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uvm_init.c revision 1.25.6.1 
      1 /*	$NetBSD: uvm_init.c,v 1.25.6.1 2006/11/18 21:39:50 ad Exp $	*/
      2 
      3 /*
      4  *
      5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Charles D. Cranor and
     19  *      Washington University.
     20  * 4. The name of the author may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  *
     34  * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp
     35  */
     36 
     37 /*
     38  * uvm_init.c: init the vm system.
     39  */
     40 
     41 #include <sys/cdefs.h>
     42 __KERNEL_RCSID(0, "$NetBSD: uvm_init.c,v 1.25.6.1 2006/11/18 21:39:50 ad Exp $");
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/file.h>
     47 #include <sys/filedesc.h>
     48 #include <sys/resourcevar.h>
     49 #include <sys/mman.h>
     50 #include <sys/proc.h>
     51 #include <sys/malloc.h>
     52 #include <sys/vnode.h>
     53 
     54 #include <uvm/uvm.h>
     55 #include <uvm/uvm_pdpolicy.h>
     56 
     57 /*
     58  * struct uvm: we store all global vars in this structure to make them
     59  * easier to spot...
     60  */
     61 
     62 struct uvm uvm;		/* decl */
     63 struct uvmexp uvmexp;	/* decl */
     64 
     65 /*
     66  * local prototypes
     67  */
     68 
     69 /*
     70  * uvm_init: init the VM system.   called from kern/init_main.c.
     71  */
     72 
     73 void
     74 uvm_init(void)
     75 {
     76 	vaddr_t kvm_start, kvm_end;
     77 
     78 	/*
     79 	 * step 0: ensure that the hardware set the page size
     80 	 */
     81 
     82 	if (uvmexp.pagesize == 0) {
     83 		panic("uvm_init: page size not set");
     84 	}
     85 
     86 	/*
     87 	 * step 1: zero the uvm structure
     88 	 */
     89 
     90 	memset(&uvm, 0, sizeof(uvm));
     91 	averunnable.fscale = FSCALE;
     92 
     93 	/*
     94 	 * step 2: init the page sub-system.  this includes allocating the
     95 	 * vm_page structures, and setting up all the page queues (and
     96 	 * locks).  available memory will be put in the "free" queue.
     97 	 * kvm_start and kvm_end will be set to the area of kernel virtual
     98 	 * memory which is available for general use.
     99 	 */
    100 
    101 	uvm_page_init(&kvm_start, &kvm_end);
    102 
    103 	/*
    104 	 * step 3: init the map sub-system.  allocates the static pool of
    105 	 * vm_map_entry structures that are used for "special" kernel maps
    106 	 * (e.g. kernel_map, kmem_map, etc...).
    107 	 */
    108 
    109 	uvm_map_init();
    110 
    111 	/*
    112 	 * step 4: setup the kernel's virtual memory data structures.  this
    113 	 * includes setting up the kernel_map/kernel_object.
    114 	 */
    115 
    116 	uvm_km_init(kvm_start, kvm_end);
    117 
    118 	/*
    119 	 * step 5: init the pmap module.   the pmap module is free to allocate
    120 	 * memory for its private use (e.g. pvlists).
    121 	 */
    122 
    123 	pmap_init();
    124 
    125 	/*
    126 	 * step 6: init the kernel memory allocator.   after this call the
    127 	 * kernel memory allocator (malloc) can be used. this includes
    128 	 * setting up the kmem_map.
    129 	 */
    130 
    131 	kmeminit();
    132 
    133 	/*
    134 	 * step 7: init all pagers and the pager_map.
    135 	 */
    136 
    137 	uvm_pager_init();
    138 
    139 	/*
    140 	 * step 8: init the uvm_loan() facility.
    141 	 */
    142 
    143 	uvm_loan_init();
    144 
    145 	/*
    146 	 * the VM system is now up!  now that malloc is up we can resize the
    147 	 * <obj,off> => <page> hash table for general use and enable paging
    148 	 * of kernel objects.
    149 	 */
    150 
    151 	uvm_page_rehash();
    152 	uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
    153 	    UAO_FLAG_KERNSWAP);
    154 
    155 	uvmpdpol_reinit();
    156 
    157 	/*
    158 	 * Initialize pools.  This must be done before anyone manipulates
    159 	 * any vm_maps because we use a pool for some map entry structures.
    160 	 */
    161 
    162 	pool_subsystem_init();
    163 
    164 	/*
    165 	 * init anonymous memory systems
    166 	 */
    167 
    168 	uvm_anon_init();
    169 }
    170