1/* 2 * Copyright (c) 1999-2012 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Mach Operating System 30 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University 31 * All Rights Reserved. 32 * 33 * Permission to use, copy, modify and distribute this software and its 34 * documentation is hereby granted, provided that both the copyright 35 * notice and this permission notice appear in all copies of the 36 * software, derivative works or modified versions, and any portions 37 * thereof, and that both notices appear in supporting documentation. 38 * 39 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 40 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 41 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 42 * 43 * Carnegie Mellon requests users of this software to return to 44 * 45 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 46 * School of Computer Science 47 * Carnegie Mellon University 48 * Pittsburgh PA 15213-3890 49 * 50 * any improvements or extensions that they make and grant Carnegie Mellon 51 * the rights to redistribute these changes. 52 */ 53 54#include <mach/mach.h> 55#include <mach/boolean.h> 56#include <mach/machine/ndr_def.h> 57#include <mach/mach_traps.h> 58#include <mach/mach_host.h> 59#include <mach/mach_init.h> 60#include <mach/vm_param.h> 61#include <machine/cpu_capabilities.h> 62#include <stdbool.h> 63#include "externs.h" 64 65mach_port_t bootstrap_port = MACH_PORT_NULL; 66mach_port_t mach_task_self_ = MACH_PORT_NULL; 67#ifdef __i386__ 68mach_port_t mach_host_self_ = MACH_PORT_NULL; 69#endif 70extern mach_port_t _task_reply_port; 71 72vm_size_t vm_kernel_page_size = 0; 73vm_size_t vm_kernel_page_mask = 0; 74int vm_kernel_page_shift = 0; 75 76vm_size_t vm_page_size = 0; 77vm_size_t vm_page_mask = 0; 78int vm_page_shift = 0; 79 80int mach_init(void); 81int _mach_fork_child(void); 82 83static void mach_init_doit(void); 84 85extern void _pthread_set_self(void *); 86extern void _init_cpu_capabilities(void); 87 88kern_return_t 89host_page_size(__unused host_t host, vm_size_t *out_page_size) 90{ 91 *out_page_size = vm_kernel_page_size; 92 return KERN_SUCCESS; 93} 94 95/* 96 * mach_init() must be called explicitly in static executables (including dyld). 97 * called by libSystem_initializer() in dynamic executables 98 */ 99int 100mach_init(void) 101{ 102 static bool mach_init_inited = false; 103 if (!mach_init_inited) { 104 mach_init_doit(); 105 mach_init_inited = true; 106 } 107 return 0; 108} 109 110// called by libSystem_atfork_child() 111int 112_mach_fork_child(void) 113{ 114 mach_init_doit(); 115 return 0; 116} 117 118void 119mach_init_doit(void) 120{ 121 // Initialize cached mach ports defined in mach_init.h 122 mach_task_self_ = task_self_trap(); 123 _task_reply_port = mach_reply_port(); 124 125 if (vm_kernel_page_shift == 0) { 126#ifdef _COMM_PAGE_KERNEL_PAGE_SHIFT 127 vm_kernel_page_shift = *(uint8_t*) _COMM_PAGE_KERNEL_PAGE_SHIFT; 128 vm_kernel_page_size = 1 << vm_kernel_page_shift; 129 vm_kernel_page_mask = vm_kernel_page_size - 1; 130#else 131 vm_kernel_page_size = PAGE_SIZE; 132 vm_kernel_page_mask = PAGE_MASK; 133 vm_kernel_page_shift = PAGE_SHIFT; 134#endif /* _COMM_PAGE_KERNEL_PAGE_SHIFT */ 135 } 136 137 if (vm_page_shift == 0) { 138 vm_page_shift = vm_kernel_page_shift; 139 vm_page_size = 1 << vm_page_shift; 140 vm_page_mask = vm_page_size - 1; 141 } 142 143 _init_cpu_capabilities(); 144 _pthread_set_self(0); 145} 146