1 /****************************************************************************** 2 * 3 * Module Name: utxfinit - External interfaces for ACPICA initialization 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #define EXPORT_ACPI_INTERFACES 45 46 #include <acpi/acpi.h> 47 #include "accommon.h" 48 #include "acevents.h" 49 #include "acnamesp.h" 50 #include "acdebug.h" 51 #include "actables.h" 52 53 #define _COMPONENT ACPI_UTILITIES 54 ACPI_MODULE_NAME("utxfinit") 55 56 /* For acpi_exec only */ 57 void ae_do_object_overrides(void); 58 59 /******************************************************************************* 60 * 61 * FUNCTION: acpi_initialize_subsystem 62 * 63 * PARAMETERS: None 64 * 65 * RETURN: Status 66 * 67 * DESCRIPTION: Initializes all global variables. This is the first function 68 * called, so any early initialization belongs here. 69 * 70 ******************************************************************************/ 71 72 acpi_status __init acpi_initialize_subsystem(void) 73 { 74 acpi_status status; 75 76 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); 77 78 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; 79 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); 80 81 /* Initialize the OS-Dependent layer */ 82 83 status = acpi_os_initialize(); 84 if (ACPI_FAILURE(status)) { 85 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization")); 86 return_ACPI_STATUS(status); 87 } 88 89 /* Initialize all globals used by the subsystem */ 90 91 status = acpi_ut_init_globals(); 92 if (ACPI_FAILURE(status)) { 93 ACPI_EXCEPTION((AE_INFO, status, 94 "During initialization of globals")); 95 return_ACPI_STATUS(status); 96 } 97 98 /* Create the default mutex objects */ 99 100 status = acpi_ut_mutex_initialize(); 101 if (ACPI_FAILURE(status)) { 102 ACPI_EXCEPTION((AE_INFO, status, 103 "During Global Mutex creation")); 104 return_ACPI_STATUS(status); 105 } 106 107 /* 108 * Initialize the namespace manager and 109 * the root of the namespace tree 110 */ 111 status = acpi_ns_root_initialize(); 112 if (ACPI_FAILURE(status)) { 113 ACPI_EXCEPTION((AE_INFO, status, 114 "During Namespace initialization")); 115 return_ACPI_STATUS(status); 116 } 117 118 /* Initialize the global OSI interfaces list with the static names */ 119 120 status = acpi_ut_initialize_interfaces(); 121 if (ACPI_FAILURE(status)) { 122 ACPI_EXCEPTION((AE_INFO, status, 123 "During OSI interfaces initialization")); 124 return_ACPI_STATUS(status); 125 } 126 127 return_ACPI_STATUS(AE_OK); 128 } 129 130 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem) 131 132 /******************************************************************************* 133 * 134 * FUNCTION: acpi_enable_subsystem 135 * 136 * PARAMETERS: flags - Init/enable Options 137 * 138 * RETURN: Status 139 * 140 * DESCRIPTION: Completes the subsystem initialization including hardware. 141 * Puts system into ACPI mode if it isn't already. 142 * 143 ******************************************************************************/ 144 acpi_status __init acpi_enable_subsystem(u32 flags) 145 { 146 acpi_status status = AE_OK; 147 148 ACPI_FUNCTION_TRACE(acpi_enable_subsystem); 149 150 #if (!ACPI_REDUCED_HARDWARE) 151 152 /* Enable ACPI mode */ 153 154 if (!(flags & ACPI_NO_ACPI_ENABLE)) { 155 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 156 "[Init] Going into ACPI mode\n")); 157 158 acpi_gbl_original_mode = acpi_hw_get_mode(); 159 160 status = acpi_enable(); 161 if (ACPI_FAILURE(status)) { 162 ACPI_WARNING((AE_INFO, "AcpiEnable failed")); 163 return_ACPI_STATUS(status); 164 } 165 } 166 167 /* 168 * Obtain a permanent mapping for the FACS. This is required for the 169 * Global Lock and the Firmware Waking Vector 170 */ 171 if (!(flags & ACPI_NO_FACS_INIT)) { 172 status = acpi_tb_initialize_facs(); 173 if (ACPI_FAILURE(status)) { 174 ACPI_WARNING((AE_INFO, "Could not map the FACS table")); 175 return_ACPI_STATUS(status); 176 } 177 } 178 #endif /* !ACPI_REDUCED_HARDWARE */ 179 180 /* 181 * Install the default op_region handlers. These are installed unless 182 * other handlers have already been installed via the 183 * install_address_space_handler interface. 184 */ 185 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 186 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 187 "[Init] Installing default address space handlers\n")); 188 189 status = acpi_ev_install_region_handlers(); 190 if (ACPI_FAILURE(status)) { 191 return_ACPI_STATUS(status); 192 } 193 } 194 #if (!ACPI_REDUCED_HARDWARE) 195 /* 196 * Initialize ACPI Event handling (Fixed and General Purpose) 197 * 198 * Note1: We must have the hardware and events initialized before we can 199 * execute any control methods safely. Any control method can require 200 * ACPI hardware support, so the hardware must be fully initialized before 201 * any method execution! 