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uvm_init.c revision 1.45.14.2 
      1 /*	$NetBSD: uvm_init.c,v 1.45.14.2 2017/02/05 13:41:01 skrll 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 1.45.14.2 2017/02/05 13:41:01 skrll 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_physseg.h>
     50 #include <uvm/uvm_readahead.h>
     51 
     52 /*
     53  * struct uvm: we store most global vars in this structure to make them
     54  * easier to spot...
     55  */
     56 
     57 struct uvm uvm;		/* decl */
     58 struct uvmexp uvmexp;	/* decl */
     59 struct uvm_object *uvm_kernel_object;
     60 
     61 #if defined(__uvmexp_pagesize)
     62 const int * const uvmexp_pagesize = &uvmexp.pagesize;
     63 const int * const uvmexp_pagemask = &uvmexp.pagemask;
     64 const int * const uvmexp_pageshift = &uvmexp.pageshift;
     65 #endif
     66 
     67 kmutex_t uvm_pageqlock;
     68 kmutex_t uvm_fpageqlock;
     69 kmutex_t uvm_kentry_lock;
     70 kmutex_t uvm_swap_data_lock;
     71 
     72 /*
     73  * uvm_md_init: Init dependant on the MD boot context.
     74  *		called from MD code.
     75  */
     76 
     77 void
     78 uvm_md_init(void)
     79 {
     80 	uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
     81 	uvm_physseg_init();
     82 }
     83 
     84 /*
     85  * uvm_init: init the VM system.   called from kern/init_main.c.
     86  */
     87 
     88 void
     89 uvm_init(void)
     90 {
     91 	vaddr_t kvm_start, kvm_end;
     92 
     93 	/*
     94 	 * Ensure that the hardware set the page size, zero the UVM structure.
     95 	 */
     96 
     97 	if (uvmexp.pagesize == 0) {
     98 		panic("uvm_init: page size not set");
     99 	}
    100 
    101 	memset(&uvm, 0, sizeof(uvm));
    102 	averunnable.fscale = FSCALE;
    103 
    104 	/*
    105 	 * Init the page sub-system.  This includes allocating the vm_page
    106 	 * structures, and setting up all the page queues (and locks).
    107 	 * Available memory will be put in the "free" queue, kvm_start and
    108 	 * kvm_end will be set to the area of kernel virtual memory which
    109 	 * is available for general use.
    110 	 */
    111 
    112 	uvm_page_init(&kvm_start, &kvm_end);
    113 
    114 	/*
    115 	 * Init the map sub-system.
    116 	 */
    117 
    118 	uvm_map_init();
    119 
    120 	/*
    121 	 * Setup the kernel's virtual memory data structures.  This includes
    122 	 * setting up the kernel_map/kernel_object.
    123 	 * Bootstrap all kernel memory allocators.
    124 	 */
    125 
    126 	uao_init();
    127 	uvm_km_bootstrap(kvm_start, kvm_end);
    128 
    129 	/*
    130 	 * Setup uvm_map caches and init the amap.
    131 	 */
    132 
    133 	uvm_map_init_caches();
    134 	uvm_amap_init();
    135 
    136 	/*
    137 	 * Init the pmap module.  The pmap module is free to allocate
    138 	 * memory for its private use (e.g. pvlists).
    139 	 */
    140 
    141 	pmap_init();
    142 
    143 	/*
    144 	 * Make kernel memory allocators ready for use.
    145 	 * After this call the pool/kmem memory allocators can be used.
    146 	 */
    147 
    148 	uvm_km_init();
    149 #ifdef __HAVE_PMAP_PV_TRACK
    150 	pmap_pv_init();
    151 #endif
    152 
    153 #ifdef DEBUG
    154 	debug_init();
    155 #endif
    156 
    157 	/*
    158 	 * Init all pagers and the pager_map.
    159 	 */
    160 
    161 	uvm_pager_init();
    162 
    163 	/*
    164 	 * Initialize the uvm_loan() facility.
    165 	 */
    166 
    167 	uvm_loan_init();
    168 
    169 	/*
    170 	 * Init emap subsystem.
    171 	 */
    172 
    173 	uvm_emap_sysinit();
    174 
    175 	/*
    176 	 * The VM system is now up!  Now that kmem is up we can resize the
    177 	 * <obj,off> => <page> hash table for general use and enable paging
    178 	 * of kernel objects.
    179 	 */
    180 
    181 	uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
    182 	    UAO_FLAG_KERNSWAP);
    183 
    184 	uvmpdpol_reinit();
    185 
    186 	/*
    187 	 * Init anonymous memory systems.
    188 	 */
    189 
    190 	uvm_anon_init();
    191 
    192 	uvm_uarea_init();
    193 
    194 	/*
    195 	 * Init readahead mechanism.
    196 	 */
    197 
    198 	uvm_ra_init();
    199 }
    200