NetBSD/sys/uvm/uvm_init.c

196 lines
4.6 KiB
C

/* $NetBSD: uvm_init.c,v 1.41 2011/04/24 03:56:50 rmind Exp $ */
/*
* 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_init.c,v 1.41 2011/04/24 03:56:50 rmind Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/debug.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/resourcevar.h>
#include <sys/kmem.h>
#include <sys/mman.h>
#include <sys/vnode.h>
#include <uvm/uvm.h>
#include <uvm/uvm_pdpolicy.h>
#include <uvm/uvm_readahead.h>
/*
* struct uvm: we store most global vars in this structure to make them
* easier to spot...
*/
struct uvm uvm; /* decl */
struct uvmexp uvmexp; /* decl */
struct uvm_object *uvm_kernel_object;
#if defined(__uvmexp_pagesize)
int *uvmexp_pagesize = &uvmexp.pagesize;
int *uvmexp_pagemask = &uvmexp.pagemask;
int *uvmexp_pageshift = &uvmexp.pageshift;
#endif
kmutex_t uvm_pageqlock;
kmutex_t uvm_fpageqlock;
kmutex_t uvm_kentry_lock;
kmutex_t uvm_swap_data_lock;
/*
* uvm_init: init the VM system. called from kern/init_main.c.
*/
void
uvm_init(void)
{
vaddr_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
*/
memset(&uvm, 0, sizeof(uvm));
averunnable.fscale = FSCALE;
uvm_amap_init();
/*
* 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.
*/
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. this includes
* setting up the kmem_map.
*/
kmeminit();
#ifdef DEBUG
debug_init();
#endif
/*
* step 7: init all pagers and the pager_map.
*/
uvm_pager_init();
/*
* Initialize pools. This must be done before anyone manipulates
* any vm_maps because we use a pool for some map entry structures.
*/
pool_subsystem_init();
/*
* init slab memory allocator kmem(9).
*/
kmem_init();
/*
* Initialize the uvm_loan() facility.
*/
uvm_loan_init();
/*
* init emap subsystem.
*/
uvm_emap_sysinit();
/*
* the VM system is now up! now that kmem is up we can resize the
* <obj,off> => <page> hash table for general use and enable paging
* of kernel objects.
*/
uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
UAO_FLAG_KERNSWAP);
uvmpdpol_reinit();
/*
* init anonymous memory systems
*/
uvm_anon_init();
uvm_uarea_init();
/*
* init readahead module
*/
uvm_ra_init();
}