1 /****************************************************************************** 2 * 3 * Module Name: utxfinit - External interfaces for ACPICA initialization 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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.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 AcpiExec only */ 57 void 58 AeDoObjectOverrides ( 59 void); 60 61 62 /******************************************************************************* 63 * 64 * FUNCTION: AcpiInitializeSubsystem 65 * 66 * PARAMETERS: None 67 * 68 * RETURN: Status 69 * 70 * DESCRIPTION: Initializes all global variables. This is the first function 71 * called, so any early initialization belongs here. 72 * 73 ******************************************************************************/ 74 75 ACPI_STATUS 76 AcpiInitializeSubsystem ( 77 void) 78 { 79 ACPI_STATUS Status; 80 81 82 ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem); 83 84 85 AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE; 86 ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ()); 87 88 /* Initialize the OS-Dependent layer */ 89 90 Status = AcpiOsInitialize (); 91 if (ACPI_FAILURE (Status)) 92 { 93 ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization")); 94 return_ACPI_STATUS (Status); 95 } 96 97 /* Initialize all globals used by the subsystem */ 98 99 Status = AcpiUtInitGlobals (); 100 if (ACPI_FAILURE (Status)) 101 { 102 ACPI_EXCEPTION ((AE_INFO, Status, "During initialization of globals")); 103 return_ACPI_STATUS (Status); 104 } 105 106 /* Create the default mutex objects */ 107 108 Status = AcpiUtMutexInitialize (); 109 if (ACPI_FAILURE (Status)) 110 { 111 ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation")); 112 return_ACPI_STATUS (Status); 113 } 114 115 /* 116 * Initialize the namespace manager and 117 * the root of the namespace tree 118 */ 119 Status = AcpiNsRootInitialize (); 120 if (ACPI_FAILURE (Status)) 121 { 122 ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization")); 123 return_ACPI_STATUS (Status); 124 } 125 126 /* Initialize the global OSI interfaces list with the static names */ 127 128 Status = AcpiUtInitializeInterfaces (); 129 if (ACPI_FAILURE (Status)) 130 { 131 ACPI_EXCEPTION ((AE_INFO, Status, "During OSI interfaces initialization")); 132 return_ACPI_STATUS (Status); 133 } 134 135 if (!AcpiGbl_OverrideDefaultRegionHandlers) 136 { 137 /* 138 * Install the default operation region handlers. These are the 139 * handlers that are defined by the ACPI specification to be 140 * "always accessible" -- namely, SystemMemory, SystemIO, and 141 * PCI_Config. This also means that no _REG methods need to be 142 * run for these address spaces. We need to have these handlers 143 * installed before any AML code can be executed, especially any 144 * module-level code (11/2015). 145 */ 146 Status = AcpiEvInstallRegionHandlers (); 147 if (ACPI_FAILURE (Status)) 148 { 149 ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization")); 150 return_ACPI_STATUS (Status); 151 } 152 } 153 154 return_ACPI_STATUS (AE_OK); 155 } 156 157 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeSubsystem) 158 159 160 /******************************************************************************* 161 * 162 * FUNCTION: AcpiEnableSubsystem 163 * 164 * PARAMETERS: Flags - Init/enable Options 165 * 166 * RETURN: Status 167 * 168 * DESCRIPTION: Completes the subsystem initialization including hardware. 169 * Puts system into ACPI mode if it isn't already. 170 * 171 ******************************************************************************/ 172 173 ACPI_STATUS 174 AcpiEnableSubsystem ( 175 UINT32 Flags) 176 { 177 ACPI_STATUS Status = AE_OK; 178 179 180 ACPI_FUNCTION_TRACE (AcpiEnableSubsystem); 181 182 183 /* 184 * The early initialization phase is complete. The namespace is loaded, 185 * and we can now support address spaces other than Memory, I/O, and 186 * PCI_Config. 187 */ 188 AcpiGbl_EarlyInitialization = FALSE; 189 190 if (AcpiGbl_OverrideDefaultRegionHandlers) 191 { 192 /* 193 * Install the default operation region handlers. These are the 194 * handlers that are defined by the ACPI specification to be 195 * "always accessible" -- namely, SystemMemory, SystemIO, and 196 * PCI_Config. This also means that no _REG methods need to be 197 * run for these address spaces. We need to have these handlers 198 * installed before any AML code can be executed, especially any 199 * module-level code (11/2015). 200 */ 201 Status = AcpiEvInstallRegionHandlers (); 202 if (ACPI_FAILURE (Status)) 203 { 204 ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization")); 205 return_ACPI_STATUS (Status); 206 } 207 } 208 209 210 #if (!ACPI_REDUCED_HARDWARE) 211 212 /* Enable ACPI mode */ 213 214 if (!(Flags & ACPI_NO_ACPI_ENABLE)) 215 { 216 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n")); 217 218 AcpiGbl_OriginalMode = AcpiHwGetMode(); 219 220 Status = AcpiEnable (); 221 if (ACPI_FAILURE (Status)) 222 { 223 ACPI_WARNING ((AE_INFO, "AcpiEnable failed")); 224 return_ACPI_STATUS (Status); 225 } 226 } 227 228 /* 229 * Obtain a permanent mapping for the FACS. This is required for the 230 * Global Lock and the Firmware Waking Vector 231 */ 232 if (!