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 /* number of bits to shift for pages */ 97 98#define PAGE_SIZE I386_PGBYTES 99#define PAGE_SHIFT I386_PGSHIFT 100#define PAGE_MASK (PAGE_SIZE - 1) 101 102/* 103 * Convert bytes to pages and convert pages to bytes. 104 * No rounding is used. 105 */ 106 107#define i386_btop(x) (((pmap_paddr_t)(x)) >> I386_PGSHIFT) 108#define machine_btop(x) i386_btop(x) 109#define i386_ptob(x) (((pmap_paddr_t)(x)) << I386_PGSHIFT) 110 111/* 112 * Round off or truncate to the nearest page. These will work 113 * for either addresses or counts. (i.e. 1 byte rounds to 1 page 114 * bytes. 115 */ 116 117#define i386_round_page(x) ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \ 118 ~(I386_PGBYTES-1)) 119#define i386_trunc_page(x) (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1)) 120 121 122 123#define VM_MIN_ADDRESS64 ((user_addr_t) 0x0000000000000000ULL) 124/* 125 * default top of user stack... it grows down from here 126 */ 127#define VM_USRSTACK64 ((user_addr_t) 0x00007FFF5FC00000ULL) 128#define VM_DYLD64 ((user_addr_t) 0x00007FFF5FC00000ULL) 129#define VM_LIB64_SHR_DATA ((user_addr_t) 0x00007FFF60000000ULL) 130#define VM_LIB64_SHR_TEXT ((user_addr_t) 0x00007FFF80000000ULL) 131/* 132 * the end of the usable user address space , for now about 47 bits. 133 * the 64 bit commpage is past the end of this 134 */ 135#define VM_MAX_PAGE_ADDRESS ((user_addr_t) 0x00007FFFFFE00000ULL) 136/* 137 * canonical end of user address space for limits checking 138 */ 139#define VM_MAX_USER_PAGE_ADDRESS ((user_addr_t)0x00007FFFFFFFF000ULL) 140 141 142/* system-wide values */ 143#define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) 0) 144#define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) VM_MAX_PAGE_ADDRESS) 145 146/* process-relative values (all 32-bit legacy only for now) */ 147#define VM_MIN_ADDRESS ((vm_offset_t) 0) 148#define VM_USRSTACK32 ((vm_offset_t) 0xC0000000) 149#define VM_MAX_ADDRESS ((vm_offset_t) 0xFFE00000) 150 151 152#ifdef KERNEL_PRIVATE 153 154/* Kernel-wide values */ 155#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0x00001000U) 156/* 157 * XXX 158 * The kernel max VM address is limited to 0xFF3FFFFF for now because 159 * some data structures are explicitly allocated at 0xFF400000 without 160 * VM's knowledge (see osfmk/i386/locore.s for the allocation of PTmap and co.). 161 * We can't let VM allocate memory from there. 162 */ 163 164#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0xFE7FFFFFU) 165#define KERNEL_STACK_SIZE (I386_PGBYTES*4) 166 167#define VM_MAP_MIN_ADDRESS MACH_VM_MIN_ADDRESS 168#define VM_MAP_MAX_ADDRESS MACH_VM_MAX_ADDRESS 169 170/* FIXME - always leave like this? */ 171#define INTSTACK_SIZE (I386_PGBYTES*4) 172 173#ifdef MACH_KERNEL_PRIVATE 174 175/* For implementing legacy 32-bit interfaces */ 176#define VM32_SUPPORT 177#define VM32_MIN_ADDRESS ((vm32_offset_t) 0) 178#define VM32_MAX_ADDRESS ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF)) 179 180#define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0x00000000) 181 182#define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x00000000U) 183#define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x1fffffffU) 184 185#define NCOPY_WINDOWS 4 186 187/* 188 * Conversion between 80386 pages and VM pages 189 */ 190 191#define trunc_i386_to_vm(p) (atop(trunc_page(i386_ptob(p)))) 192#define round_i386_to_vm(p) (atop(round_page(i386_ptob(p)))) 193#define vm_to_i386(p) (i386_btop(ptoa(p))) 194 195#define PMAP_ENTER(pmap, virtual_address, page, protection, flags, wired) \ 196 MACRO_BEGIN \ 197 pmap_t __pmap = (pmap); \ 198 vm_page_t __page = (page); \ 199 vm_prot_t __prot__ = (protection); \ 200 \ 201 if (__pmap == kernel_pmap) { \ 202 __prot__ |= VM_PROT_WRITE; \ 203 } else { \ 204 assert(!__page->encrypted); \ 205 } \ 206 \ 207 pmap_enter( \ 208 __pmap, \ 209 (virtual_address), \ 210 __page->phys_page, \ 211 __prot__, \ 212 flags, \ 213 (wired) \ 214 ); \ 215 MACRO_END 216 217#define IS_USERADDR64_CANONICAL(addr) \ 218 ((addr) < (VM_MAX_USER_PAGE_ADDRESS + PAGE_SIZE)) 219 220#endif /* MACH_KERNEL_PRIVATE */ 221 222#endif /* KERNEL_PRIVATE */ 223 224#endif /* _MACH_I386_VM_PARAM_H_ */ 225