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,
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14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
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18 * The Original Code and all software distributed under the License are
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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 <sys/kdebug.h>
72#include <vm/vm_object.h>
73#include <vm/vm_map.h>
74#include <vm/vm_page.h>
75#include <vm/vm_kern.h>
76#include <vm/memory_object.h>
77#include <vm/vm_fault.h>
78#include <vm/vm_init.h>
79
80#include <pexpert/pexpert.h>
81
82#include <vm/vm_protos.h>
83
84#define ZONE_MAP_MIN CONFIG_ZONE_MAP_MIN
85
86/* Maximum zone size is 1.5G */
87#define ZONE_MAP_MAX (1024 * 1024 * 1536)
88
89const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
90const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
91
92boolean_t vm_kernel_ready = FALSE;
93boolean_t kmem_ready = FALSE;
94boolean_t kmem_alloc_ready = FALSE;
95boolean_t zlog_ready = FALSE;
96
97vm_offset_t kmapoff_kaddr;
98unsigned int kmapoff_pgcnt;
99
100static inline void
101vm_mem_bootstrap_log(const char *message)
102{
103//	kprintf("vm_mem_bootstrap: %s\n", message);
104	kernel_debug_string(message);
105}
106
107/*
108 *	vm_mem_bootstrap initializes the virtual memory system.
109 *	This is done only by the first cpu up.
110 */
111
112void
113vm_mem_bootstrap(void)
114{
115	vm_offset_t	start, end;
116	vm_size_t zsizearg;
117	mach_vm_size_t zsize;
118
119	/*
120	 *	Initializes resident memory structures.
121	 *	From here on, all physical memory is accounted for,
122	 *	and we use only virtual addresses.
123	 */
124	vm_mem_bootstrap_log("vm_page_bootstrap");
125	vm_page_bootstrap(&start, &end);
126
127	/*
128	 *	Initialize other VM packages
129	 */
130
131	vm_mem_bootstrap_log("zone_bootstrap");
132	zone_bootstrap();
133
134	vm_mem_bootstrap_log("vm_object_bootstrap");
135	vm_object_bootstrap();
136
137	vm_kernel_ready = TRUE;
138
139	vm_mem_bootstrap_log("vm_map_init");
140	vm_map_init();
141
142	vm_mem_bootstrap_log("kmem_init");
143	kmem_init(start, end);
144	kmem_ready = TRUE;
145	/*
146	 * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
147	 * stack addresses. (With a 4K page and 9 bits of randomness, this
148	 * eats at most 2M of VA from the map.)
149	 */
150	if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt,
151	    sizeof (kmapoff_pgcnt)))
152		kmapoff_pgcnt = early_random() & 0x1ff;	/* 9 bits */
153
154	if (kmapoff_pgcnt > 0 &&
155	    vm_allocate(kernel_map, &kmapoff_kaddr,
156	    kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE) != KERN_SUCCESS)
157		panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt);
158
159	vm_mem_bootstrap_log("pmap_init");
160	pmap_init();
161
162	kmem_alloc_ready = TRUE;
163
164	if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg)))
165		zsize = zsizearg * 1024ULL * 1024ULL;
166	else {
167		zsize = sane_size >> 2;				/* Get target zone size as 1/4 of physical memory */
168	}
169
170	if (zsize < ZONE_MAP_MIN)
171		zsize = ZONE_MAP_MIN;	/* Clamp to min */
172#if defined(__LP64__)
173	zsize += zsize >> 1;
174#endif  /* __LP64__ */
175	if (zsize > sane_size >> 1)
176		zsize = sane_size >> 1;	/* Clamp to half of RAM max */
177#if !__LP64__
178	if (zsize > ZONE_MAP_MAX)
179		zsize = ZONE_MAP_MAX;	/* Clamp to 1.5GB max for K32 */
180#endif /* !__LP64__ */
181
182	vm_mem_bootstrap_log("kext_alloc_init");
183	kext_alloc_init();
184
185	vm_mem_bootstrap_log("zone_init");
186	assert((vm_size_t) zsize == zsize);
187	zone_init((vm_size_t) zsize);	/* Allocate address space for zones */
188
189	/* The vm_page_zone must be created prior to kalloc_init; that
190	 * routine can trigger zalloc()s (for e.g. mutex statistic structure
191	 * initialization). The vm_page_zone must exist to saisfy fictitious
192	 * page allocations (which are used for guard pages by the guard
193	 * mode zone allocator).
194	 */
195	vm_mem_bootstrap_log("vm_page_module_init");
196	vm_page_module_init();
197
198	vm_mem_bootstrap_log("kalloc_init");
199	kalloc_init();
200
201	vm_mem_bootstrap_log("vm_fault_init");
202	vm_fault_init();
203
204	vm_mem_bootstrap_log("memory_manager_default_init");
205	memory_manager_default_init();
206
207	vm_mem_bootstrap_log("memory_object_control_bootstrap");
208	memory_object_control_bootstrap();
209
210	vm_mem_bootstrap_log("device_pager_bootstrap");
211	device_pager_bootstrap();
212
213	vm_paging_map_init();
214
215	vm_mem_bootstrap_log("vm_mem_bootstrap done");
216}
217
218void
219vm_mem_init(void)
220{
221	vm_object_init();
222}
223