198 lines
5.4 KiB
C
198 lines
5.4 KiB
C
/* $OpenBSD: uvm_init.c,v 1.42 2021/03/20 10:24:21 mpi Exp $ */
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/* $NetBSD: uvm_init.c,v 1.14 2000/06/27 17:29:23 mrg Exp $ */
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/*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp
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*/
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/*
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* uvm_init.c: init the vm system.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/filedesc.h>
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#include <sys/percpu.h>
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#include <sys/resourcevar.h>
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#include <sys/mman.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/pool.h>
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#include <uvm/uvm.h>
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#include <uvm/uvm_addr.h>
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/*
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* struct uvm: we store all global vars in this structure to make them
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* easier to spot...
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*/
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struct uvm uvm; /* decl */
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struct uvmexp uvmexp; /* decl */
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COUNTERS_BOOT_MEMORY(uvmexp_countersboot, exp_ncounters);
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struct cpumem *uvmexp_counters = COUNTERS_BOOT_INITIALIZER(uvmexp_countersboot);
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#if defined(VM_MIN_KERNEL_ADDRESS)
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vaddr_t vm_min_kernel_address = VM_MIN_KERNEL_ADDRESS;
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#else
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vaddr_t vm_min_kernel_address;
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#endif
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/*
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* local prototypes
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*/
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/*
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* uvm_init: init the VM system. called from kern/init_main.c.
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*/
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void
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uvm_init(void)
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{
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vaddr_t kvm_start, kvm_end;
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/*
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* Ensure that the hardware set the page size.
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*/
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if (uvmexp.pagesize == 0) {
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panic("uvm_init: page size not set");
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}
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averunnable.fscale = FSCALE;
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/*
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* Init the page sub-system. This includes allocating the vm_page
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* structures, and setting up all the page queues (and locks).
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* Available memory will be put in the "free" queue, kvm_start and
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* kvm_end will be set to the area of kernel virtual memory which
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* is available for general use.
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*/
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uvm_page_init(&kvm_start, &kvm_end);
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/*
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* Init the map sub-system.
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*
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* Allocates the static pool of vm_map_entry structures that are
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* used for "special" kernel maps (e.g. kernel_map, kmem_map, etc...).
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*/
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uvm_map_init();
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/*
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* Setup the kernel's virtual memory data structures. This includes
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* setting up the kernel_map/kernel_object.
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*/
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uvm_km_init(vm_min_kernel_address, kvm_start, kvm_end);
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/*
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* step 4.5: init (tune) the fault recovery code.
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*/
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uvmfault_init();
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/*
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* Init the pmap module. The pmap module is free to allocate
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* memory for its private use (e.g. pvlists).
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*/
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pmap_init();
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/*
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* step 6: init uvm_km_page allocator memory.
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*/
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uvm_km_page_init();
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/*
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* Make kernel memory allocators ready for use.
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* After this call the malloc memory allocator can be used.
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*/
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kmeminit();
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/*
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* step 7.5: init the dma allocator, which is backed by pools.
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*/
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dma_alloc_init();
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/*
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* Init all pagers and the pager_map.
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*/
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uvm_pager_init();
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/*
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* step 9: init anonymous memory system
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*/
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amap_init();
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/*
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* step 10: start uvm_km_page allocator thread.
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*/
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uvm_km_page_lateinit();
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/*
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* the VM system is now up! now that malloc is up we can
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* enable paging of kernel objects.
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*/
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uao_create(VM_KERNEL_SPACE_SIZE, UAO_FLAG_KERNSWAP);
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/*
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* reserve some unmapped space for malloc/pool use after free usage
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*/
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#ifdef DEADBEEF0
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kvm_start = trunc_page(DEADBEEF0) - PAGE_SIZE;
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if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE,
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NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(PROT_NONE,
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PROT_NONE, MAP_INHERIT_NONE, MADV_RANDOM, UVM_FLAG_FIXED)))
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panic("uvm_init: cannot reserve dead beef @0x%x", DEADBEEF0);
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#endif
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#ifdef DEADBEEF1
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kvm_start = trunc_page(DEADBEEF1) - PAGE_SIZE;
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if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE,
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NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(PROT_NONE,
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PROT_NONE, MAP_INHERIT_NONE, MADV_RANDOM, UVM_FLAG_FIXED)))
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panic("uvm_init: cannot reserve dead beef @0x%x", DEADBEEF1);
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#endif
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/*
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* Init anonymous memory systems.
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*/
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uvm_anon_init();
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#ifndef SMALL_KERNEL
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/*
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* Switch kernel and kmem_map over to a best-fit allocator,
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* instead of walking the tree.
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*/
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uvm_map_set_uaddr(kernel_map, &kernel_map->uaddr_any[3],
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uaddr_bestfit_create(vm_map_min(kernel_map),
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vm_map_max(kernel_map)));
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uvm_map_set_uaddr(kmem_map, &kmem_map->uaddr_any[3],
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uaddr_bestfit_create(vm_map_min(kmem_map),
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vm_map_max(kmem_map)));
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#endif /* !SMALL_KERNEL */
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}
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void
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uvm_init_percpu(void)
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{
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uvmexp_counters = counters_alloc_ncpus(uvmexp_counters, exp_ncounters);
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}
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