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#define PAGE_SIZE I386_PGBYTES
99#define PAGE_SHIFT I386_PGSHIFT
100#define PAGE_MASK (PAGE_SIZE - 1)
101
102#define PAGE_MAX_SHIFT PAGE_SHIFT
103#define PAGE_MAX_SIZE PAGE_SIZE
104#define PAGE_MAX_MASK PAGE_MASK
105
106#define PAGE_MIN_SHIFT PAGE_SHIFT
107#define PAGE_MIN_SIZE PAGE_SIZE
108#define PAGE_MIN_MASK PAGE_MASK
109
110#define I386_LPGBYTES 2*1024*1024 /* bytes per large page */
111#define I386_LPGSHIFT 21 /* bitshift for large pages */
112#define I386_LPGMASK (I386_LPGBYTES-1)
113
114/*
115 * Convert bytes to pages and convert pages to bytes.
116 * No rounding is used.
117 */
118
119#define i386_btop(x) ((ppnum_t)((x) >> I386_PGSHIFT))
120#define machine_btop(x) i386_btop(x)
121#define i386_ptob(x) (((pmap_paddr_t)(x)) << I386_PGSHIFT)
122#define machine_ptob(x) i386_ptob(x)
123
124/*
125 * Round off or truncate to the nearest page. These will work
126 * for either addresses or counts. (i.e. 1 byte rounds to 1 page
127 * bytes.
128 */
129
130#define i386_round_page(x) ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \
131 ~(I386_PGBYTES-1))
132#define i386_trunc_page(x) (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1))
133
134
135
136#define VM_MIN_ADDRESS64 ((user_addr_t) 0x0000000000000000ULL)
137/*
138 * default top of user stack... it grows down from here
139 */
140#define VM_USRSTACK64 ((user_addr_t) 0x00007FFEEFC00000ULL)
141
142/*
143 * XXX TODO: Obsolete?
144 */
145#define VM_DYLD64 ((user_addr_t) 0x00007FFF5FC00000ULL)
146#define VM_LIB64_SHR_DATA ((user_addr_t) 0x00007FFF60000000ULL)
147#define VM_LIB64_SHR_TEXT ((user_addr_t) 0x00007FFF80000000ULL)
148/*
149 * the end of the usable user address space , for now about 47 bits.
150 * the 64 bit commpage is past the end of this
151 */
152#define VM_MAX_PAGE_ADDRESS ((user_addr_t) 0x00007FFFFFE00000ULL)
153/*
154 * canonical end of user address space for limits checking
155 */
156#define VM_MAX_USER_PAGE_ADDRESS ((user_addr_t)0x00007FFFFFFFF000ULL)
157
158
159/* system-wide values */
160#define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) 0)
161#define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) VM_MAX_PAGE_ADDRESS)
162
163/* process-relative values (all 32-bit legacy only for now) */
164#define VM_MIN_ADDRESS ((vm_offset_t) 0)
165#define VM_USRSTACK32 ((vm_offset_t) 0xC0000000) /* ASLR slides stack down by up to 1 MB */
166#define VM_MAX_ADDRESS ((vm_offset_t) 0xFFE00000)
167
168
169#ifdef KERNEL_PRIVATE
170
171#define TEST_PAGE_SIZE_16K FALSE
172#define TEST_PAGE_SIZE_4K TRUE
173
174/* Kernel-wide values */
175
176#define KB (1024ULL)
177#define MB (1024*KB)
178#define GB (1024*MB)
179
180/*
181 * Maximum physical memory supported.
182 */
183#define K32_MAXMEM (32*GB)
184#define K64_MAXMEM (252*GB)
185#define KERNEL_MAXMEM K64_MAXMEM
186
187/*
188 * XXX
189 * The kernel max VM address is limited to 0xFF3FFFFF for now because
190 * some data structures are explicitly allocated at 0xFF400000 without
191 * VM's knowledge (see osfmk/i386/locore.s for the allocation of PTmap and co.).
192 * We can't let VM allocate memory from there.
