/* * Copyright (c) 2000-2020 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * File: vm/vm_init.c * Author: Avadis Tevanian, Jr., Michael Wayne Young * Date: 1985 * * Initialize the Virtual Memory subsystem. */ #include <mach/machine/vm_types.h> #include <mach/vm_map.h> #include <kern/startup.h> #include <kern/zalloc_internal.h> #include <kern/kext_alloc.h> #include <sys/kdebug.h> #include <vm/vm_object.h> #include <vm/vm_map.h> #include <vm/vm_page.h> #include <vm/vm_kern.h> #include <vm/memory_object.h> #include <vm/vm_fault.h> #include <vm/vm_init.h> #include <pexpert/pexpert.h> #include <vm/vm_protos.h> const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS; const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS; TUNABLE(bool, iokit_iomd_setownership_enabled, "iokit_iomd_setownership_enabled", true); vm_offset_t kmapoff_kaddr; unsigned int kmapoff_pgcnt; static inline void vm_mem_bootstrap_log(const char *message) { // kprintf("vm_mem_bootstrap: %s\n", message); kernel_debug_string_early(message); } /* * vm_mem_bootstrap initializes the virtual memory system. * This is done only by the first cpu up. */ __startup_func void vm_mem_bootstrap(void) { vm_offset_t start, end; /* * Initializes resident memory structures. * From here on, all physical memory is accounted for, * and we use only virtual addresses. */ vm_mem_bootstrap_log("vm_page_bootstrap"); vm_page_bootstrap(&start, &end); /* * Initialize other VM packages */ vm_mem_bootstrap_log("zone_bootstrap"); zone_bootstrap(); vm_mem_bootstrap_log("vm_object_bootstrap"); vm_object_bootstrap(); kernel_startup_initialize_upto(STARTUP_SUB_VM_KERNEL); vm_mem_bootstrap_log("vm_map_init"); vm_map_init(); vm_mem_bootstrap_log("kmem_init"); kmem_init(start, end); kernel_startup_initialize_upto(STARTUP_SUB_KMEM); /* * Eat a random amount of kernel_map to fuzz subsequent heap, zone and * stack addresses. (With a 4K page and 9 bits of randomness, this * eats about 2M of VA from the map) * * Note that we always need to slide by at least one page because the VM * pointer packing schemes using KERNEL_PMAP_HEAP_RANGE_START as a base * do not admit this address to be part of any zone submap. */ kmapoff_pgcnt = (early_random() & 0x1ff) + 1; /* 9 bits */ if (vm_allocate_kernel(kernel_map, &kmapoff_kaddr, kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_OSFMK) != KERN_SUCCESS) { panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt); } vm_mem_bootstrap_log("pmap_init"); pmap_init(); kernel_startup_initialize_upto(STARTUP_SUB_KMEM_ALLOC); vm_mem_bootstrap_log("vm_fault_init"); vm_fault_init(); vm_mem_bootstrap_log("kext_alloc_init"); kext_alloc_init(); kernel_startup_initialize_upto(STARTUP_SUB_ZALLOC); vm_paging_map_init(); vm_page_delayed_work_init_ctx(); if (iokit_iomd_setownership_enabled) { kprintf("IOKit IOMD setownership ENABLED\n"); } else { kprintf("IOKit IOMD setownership DISABLED\n"); } }