| 1 | /* $NetBSD: uvm_init.c,v 1.46 2015/04/03 01:03:42 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1997 Charles D. Cranor and Washington University. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | * |
| 27 | * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * uvm_init.c: init the vm system. |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: uvm_init.c,v 1.46 2015/04/03 01:03:42 riastradh Exp $" ); |
| 36 | |
| 37 | #include <sys/param.h> |
| 38 | #include <sys/systm.h> |
| 39 | #include <sys/debug.h> |
| 40 | #include <sys/file.h> |
| 41 | #include <sys/filedesc.h> |
| 42 | #include <sys/resourcevar.h> |
| 43 | #include <sys/kmem.h> |
| 44 | #include <sys/mman.h> |
| 45 | #include <sys/vnode.h> |
| 46 | |
| 47 | #include <uvm/uvm.h> |
| 48 | #include <uvm/uvm_pdpolicy.h> |
| 49 | #include <uvm/uvm_readahead.h> |
| 50 | |
| 51 | /* |
| 52 | * struct uvm: we store most global vars in this structure to make them |
| 53 | * easier to spot... |
| 54 | */ |
| 55 | |
| 56 | struct uvm uvm; /* decl */ |
| 57 | struct uvmexp uvmexp; /* decl */ |
| 58 | struct uvm_object *uvm_kernel_object; |
| 59 | |
| 60 | #if defined(__uvmexp_pagesize) |
| 61 | const int * const uvmexp_pagesize = &uvmexp.pagesize; |
| 62 | const int * const uvmexp_pagemask = &uvmexp.pagemask; |
| 63 | const int * const uvmexp_pageshift = &uvmexp.pageshift; |
| 64 | #endif |
| 65 | |
| 66 | kmutex_t uvm_pageqlock; |
| 67 | kmutex_t uvm_fpageqlock; |
| 68 | kmutex_t uvm_kentry_lock; |
| 69 | kmutex_t uvm_swap_data_lock; |
| 70 | |
| 71 | /* |
| 72 | * uvm_init: init the VM system. called from kern/init_main.c. |
| 73 | */ |
| 74 | |
| 75 | void |
| 76 | uvm_init(void) |
| 77 | { |
| 78 | vaddr_t kvm_start, kvm_end; |
| 79 | |
| 80 | /* |
| 81 | * Ensure that the hardware set the page size, zero the UVM structure. |
| 82 | */ |
| 83 | |
| 84 | if (uvmexp.pagesize == 0) { |
| 85 | panic("uvm_init: page size not set" ); |
| 86 | } |
| 87 | |
| 88 | memset(&uvm, 0, sizeof(uvm)); |
| 89 | averunnable.fscale = FSCALE; |
| 90 | |
| 91 | /* |
| 92 | * Init the page sub-system. This includes allocating the vm_page |
| 93 | * structures, and setting up all the page queues (and locks). |
| 94 | * Available memory will be put in the "free" queue, kvm_start and |
| 95 | * kvm_end will be set to the area of kernel virtual memory which |
| 96 | * is available for general use. |
| 97 | */ |
| 98 | |
| 99 | uvm_page_init(&kvm_start, &kvm_end); |
| 100 | |
| 101 | /* |
| 102 | * Init the map sub-system. |
| 103 | */ |
| 104 | |
| 105 | uvm_map_init(); |
| 106 | |
| 107 | /* |
| 108 | * Setup the kernel's virtual memory data structures. This includes |
| 109 | * setting up the kernel_map/kernel_object. |
| 110 | * Bootstrap all kernel memory allocators. |
| 111 | */ |
| 112 | |
| 113 | uao_init(); |
| 114 | uvm_km_bootstrap(kvm_start, kvm_end); |
| 115 | |
| 116 | /* |
| 117 | * Setup uvm_map caches and init the amap. |
| 118 | */ |
| 119 | |
| 120 | uvm_map_init_caches(); |
| 121 | uvm_amap_init(); |
| 122 | |
| 123 | /* |
| 124 | * Init the pmap module. The pmap module is free to allocate |
| 125 | * memory for its private use (e.g. pvlists). |
| 126 | */ |
| 127 | |
| 128 | pmap_init(); |
| 129 | |
| 130 | /* |
| 131 | * Make kernel memory allocators ready for use. |
| 132 | * After this call the pool/kmem memory allocators can be used. |
| 133 | */ |
| 134 | |
| 135 | uvm_km_init(); |
| 136 | #ifdef __HAVE_PMAP_PV_TRACK |
| 137 | pmap_pv_init(); |
| 138 | #endif |
| 139 | |
| 140 | #ifdef DEBUG |
| 141 | debug_init(); |
| 142 | #endif |
| 143 | |
| 144 | /* |
| 145 | * Init all pagers and the pager_map. |
| 146 | */ |
| 147 | |
| 148 | uvm_pager_init(); |
| 149 | |
| 150 | /* |
| 151 | * Initialize the uvm_loan() facility. |
| 152 | */ |
| 153 | |
| 154 | uvm_loan_init(); |
| 155 | |
| 156 | /* |
| 157 | * Init emap subsystem. |
| 158 | */ |
| 159 | |
| 160 | uvm_emap_sysinit(); |
| 161 | |
| 162 | /* |
| 163 | * The VM system is now up! Now that kmem is up we can resize the |
| 164 | * <obj,off> => <page> hash table for general use and enable paging |
| 165 | * of kernel objects. |
| 166 | */ |
| 167 | |
| 168 | uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, |
| 169 | UAO_FLAG_KERNSWAP); |
| 170 | |
| 171 | uvmpdpol_reinit(); |
| 172 | |
| 173 | /* |
| 174 | * Init anonymous memory systems. |
| 175 | */ |
| 176 | |
| 177 | uvm_anon_init(); |
| 178 | |
| 179 | uvm_uarea_init(); |
| 180 | |
| 181 | /* |
| 182 | * Init readahead mechanism. |
| 183 | */ |
| 184 | |
| 185 | uvm_ra_init(); |
| 186 | } |
| 187 | |