1 /* $NetBSD: vmparam.h,v 1.29 2005/12/11 12:16:16 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 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 and Ralph Campbell. 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) 4/22/94 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 and Ralph Campbell. 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) 4/22/94 77 */ 78 79 #ifndef _ALPHA_VMPARAM_H_ 80 #define _ALPHA_VMPARAM_H_ 81 82 /* 83 * Machine dependent constants for Alpha. 84 */ 85 86 /* 87 * All systypes currently supported by NetBSD/alpha have an 8K pages. 88 * Override the PAGE_* definitions to be compile-time constants. 89 */ 90 #define PAGE_SHIFT 13 91 #define PAGE_SIZE (1 << PAGE_SHIFT) 92 #define PAGE_MASK (PAGE_SIZE - 1) 93 94 /* 95 * USRSTACK is the top (end) of the user stack. 96 * 97 * Digital UNIX (formerly DEC OSF/1) places the stack below the 98 * text segment (i.e. growing downward from 4G). We may want to 99 * consider doing that at some point, but it might require changes 100 * to the exec code. 101 */ 102 #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */ 103 104 /* 105 * Virtual memory related constants, all in bytes 106 */ 107 #ifndef MAXTSIZ 108 #define MAXTSIZ (1<<30) /* max text size (1G) */ 109 #endif 110 #ifndef DFLDSIZ 111 #define DFLDSIZ (1<<28) /* initial data size (256M) */ 112 #endif 113 #ifndef MAXDSIZ 114 #define MAXDSIZ (1<<30) /* max data size (1G) */ 115 #endif 116 #ifndef DFLSSIZ 117 #define DFLSSIZ (1<<21) /* initial stack size (2M) */ 118 #endif 119 #ifndef MAXSSIZ 120 #define MAXSSIZ (1<<25) /* max stack size (32M) */ 121 #endif 122 123 /* 124 * PTEs for mapping user space into the kernel for phyio operations. 125 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 126 */ 127 #ifndef USRIOSIZE 128 #define USRIOSIZE 64 129 #endif 130 131 /* 132 * PTEs for system V style shared memory. 133 * This is basically slop for kmempt which we actually allocate (malloc) from. 134 */ 135 #ifndef SHMMAXPGS 136 #define SHMMAXPGS 1024 /* 8mb */ 137 #endif 138 139 /* 140 * Mach derived constants 141 */ 142 143 /* user/kernel map constants */ 144 #define VM_MIN_ADDRESS ((vaddr_t)ALPHA_USEG_BASE) /* 0 */ 145 #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */ 146 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 147 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE) 148 #define VM_MAX_KERNEL_ADDRESS trunc_page((vaddr_t)ALPHA_K1SEG_END) 149 150 /* virtual sizes (bytes) for various kernel submaps */ 151 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 152 153 /* some Alpha-specific constants */ 154 #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */ 155 156 #define VM_PHYSSEG_MAX 16 /* XXX */ 157 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 158 #define VM_PHYSSEG_NOADD /* no more after vm_mem_init */ 159 160 #define VM_NFREELIST 1 161 #define VM_FREELIST_DEFAULT 0 162 163 /* 164 * pmap-specific data store in the vm_page structure. 165 */ 166 #define __HAVE_VM_PAGE_MD 167 struct vm_page_md { 168 struct pv_entry *pvh_list; /* pv_entry list */ 169 struct simplelock pvh_slock; /* lock on this head */ 170 int pvh_attrs; /* page attributes */ 171 }; 172 173 #define VM_MDPAGE_INIT(pg) \ 174 do { \ 175 (pg)->mdpage.pvh_list = NULL; \ 176 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 177 } while (/*CONSTCOND*/0) 178 179 #endif /* ! _ALPHA_VMPARAM_H_ */ 180