utxface.c revision 193251
1/****************************************************************************** 2 * 3 * Module Name: utxface - External interfaces for "global" ACPI functions 4 * $Revision: 1.125 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117 118#define __UTXFACE_C__ 119 120#include "acpi.h" 121#include "acevents.h" 122#include "acnamesp.h" 123#include "acdebug.h" 124 125#define _COMPONENT ACPI_UTILITIES 126 ACPI_MODULE_NAME ("utxface") 127 128 129/******************************************************************************* 130 * 131 * FUNCTION: AcpiInitializeSubsystem 132 * 133 * PARAMETERS: None 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Initializes all global variables. This is the first function 138 * called, so any early initialization belongs here. 139 * 140 ******************************************************************************/ 141 142ACPI_STATUS 143AcpiInitializeSubsystem ( 144 void) 145{ 146 ACPI_STATUS Status; 147 148 149 ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem); 150 151 152 AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE; 153 ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ()); 154 155 /* Initialize the OS-Dependent layer */ 156 157 Status = AcpiOsInitialize (); 158 if (ACPI_FAILURE (Status)) 159 { 160 ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization")); 161 return_ACPI_STATUS (Status); 162 } 163 164 /* Initialize all globals used by the subsystem */ 165 166 AcpiUtInitGlobals (); 167 168 /* Create the default mutex objects */ 169 170 Status = AcpiUtMutexInitialize (); 171 if (ACPI_FAILURE (Status)) 172 { 173 ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation")); 174 return_ACPI_STATUS (Status); 175 } 176 177 /* 178 * Initialize the namespace manager and 179 * the root of the namespace tree 180 */ 181 Status = AcpiNsRootInitialize (); 182 if (ACPI_FAILURE (Status)) 183 { 184 ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization")); 185 return_ACPI_STATUS (Status); 186 } 187 188 /* If configured, initialize the AML debugger */ 189 190 ACPI_DEBUGGER_EXEC (Status = AcpiDbInitialize ()); 191 return_ACPI_STATUS (Status); 192} 193 194ACPI_EXPORT_SYMBOL (AcpiInitializeSubsystem) 195 196 197/******************************************************************************* 198 * 199 * FUNCTION: AcpiEnableSubsystem 200 * 201 * PARAMETERS: Flags - Init/enable Options 202 * 203 * RETURN: Status 204 * 205 * DESCRIPTION: Completes the subsystem initialization including hardware. 206 * Puts system into ACPI mode if it isn't already. 207 * 208 ******************************************************************************/ 209 210ACPI_STATUS 211AcpiEnableSubsystem ( 212 UINT32 Flags) 213{ 214 ACPI_STATUS Status = AE_OK; 215 216 217 ACPI_FUNCTION_TRACE (AcpiEnableSubsystem); 218 219 220 /* Enable ACPI mode */ 221 222 if (!(Flags & ACPI_NO_ACPI_ENABLE)) 223 { 224 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n")); 225 226 AcpiGbl_OriginalMode = AcpiHwGetMode(); 227 228 Status = AcpiEnable (); 229 if (ACPI_FAILURE (Status)) 230 { 231 ACPI_WARNING ((AE_INFO, "AcpiEnable failed")); 232 return_ACPI_STATUS (Status); 233 } 234 } 235 236 /* 237 * Install the default OpRegion handlers. These are installed unless 238 * other handlers have already been installed via the 239 * InstallAddressSpaceHandler interface. 240 */ 241 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 242 { 243 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 244 "[Init] Installing default address space handlers\n")); 245 246 Status = AcpiEvInstallRegionHandlers (); 247 if (ACPI_FAILURE (Status)) 248 { 249 return_ACPI_STATUS (Status); 250 } 251 } 252 253 /* 254 * Initialize ACPI Event handling (Fixed and General Purpose) 255 * 256 * Note1: We must have the hardware and events initialized before we can 257 * execute any control methods safely. Any control method can require 258 * ACPI hardware support, so the hardware must be fully initialized before 259 * any method execution! 260 * 261 * Note2: Fixed events are initialized and enabled here. GPEs are 262 * initialized, but cannot be enabled until after the hardware is 263 * completely initialized (SCI and GlobalLock activated) 264 */ 265 if (!(Flags & ACPI_NO_EVENT_INIT)) 266 { 267 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 268 "[Init] Initializing ACPI events\n")); 269 270 Status = AcpiEvInitializeEvents (); 271 if (ACPI_FAILURE (Status)) 272 { 273 return_ACPI_STATUS (Status); 274 } 275 } 276 277 /* 278 * Install the SCI handler and Global Lock handler. This completes the 279 * hardware initialization. 