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diff --git a/source/components/executer/exmutex.c b/source/components/executer/exmutex.c
index c2fe60984..962b9c1cf 100644
--- a/source/components/executer/exmutex.c
+++ b/source/components/executer/exmutex.c
@@ -1,626 +1,626 @@
-/******************************************************************************
- *
- * Module Name: exmutex - ASL Mutex Acquire/Release functions
- *
- *****************************************************************************/
-
-/******************************************************************************
- *
- * 1. Copyright Notice
- *
- * Some or all of this work - Copyright (c) 1999 - 2015, Intel Corp.
- * All rights reserved.
- *
- * 2. License
- *
- * 2.1. This is your license from Intel Corp. under its intellectual property
- * rights. You may have additional license terms from the party that provided
- * you this software, covering your right to use that party's intellectual
- * property rights.
- *
- * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
- * copy of the source code appearing in this file ("Covered Code") an
- * irrevocable, perpetual, worldwide license under Intel's copyrights in the
- * base code distributed originally by Intel ("Original Intel Code") to copy,
- * make derivatives, distribute, use and display any portion of the Covered
- * Code in any form, with the right to sublicense such rights; and
- *
- * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
- * license (with the right to sublicense), under only those claims of Intel
- * patents that are infringed by the Original Intel Code, to make, use, sell,
- * offer to sell, and import the Covered Code and derivative works thereof
- * solely to the minimum extent necessary to exercise the above copyright
- * license, and in no event shall the patent license extend to any additions
- * to or modifications of the Original Intel Code. No other license or right
- * is granted directly or by implication, estoppel or otherwise;
- *
- * The above copyright and patent license is granted only if the following
- * conditions are met:
- *
- * 3. Conditions
- *
- * 3.1. Redistribution of Source with Rights to Further Distribute Source.
- * Redistribution of source code of any substantial portion of the Covered
- * Code or modification with rights to further distribute source must include
- * the above Copyright Notice, the above License, this list of Conditions,
- * and the following Disclaimer and Export Compliance provision. In addition,
- * Licensee must cause all Covered Code to which Licensee contributes to
- * contain a file documenting the changes Licensee made to create that Covered
- * Code and the date of any change. Licensee must include in that file the
- * documentation of any changes made by any predecessor Licensee. Licensee
- * must include a prominent statement that the modification is derived,
- * directly or indirectly, from Original Intel Code.
- *
- * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
- * Redistribution of source code of any substantial portion of the Covered
- * Code or modification without rights to further distribute source must
- * include the following Disclaimer and Export Compliance provision in the
- * documentation and/or other materials provided with distribution. In
- * addition, Licensee may not authorize further sublicense of source of any
- * portion of the Covered Code, and must include terms to the effect that the
- * license from Licensee to its licensee is limited to the intellectual
- * property embodied in the software Licensee provides to its licensee, and
- * not to intellectual property embodied in modifications its licensee may
- * make.
- *
- * 3.3. Redistribution of Executable. Redistribution in executable form of any
- * substantial portion of the Covered Code or modification must reproduce the
- * above Copyright Notice, and the following Disclaimer and Export Compliance
- * provision in the documentation and/or other materials provided with the
- * distribution.
- *
- * 3.4. Intel retains all right, title, and interest in and to the Original
- * Intel Code.
- *
- * 3.5. Neither the name Intel nor any other trademark owned or controlled by
- * Intel shall be used in advertising or otherwise to promote the sale, use or
- * other dealings in products derived from or relating to the Covered Code
- * without prior written authorization from Intel.
- *
- * 4. Disclaimer and Export Compliance
- *
- * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
- * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
- * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
- * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
- * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
- * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
- * PARTICULAR PURPOSE.
- *
- * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
- * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
- * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
- * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
- * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
- * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
- * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
- * LIMITED REMEDY.
