * is the top (end) of the user stack. 51 */ 52 #define USRTEXT 8192 53 #define USRSTACK VM_MAXUSER_ADDRESS 54 55 /* 56 * Virtual memory related constants, all in bytes 57 */ 58 #ifndef MAXTSIZ 59 #define MAXTSIZ (8*1024*1024) /* max text size */ 60 #endif 61 #ifndef DFLDSIZ 62 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 63 #endif 64 #ifndef MAXDSIZ 65 #define MAXDSIZ (64*1024*1024) /* max data size */ 66 #endif 67 #ifndef DFLSSIZ 68 #define DFLSSIZ (512*1024) /* initial stack size limit */ 69 #endif 70 #ifndef MAXSSIZ 71 #define MAXSSIZ MAXDSIZ /* max stack size */ 72 #endif 73 74 /* 75 * Sizes of the system and user portions of the system page table. 76 */ 77 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 78 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 79 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 80 81 /* 82 * PTEs for mapping user space into the kernel for phyio operations. 83 * One page is enough to handle 4Mb of simultaneous raw IO operations. 84 */ 85 #ifndef USRIOSIZE 86 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 87 #endif 88 89 /* 90 * PTEs for system V style shared memory. 91 * This is basically slop for kmempt which we actually allocate (malloc) from. 92 */ 93 #ifndef SHMMAXPGS 94 #define SHMMAXPGS 1024 /* 8mb */ 95 #endif 96 97 /* 98 * Mach derived constants 99 */ 100 101 /* user/kernel map constants */ 102 #define VM_MIN_ADDRESS ((vaddr_t)0) 103 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFC0000) 104 #define VM_MAX_ADDRESS ((vaddr_t)0xFFFC0000) 105 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 106 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG)) 107 108 /* virtual sizes (bytes) for various kernel submaps */ 109 #define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES) 110 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 111 112 /* # of kernel PT pages (initial only, can grow dynamically) */ 113 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 114 115 /* 116 * Constants which control the way the VM system deals with memory segments. 117 * Only one physical contigous memory segment. 118 */ 119 #define VM_PHYSSEG_MAX 1 120 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 121 #define VM_PHYSSEG_NOADD 122 123 #define VM_NFREELIST 1 124 #define VM_FREELIST_DEFAULT 0 125 126 #define __HAVE_PMAP_PHYSSEG 127 128 /* 129 * pmap-specific data stored in the vm_physmem[] array. 130 */ 131 struct pmap_physseg { 132 struct pv_entry *pvent; /* pv table for this seg */ 133 char *attrs; /* page attributes for this seg */ 134 }; 135 136 #endif /* _MACHINE_VMPARAM_H_ */ 137