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uvm_init.c revision 1.49.2.1 
      1 /*	$NetBSD: uvm_init.c,v 1.49.2.1 2020/04/08 14:09:04 martin 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 1.49.2.1 2020/04/08 14:09:04 martin 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_kentry_lock __cacheline_aligned;
     68 
     69 /*
     70  * uvm_md_init: Init dependant on the MD boot context.
     71  *		called from MD code.
     72  */
     73 
     74 void
     75 uvm_md_init(void)
     76 {
     77 	uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
     78 	uvm_physseg_init();
     79 }
     80 
     81 /*
     82  * uvm_init: init the VM system.   called from kern/init_main.c.
     83  */
     84 
     85 void
     86 uvm_init(void)
     87 {
     88 	vaddr_t kvm_start, kvm_end;
     89 
     90 	/*
     91 	 * Ensure that the hardware set the page size, zero the UVM structure.
     92 	 */
     93 
     94 	if (uvmexp.pagesize == 0) {
     95 		panic("uvm_init: page size not set");
     96 	}
     97 
     98 	memset(&uvm, 0, sizeof(uvm));
     99 	averunnable.fscale = FSCALE;
    100 
    101 	/*
    102 	 * Init the page sub-system.  This includes allocating the vm_page
    103 	 * structures, and setting up all the page queues (and locks).
    104 	 * Available memory will be put in the "free" queue, kvm_start and
    105 	 * kvm_end will be set to the area of kernel virtual memory which
    106 	 * is available for general use.
    107 	 */
    108 
    109 	uvm_page_init(&kvm_start, &kvm_end);
    110 
    111 	/*
    112 	 * Init the map sub-system.
    113 	 */
    114 
    115 	uvm_map_init();
    116 
    117 	/*
    118 	 * Setup the kernel's virtual memory data structures.  This includes
    119 	 * setting up the kernel_map/kernel_object.
    120 	 * Bootstrap all kernel memory allocators.
    121 	 */
    122 
    123 	uao_init();
    124 	uvm_km_bootstrap(kvm_start, kvm_end);
    125 
    126 	/*
    127 	 * Setup uvm_map caches and init the amap.
    128 	 */
    129 
    130 	uvm_map_init_caches();
    131 	uvm_amap_init();
    132 
    133 	/*
    134 	 * Init the pmap module.  The pmap module is free to allocate
    135 	 * memory for its private use (e.g. pvlists).
    136 	 */
    137 
    138 	pmap_init();
    139 
    140 	/*
    141 	 * Make kernel memory allocators ready for use.
    142 	 * After this call the pool/kmem memory allocators can be used.
    143 	 */
    144 
    145 	uvm_km_init();
    146 #ifdef __HAVE_PMAP_PV_TRACK
    147 	pmap_pv_init();
    148 #endif
    149 
    150 #ifdef DEBUG
    151 	debug_init();
    152 #endif
    153 
    154 	/*
    155 	 * Init all pagers and the pager_map.
    156 	 */
    157 
    158 	uvm_pager_init();
    159 
    160 	/*
    161 	 * Initialize the uvm_loan() facility.
    162 	 */
    163 
    164 	uvm_loan_init();
    165 
    166 	/*
    167 	 * Enable paging of kernel objects.
    168 	 */
    169 
    170 	uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
    171 	    UAO_FLAG_KERNSWAP);
    172 
    173 	uvmpdpol_reinit();
    174 
    175 	/*
    176 	 * Init anonymous memory systems.
    177 	 */
    178 
    179 	uvm_anon_init();
    180 
    181 	uvm_uarea_init();
    182 
    183 	/*
    184 	 * Init readahead mechanism.
    185 	 */
    186 
    187 	uvm_ra_init();
    188 }
    189