1/*
2 * Copyright (c) 2000-2011 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) 1991,1990,1989,1988,1987 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/*
59 *	File:	vm/vm_init.c
60 *	Author:	Avadis Tevanian, Jr., Michael Wayne Young
61 *	Date:	1985
62 *
63 *	Initialize the Virtual Memory subsystem.
64 */
65
66#include <mach/machine/vm_types.h>
67#include <mach/vm_map.h>
68#include <kern/zalloc.h>
69#include <kern/kalloc.h>
70#include <kern/kext_alloc.h>
71#include <vm/vm_object.h>
72#include <vm/vm_map.h>
73#include <vm/vm_page.h>
74#include <vm/vm_kern.h>
75#include <vm/memory_object.h>
76#include <vm/vm_fault.h>
77#include <vm/vm_init.h>
78
79#include <pexpert/pexpert.h>
80
81#include <vm/vm_protos.h>
82
83#define ZONE_MAP_MIN CONFIG_ZONE_MAP_MIN
84
85/* Maximum zone size is 1.5G */
86#define ZONE_MAP_MAX (1024 * 1024 * 1536)
87
88const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
89const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
90
91boolean_t vm_kernel_ready = FALSE;
92boolean_t kmem_ready = FALSE;
93boolean_t zlog_ready = FALSE;
94
95vm_offset_t kmapoff_kaddr;
96unsigned int kmapoff_pgcnt;
97
98/*
99 *	vm_mem_bootstrap initializes the virtual memory system.
100 *	This is done only by the first cpu up.
101 */
102
103void
104vm_mem_bootstrap(void)
105{
106	vm_offset_t	start, end;
107	vm_size_t zsizearg;
108	mach_vm_size_t zsize;
109
110	/*
111	 *	Initializes resident memory structures.
112	 *	From here on, all physical memory is accounted for,
113	 *	and we use only virtual addresses.
114	 */
115#define vm_mem_bootstrap_kprintf(x) /* kprintf(x) */
116
117	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_bootstrap\n"));
118	vm_page_bootstrap(&start, &end);
119
120	/*
121	 *	Initialize other VM packages
122	 */
123
124	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_bootstrap\n"));
125	zone_bootstrap();
126
127	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_object_bootstrap\n"));
128	vm_object_bootstrap();
129
130	vm_kernel_ready = TRUE;
131
132	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_map_init\n"));
133	vm_map_init();
134
135	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kmem_init\n"));
136	kmem_init(start, end);
137	kmem_ready = TRUE;
138	/*
139	 * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
140	 * stack addresses. (With a 4K page and 9 bits of randomness, this
141	 * eats at most 2M of VA from the map.)
142	 */
143	kmapoff_pgcnt = 0;
144
145	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling pmap_init\n"));
146	pmap_init();
147
148	zlog_ready = TRUE;
149
150	if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg)))
151		zsize = zsizearg * 1024ULL * 1024ULL;
152	else {
153		zsize = sane_size >> 2;				/* Get target zone size as 1/4 of physical memory */
154	}
155
156	if (zsize < ZONE_MAP_MIN)
157		zsize = ZONE_MAP_MIN;	/* Clamp to min */
158#if defined(__LP64__)
159	zsize += zsize >> 1;
160#endif  /* __LP64__ */
161	if (zsize > sane_size >> 1)
162		zsize = sane_size >> 1;	/* Clamp to half of RAM max */
163#if !__LP64__
164	if (zsize > ZONE_MAP_MAX)
165		zsize = ZONE_MAP_MAX;	/* Clamp to 1.5GB max for K32 */
166#endif /* !__LP64__ */
167
168	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kext_alloc_init\n"));
169	kext_alloc_init();
170
171	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_init\n"));
172	assert((vm_size_t) zsize == zsize);
173	zone_init((vm_size_t) zsize);	/* Allocate address space for zones */
174
175	/* The vm_page_zone must be created prior to kalloc_init; that
176	 * routine can trigger zalloc()s (for e.g. mutex statistic structure
177	 * initialization). The vm_page_zone must exist to saisfy fictitious
178	 * page allocations (which are used for guard pages by the guard
179	 * mode zone allocator).
180	 */
181	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_module_init\n"));
182	vm_page_module_init();
183
184	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kalloc_init\n"));
185	kalloc_init();
186
187	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_fault_init\n"));
188	vm_fault_init();
189
190	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_manager_default_init\n"));
191	memory_manager_default_init();
192
193	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_object_control_bootstrap\n"));
194	memory_object_control_bootstrap();
195
196	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling device_pager_bootstrap\n"));
197	device_pager_bootstrap();
198
199	vm_paging_map_init();
200
201	vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: done\n"));
202}
203
204void
205vm_mem_init(void)
206{
207	vm_object_init();
208}
209