/* * Copyright (c) 2000-2011 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/zalloc.h> #include <kern/kalloc.h> #include <kern/kext_alloc.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> #define ZONE_MAP_MIN CONFIG_ZONE_MAP_MIN /* Maximum zone size is 1.5G */ #define ZONE_MAP_MAX (1024 * 1024 * 1536) 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; boolean_t vm_kernel_ready = FALSE; boolean_t kmem_ready = FALSE; boolean_t zlog_ready = FALSE; vm_offset_t kmapoff_kaddr; unsigned int kmapoff_pgcnt; /* * vm_mem_bootstrap initializes the virtual memory system. * This is done only by the first cpu up. */ void vm_mem_bootstrap(void) { vm_offset_t start, end; vm_size_t zsizearg; mach_vm_size_t zsize; /* * Initializes resident memory structures. * From here on, all physical memory is accounted for, * and we use only virtual addresses. */ #define vm_mem_bootstrap_kprintf(x) /* kprintf(x) */ vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_bootstrap\n")); vm_page_bootstrap(&start, &end); /* * Initialize other VM packages */ vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_bootstrap\n")); zone_bootstrap(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_object_bootstrap\n")); vm_object_bootstrap(); vm_kernel_ready = TRUE; vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_map_init\n")); vm_map_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kmem_init\n")); kmem_init(start, end); kmem_ready = TRUE; /* * 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 at most 2M of VA from the map.) */ if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt, sizeof (kmapoff_pgcnt))) kmapoff_pgcnt = early_random() & 0x1ff; /* 9 bits */ if (kmapoff_pgcnt > 0 && vm_allocate(kernel_map, &kmapoff_kaddr, kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE) != KERN_SUCCESS) panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling pmap_init\n")); pmap_init(); zlog_ready = TRUE; if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg))) zsize = zsizearg * 1024ULL * 1024ULL; else { zsize = sane_size >> 2; /* Get target zone size as 1/4 of physical memory */ } if (zsize < ZONE_MAP_MIN) zsize = ZONE_MAP_MIN; /* Clamp to min */ #if defined(__LP64__) zsize += zsize >> 1; #endif /* __LP64__ */ if (zsize > sane_size >> 1) zsize = sane_size >> 1; /* Clamp to half of RAM max */ #if !__LP64__ if (zsize > ZONE_MAP_MAX) zsize = ZONE_MAP_MAX; /* Clamp to 1.5GB max for K32 */ #endif /* !__LP64__ */ vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kext_alloc_init\n")); kext_alloc_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_init\n")); assert((vm_size_t) zsize == zsize); zone_init((vm_size_t) zsize); /* Allocate address space for zones */ /* The vm_page_zone must be created prior to kalloc_init; that * routine can trigger zalloc()s (for e.g. mutex statistic structure * initialization). The vm_page_zone must exist to saisfy fictitious * page allocations (which are used for guard pages by the guard * mode zone allocator). */ vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_module_init\n")); vm_page_module_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kalloc_init\n")); kalloc_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_fault_init\n")); vm_fault_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_manager_default_init\n")); memory_manager_default_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_object_control_bootstrap\n")); memory_object_control_bootstrap(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling device_pager_bootstrap\n")); device_pager_bootstrap(); vm_paging_map_init(); vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: done\n")); } void vm_mem_init(void) { vm_object_init(); }