1 /****************************************************************************** 2 * 3 * Module Name: utxfinit - External interfaces for ACPICA initialization 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2014, 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 /******************************************************************************* 57 * 58 * FUNCTION: acpi_initialize_subsystem 59 * 60 * PARAMETERS: None 61 * 62 * RETURN: Status 63 * 64 * DESCRIPTION: Initializes all global variables. This is the first function 65 * called, so any early initialization belongs here. 66 * 67 ******************************************************************************/ 68 acpi_status __init acpi_initialize_subsystem(void) 69 { 70 acpi_status status; 71 72 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); 73 74 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; 75 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); 76 77 /* Initialize the OS-Dependent layer */ 78 79 status = acpi_os_initialize(); 80 if (ACPI_FAILURE(status)) { 81 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization")); 82 return_ACPI_STATUS(status); 83 } 84 85 /* Initialize all globals used by the subsystem */ 86 87 status = acpi_ut_init_globals(); 88 if (ACPI_FAILURE(status)) { 89 ACPI_EXCEPTION((AE_INFO, status, 90 "During initialization of globals")); 91 return_ACPI_STATUS(status); 92 } 93 94 /* Create the default mutex objects */ 95 96 status = acpi_ut_mutex_initialize(); 97 if (ACPI_FAILURE(status)) { 98 ACPI_EXCEPTION((AE_INFO, status, 99 "During Global Mutex creation")); 100 return_ACPI_STATUS(status); 101 } 102 103 /* 104 * Initialize the namespace manager and 105 * the root of the namespace tree 106 */ 107 status = acpi_ns_root_initialize(); 108 if (ACPI_FAILURE(status)) { 109 ACPI_EXCEPTION((AE_INFO, status, 110 "During Namespace initialization")); 111 return_ACPI_STATUS(status); 112 } 113 114 /* Initialize the global OSI interfaces list with the static names */ 115 116 status = acpi_ut_initialize_interfaces(); 117 if (ACPI_FAILURE(status)) { 118 ACPI_EXCEPTION((AE_INFO, status, 119 "During OSI interfaces initialization")); 120 return_ACPI_STATUS(status); 121 } 122 123 /* If configured, initialize the AML debugger */ 124 125 #ifdef ACPI_DEBUGGER 126 status = acpi_db_initialize(); 127 if (ACPI_FAILURE(status)) { 128 ACPI_EXCEPTION((AE_INFO, status, 129 "During Debugger initialization")); 130 return_ACPI_STATUS(status); 131 } 132 #endif 133 134 return_ACPI_STATUS(AE_OK); 135 } 136 137 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem) 138 139 /******************************************************************************* 140 * 141 * FUNCTION: acpi_enable_subsystem 142 * 143 * PARAMETERS: flags - Init/enable Options 144 * 145 * RETURN: Status 146 * 147 * DESCRIPTION: Completes the subsystem initialization including hardware. 148 * Puts system into ACPI mode if it isn't already. 149 * 150 ******************************************************************************/ 151 acpi_status __init acpi_enable_subsystem(u32 flags) 152 { 153 acpi_status status = AE_OK; 154 155 ACPI_FUNCTION_TRACE(acpi_enable_subsystem); 156 157 #if (!ACPI_REDUCED_HARDWARE) 158 159 /* Enable ACPI mode */ 160 161 if (!(flags & ACPI_NO_ACPI_ENABLE)) { 162 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 163 "[Init] Going into ACPI mode\n")); 164 165 acpi_gbl_original_mode = acpi_hw_get_mode(); 166 167 status = acpi_enable(); 168 if (ACPI_FAILURE(status)) { 169 ACPI_WARNING((AE_INFO, "AcpiEnable failed")); 170 return_ACPI_STATUS(status); 171 } 172 } 173 174 /* 175 * Obtain a permanent mapping for the FACS. This is required for the 176 * Global Lock and the Firmware Waking Vector 177 */ 178 status = acpi_tb_initialize_facs(); 179 if (ACPI_FAILURE(status)) { 180 ACPI_WARNING((AE_INFO, "Could not map the FACS table")); 181 return_ACPI_STATUS(status); 182 } 183 #endif /* !ACPI_REDUCED_HARDWARE */ 184 185 /* 186 * Install the default op_region handlers. These are installed unless 187 * other handlers have already been installed via the 188 * install_address_space_handler interface. 