202 * 203 * Note2: Fixed events are initialized and enabled here. GPEs are 204 * initialized, but cannot be enabled until after the hardware is 205 * completely initialized (SCI and global_lock activated) and the various 206 * initialization control methods are run (_REG, _STA, _INI) on the 207 * entire namespace. 208 */ 209 if (!(flags & ACPI_NO_EVENT_INIT)) { 210 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 211 "[Init] Initializing ACPI events\n")); 212 213 status = acpi_ev_initialize_events(); 214 if (ACPI_FAILURE(status)) { 215 return_ACPI_STATUS(status); 216 } 217 } 218 219 /* 220 * Install the SCI handler and Global Lock handler. This completes the 221 * hardware initialization. 222 */ 223 if (!(flags & ACPI_NO_HANDLER_INIT)) { 224 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 225 "[Init] Installing SCI/GL handlers\n")); 226 227 status = acpi_ev_install_xrupt_handlers(); 228 if (ACPI_FAILURE(status)) { 229 return_ACPI_STATUS(status); 230 } 231 } 232 #endif /* !ACPI_REDUCED_HARDWARE */ 233 234 return_ACPI_STATUS(status); 235 } 236 237 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem) 238 239 /******************************************************************************* 240 * 241 * FUNCTION: acpi_initialize_objects 242 * 243 * PARAMETERS: flags - Init/enable Options 244 * 245 * RETURN: Status 246 * 247 * DESCRIPTION: Completes namespace initialization by initializing device 248 * objects and executing AML code for Regions, buffers, etc. 249 * 250 ******************************************************************************/ 251 acpi_status __init acpi_initialize_objects(u32 flags) 252 { 253 acpi_status status = AE_OK; 254 255 ACPI_FUNCTION_TRACE(acpi_initialize_objects); 256 257 /* 258 * Run all _REG methods 259 * 260 * Note: Any objects accessed by the _REG methods will be automatically 261 * initialized, even if they contain executable AML (see the call to 262 * acpi_ns_initialize_objects below). 263 */ 264 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 265 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 266 "[Init] Executing _REG OpRegion methods\n")); 267 268 status = acpi_ev_initialize_op_regions(); 269 if (ACPI_FAILURE(status)) { 270 return_ACPI_STATUS(status); 271 } 272 } 273 #ifdef ACPI_EXEC_APP 274 /* 275 * This call implements the "initialization file" option for acpi_exec. 276 * This is the precise point that we want to perform the overrides. 277 */ 278 ae_do_object_overrides(); 279 #endif 280 281 /* 282 * Execute any module-level code that was detected during the table load 283 * phase. Although illegal since ACPI 2.0, there are many machines that 284 * contain this type of code. Each block of detected executable AML code 285 * outside of any control method is wrapped with a temporary control 286 * method object and placed on a global list. The methods on this list 287 * are executed below. 288 */ 289 acpi_ns_exec_module_code_list(); 290 291 /* 292 * Initialize the objects that remain uninitialized. This runs the 293 * executable AML that may be part of the declaration of these objects: 294 * operation_regions, buffer_fields, Buffers, and Packages. 295 */ 296 if (!(flags & ACPI_NO_OBJECT_INIT)) { 297 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 298 "[Init] Completing Initialization of ACPI Objects\n")); 299 300 status = acpi_ns_initialize_objects(); 301 if (ACPI_FAILURE(status)) { 302 return_ACPI_STATUS(status); 303 } 304 } 305 306 /* 307 * Initialize all device objects in the namespace. This runs the device 308 * _STA and _INI methods. 309 */ 310 if (!(flags & ACPI_NO_DEVICE_INIT)) { 311 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 312 "[Init] Initializing ACPI Devices\n")); 313 314 status = acpi_ns_initialize_devices(); 315 if (ACPI_FAILURE(status)) { 316 return_ACPI_STATUS(status); 317 } 318 } 319 320 /* 321 * Empty the caches (delete the cached objects) on the assumption that 322 * the table load filled them up more than they will be at runtime -- 323 * thus wasting non-paged memory. 324 */ 325 status = acpi_purge_cached_objects(); 326 327 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; 328 return_ACPI_STATUS(status); 329 } 330 331 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects) 332