1 /* 2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* 29 * @OSF_COPYRIGHT@ 30 */ 31 /* 32 * Mach Operating System 33 * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56 57 /* 58 * Copyright (c) 1994 The University of Utah and 59 * the Computer Systems Laboratory at the University of Utah (CSL). 60 * All rights reserved. 61 * 62 * Permission to use, copy, modify and distribute this software is hereby 63 * granted provided that (1) source code retains these copyright, permission, 64 * and disclaimer notices, and (2) redistributions including binaries 65 * reproduce the notices in supporting documentation, and (3) all advertising 66 * materials mentioning features or use of this software display the following 67 * acknowledgement: ``This product includes software developed by the 68 * Computer Systems Laboratory at the University of Utah.'' 69 * 70 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 71 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 72 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 73 * 74 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 75 * improvements that they make and grant CSL redistribution rights. 76 * 77 */ 78 79 /* 80 * File: vm_param.h 81 * Author: Avadis Tevanian, Jr. 82 * Date: 1985 83 * 84 * I386 machine dependent virtual memory parameters. 85 * Most of the declarations are preceeded by I386_ (or i386_) 86 * which is OK because only I386 specific code will be using 87 * them. 88 */ 89 90 #ifndef _MACH_I386_VM_PARAM_H_ 91 #define _MACH_I386_VM_PARAM_H_ 92 93 #define BYTE_SIZE 8 /* byte size in bits */ 94 95 #define I386_PGBYTES 4096 /* bytes per 80386 page */ 96 #define I386_PGSHIFT 12 /* bitshift for pages */ 97 98 #define PAGE_SIZE I386_PGBYTES 99 #define PAGE_SHIFT I386_PGSHIFT 100 #define PAGE_MASK (PAGE_SIZE - 1) 101 102 #define I386_LPGBYTES 2*1024*1024 /* bytes per large page */ 103 #define I386_LPGSHIFT 21 /* bitshift for large pages */ 104 #define I386_LPGMASK (I386_LPGBYTES-1) 105 106 /* 107 * Convert bytes to pages and convert pages to bytes. 108 * No rounding is used. 109 */ 110 111 #define i386_btop(x) ((ppnum_t)((x) >> I386_PGSHIFT)) 112 #define machine_btop(x) i386_btop(x) 113 #define i386_ptob(x) (((pmap_paddr_t)(x)) << I386_PGSHIFT) 114 115 /* 116 * Round off or truncate to the nearest page. These will work 117 * for either addresses or counts. (i.e. 1 byte rounds to 1 page 118 * bytes. 119 */ 120 121 #define i386_round_page(x) ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \ 122 ~(I386_PGBYTES-1)) 123 #define i386_trunc_page(x) (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1)) 124 125 126 127 #define VM_MIN_ADDRESS64 ((user_addr_t) 0x0000000000000000ULL) 128 /* 129 * default top of user stack... it grows down from here 130 */ 131 #define VM_USRSTACK64 ((user_addr_t) 0x00007FFF5FC00000ULL) 132 #define VM_DYLD64 ((user_addr_t) 0x00007FFF5FC00000ULL) 133 #define VM_LIB64_SHR_DATA ((user_addr_t) 0x00007FFF60000000ULL) 134 #define VM_LIB64_SHR_TEXT ((user_addr_t) 0x00007FFF80000000ULL) 135 /* 136 * the end of the usable user address space , for now about 47 bits. 137 * the 64 bit commpage is past the end of this 138 */ 139 #define VM_MAX_PAGE_ADDRESS ((user_addr_t) 0x00007FFFFFE00000ULL) 140 /* 141 * canonical end of user address space for limits checking 142 */ 143 #define VM_MAX_USER_PAGE_ADDRESS ((user_addr_t)0x00007FFFFFFFF000ULL) 144 145 146 /* system-wide values */ 147 #define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) 0) 148 #define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) VM_MAX_PAGE_ADDRESS) 149 150 /* process-relative values (all 32-bit legacy only for now) */ 151 #define VM_MIN_ADDRESS ((vm_offset_t) 0) 152 #define VM_USRSTACK32 ((vm_offset_t) 0xC0000000) 153 #define VM_MAX_ADDRESS ((vm_offset_t) 0xFFE00000) 154 155 156 157 #endif /* _MACH_I386_VM_PARAM_H_ */ 158