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 return_ACPI_STATUS (AE_OK); 136 } 137 138 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeSubsystem) 139 140 141 /******************************************************************************* 142 * 143 * FUNCTION: AcpiEnableSubsystem 144 * 145 * PARAMETERS: Flags - Init/enable Options 146 * 147 * RETURN: Status 148 * 149 * DESCRIPTION: Completes the subsystem initialization including hardware. 150 * Puts system into ACPI mode if it isn't already. 151 * 152 ******************************************************************************/ 153 154 ACPI_STATUS 155 AcpiEnableSubsystem ( 156 UINT32 Flags) 157 { 158 ACPI_STATUS Status = AE_OK; 159 160 161 ACPI_FUNCTION_TRACE (AcpiEnableSubsystem); 162 163 164 /* 165 * The early initialization phase is complete. The namespace is loaded, 166 * and we can now support address spaces other than Memory, I/O, and 167 * PCI_Config. 168 */ 169 AcpiGbl_EarlyInitialization = FALSE; 170 171 /* 172 * Install the default operation region handlers. These are the 173 * handlers that are defined by the ACPI specification to be 174 * "always accessible" -- namely, SystemMemory, SystemIO, and 175 * PCI_Config. This also means that no _REG methods need to be 176 * run for these address spaces. We need to have these handlers 177 * installed before any AML code can be executed, especially any 178 * module-level code (11/2015). 179 */ 180 if (!AcpiGbl_GroupModuleLevelCode) 181 { 182 Status = AcpiEvInstallRegionHandlers (); 183 if (ACPI_FAILURE (Status)) 184 { 185 ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization")); 186 return_ACPI_STATUS (Status); 187 } 188 } 189 190 #if (!ACPI_REDUCED_HARDWARE) 191 192 /* Enable ACPI mode */ 193 194 if (!(Flags & ACPI_NO_ACPI_ENABLE)) 195 { 196 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n")); 197 198 AcpiGbl_OriginalMode = AcpiHwGetMode(); 199 200 Status = AcpiEnable (); 201 if (ACPI_FAILURE (Status)) 202 { 203 ACPI_WARNING ((AE_INFO, "AcpiEnable failed")); 204 return_ACPI_STATUS (Status); 205 } 206 } 207 208 /* 209 * Obtain a permanent mapping for the FACS. This is required for the 210 * Global Lock and the Firmware Waking Vector 211 */ 212 if (!(Flags & ACPI_NO_FACS_INIT)) 213 { 214 Status = AcpiTbInitializeFacs (); 215 if (ACPI_FAILURE (Status)) 216 { 217 ACPI_WARNING ((AE_INFO, "Could not map the FACS table")); 218 return_ACPI_STATUS (Status); 219 } 220 } 221 222 /* 223 * Initialize ACPI Event handling (Fixed and General Purpose) 224 * 225 * Note1: We must have the hardware and events initialized before we can 226 * execute any control methods safely. Any control method can require 227 * ACPI hardware support, so the hardware must be fully initialized before 228 * any method execution! 229 * 230 * Note2: Fixed events are initialized and enabled here. GPEs are 231 * initialized, but cannot be enabled until after the hardware is 232 * completely initialized (SCI and GlobalLock activated) and the various 233 * initialization control methods are run (_REG, _STA, _INI) on the 234 * entire namespace. 235 */ 236 if (!(Flags & ACPI_NO_EVENT_INIT)) 237 { 238 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 239 "[Init] Initializing ACPI events\n")); 240 241 Status = AcpiEvInitializeEvents (); 242 if (ACPI_FAILURE (Status)) 243 { 244 return_ACPI_STATUS (Status); 245 } 246 } 247 248 /* 249 * Install the SCI handler and Global Lock handler. This completes the 250 * hardware initialization. 251 */ 252 if (!(Flags & ACPI_NO_HANDLER_INIT)) 253 { 254 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 255 "[Init] Installing SCI/GL handlers\n")); 256 257 Status = AcpiEvInstallXruptHandlers (); 258 if (ACPI_FAILURE (Status)) 259 { 260 return_ACPI_STATUS (Status); 261 } 262 } 263 264 #endif /* !ACPI_REDUCED_HARDWARE */ 265 266 return_ACPI_STATUS (Status); 267 } 268 269 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem) 270 271 272 /******************************************************************************* 273 * 274 * FUNCTION: AcpiInitializeObjects 275 * 276 * PARAMETERS: Flags - Init/enable Options 277 * 278 * RETURN: Status 279 * 280 * DESCRIPTION: Completes namespace initialization by initializing device 281 * objects and executing AML code for Regions, buffers, etc. 282 * 283 ******************************************************************************/ 284 285 ACPI_STATUS 286 AcpiInitializeObjects ( 287 UINT32 Flags) 288 { 289 ACPI_STATUS Status = AE_OK; 290 291 292 ACPI_FUNCTION_TRACE (AcpiInitializeObjects); 293 294 295 #ifdef ACPI_EXEC_APP 296 /* 297 * This call implements the "initialization file" option for AcpiExec. 298 * This is the precise point that we want to perform the overrides. 299 */ 300 AeDoObjectOverrides (); 301 #endif 302 303 /* 304 * Execute any module-level code that was detected during the table load 305 * phase. Although illegal since ACPI 2.0, there are many machines that 306 * contain this type of code. Each block of detected executable AML code 307 * outside of any control method is wrapped with a temporary control 308 * method object and placed on a global list. The methods on this list 309 * are executed below. 310 * 311 * This case executes the module-level code for all tables only after 312 * all of the tables have been loaded. It is a legacy option and is 313 * not compatible with other ACPI implementations. See AcpiNsLoadTable. 314 */ 315 if (AcpiGbl_GroupModuleLevelCode) 316 { 317 AcpiNsExecModuleCodeList (); 318 } 319 320 /* 321 * Initialize the objects that remain uninitialized. This runs the 322 * executable AML that may be part of the declaration of these objects: 323 * OperationRegions, BufferFields, Buffers, and Packages. 324 */ 325 if (!(Flags & ACPI_NO_OBJECT_INIT)) 326 { 327 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 328 "[Init] Completing Initialization of ACPI Objects\n")); 329 330 Status = AcpiNsInitializeObjects (); 331 if (ACPI_FAILURE (Status)) 332 { 333 return_ACPI_STATUS (Status); 334 } 335 } 336 337 AcpiGbl_NamespaceInitialized = TRUE; 338 339 /* 340 * Initialize all device/region objects in the namespace. This runs 341 * the device _STA and _INI methods and region _REG methods. 342 */ 343 if (!(Flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) 344 { 345 Status = AcpiNsInitializeDevices (Flags); 346 if (ACPI_FAILURE (Status)) 347 { 348 return_ACPI_STATUS (Status); 349 } 350 } 351 352 /* 353 * Empty the caches (delete the cached objects) on the assumption that 354 * the table load filled them up more than they will be at runtime -- 355 * thus wasting non-paged memory. 356 */ 357 Status = AcpiPurgeCachedObjects (); 358 359 AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK; 360 return_ACPI_STATUS (Status); 361 } 362 363 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects) 364