- *
- * 4.3. Licensee shall not export, either directly or indirectly, any of this
- * software or system incorporating such software without first obtaining any
- * required license or other approval from the U. S. Department of Commerce or
- * any other agency or department of the United States Government. In the
- * event Licensee exports any such software from the United States or
- * re-exports any such software from a foreign destination, Licensee shall
- * ensure that the distribution and export/re-export of the software is in
- * compliance with all laws, regulations, orders, or other restrictions of the
- * U.S. Export Administration Regulations. Licensee agrees that neither it nor
- * any of its subsidiaries will export/re-export any technical data, process,
- * software, or service, directly or indirectly, to any country for which the
- * United States government or any agency thereof requires an export license,
- * other governmental approval, or letter of assurance, without first obtaining
- * such license, approval or letter.
- *
- *****************************************************************************/
-
-#include "acpi.h"
-#include "accommon.h"
-#include "acinterp.h"
-#include "acevents.h"
-
-#define _COMPONENT ACPI_EXECUTER
- ACPI_MODULE_NAME ("exmutex")
-
-/* Local prototypes */
-
-static void
-AcpiExLinkMutex (
- ACPI_OPERAND_OBJECT *ObjDesc,
- ACPI_THREAD_STATE *Thread);
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExUnlinkMutex
- *
- * PARAMETERS: ObjDesc - The mutex to be unlinked
- *
- * RETURN: None
- *
- * DESCRIPTION: Remove a mutex from the "AcquiredMutex" list
- *
- ******************************************************************************/
-
-void
-AcpiExUnlinkMutex (
- ACPI_OPERAND_OBJECT *ObjDesc)
-{
- ACPI_THREAD_STATE *Thread = ObjDesc->Mutex.OwnerThread;
-
-
- if (!Thread)
- {
- return;
- }
-
- /* Doubly linked list */
-
- if (ObjDesc->Mutex.Next)
- {
- (ObjDesc->Mutex.Next)->Mutex.Prev = ObjDesc->Mutex.Prev;
- }
-
- if (ObjDesc->Mutex.Prev)
- {
- (ObjDesc->Mutex.Prev)->Mutex.Next = ObjDesc->Mutex.Next;
-
- /*
- * Migrate the previous sync level associated with this mutex to
- * the previous mutex on the list so that it may be preserved.
- * This handles the case where several mutexes have been acquired
- * at the same level, but are not released in opposite order.
- */
- (ObjDesc->Mutex.Prev)->Mutex.OriginalSyncLevel =
- ObjDesc->Mutex.OriginalSyncLevel;
- }
- else
- {
- Thread->AcquiredMutexList = ObjDesc->Mutex.Next;
- }
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExLinkMutex
- *
- * PARAMETERS: ObjDesc - The mutex to be linked
- * Thread - Current executing thread object
- *
- * RETURN: None
- *
- * DESCRIPTION: Add a mutex to the "AcquiredMutex" list for this walk
- *
- ******************************************************************************/
-
-static void
-AcpiExLinkMutex (
- ACPI_OPERAND_OBJECT *ObjDesc,
- ACPI_THREAD_STATE *Thread)
-{
- ACPI_OPERAND_OBJECT *ListHead;
-
-
- ListHead = Thread->AcquiredMutexList;
-
- /* This object will be the first object in the list */
-
- ObjDesc->Mutex.Prev = NULL;
- ObjDesc->Mutex.Next = ListHead;
-
- /* Update old first object to point back to this object */
-
- if (ListHead)
- {
- ListHead->Mutex.Prev = ObjDesc;
- }
-
- /* Update list head */
-
- Thread->AcquiredMutexList = ObjDesc;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExAcquireMutexObject
- *
- * PARAMETERS: Timeout - Timeout in milliseconds
- * ObjDesc - Mutex object
- * ThreadId - Current thread state
- *
- * RETURN: Status
- *
- * DESCRIPTION: Acquire an AML mutex, low-level interface. Provides a common
- * path that supports multiple acquires by the same thread.
