1/* 2 * Copyright (c) 2000-2012 Apple 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#ifdef PRIVATE 99#define KERNEL_PAGE_SIZE I386_PGBYTES 100#define KERNEL_PAGE_SHIFT I386_PGSHIFT 101#define KERNEL_PAGE_MASK (KERNEL_PAGE_SIZE-1) 102#endif 103 104#define PAGE_SIZE I386_PGBYTES 105#define PAGE_SHIFT I386_PGSHIFT 106#define PAGE_MASK (PAGE_SIZE - 1) 107 108#define I386_LPGBYTES 2*1024*1024 /* bytes per large page */ 109#define I386_LPGSHIFT 21 /* bitshift for large pages */ 110#define I386_LPGMASK (I386_LPGBYTES-1) 111 112/* 113 * Convert bytes to pages and convert pages to bytes. 114 * No rounding is used. 115 */ 116 117#define i386_btop(x) ((ppnum_t)((x) >> I386_PGSHIFT)) 118#define machine_btop(x) i386_btop(x) 119#define i386_ptob(x) (((pmap_paddr_t)(x)) << I386_PGSHIFT) 120#define machine_ptob(x) i386_ptob(x) 121 122/* 123 * Round off or truncate to the nearest page. These will work 124 * for either addresses or counts. (i.e. 1 byte rounds to 1 page 125 * bytes. 126 */ 127 128#define i386_round_page(x) ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \ 129 ~(I386_PGBYTES-1)) 130#define i386_trunc_page(x) (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1)) 131 132 133 134#define VM_MIN_ADDRESS64 ((user_addr_t) 0x0000000000000000ULL) 135/* 136 * default top of user stack... it grows down from here 137 */ 138#define VM_USRSTACK64 ((user_addr_t) 0x00007FFF5FC00000ULL) 139#define VM_DYLD64 ((user_addr_t) 0x00007FFF5FC00000ULL) 140#define VM_LIB64_SHR_DATA ((user_addr_t) 0x00007FFF60000000ULL) 141#define VM_LIB64_SHR_TEXT ((user_addr_t) 0x00007FFF80000000ULL) 142/* 143 * the end of the usable user address space , for now about 47 bits. 144 * the 64 bit commpage is past the end of this 145 */ 146#define VM_MAX_PAGE_ADDRESS ((user_addr_t) 0x00007FFFFFE00000ULL) 147/* 148 * canonical end of user address space for limits checking 149 */ 150#define VM_MAX_USER_PAGE_ADDRESS ((user_addr_t)0x00007FFFFFFFF000ULL) 151 152 153/* system-wide values */ 154#define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) 0) 155#define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) VM_MAX_PAGE_ADDRESS) 156 157/* process-relative values (all 32-bit legacy only for now) */ 158#define VM_MIN_ADDRESS ((vm_offset_t) 0) 159#define VM_USRSTACK32 ((vm_offset_t) 0xC0000000) /* ASLR slides stack down by up to 1 MB */ 160#define VM_MAX_ADDRESS ((vm_offset_t) 0xFFE00000) 161 162 163#ifdef KERNEL_PRIVATE 164 165/* Kernel-wide values */ 166 167#define KB (1024ULL) 168#define MB (1024*KB) 169#define GB (1024*MB) 170 171/* 172 * Maximum physical memory supported. 173 */ 174#define K32_MAXMEM (32*GB) 175#define K64_MAXMEM (128*GB) 176#define KERNEL_MAXMEM K64_MAXMEM 177 178/* 179 * XXX 180 * The kernel max VM address is limited to 0xFF3FFFFF for now because 181 * some data structures are explicitly allocated at 0xFF400000 without 182 * VM's knowledge (see osfmk/i386/locore.s for the allocation of PTmap and co.). 