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 - 2012, 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 "acpi.h" 119#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 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 153 154 /* Feature Group Strings */ 155 156 {"Extended Address Space Descriptor", NULL, 0, 0} 157 158 /* 159 * All "optional" feature group strings (features that are implemented 160 * by the host) should be dynamically added by the host via 161 * AcpiInstallInterface and should not be manually added here. 162 * 163 * Examples of optional feature group strings: 164 * 165 * "Module Device" 166 * "Processor Device" 167 * "3.0 Thermal Model" 168 * "3.0 _SCP Extensions" 169 * "Processor Aggregator Device" 170 */ 171}; 172 173 174/******************************************************************************* 175 * 176 * FUNCTION: AcpiUtInitializeInterfaces 177 * 178 * PARAMETERS: None 179 * 180 * RETURN: Status 181 * 182 * DESCRIPTION: Initialize the global _OSI supported interfaces list 183 * 184 ******************************************************************************/ 185 186ACPI_STATUS 187AcpiUtInitializeInterfaces ( 188 void) 189{ 190 UINT32 i; 191 192 193 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 194 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 195 196 /* Link the static list of supported interfaces */ 197 198 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 199 { 200 AcpiDefaultSupportedInterfaces[i].Next = 201 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 202 } 203 204 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 205 return (AE_OK); 206} 207 208 209/******************************************************************************* 210 * 211 * FUNCTION: AcpiUtInterfaceTerminate 212 * 213 * PARAMETERS: None 214 * 215 * RETURN: None 216 * 217 * DESCRIPTION: Delete all interfaces in the global list. Sets 218 * AcpiGbl_SupportedInterfaces to NULL. 219 * 220 ******************************************************************************/ 221 222void 223AcpiUtInterfaceTerminate ( 224 void) 225{ 226 ACPI_INTERFACE_INFO *NextInterface; 227 228 229 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 230 NextInterface = AcpiGbl_SupportedInterfaces; 231 232 while (NextInterface) 233 { 234 AcpiGbl_SupportedInterfaces = NextInterface->Next; 235 236 /* Only interfaces added at runtime can be freed */ 237 238 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 239 { 240 ACPI_FREE (NextInterface->Name); 241 ACPI_FREE (NextInterface); 242 } 243 244 NextInterface = AcpiGbl_SupportedInterfaces; 245 } 246 247 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 248} 249 250 251/******************************************************************************* 252 * 253 * FUNCTION: AcpiUtInstallInterface 254 * 255 * PARAMETERS: InterfaceName - The interface to install 256 * 257 * RETURN: Status 258 * 259 * DESCRIPTION: Install the interface into the global interface list. 260 * Caller MUST hold AcpiGbl_OsiMutex 261 * 262 ******************************************************************************/ 263 264ACPI_STATUS 265AcpiUtInstallInterface ( 266 ACPI_STRING InterfaceName) 267{ 268 ACPI_INTERFACE_INFO *InterfaceInfo; 269 270 271 /* Allocate info block and space for the name string */ 272 273 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 274 if (!InterfaceInfo) 275 { 276 return (AE_NO_MEMORY); 277 } 278 279 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1); 280 if (!InterfaceInfo->Name) 281 { 282 ACPI_FREE (InterfaceInfo); 283 return (AE_NO_MEMORY); 284 } 285 286 /* Initialize new info and insert at the head of the global list */ 287 288 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName); 289 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 290 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 291 292 AcpiGbl_SupportedInterfaces = InterfaceInfo; 293 return (AE_OK); 294} 295 296 297/******************************************************************************* 298 * 299 * FUNCTION: AcpiUtRemoveInterface 300 * 301 * PARAMETERS: InterfaceName - The interface to remove 302 * 303 * RETURN: Status 304 * 305 * DESCRIPTION: Remove the interface from the global interface list. 306 * Caller MUST hold AcpiGbl_OsiMutex 307 * 308 ******************************************************************************/ 309 310ACPI_STATUS 311AcpiUtRemoveInterface ( 312 ACPI_STRING InterfaceName) 313{ 314 ACPI_INTERFACE_INFO *PreviousInterface; 315 ACPI_INTERFACE_INFO *NextInterface; 316 317 318 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 319 while (NextInterface) 320 { 321 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 322 { 323 /* Found: name is in either the static list or was added at runtime */ 324 325 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 326 { 327 /* Interface was added dynamically, remove and free it */ 328 329 if (PreviousInterface == NextInterface) 330 { 331 AcpiGbl_SupportedInterfaces = NextInterface->Next; 332 } 333 else 334 { 335 PreviousInterface->Next = NextInterface->Next; 336 } 337 338 ACPI_FREE (NextInterface->Name); 339 ACPI_FREE (NextInterface); 340 } 341 else 342 { 343 /* 344 * Interface is in static list. If marked invalid, then it 345 * does not actually exist. Else, mark it invalid. 