(Flags & ACPI_NO_FACS_INIT)) 233 { 234 Status = AcpiTbInitializeFacs (); 235 if (ACPI_FAILURE (Status)) 236 { 237 ACPI_WARNING ((AE_INFO, "Could not map the FACS table")); 238 return_ACPI_STATUS (Status); 239 } 240 } 241 242 /* 243 * Initialize ACPI Event handling (Fixed and General Purpose) 244 * 245 * Note1: We must have the hardware and events initialized before we can 246 * execute any control methods safely. Any control method can require 247 * ACPI hardware support, so the hardware must be fully initialized before 248 * any method execution! 249 * 250 * Note2: Fixed events are initialized and enabled here. GPEs are 251 * initialized, but cannot be enabled until after the hardware is 252 * completely initialized (SCI and GlobalLock activated) and the various 253 * initialization control methods are run (_REG, _STA, _INI) on the 254 * entire namespace. 255 */ 256 if (!(Flags & ACPI_NO_EVENT_INIT)) 257 { 258 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 259 "[Init] Initializing ACPI events\n")); 260 261 Status = AcpiEvInitializeEvents (); 262 if (ACPI_FAILURE (Status)) 263 { 264 return_ACPI_STATUS (Status); 265 } 266 } 267 268 /* 269 * Install the SCI handler and Global Lock handler. This completes the 270 * hardware initialization. 271 */ 272 if (!(Flags & ACPI_NO_HANDLER_INIT)) 273 { 274 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 275 "[Init] Installing SCI/GL handlers\n")); 276 277 Status = AcpiEvInstallXruptHandlers (); 278 if (ACPI_FAILURE (Status)) 279 { 280 return_ACPI_STATUS (Status); 281 } 282 } 283 284 #endif /* !ACPI_REDUCED_HARDWARE */ 285 286 return_ACPI_STATUS (Status); 287 } 288 289 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem) 290 291 292 /******************************************************************************* 293 * 294 * FUNCTION: AcpiInitializeObjects 295 * 296 * PARAMETERS: Flags - Init/enable Options 297 * 298 * RETURN: Status 299 * 300 * DESCRIPTION: Completes namespace initialization by initializing device 301 * objects and executing AML code for Regions, buffers, etc. 302 * 303 ******************************************************************************/ 304 305 ACPI_STATUS 306 AcpiInitializeObjects ( 307 UINT32 Flags) 308 { 309 ACPI_STATUS Status = AE_OK; 310 311 312 ACPI_FUNCTION_TRACE (AcpiInitializeObjects); 313 314 315 /* 316 * Run all _REG methods 317 * 318 * Note: Any objects accessed by the _REG methods will be automatically 319 * initialized, even if they contain executable AML (see the call to 320 * AcpiNsInitializeObjects below). 321 */ 322 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 323 { 324 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 325 "[Init] Executing _REG OpRegion methods\n")); 326 327 Status = AcpiEvInitializeOpRegions (); 328 if (ACPI_FAILURE (Status)) 329 { 330 return_ACPI_STATUS (Status); 331 } 332 } 333 334 #ifdef ACPI_EXEC_APP 335 /* 336 * This call implements the "initialization file" option for AcpiExec. 337 * This is the precise point that we want to perform the overrides. 338 */ 339 AeDoObjectOverrides (); 340 #endif 341 342 /* 343 * Execute any module-level code that was detected during the table load 344 * phase. Although illegal since ACPI 2.0, there are many machines that 345 * contain this type of code. Each block of detected executable AML code 346 * outside of any control method is wrapped with a temporary control 347 * method object and placed on a global list. The methods on this list 348 * are executed below. 349 * 350 * This case executes the module-level code for all tables only after 351 * all of the tables have been loaded. It is a legacy option and is 352 * not compatible with other ACPI implementations. See AcpiNsLoadTable. 353 */ 354 if (AcpiGbl_GroupModuleLevelCode) 355 { 356 AcpiNsExecModuleCodeList (); 357 } 358 359 /* 360 * Initialize the objects that remain uninitialized. This runs the 361 * executable AML that may be part of the declaration of these objects: 362 * OperationRegions, BufferFields, Buffers, and Packages. 363 */ 364 if (!(Flags & ACPI_NO_OBJECT_INIT)) 365 { 366 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 367 "[Init] Completing Initialization of ACPI Objects\n")); 368 369 Status = AcpiNsInitializeObjects (); 370 if (ACPI_FAILURE (Status)) 371 { 372 return_ACPI_STATUS (Status); 373 } 374 } 375 376 /* 377 * Initialize all device objects in the namespace. This runs the device 378 * _STA and _INI methods. 379 */ 380 if (!(Flags & ACPI_NO_DEVICE_INIT)) 381 { 382 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 383 "[Init] Initializing ACPI Devices\n")); 384 385 Status = AcpiNsInitializeDevices (); 386 if (ACPI_FAILURE (Status)) 387 { 388 return_ACPI_STATUS (Status); 389 } 390 } 391 392 /* 393 * Empty the caches (delete the cached objects) on the assumption that 394 * the table load filled them up more than they will be at runtime -- 395 * thus wasting non-paged memory. 396 */ 397 Status = AcpiPurgeCachedObjects (); 398 399 AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK; 400 return_ACPI_STATUS (Status); 401 } 402 403 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects) 404