183 * We can't let VM allocate memory from there. 184 */ 185 186 187#define KERNEL_IMAGE_TO_PHYS(x) (x) 188#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0xFFFFFF8000000000UL) 189#define VM_MIN_KERNEL_PAGE ((ppnum_t)0) 190#define VM_MIN_KERNEL_AND_KEXT_ADDRESS (VM_MIN_KERNEL_ADDRESS - 0x80000000ULL) 191#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0xFFFFFFFFFFFFEFFFUL) 192#define VM_MAX_KERNEL_ADDRESS_EFI32 ((vm_offset_t) 0xFFFFFF80FFFFEFFFUL) 193#define KEXT_ALLOC_MAX_OFFSET (2 * 1024 * 1024 * 1024UL) 194#define KEXT_ALLOC_BASE(x) ((x) - KEXT_ALLOC_MAX_OFFSET) 195#define KEXT_ALLOC_SIZE(x) (KEXT_ALLOC_MAX_OFFSET - (x)) 196 197 198#define KERNEL_STACK_SIZE (I386_PGBYTES*4) 199 200#define VM_MAP_MIN_ADDRESS MACH_VM_MIN_ADDRESS 201#define VM_MAP_MAX_ADDRESS MACH_VM_MAX_ADDRESS 202 203/* FIXME - always leave like this? */ 204#define INTSTACK_SIZE (I386_PGBYTES*4) 205 206#ifdef MACH_KERNEL_PRIVATE 207 208/* For implementing legacy 32-bit interfaces */ 209#define VM32_SUPPORT 1 210#define VM32_MIN_ADDRESS ((vm32_offset_t) 0) 211#define VM32_MAX_ADDRESS ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF)) 212 213/* 214 * kalloc() parameters: 215 * 216 * Historically kalloc's underlying zones were power-of-2 sizes, with a 217 * KALLOC_MINSIZE of 16 bytes. The allocator ensured that 218 * (sizeof == alignof) >= 16 for all kalloc allocations. 219 * 220 * Today kalloc may use zones with intermediate sizes, constrained by 221 * KALLOC_MINSIZE and a minimum alignment, expressed by KALLOC_LOG2_MINALIGN. 222 * 223 * The common alignment for LP64 is for longs and pointers i.e. 8 bytes. 224 */ 225 226 227#define KALLOC_MINSIZE 16 /* minimum allocation size */ 228#define KALLOC_LOG2_MINALIGN 4 /* log2 minimum alignment */ 229 230#define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0x00000000) 231 232#define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0xFFFFFF8000000000UL) 233#define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0xFFFFFF801FFFFFFFUL) 234 235#define NCOPY_WINDOWS 0 236 237 238 239/* 240 * Conversion between 80386 pages and VM pages 241 */ 242 243#define trunc_i386_to_vm(p) (atop(trunc_page(i386_ptob(p)))) 244#define round_i386_to_vm(p) (atop(round_page(i386_ptob(p)))) 245#define vm_to_i386(p) (i386_btop(ptoa(p))) 246 247 248#define PMAP_SET_CACHE_ATTR(mem, object, cache_attr, batch_pmap_op) \ 249 MACRO_BEGIN \ 250 pmap_set_cache_attributes((mem)->phys_page, (cache_attr)); \ 251 (object)->set_cache_attr = TRUE; \ 252 (void) batch_pmap_op; \ 253 MACRO_END 254 255#define PMAP_BATCH_SET_CACHE_ATTR(object, user_page_list, cache_attr, num_pages, batch_pmap_op)\ 256 MACRO_BEGIN \ 257 (void) user_page_list; \ 258 (void) num_pages; \ 259 (void) batch_pmap_op; \ 260 MACRO_END 261 262#define IS_USERADDR64_CANONICAL(addr) \ 263 ((addr) < (VM_MAX_USER_PAGE_ADDRESS + PAGE_SIZE)) 264 265#endif /* MACH_KERNEL_PRIVATE */ 266 267#endif /* KERNEL_PRIVATE */ 268 269#endif /* _MACH_I386_VM_PARAM_H_ */ 270