/* $OpenBSD: uvm_init.c,v 1.24 2009/06/16 23:54:58 oga Exp $ */ /* $NetBSD: uvm_init.c,v 1.14 2000/06/27 17:29:23 mrg 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. * 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/proc.h> #include <sys/malloc.h> #include <sys/vnode.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 */ /* * local prototypes */ /* * 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: set up stats. */ 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: init anonymous memory system */ amap_init(); /* init amap module */ /* * step 9: init uvm_km_page allocator memory. */ uvm_km_page_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); /* * reserve some unmapped space for malloc/pool use after free usage */ #ifdef DEADBEEF0 kvm_start = trunc_page(DEADBEEF0) - PAGE_SIZE; if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE, NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_RANDOM, UVM_FLAG_FIXED))) panic("uvm_init: cannot reserve dead beef @0x%x\n", DEADBEEF0); #endif #ifdef DEADBEEF1 kvm_start = trunc_page(DEADBEEF1) - PAGE_SIZE; if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE, NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_RANDOM, UVM_FLAG_FIXED))) panic("uvm_init: cannot reserve dead beef @0x%x\n", DEADBEEF1); #endif /* * init anonymous memory systems */ uvm_anon_init(); }