346 */ 347 if (NextInterface->Flags & ACPI_OSI_INVALID) 348 { 349 return (AE_NOT_EXIST); 350 } 351 352 NextInterface->Flags |= ACPI_OSI_INVALID; 353 } 354 355 return (AE_OK); 356 } 357 358 PreviousInterface = NextInterface; 359 NextInterface = NextInterface->Next; 360 } 361 362 /* Interface was not found */ 363 364 return (AE_NOT_EXIST); 365} 366 367 368/******************************************************************************* 369 * 370 * FUNCTION: AcpiUtGetInterface 371 * 372 * PARAMETERS: InterfaceName - The interface to find 373 * 374 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 375 * 376 * DESCRIPTION: Search for the specified interface name in the global list. 377 * Caller MUST hold AcpiGbl_OsiMutex 378 * 379 ******************************************************************************/ 380 381ACPI_INTERFACE_INFO * 382AcpiUtGetInterface ( 383 ACPI_STRING InterfaceName) 384{ 385 ACPI_INTERFACE_INFO *NextInterface; 386 387 388 NextInterface = AcpiGbl_SupportedInterfaces; 389 while (NextInterface) 390 { 391 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 392 { 393 return (NextInterface); 394 } 395 396 NextInterface = NextInterface->Next; 397 } 398 399 return (NULL); 400} 401 402 403/******************************************************************************* 404 * 405 * FUNCTION: AcpiUtOsiImplementation 406 * 407 * PARAMETERS: WalkState - Current walk state 408 * 409 * RETURN: Status 410 * 411 * DESCRIPTION: Implementation of the _OSI predefined control method. When 412 * an invocation of _OSI is encountered in the system AML, 413 * control is transferred to this function. 414 * 415 ******************************************************************************/ 416 417ACPI_STATUS 418AcpiUtOsiImplementation ( 419 ACPI_WALK_STATE *WalkState) 420{ 421 ACPI_OPERAND_OBJECT *StringDesc; 422 ACPI_OPERAND_OBJECT *ReturnDesc; 423 ACPI_INTERFACE_INFO *InterfaceInfo; 424 ACPI_INTERFACE_HANDLER InterfaceHandler; 425 UINT32 ReturnValue; 426 427 428 ACPI_FUNCTION_TRACE (UtOsiImplementation); 429 430 431 /* Validate the string input argument (from the AML caller) */ 432 433 StringDesc = WalkState->Arguments[0].Object; 434 if (!StringDesc || 435 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 436 { 437 return_ACPI_STATUS (AE_TYPE); 438 } 439 440 /* Create a return object */ 441 442 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 443 if (!ReturnDesc) 444 { 445 return_ACPI_STATUS (AE_NO_MEMORY); 446 } 447 448 /* Default return value is 0, NOT SUPPORTED */ 449 450 ReturnValue = 0; 451 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 452 453 /* Lookup the interface in the global _OSI list */ 454 455 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 456 if (InterfaceInfo && 457 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 458 { 459 /* 460 * The interface is supported. 461 * Update the OsiData if necessary. We keep track of the latest 462 * version of Windows that has been requested by the BIOS. 463 */ 464 if (InterfaceInfo->Value > AcpiGbl_OsiData) 465 { 466 AcpiGbl_OsiData = InterfaceInfo->Value; 467 } 468 469 ReturnValue = ACPI_UINT32_MAX; 470 } 471 472 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 473 474 /* 475 * Invoke an optional _OSI interface handler. The host OS may wish 476 * to do some interface-specific handling. For example, warn about 477 * certain interfaces or override the true/false support value. 478 */ 479 InterfaceHandler = AcpiGbl_InterfaceHandler; 480 if (InterfaceHandler) 481 { 482 ReturnValue = InterfaceHandler ( 483 StringDesc->String.Pointer, ReturnValue); 484 } 485 486 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 487 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 488 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 489 490 /* Complete the return object */ 491 492 ReturnDesc->Integer.Value = ReturnValue; 493 WalkState->ReturnDesc = ReturnDesc; 494 return_ACPI_STATUS (AE_OK); 495} 496