193 */
194
195
196#define KERNEL_IMAGE_TO_PHYS(x) (x)
197#define VM_KERNEL_POINTER_SIGNIFICANT_BITS 39
198#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0xFFFFFF8000000000UL)
199#define VM_MIN_KERNEL_PAGE ((ppnum_t)0)
200#define VM_MIN_KERNEL_AND_KEXT_ADDRESS (VM_MIN_KERNEL_ADDRESS - 0x80000000ULL)
201#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0xFFFFFFFFFFFFEFFFUL)
202#define VM_MAX_KERNEL_ADDRESS_EFI32 ((vm_offset_t) 0xFFFFFF80FFFFEFFFUL)
203#define KEXT_ALLOC_MAX_OFFSET (2 * 1024 * 1024 * 1024UL)
204#define KEXT_ALLOC_BASE(x) ((x) - KEXT_ALLOC_MAX_OFFSET)
205#define KEXT_ALLOC_SIZE(x) (KEXT_ALLOC_MAX_OFFSET - (x))
206
207#define VM_KERNEL_STRIP_PTR(_v) (_v)
208
209#define VM_KERNEL_ADDRESS(va) ((((vm_address_t)(va))>=VM_MIN_KERNEL_AND_KEXT_ADDRESS) && \
210 (((vm_address_t)(va))<=VM_MAX_KERNEL_ADDRESS))
211
212#define VM_MAP_MIN_ADDRESS MACH_VM_MIN_ADDRESS
213#define VM_MAP_MAX_ADDRESS MACH_VM_MAX_ADDRESS
214
215/* FIXME - always leave like this? */
216#if KASAN
217/* Increase the stack sizes to account for the redzones that get added to every
218 * stack object. */
219# define INTSTACK_SIZE (I386_PGBYTES*4*4)
220# define KERNEL_STACK_SIZE (I386_PGBYTES*4*4)
221#elif DEBUG
222# define INTSTACK_SIZE (I386_PGBYTES*4)
223# define KERNEL_STACK_SIZE (I386_PGBYTES*6)
224#else
225# define INTSTACK_SIZE (I386_PGBYTES*4)
226# define KERNEL_STACK_SIZE (I386_PGBYTES*4)
227#endif
228
229#ifdef MACH_KERNEL_PRIVATE
230
231/* For implementing legacy 32-bit interfaces */
232#define VM32_SUPPORT 1
233#define VM32_MIN_ADDRESS ((vm32_offset_t) 0)
234#define VM32_MAX_ADDRESS ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF))
235
236/*
237 * kalloc() parameters:
238 *
239 * Historically kalloc's underlying zones were power-of-2 sizes, with a
240 * KALLOC_MINSIZE of 16 bytes. The allocator ensured that
241 * (sizeof == alignof) >= 16 for all kalloc allocations.
242 *
243 * Today kalloc may use zones with intermediate sizes, constrained by
244 * KALLOC_MINSIZE and a minimum alignment, expressed by KALLOC_LOG2_MINALIGN.
245 *
246 * The common alignment for LP64 is for longs and pointers i.e. 8 bytes.
247 */
248
249
250#define KALLOC_MINSIZE 16 /* minimum allocation size */
251#define KALLOC_LOG2_MINALIGN 4 /* log2 minimum alignment */
252
253#define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0x00000000)
254
255#define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0xFFFFFF8000000000UL)
256#define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0xFFFFFF801FFFFFFFUL)
257
258#define NCOPY_WINDOWS 0
259
260
261
262/*
263 * Conversion between 80386 pages and VM pages
264 */
265
266#define trunc_i386_to_vm(p) (atop(trunc_page(i386_ptob(p))))
267#define round_i386_to_vm(p) (atop(round_page(i386_ptob(p))))
268#define vm_to_i386(p) (i386_btop(ptoa(p)))
269
270
271#define PMAP_SET_CACHE_ATTR(mem, object, cache_attr, batch_pmap_op) \
272 MACRO_BEGIN \
273 pmap_set_cache_attributes(VM_PAGE_GET_PHYS_PAGE(mem), (cache_attr)); \
274 (object)->set_cache_attr = TRUE; \
275 (void) batch_pmap_op; \
276 MACRO_END
277
278#define PMAP_BATCH_SET_CACHE_ATTR(object, user_page_list, cache_attr, num_pages, batch_pmap_op)\
279 MACRO_BEGIN \
280 (void) user_page_list; \
281 (void) num_pages; \
282 (void) batch_pmap_op; \
283 MACRO_END
284
285#define IS_USERADDR64_CANONICAL(addr) \
286 ((addr) < (VM_MAX_USER_PAGE_ADDRESS))
287
288#endif /* MACH_KERNEL_PRIVATE */
289
290#endif /* KERNEL_PRIVATE */
291
292#endif /* _MACH_I386_VM_PARAM_H_ */
293