189 */ 190 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 191 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 192 "[Init] Installing default address space handlers\n")); 193 194 status = acpi_ev_install_region_handlers(); 195 if (ACPI_FAILURE(status)) { 196 return_ACPI_STATUS(status); 197 } 198 } 199 #if (!ACPI_REDUCED_HARDWARE) 200 /* 201 * Initialize ACPI Event handling (Fixed and General Purpose) 202 * 203 * Note1: We must have the hardware and events initialized before we can 204 * execute any control methods safely. Any control method can require 205 * ACPI hardware support, so the hardware must be fully initialized before 206 * any method execution! 207 * 208 * Note2: Fixed events are initialized and enabled here. GPEs are 209 * initialized, but cannot be enabled until after the hardware is 210 * completely initialized (SCI and global_lock activated) and the various 211 * initialization control methods are run (_REG, _STA, _INI) on the 212 * entire namespace. 213 */ 214 if (!(flags & ACPI_NO_EVENT_INIT)) { 215 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 216 "[Init] Initializing ACPI events\n")); 217 218 status = acpi_ev_initialize_events(); 219 if (ACPI_FAILURE(status)) { 220 return_ACPI_STATUS(status); 221 } 222 } 223 224 /* 225 * Install the SCI handler and Global Lock handler. This completes the 226 * hardware initialization. 227 */ 228 if (!(flags & ACPI_NO_HANDLER_INIT)) { 229 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 230 "[Init] Installing SCI/GL handlers\n")); 231 232 status = acpi_ev_install_xrupt_handlers(); 233 if (ACPI_FAILURE(status)) { 234 return_ACPI_STATUS(status); 235 } 236 } 237 #endif /* !ACPI_REDUCED_HARDWARE */ 238 239 return_ACPI_STATUS(status); 240 } 241 242 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem) 243 244 /******************************************************************************* 245 * 246 * FUNCTION: acpi_initialize_objects 247 * 248 * PARAMETERS: flags - Init/enable Options 249 * 250 * RETURN: Status 251 * 252 * DESCRIPTION: Completes namespace initialization by initializing device 253 * objects and executing AML code for Regions, buffers, etc. 254 * 255 ******************************************************************************/ 256 acpi_status __init acpi_initialize_objects(u32 flags) 257 { 258 acpi_status status = AE_OK; 259 260 ACPI_FUNCTION_TRACE(acpi_initialize_objects); 261 262 /* 263 * Run all _REG methods 264 * 265 * Note: Any objects accessed by the _REG methods will be automatically 266 * initialized, even if they contain executable AML (see the call to 267 * acpi_ns_initialize_objects below). 268 */ 269 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 270 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 271 "[Init] Executing _REG OpRegion methods\n")); 272 273 status = acpi_ev_initialize_op_regions(); 274 if (ACPI_FAILURE(status)) { 275 return_ACPI_STATUS(status); 276 } 277 } 278 279 /* 280 * Execute any module-level code that was detected during the table load 281 * phase. Although illegal since ACPI 2.0, there are many machines that 282 * contain this type of code. Each block of detected executable AML code 283 * outside of any control method is wrapped with a temporary control 284 * method object and placed on a global list. The methods on this list 285 * are executed below. 286 */ 287 acpi_ns_exec_module_code_list(); 288 289 /* 290 * Initialize the objects that remain uninitialized. This runs the 291 * executable AML that may be part of the declaration of these objects: 292 * operation_regions, buffer_fields, Buffers, and Packages. 293 */ 294 if (!(flags & ACPI_NO_OBJECT_INIT)) { 295 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 296 "[Init] Completing Initialization of ACPI Objects\n")); 297 298 status = acpi_ns_initialize_objects(); 299 if (ACPI_FAILURE(status)) { 300 return_ACPI_STATUS(status); 301 } 302 } 303 304 /* 305 * Initialize all device objects in the namespace. This runs the device 306 * _STA and _INI methods. 307 */ 308 if (!(flags & ACPI_NO_DEVICE_INIT)) { 309 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 310 "[Init] Initializing ACPI Devices\n")); 311 312 status = acpi_ns_initialize_devices(); 313 if (ACPI_FAILURE(status)) { 314 return_ACPI_STATUS(status); 315 } 316 } 317 318 /* 319 * Empty the caches (delete the cached objects) on the assumption that 320 * the table load filled them up more than they will be at runtime -- 321 * thus wasting non-paged memory. 322 */ 323 status = acpi_purge_cached_objects(); 324 325 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; 326 return_ACPI_STATUS(status); 327 } 328 329 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects) 330