1 /******************************************************************************
3 * Module Name: utosi - Support for the _OSI predefined control method
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************/
119 #include "accommon.h"
122 #define _COMPONENT ACPI_UTILITIES
123 ACPI_MODULE_NAME ("utosi")
126 * Strings supported by the _OSI predefined control method (which is
127 * implemented internally within this module.)
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.
134 * The last element of each entry is used to track the newest version of
135 * Windows that the BIOS has requested.
137 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] =
139 /* Operating System Vendor Strings */
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 */
153 /* Feature Group Strings */
155 {"Extended Address Space Descriptor", NULL, 0, 0}
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.
162 * Examples of optional feature group strings:
166 * "3.0 Thermal Model"
167 * "3.0 _SCP Extensions"
168 * "Processor Aggregator Device"
173 /*******************************************************************************
175 * FUNCTION: AcpiUtInitializeInterfaces
181 * DESCRIPTION: Initialize the global _OSI supported interfaces list
183 ******************************************************************************/
186 AcpiUtInitializeInterfaces (
192 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
193 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces;
195 /* Link the static list of supported interfaces */
197 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++)
199 AcpiDefaultSupportedInterfaces[i].Next =
200 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1];
203 AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
208 /*******************************************************************************
210 * FUNCTION: AcpiUtInterfaceTerminate
216 * DESCRIPTION: Delete all interfaces in the global list. Sets
217 * AcpiGbl_SupportedInterfaces to NULL.
219 ******************************************************************************/
222 AcpiUtInterfaceTerminate (
225 ACPI_INTERFACE_INFO *NextInterface;
228 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
229 NextInterface = AcpiGbl_SupportedInterfaces;
231 while (NextInterface)
233 AcpiGbl_SupportedInterfaces = NextInterface->Next;
235 /* Only interfaces added at runtime can be freed */
237 if (NextInterface->Flags & ACPI_OSI_DYNAMIC)
239 ACPI_FREE (NextInterface->Name);
240 ACPI_FREE (NextInterface);
243 NextInterface = AcpiGbl_SupportedInterfaces;
246 AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
250 /*******************************************************************************
252 * FUNCTION: AcpiUtInstallInterface
254 * PARAMETERS: InterfaceName - The interface to install
258 * DESCRIPTION: Install the interface into the global interface list.
259 * Caller MUST hold AcpiGbl_OsiMutex
261 ******************************************************************************/
264 AcpiUtInstallInterface (
265 ACPI_STRING InterfaceName)
267 ACPI_INTERFACE_INFO *InterfaceInfo;
270 /* Allocate info block and space for the name string */
272 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO));
275 return (AE_NO_MEMORY);
278 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1);
279 if (!InterfaceInfo->Name)
281 ACPI_FREE (InterfaceInfo);
282 return (AE_NO_MEMORY);
285 /* Initialize new info and insert at the head of the global list */
287 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName);
288 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC;
289 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces;
291 AcpiGbl_SupportedInterfaces = InterfaceInfo;
296 /*******************************************************************************
298 * FUNCTION: AcpiUtRemoveInterface
300 * PARAMETERS: InterfaceName - The interface to remove
304 * DESCRIPTION: Remove the interface from the global interface list.
305 * Caller MUST hold AcpiGbl_OsiMutex
307 ******************************************************************************/
310 AcpiUtRemoveInterface (
311 ACPI_STRING InterfaceName)
313 ACPI_INTERFACE_INFO *PreviousInterface;
314 ACPI_INTERFACE_INFO *NextInterface;
317 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces;
318 while (NextInterface)
320 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name))
322 /* Found: name is in either the static list or was added at runtime */
324 if (NextInterface->Flags & ACPI_OSI_DYNAMIC)
326 /* Interface was added dynamically, remove and free it */
328 if (PreviousInterface == NextInterface)
330 AcpiGbl_SupportedInterfaces = NextInterface->Next;
334 PreviousInterface->Next = NextInterface->Next;
337 ACPI_FREE (NextInterface->Name);
338 ACPI_FREE (NextInterface);
343 * Interface is in static list. If marked invalid, then it
344 * does not actually exist. Else, mark it invalid.
346 if (NextInterface->Flags & ACPI_OSI_INVALID)
348 return (AE_NOT_EXIST);
351 NextInterface->Flags |= ACPI_OSI_INVALID;
357 PreviousInterface = NextInterface;
358 NextInterface = NextInterface->Next;
361 /* Interface was not found */
363 return (AE_NOT_EXIST);
367 /*******************************************************************************
369 * FUNCTION: AcpiUtGetInterface
371 * PARAMETERS: InterfaceName - The interface to find
373 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found.
375 * DESCRIPTION: Search for the specified interface name in the global list.
376 * Caller MUST hold AcpiGbl_OsiMutex
378 ******************************************************************************/
380 ACPI_INTERFACE_INFO *
382 ACPI_STRING InterfaceName)
384 ACPI_INTERFACE_INFO *NextInterface;
387 NextInterface = AcpiGbl_SupportedInterfaces;
388 while (NextInterface)
390 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name))
392 return (NextInterface);
395 NextInterface = NextInterface->Next;
402 /*******************************************************************************
404 * FUNCTION: AcpiUtOsiImplementation
406 * PARAMETERS: WalkState - Current walk state
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.
414 ******************************************************************************/
417 AcpiUtOsiImplementation (
418 ACPI_WALK_STATE *WalkState)
420 ACPI_OPERAND_OBJECT *StringDesc;
421 ACPI_OPERAND_OBJECT *ReturnDesc;
422 ACPI_INTERFACE_INFO *InterfaceInfo;
423 ACPI_INTERFACE_HANDLER InterfaceHandler;
427 ACPI_FUNCTION_TRACE (UtOsiImplementation);
430 /* Validate the string input argument (from the AML caller) */
432 StringDesc = WalkState->Arguments[0].Object;
434 (StringDesc->Common.Type != ACPI_TYPE_STRING))
436 return_ACPI_STATUS (AE_TYPE);
439 /* Create a return object */
441 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
444 return_ACPI_STATUS (AE_NO_MEMORY);
447 /* Default return value is 0, NOT SUPPORTED */
450 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
452 /* Lookup the interface in the global _OSI list */
454 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer);
456 !(InterfaceInfo->Flags & ACPI_OSI_INVALID))
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.
463 if (InterfaceInfo->Value > AcpiGbl_OsiData)
465 AcpiGbl_OsiData = InterfaceInfo->Value;
468 ReturnValue = ACPI_UINT32_MAX;
471 AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
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.
478 InterfaceHandler = AcpiGbl_InterfaceHandler;
479 if (InterfaceHandler)
481 ReturnValue = InterfaceHandler (
482 StringDesc->String.Pointer, ReturnValue);
485 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO,
486 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n",
487 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : ""));
489 /* Complete the return object */
491 ReturnDesc->Integer.Value = ReturnValue;
492 WalkState->ReturnDesc = ReturnDesc;
493 return_ACPI_STATUS (AE_OK);