void
uvm_init()
{
	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;

	/*
	 * 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.
	 */

	uvm_km_page_init();
	kmeminit();
#if !defined(__HAVE_PMAP_DIRECT)
	kthread_create_deferred(uvm_km_createthread, NULL);
#endif

	/*
	 * step 7: init all pagers and the pager_map.
	 */

	uvm_pager_init();

	/*
	 * step 8: init anonymous memory system
	 */

	amap_init();		/* init amap module */

	/*
	 * 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();
}
Beispiel #2
0
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 6.5: init the dma allocator, which is backed by pools.
	 */
	dma_alloc_init();

	/*
	 * 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
	 * enable paging of kernel objects.
	 */

	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", 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", DEADBEEF1);
#endif
	/*
	 * init anonymous memory systems
	 */
	uvm_anon_init();

#ifndef SMALL_KERNEL
	/*
	 * Switch kernel and kmem_map over to a best-fit allocator,
	 * instead of walking the tree.
	 */
	uvm_map_set_uaddr(kernel_map, &kernel_map->uaddr_any[3],
	    uaddr_bestfit_create(vm_map_min(kernel_map),
	    vm_map_max(kernel_map)));
	uvm_map_set_uaddr(kmem_map, &kmem_map->uaddr_any[3],
	    uaddr_bestfit_create(vm_map_min(kmem_map),
	    vm_map_max(kmem_map)));
#endif /* !SMALL_KERNEL */
}