26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Module Name: utosi - Support for the _OSI predefined control method
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross *****************************************************************************/
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Copyright (C) 2000 - 2016, Intel Corp.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * All rights reserved.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Redistribution and use in source and binary forms, with or without
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * modification, are permitted provided that the following conditions
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * 1. Redistributions of source code must retain the above copyright
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * notice, this list of conditions, and the following disclaimer,
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * without modification.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * 2. Redistributions in binary form must reproduce at minimum a disclaimer
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * substantially similar to the "NO WARRANTY" disclaimer below
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * ("Disclaimer") and any redistribution must be conditioned upon
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * including a substantially similar Disclaimer requirement for further
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * binary redistribution.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * 3. Neither the names of the above-listed copyright holders nor the names
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * of any contributors may be used to endorse or promote products derived
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * from this software without specific prior written permission.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Alternatively, this software may be distributed under the terms of the
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * GNU General Public License ("GPL") version 2 as published by the Free
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Software Foundation.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * NO WARRANTY
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * POSSIBILITY OF SUCH DAMAGES.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/******************************************************************************
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * ACPICA policy for new _OSI strings:
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * It is the stated policy of ACPICA that new _OSI strings will be integrated
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * into this module as soon as possible after they are defined. It is strongly
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * recommended that all ACPICA hosts mirror this policy and integrate any
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * changes to this module as soon as possible. There are several historical
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * reasons behind this policy:
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * 1) New BIOSs tend to test only the case where the host responds TRUE to
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * the latest version of Windows, which would respond to the latest/newest
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * _OSI string. Not responding TRUE to the latest version of Windows will
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * risk executing untested code paths throughout the DSDT and SSDTs.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * 2) If a new _OSI string is recognized only after a significant delay, this
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * has the potential to cause problems on existing working machines because
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * of the possibility that a new and different path through the ASL code
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * will be executed.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * 3) New _OSI strings are tending to come out about once per year. A delay
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * in recognizing a new string for a significant amount of time risks the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * release of another string which only compounds the initial problem.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *****************************************************************************/
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Strings supported by the _OSI predefined control method (which is
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * implemented internally within this module.)
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * March 2009: Removed "Linux" as this host no longer wants to respond true
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * for this string. Basically, the only safe OS strings are windows-related
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * and in many or most cases represent the only test path within the
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * BIOS-provided ASL code.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * The last element of each entry is used to track the newest version of
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Windows that the BIOS has requested.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Rossstatic ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] =
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Operating System Vendor Strings */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * The following OSes are temporarily disabled. Windows introduced
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * support for xhci (USB 3.0) in Windows 8. When we advertise Windows 8
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * and newer support, some vendors use that as a key to automatically
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * transition all USB ports to the xhci controller. Until we have
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * support for the xhci controller, we should not advertise these
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * operating systems. From a brief survey, there isn't too much other
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * AML that this impacts at this time.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/* {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8},*/ /* Windows 8 and Server 2012 - Added 08/2012 */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/* {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8},*/ /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/* {"Windows 2015", NULL, 0, ACPI_OSI_WIN_10},*/ /* Windows 10 - Added 03/2015 */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Feature Group Strings */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0},
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * All "optional" feature group strings (features that are implemented
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * by the host) should be dynamically modified to VALID by the host via
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * group strings are set as INVALID by default here.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/*******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * FUNCTION: AcpiUtInitializeInterfaces
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * PARAMETERS: None
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * RETURN: Status
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DESCRIPTION: Initialize the global _OSI supported interfaces list
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ******************************************************************************/
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces;
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Link the static list of supported interfaces */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1];
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/*******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * FUNCTION: AcpiUtInterfaceTerminate
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * PARAMETERS: None
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * RETURN: Status
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DESCRIPTION: Delete all interfaces in the global list. Sets
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * AcpiGbl_SupportedInterfaces to NULL.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ******************************************************************************/
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross AcpiGbl_SupportedInterfaces = NextInterface->Next;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Only interfaces added at runtime can be freed */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Interface is in static list. Reset it to invalid or valid. */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID)
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/*******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * FUNCTION: AcpiUtInstallInterface
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * PARAMETERS: InterfaceName - The interface to install
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * RETURN: Status
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DESCRIPTION: Install the interface into the global interface list.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Caller MUST hold AcpiGbl_OsiMutex
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ******************************************************************************/
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Allocate info block and space for the name string */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO));
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (strlen (InterfaceName) + 1);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Initialize new info and insert at the head of the global list */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross InterfaceInfo->Next = AcpiGbl_SupportedInterfaces;
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/*******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * FUNCTION: AcpiUtRemoveInterface
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * PARAMETERS: InterfaceName - The interface to remove
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * RETURN: Status
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DESCRIPTION: Remove the interface from the global interface list.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Caller MUST hold AcpiGbl_OsiMutex
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ******************************************************************************/
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (!strcmp (InterfaceName, NextInterface->Name))
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Found: name is in either the static list
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * or was added at runtime
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Interface was added dynamically, remove and free it */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross AcpiGbl_SupportedInterfaces = NextInterface->Next;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Interface is in static list. If marked invalid, then
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * it does not actually exist. Else, mark it invalid.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Interface was not found */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*******************************************************************************
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * FUNCTION: AcpiUtUpdateInterfaces
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * PARAMETERS: Action - Actions to be performed during the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * RETURN: Status
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * strings or/and feature group strings.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Caller MUST hold AcpiGbl_OsiMutex
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek ******************************************************************************/
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (((NextInterface->Flags & ACPI_OSI_FEATURE) &&
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek (!(NextInterface->Flags & ACPI_OSI_FEATURE) &&
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Mark the interfaces as invalid */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Mark the interfaces as valid */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/*******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * FUNCTION: AcpiUtGetInterface
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * PARAMETERS: InterfaceName - The interface to find
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DESCRIPTION: Search for the specified interface name in the global list.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Caller MUST hold AcpiGbl_OsiMutex
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ******************************************************************************/
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (!strcmp (InterfaceName, NextInterface->Name))
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross/*******************************************************************************
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * FUNCTION: AcpiUtOsiImplementation
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * PARAMETERS: WalkState - Current walk state
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * RETURN: Status
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * DESCRIPTION: Implementation of the _OSI predefined control method. When
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * an invocation of _OSI is encountered in the system AML,
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * control is transferred to this function.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ******************************************************************************/
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Validate the string input argument (from the AML caller) */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Create a return object */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Default return value is 0, NOT SUPPORTED */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Lookup the interface in the global _OSI list */
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer);
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * The interface is supported.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Update the OsiData if necessary. We keep track of the latest
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * version of Windows that has been requested by the BIOS.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * Invoke an optional _OSI interface handler. The host OS may wish
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * to do some interface-specific handling. For example, warn about
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross * certain interfaces or override the true/false support value.
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross "ACPI: BIOS _OSI(\"%s\") is %ssupported\n",
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross StringDesc->String.Pointer, ReturnValue == 0 ? "not " : ""));
26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0Gordon Ross /* Complete the return object */