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 #if (!ACPI_REDUCED_HARDWARE) 172 173 /* Enable ACPI mode */ 174 175 if (!(Flags & ACPI_NO_ACPI_ENABLE)) 176 { 177 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n")); 178 179 AcpiGbl_OriginalMode = AcpiHwGetMode(); 180 181 Status = AcpiEnable (); 182 if (ACPI_FAILURE (Status)) 183 { 184 ACPI_WARNING ((AE_INFO, "AcpiEnable failed")); 185 return_ACPI_STATUS (Status); 186 } 187 } 188 189 /* 190 * Obtain a permanent mapping for the FACS. This is required for the 191 * Global Lock and the Firmware Waking Vector 192 */ 193 if (!(Flags & ACPI_NO_FACS_INIT)) 194 { 195 Status = AcpiTbInitializeFacs (); 196 if (ACPI_FAILURE (Status)) 197 { 198 ACPI_WARNING ((AE_INFO, "Could not map the FACS table")); 199 return_ACPI_STATUS (Status); 200 } 201 } 202 203 /* 204 * Initialize ACPI Event handling (Fixed and General Purpose) 205 * 206 * Note1: We must have the hardware and events initialized before we can 207 * execute any control methods safely. Any control method can require 208 * ACPI hardware support, so the hardware must be fully initialized before 209 * any method execution! 210 * 211 * Note2: Fixed events are initialized and enabled here. GPEs are 212 * initialized, but cannot be enabled until after the hardware is 213 * completely initialized (SCI and GlobalLock activated) and the various 214 * initialization control methods are run (_REG, _STA, _INI) on the 215 * entire namespace. 216 */ 217 if (!(Flags & ACPI_NO_EVENT_INIT)) 218 { 219 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 220 "[Init] Initializing ACPI events\n")); 221 222 Status = AcpiEvInitializeEvents (); 223 if (ACPI_FAILURE (Status)) 224 { 225 return_ACPI_STATUS (Status); 226 } 227 } 228 229 /* 230 * Install the SCI handler and Global Lock handler. This completes the 231 * hardware initialization. 232 */ 233 if (!(Flags & ACPI_NO_HANDLER_INIT)) 234 { 235 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 236 "[Init] Installing SCI/GL handlers\n")); 237 238 Status = AcpiEvInstallXruptHandlers (); 239 if (ACPI_FAILURE (Status)) 240 { 241 return_ACPI_STATUS (Status); 242 } 243 } 244 245 #endif /* !ACPI_REDUCED_HARDWARE */ 246 247 return_ACPI_STATUS (Status); 248 } 249 250 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem) 251 252 253 /******************************************************************************* 254 * 255 * FUNCTION: AcpiInitializeObjects 256 * 257 * PARAMETERS: Flags - Init/enable Options 258 * 259 * RETURN: Status 260 * 261 * DESCRIPTION: Completes namespace initialization by initializing device 262 * objects and executing AML code for Regions, buffers, etc. 263 * 264 ******************************************************************************/ 265 266 ACPI_STATUS 267 AcpiInitializeObjects ( 268 UINT32 Flags) 269 { 270 ACPI_STATUS Status = AE_OK; 271 272 273 ACPI_FUNCTION_TRACE (AcpiInitializeObjects); 274 275 276 #ifdef ACPI_EXEC_APP 277 /* 278 * This call implements the "initialization file" option for AcpiExec. 279 * This is the precise point that we want to perform the overrides. 280 */ 281 AeDoObjectOverrides (); 282 #endif 283 284 /* 285 * Execute any module-level code that was detected during the table load 286 * phase. Although illegal since ACPI 2.0, there are many machines that 287 * contain this type of code. Each block of detected executable AML code 288 * outside of any control method is wrapped with a temporary control 289 * method object and placed on a global list. The methods on this list 290 * are executed below. 291 * 292 * This case executes the module-level code for all tables only after 293 * all of the tables have been loaded. It is a legacy option and is 294 * not compatible with other ACPI implementations. See AcpiNsLoadTable. 295 */ 296 if (AcpiGbl_GroupModuleLevelCode) 297 { 298 AcpiNsExecModuleCodeList (); 299 300 /* 301 * Initialize the objects that remain uninitialized. This 302 * runs the executable AML that may be part of the 303 * declaration of these objects: 304 * OperationRegions, BufferFields, Buffers, and Packages. 305 */ 306 if (!(Flags & ACPI_NO_OBJECT_INIT)) 307 { 308 Status = AcpiNsInitializeObjects (); 309 if (ACPI_FAILURE (Status)) 310 { 311 return_ACPI_STATUS (Status); 312 } 313 } 314 } 315 316 /* 317 * Initialize all device/region objects in the namespace. This runs 318 * the device _STA and _INI methods and region _REG methods. 319 */ 320 if (!(Flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) 321 { 322 Status = AcpiNsInitializeDevices (Flags); 323 if (ACPI_FAILURE (Status)) 324 { 325 return_ACPI_STATUS (Status); 326 } 327 } 328 329 /* 330 * Empty the caches (delete the cached objects) on the assumption that 331 * the table load filled them up more than they will be at runtime -- 332 * thus wasting non-paged memory. 333 */ 334 Status = AcpiPurgeCachedObjects (); 335 336 AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK; 337 return_ACPI_STATUS (Status); 338 } 339 340 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects) 341