1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* $OpenBSD: uvm_init.c,v 1.36 2014/12/15 02:24:23 guenther Exp $ */
/* $NetBSD: uvm_init.c,v 1.14 2000/06/27 17:29:23 mrg Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp
*/
/*
* uvm_init.c: init the vm system.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/resourcevar.h>
#include <sys/mman.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/pool.h>
#include <uvm/uvm.h>
#include <uvm/uvm_addr.h>
/*
* struct uvm: we store all global vars in this structure to make them
* easier to spot...
*/
struct uvm uvm; /* decl */
struct uvmexp uvmexp; /* decl */
/*
* local prototypes
*/
/*
* uvm_init: init the VM system. called from kern/init_main.c.
*/
void
uvm_init(void)
{
vaddr_t kvm_start, kvm_end;
/* step 0: ensure that the hardware set the page size */
if (uvmexp.pagesize == 0) {
panic("uvm_init: page size not set");
}
/* step 1: set up stats. */
averunnable.fscale = FSCALE;
/*
* step 2: init the page sub-system. this includes allocating the
* vm_page structures, and setting up all the page queues (and
* locks). available memory will be put in the "free" queue.
* kvm_start and kvm_end will be set to the area of kernel virtual
* memory which is available for general use.
*/
uvm_page_init(&kvm_start, &kvm_end);
/*
* step 3: init the map sub-system. allocates the static pool of
* vm_map_entry structures that are used for "special" kernel maps
* (e.g. kernel_map, kmem_map, etc...).
*/
uvm_map_init();
/*
* step 4: setup the kernel's virtual memory data structures. this
* includes setting up the kernel_map/kernel_object and the kmem_map/
* kmem_object.
*/
uvm_km_init(kvm_start, kvm_end);
/*
* step 4.5: init (tune) the fault recovery code.
*/
uvmfault_init();
/*
* step 5: init the pmap module. the pmap module is free to allocate
* memory for its private use (e.g. pvlists).
*/
pmap_init();
/*
* step 6: init the kernel memory allocator. after this call the
* kernel memory allocator (malloc) can be used.
*/
kmeminit();
/*
* step 6.5: init the dma allocator, which is backed by pools.
*/
dma_alloc_init();
/*
* step 7: init all pagers and the pager_map.
*/
uvm_pager_init();
/*
* step 8: init anonymous memory system
*/
amap_init();
/*
* step 9: init uvm_km_page allocator memory.
*/
uvm_km_page_init();
/*
* the VM system is now up! now that malloc is up we can
* enable paging of kernel objects.
*/
uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
UAO_FLAG_KERNSWAP);
/*
* reserve some unmapped space for malloc/pool use after free usage
*/
#ifdef DEADBEEF0
kvm_start = trunc_page(DEADBEEF0) - PAGE_SIZE;
if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE,
NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(PROT_NONE,
PROT_NONE, MAP_INHERIT_NONE, POSIX_MADV_RANDOM, UVM_FLAG_FIXED)))
panic("uvm_init: cannot reserve dead beef @0x%x", DEADBEEF0);
#endif
#ifdef DEADBEEF1
kvm_start = trunc_page(DEADBEEF1) - PAGE_SIZE;
if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE,
NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(PROT_NONE,
PROT_NONE, MAP_INHERIT_NONE, POSIX_MADV_RANDOM, UVM_FLAG_FIXED)))
panic("uvm_init: cannot reserve dead beef @0x%x", DEADBEEF1);
#endif
/*
* init anonymous memory systems
*/
uvm_anon_init();
#ifndef SMALL_KERNEL
/*
* Switch kernel and kmem_map over to a best-fit allocator,
* instead of walking the tree.
*/
uvm_map_set_uaddr(kernel_map, &kernel_map->uaddr_any[3],
uaddr_bestfit_create(vm_map_min(kernel_map),
vm_map_max(kernel_map)));
uvm_map_set_uaddr(kmem_map, &kmem_map->uaddr_any[3],
uaddr_bestfit_create(vm_map_min(kmem_map),
vm_map_max(kmem_map)));
#endif /* !SMALL_KERNEL */
}
|