280 */ 281 if (!(Flags & ACPI_NO_HANDLER_INIT)) 282 { 283 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 284 "[Init] Installing SCI/GL handlers\n")); 285 286 Status = AcpiEvInstallXruptHandlers (); 287 if (ACPI_FAILURE (Status)) 288 { 289 return_ACPI_STATUS (Status); 290 } 291 } 292 293 /* 294 * Complete the GPE initialization for the GPE blocks defined in the FADT 295 * (GPE block 0 and 1). 296 * 297 * Note1: This is where the _PRW methods are executed for the GPEs. These 298 * methods can only be executed after the SCI and Global Lock handlers are 299 * installed and initialized. 300 * 301 * Note2: Currently, there seems to be no need to run the _REG methods 302 * before execution of the _PRW methods and enabling of the GPEs. 303 */ 304 if (!(Flags & ACPI_NO_EVENT_INIT)) 305 { 306 Status = AcpiEvInstallFadtGpes (); 307 if (ACPI_FAILURE (Status)) 308 { 309 return (Status); 310 } 311 } 312 313 return_ACPI_STATUS (Status); 314} 315 316ACPI_EXPORT_SYMBOL (AcpiEnableSubsystem) 317 318 319/******************************************************************************* 320 * 321 * FUNCTION: AcpiInitializeObjects 322 * 323 * PARAMETERS: Flags - Init/enable Options 324 * 325 * RETURN: Status 326 * 327 * DESCRIPTION: Completes namespace initialization by initializing device 328 * objects and executing AML code for Regions, buffers, etc. 329 * 330 ******************************************************************************/ 331 332ACPI_STATUS 333AcpiInitializeObjects ( 334 UINT32 Flags) 335{ 336 ACPI_STATUS Status = AE_OK; 337 338 339 ACPI_FUNCTION_TRACE (AcpiInitializeObjects); 340 341 342 /* 343 * Run all _REG methods 344 * 345 * Note: Any objects accessed by the _REG methods will be automatically 346 * initialized, even if they contain executable AML (see the call to 347 * AcpiNsInitializeObjects below). 348 */ 349 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 350 { 351 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 352 "[Init] Executing _REG OpRegion methods\n")); 353 354 Status = AcpiEvInitializeOpRegions (); 355 if (ACPI_FAILURE (Status)) 356 { 357 return_ACPI_STATUS (Status); 358 } 359 } 360 361 /* 362 * Initialize the objects that remain uninitialized. This runs the 363 * executable AML that may be part of the declaration of these objects: 364 * OperationRegions, BufferFields, Buffers, and Packages. 365 */ 366 if (!(Flags & ACPI_NO_OBJECT_INIT)) 367 { 368 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 369 "[Init] Completing Initialization of ACPI Objects\n")); 370 371 Status = AcpiNsInitializeObjects (); 372 if (ACPI_FAILURE (Status)) 373 { 374 return_ACPI_STATUS (Status); 375 } 376 } 377 378 /* 379 * Initialize all device objects in the namespace. This runs the device 380 * _STA and _INI methods. 381 */ 382 if (!(Flags & ACPI_NO_DEVICE_INIT)) 383 { 384 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 385 "[Init] Initializing ACPI Devices\n")); 386 387 Status = AcpiNsInitializeDevices (); 388 if (ACPI_FAILURE (Status)) 389 { 390 return_ACPI_STATUS (Status); 391 } 392 } 393 394 /* 395 * Empty the caches (delete the cached objects) on the assumption that 396 * the table load filled them up more than they will be at runtime -- 397 * thus wasting non-paged memory. 398 */ 399 Status = AcpiPurgeCachedObjects (); 400 401 AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK; 402 return_ACPI_STATUS (Status); 403} 404 405ACPI_EXPORT_SYMBOL (AcpiInitializeObjects) 406 407 408/******************************************************************************* 409 * 410 * FUNCTION: AcpiTerminate 411 * 412 * PARAMETERS: None 413 * 414 * RETURN: Status 415 * 416 * DESCRIPTION: Shutdown the ACPI subsystem. Release all resources. 417 * 418 ******************************************************************************/ 419 420ACPI_STATUS 421AcpiTerminate ( 422 void) 423{ 424 ACPI_STATUS Status; 425 426 427 ACPI_FUNCTION_TRACE (AcpiTerminate); 428 429 430 /* Terminate the AML Debugger if present */ 431 432 ACPI_DEBUGGER_EXEC(AcpiGbl_DbTerminateThreads = TRUE); 433 434 /* Shutdown and free all resources */ 435 436 AcpiUtSubsystemShutdown (); 437 438 439 /* Free the mutex objects */ 440 441 AcpiUtMutexTerminate (); 442 443 444#ifdef ACPI_DEBUGGER 445 446 /* Shut down the debugger */ 447 448 AcpiDbTerminate (); 449#endif 450 451 /* Now we can shutdown the OS-dependent layer */ 452 453 Status = AcpiOsTerminate (); 454 return_ACPI_STATUS (Status); 455} 456 457ACPI_EXPORT_SYMBOL (AcpiTerminate) 458 459 460/******************************************************************************* 461 * 462 * FUNCTION: AcpiSubsystemStatus 463 * 464 * PARAMETERS: None 465 * 466 * RETURN: Status of the ACPI subsystem 467 * 468 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this 469 * before making any other calls, to ensure the subsystem 470 * initialized successfully. 