xref: /src/sys/uvm/uvm_init.c

/*	$NetBSD: uvm_init.c,v 1.4 1998/02/07 11:08:38 mrg Exp $	*/

/*
 * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
 *	   >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
 */
/*
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Charles D. Cranor and
 *      Washington University.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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/mount.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/conf.h>


#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/vm_kern.h>

#include <sys/syscallargs.h>

#include <uvm/uvm.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 */

UVMHIST_DECL(maphist);

/*
 * local prototypes
 */

/*
 * uvm_init: init the VM system.   called from kern/init_main.c.
 */

void uvm_init()

{
  vm_offset_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: zero the uvm structure
   */

  bzero(&uvm, sizeof(uvm));
  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 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 7: init all pagers and the pager_map.
   */

  uvm_pager_init();

  /*
   * step 8: allocate anons (can add more as we add swap... later)
   */

  uvm_anon_init();

  /*
   * the VM system is now up!  now that malloc is up we can resize the
   * <obj,off> => <page> hash table for general use and enable paging
   * of kernel objects.
   */

  uvm_page_rehash();
  uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, UAO_FLAG_KERNSWAP);


  /*
   * done!
   */

  return;
}