utosi.c revision 213806
1/****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116#define __UTOSI_C__ 117 118#include <contrib/dev/acpica/include/acpi.h> 119#include <contrib/dev/acpica/include/accommon.h> 120 121 122#define _COMPONENT ACPI_UTILITIES 123 ACPI_MODULE_NAME ("utosi") 124 125/* 126 * Strings supported by the _OSI predefined control method (which is 127 * implemented internally within this module.) 128 * 129 * March 2009: Removed "Linux" as this host no longer wants to respond true 130 * for this string. Basically, the only safe OS strings are windows-related 131 * and in many or most cases represent the only test path within the 132 * BIOS-provided ASL code. 133 * 134 * The last element of each entry is used to track the newest version of 135 * Windows that the BIOS has requested. 136 */ 137static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 138{ 139 /* Operating System Vendor Strings */ 140 141 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 142 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 143 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 144 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 145 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 146 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 147 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 148 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 149 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 150 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 151 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 152 153 /* Feature Group Strings */ 154 155 {"Extended Address Space Descriptor", NULL, 0, 0} 156 157 /* 158 * All "optional" feature group strings (features that are implemented 159 * by the host) should be dynamically added by the host via 160 * AcpiInstallInterface and should not be manually added here. 161 * 162 * Examples of optional feature group strings: 163 * 164 * "Module Device" 165 * "Processor Device" 166 * "3.0 Thermal Model" 167 * "3.0 _SCP Extensions" 168 * "Processor Aggregator Device" 169 */ 170}; 171 172 173/******************************************************************************* 174 * 175 * FUNCTION: AcpiUtInitializeInterfaces 176 * 177 * PARAMETERS: None 178 * 179 * RETURN: Status 180 * 181 * DESCRIPTION: Initialize the global _OSI supported interfaces list 182 * 183 ******************************************************************************/ 184 185ACPI_STATUS 186AcpiUtInitializeInterfaces ( 187 void) 188{ 189 UINT32 i; 190 191 192 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 193 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 194 195 /* Link the static list of supported interfaces */ 196 197 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 198 { 199 AcpiDefaultSupportedInterfaces[i].Next = 200 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 201 } 202 203 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 204 return (AE_OK); 205} 206 207 208/******************************************************************************* 209 * 210 * FUNCTION: AcpiUtInterfaceTerminate 211 * 212 * PARAMETERS: None 213 * 214 * RETURN: None 215 * 216 * DESCRIPTION: Delete all interfaces in the global list. Sets 217 * AcpiGbl_SupportedInterfaces to NULL. 218 * 219 ******************************************************************************/ 220 221void 222AcpiUtInterfaceTerminate ( 223 void) 224{ 225 ACPI_INTERFACE_INFO *NextInterface; 226 227 228 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 229 NextInterface = AcpiGbl_SupportedInterfaces; 230 231 while (NextInterface) 232 { 233 AcpiGbl_SupportedInterfaces = NextInterface->Next; 234 235 /* Only interfaces added at runtime can be freed */ 236 237 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 238 { 239 ACPI_FREE (NextInterface->Name); 240 ACPI_FREE (NextInterface); 241 } 242 243 NextInterface = AcpiGbl_SupportedInterfaces; 244 } 245 246 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 247} 248 249 250/******************************************************************************* 251 * 252 * FUNCTION: AcpiUtInstallInterface 253 * 254 * PARAMETERS: InterfaceName - The interface to install 255 * 256 * RETURN: Status 257 * 258 * DESCRIPTION: Install the interface into the global interface list. 259 * Caller MUST hold AcpiGbl_OsiMutex 260 * 261 ******************************************************************************/ 262 263ACPI_STATUS 264AcpiUtInstallInterface ( 265 ACPI_STRING InterfaceName) 266{ 267 ACPI_INTERFACE_INFO *InterfaceInfo; 268 269 270 /* Allocate info block and space for the name string */ 271 272 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 273 if (!InterfaceInfo) 274 { 275 return (AE_NO_MEMORY); 276 } 277 278 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1); 279 if (!InterfaceInfo->Name) 280 { 281 ACPI_FREE (InterfaceInfo); 282 return (AE_NO_MEMORY); 283 } 284 285 /* Initialize new info and insert at the head of the global list */ 286 287 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName); 288 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 289 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 290 291 AcpiGbl_SupportedInterfaces = InterfaceInfo; 292 return (AE_OK); 293} 294 295 