471 * 472 ******************************************************************************/ 473 474ACPI_STATUS 475AcpiSubsystemStatus ( 476 void) 477{ 478 479 if (AcpiGbl_StartupFlags & ACPI_INITIALIZED_OK) 480 { 481 return (AE_OK); 482 } 483 else 484 { 485 return (AE_ERROR); 486 } 487} 488 489ACPI_EXPORT_SYMBOL (AcpiSubsystemStatus) 490 491 492/******************************************************************************* 493 * 494 * FUNCTION: AcpiGetSystemInfo 495 * 496 * PARAMETERS: OutBuffer - A buffer to receive the resources for the 497 * device 498 * 499 * RETURN: Status - the status of the call 500 * 501 * DESCRIPTION: This function is called to get information about the current 502 * state of the ACPI subsystem. It will return system information 503 * in the OutBuffer. 504 * 505 * If the function fails an appropriate status will be returned 506 * and the value of OutBuffer is undefined. 507 * 508 ******************************************************************************/ 509 510ACPI_STATUS 511AcpiGetSystemInfo ( 512 ACPI_BUFFER *OutBuffer) 513{ 514 ACPI_SYSTEM_INFO *InfoPtr; 515 ACPI_STATUS Status; 516 517 518 ACPI_FUNCTION_TRACE (AcpiGetSystemInfo); 519 520 521 /* Parameter validation */ 522 523 Status = AcpiUtValidateBuffer (OutBuffer); 524 if (ACPI_FAILURE (Status)) 525 { 526 return_ACPI_STATUS (Status); 527 } 528 529 /* Validate/Allocate/Clear caller buffer */ 530 531 Status = AcpiUtInitializeBuffer (OutBuffer, sizeof (ACPI_SYSTEM_INFO)); 532 if (ACPI_FAILURE (Status)) 533 { 534 return_ACPI_STATUS (Status); 535 } 536 537 /* 538 * Populate the return buffer 539 */ 540 InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer; 541 542 InfoPtr->AcpiCaVersion = ACPI_CA_VERSION; 543 544 /* System flags (ACPI capabilities) */ 545 546 InfoPtr->Flags = ACPI_SYS_MODE_ACPI; 547 548 /* Timer resolution - 24 or 32 bits */ 549 550 if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 551 { 552 InfoPtr->TimerResolution = 24; 553 } 554 else 555 { 556 InfoPtr->TimerResolution = 32; 557 } 558 559 /* Clear the reserved fields */ 560 561 InfoPtr->Reserved1 = 0; 562 InfoPtr->Reserved2 = 0; 563 564 /* Current debug levels */ 565 566 InfoPtr->DebugLayer = AcpiDbgLayer; 567 InfoPtr->DebugLevel = AcpiDbgLevel; 568 569 return_ACPI_STATUS (AE_OK); 570} 571 572ACPI_EXPORT_SYMBOL (AcpiGetSystemInfo) 573 574 575/***************************************************************************** 576 * 577 * FUNCTION: AcpiInstallInitializationHandler 578 * 579 * PARAMETERS: Handler - Callback procedure 580 * Function - Not (currently) used, see below 581 * 582 * RETURN: Status 583 * 584 * DESCRIPTION: Install an initialization handler 585 * 586 * TBD: When a second function is added, must save the Function also. 587 * 588 ****************************************************************************/ 589 590ACPI_STATUS 591AcpiInstallInitializationHandler ( 592 ACPI_INIT_HANDLER Handler, 593 UINT32 Function) 594{ 595 596 if (!Handler) 597 { 598 return (AE_BAD_PARAMETER); 599 } 600 601 if (AcpiGbl_InitHandler) 602 { 603 return (AE_ALREADY_EXISTS); 604 } 605 606 AcpiGbl_InitHandler = Handler; 607 return AE_OK; 608} 609 610ACPI_EXPORT_SYMBOL (AcpiInstallInitializationHandler) 611 612 613/***************************************************************************** 614 * 615 * FUNCTION: AcpiPurgeCachedObjects 616 * 617 * PARAMETERS: None 618 * 619 * RETURN: Status 620 * 621 * DESCRIPTION: Empty all caches (delete the cached objects) 622 * 623 ****************************************************************************/ 624 625ACPI_STATUS 626AcpiPurgeCachedObjects ( 627 void) 628{ 629 ACPI_FUNCTION_TRACE (AcpiPurgeCachedObjects); 630 631 (void) AcpiOsPurgeCache (AcpiGbl_StateCache); 632 (void) AcpiOsPurgeCache (AcpiGbl_OperandCache); 633 (void) AcpiOsPurgeCache (AcpiGbl_PsNodeCache); 634 (void) AcpiOsPurgeCache (AcpiGbl_PsNodeExtCache); 635 return_ACPI_STATUS (AE_OK); 636} 637 638ACPI_EXPORT_SYMBOL (AcpiPurgeCachedObjects) 639