| | 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 | |
| | 65 | mach_port_t bootstrap_port = MACH_PORT_NULL; |
| | 66 | mach_port_t mach_task_self_ = MACH_PORT_NULL; |
| | 67 | #ifdef __i386__ |
| | 68 | mach_port_t mach_host_self_ = MACH_PORT_NULL; |
| | 69 | #endif |
| | 70 | extern mach_port_t _task_reply_port; |
| | 71 | |
| | 72 | vm_size_t vm_kernel_page_size = 0; |
| | 73 | vm_size_t vm_kernel_page_mask = 0; |
| | 74 | int vm_kernel_page_shift = 0; |
| | 75 | |
| | 76 | vm_size_t vm_page_size = 0; |
| | 77 | vm_size_t vm_page_mask = 0; |
| | 78 | int vm_page_shift = 0; |
| | 79 | |
| | 80 | int mach_init(void); |
| | 81 | int _mach_fork_child(void); |
| | 82 | |
| | 83 | static void mach_init_doit(void); |
| | 84 | |
| | 85 | extern void _pthread_set_self(void *); |
| | 86 | extern void _init_cpu_capabilities(void); |
| | 87 | |
| | 88 | kern_return_t |
| | 89 | host_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 | */ |
| | 99 | int |
| | 100 | mach_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() |
| | 111 | int |
| | 112 | _mach_fork_child(void) |
| | 113 | { |
| | 114 | mach_init_doit(); |
| | 115 | return 0; |
| | 116 | } |
| | 117 | |
| | 118 | void |
| | 119 | mach_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 | } |
projects / apple / xnu.git / blame_incremental