296/******************************************************************************* 297 * 298 * FUNCTION: AcpiUtRemoveInterface 299 * 300 * PARAMETERS: InterfaceName - The interface to remove 301 * 302 * RETURN: Status 303 * 304 * DESCRIPTION: Remove the interface from the global interface list. 305 * Caller MUST hold AcpiGbl_OsiMutex 306 * 307 ******************************************************************************/ 308 309ACPI_STATUS 310AcpiUtRemoveInterface ( 311 ACPI_STRING InterfaceName) 312{ 313 ACPI_INTERFACE_INFO *PreviousInterface; 314 ACPI_INTERFACE_INFO *NextInterface; 315 316 317 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 318 while (NextInterface) 319 { 320 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 321 { 322 /* Found: name is in either the static list or was added at runtime */ 323 324 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 325 { 326 /* Interface was added dynamically, remove and free it */ 327 328 if (PreviousInterface == NextInterface) 329 { 330 AcpiGbl_SupportedInterfaces = NextInterface->Next; 331 } 332 else 333 { 334 PreviousInterface->Next = NextInterface->Next; 335 } 336 337 ACPI_FREE (NextInterface->Name); 338 ACPI_FREE (NextInterface); 339 } 340 else 341 { 342 /* 343 * Interface is in static list. If marked invalid, then it 344 * does not actually exist. Else, mark it invalid. 345 */ 346 if (NextInterface->Flags & ACPI_OSI_INVALID) 347 { 348 return (AE_NOT_EXIST); 349 } 350 351 NextInterface->Flags |= ACPI_OSI_INVALID; 352 } 353 354 return (AE_OK); 355 } 356 357 PreviousInterface = NextInterface; 358 NextInterface = NextInterface->Next; 359 } 360 361 /* Interface was not found */ 362 363 return (AE_NOT_EXIST); 364} 365 366 367/******************************************************************************* 368 * 369 * FUNCTION: AcpiUtGetInterface 370 * 371 * PARAMETERS: InterfaceName - The interface to find 372 * 373 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 374 * 375 * DESCRIPTION: Search for the specified interface name in the global list. 376 * Caller MUST hold AcpiGbl_OsiMutex 377 * 378 ******************************************************************************/ 379 380ACPI_INTERFACE_INFO * 381AcpiUtGetInterface ( 382 ACPI_STRING InterfaceName) 383{ 384 ACPI_INTERFACE_INFO *NextInterface; 385 386 387 NextInterface = AcpiGbl_SupportedInterfaces; 388 while (NextInterface) 389 { 390 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 391 { 392 return (NextInterface); 393 } 394 395 NextInterface = NextInterface->Next; 396 } 397 398 return (NULL); 399} 400 401 402/******************************************************************************* 403 * 404 * FUNCTION: AcpiUtOsiImplementation 405 * 406 * PARAMETERS: WalkState - Current walk state 407 * 408 * RETURN: Status 409 * 410 * DESCRIPTION: Implementation of the _OSI predefined control method. When 411 * an invocation of _OSI is encountered in the system AML, 412 * control is transferred to this function. 413 * 414 ******************************************************************************/ 415 416ACPI_STATUS 417AcpiUtOsiImplementation ( 418 ACPI_WALK_STATE *WalkState) 419{ 420 ACPI_OPERAND_OBJECT *StringDesc; 421 ACPI_OPERAND_OBJECT *ReturnDesc; 422 ACPI_INTERFACE_INFO *InterfaceInfo; 423 ACPI_INTERFACE_HANDLER InterfaceHandler; 424 UINT32 ReturnValue; 425 426 427 ACPI_FUNCTION_TRACE (UtOsiImplementation); 428 429 430 /* Validate the string input argument (from the AML caller) */ 431 432 StringDesc = WalkState->Arguments[0].Object; 433 if (!StringDesc || 434 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 435 { 436 return_ACPI_STATUS (AE_TYPE); 437 } 438 439 /* Create a return object */ 440 441 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 442 if (!ReturnDesc) 443 { 444 return_ACPI_STATUS (AE_NO_MEMORY); 445 } 446 447 /* Default return value is 0, NOT SUPPORTED */ 448 449 ReturnValue = 0; 450 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 451 452 /* Lookup the interface in the global _OSI list */ 453 454 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 455 if (InterfaceInfo && 456 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 457 { 458 /* 459 * The interface is supported. 460 * Update the OsiData if necessary. We keep track of the latest 461 * version of Windows that has been requested by the BIOS. 462 */ 463 if (InterfaceInfo->Value > AcpiGbl_OsiData) 464 { 465 AcpiGbl_OsiData = InterfaceInfo->Value; 466 } 467 468 ReturnValue = ACPI_UINT32_MAX; 469 } 470 471 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 472 473 /* 474 * Invoke an optional _OSI interface handler. The host OS may wish 475 * to do some interface-specific handling. For example, warn about 476 * certain interfaces or override the true/false support value. 477 */ 478 InterfaceHandler = AcpiGbl_InterfaceHandler; 479 if (InterfaceHandler) 480 { 481 ReturnValue = InterfaceHandler ( 482 StringDesc->String.Pointer, ReturnValue); 483 } 484 485 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 486 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 487 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 488 489 /* Complete the return object */ 490 491 ReturnDesc->Integer.Value = ReturnValue; 492 WalkState->ReturnDesc = ReturnDesc; 493 return_ACPI_STATUS (AE_OK); 494} 495