- *
- * MUTEX: Interpreter must be locked
- *
- * NOTE: This interface is called from three places:
- * 1) From AcpiExAcquireMutex, via an AML Acquire() operator
- * 2) From AcpiExAcquireGlobalLock when an AML Field access requires the
- * global lock
- * 3) From the external interface, AcpiAcquireGlobalLock
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiExAcquireMutexObject (
- UINT16 Timeout,
- ACPI_OPERAND_OBJECT *ObjDesc,
- ACPI_THREAD_ID ThreadId)
-{
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE_PTR (ExAcquireMutexObject, ObjDesc);
-
-
- if (!ObjDesc)
- {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- /* Support for multiple acquires by the owning thread */
-
- if (ObjDesc->Mutex.ThreadId == ThreadId)
- {
- /*
- * The mutex is already owned by this thread, just increment the
- * acquisition depth
- */
- ObjDesc->Mutex.AcquisitionDepth++;
- return_ACPI_STATUS (AE_OK);
- }
-
- /* Acquire the mutex, wait if necessary. Special case for Global Lock */
-
- if (ObjDesc == AcpiGbl_GlobalLockMutex)
- {
- Status = AcpiEvAcquireGlobalLock (Timeout);
- }
- else
- {
- Status = AcpiExSystemWaitMutex (ObjDesc->Mutex.OsMutex,
- Timeout);
- }
-
- if (ACPI_FAILURE (Status))
- {
- /* Includes failure from a timeout on TimeDesc */
-
- return_ACPI_STATUS (Status);
- }
-
- /* Acquired the mutex: update mutex object */
-
- ObjDesc->Mutex.ThreadId = ThreadId;
- ObjDesc->Mutex.AcquisitionDepth = 1;
- ObjDesc->Mutex.OriginalSyncLevel = 0;
- ObjDesc->Mutex.OwnerThread = NULL; /* Used only for AML Acquire() */
-
- return_ACPI_STATUS (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExAcquireMutex
- *
- * PARAMETERS: TimeDesc - Timeout integer
- * ObjDesc - Mutex object
- * WalkState - Current method execution state
- *
- * RETURN: Status
- *
- * DESCRIPTION: Acquire an AML mutex
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiExAcquireMutex (
- ACPI_OPERAND_OBJECT *TimeDesc,
- ACPI_OPERAND_OBJECT *ObjDesc,
- ACPI_WALK_STATE *WalkState)
-{
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE_PTR (ExAcquireMutex, ObjDesc);
-
-
- if (!ObjDesc)
- {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- /* Must have a valid thread state struct */
-
- if (!WalkState->Thread)
- {
- ACPI_ERROR ((AE_INFO,
- "Cannot acquire Mutex [%4.4s], null thread info",
- AcpiUtGetNodeName (ObjDesc->Mutex.Node)));
- return_ACPI_STATUS (AE_AML_INTERNAL);
- }
-
- /*
- * Current sync level must be less than or equal to the sync level of the
- * mutex. This mechanism provides some deadlock prevention
- */
- if (WalkState->Thread->CurrentSyncLevel > ObjDesc->Mutex.SyncLevel)
- {
- ACPI_ERROR ((AE_INFO,
- "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%u)",
- AcpiUtGetNodeName (ObjDesc->Mutex.Node),
- WalkState->Thread->CurrentSyncLevel));
- return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
- }
-
- Status = AcpiExAcquireMutexObject ((UINT16) TimeDesc->Integer.Value,
- ObjDesc, WalkState->Thread->ThreadId);
- if (ACPI_SUCCESS (Status) && ObjDesc->Mutex.AcquisitionDepth == 1)
- {
- /* Save Thread object, original/current sync levels */
-
- ObjDesc->Mutex.OwnerThread = WalkState->Thread;
- ObjDesc->Mutex.OriginalSyncLevel = WalkState->Thread->CurrentSyncLevel;
- WalkState->Thread->CurrentSyncLevel = ObjDesc->Mutex.SyncLevel;
-
- /* Link the mutex to the current thread for force-unlock at method exit */
-
- AcpiExLinkMutex (ObjDesc, WalkState->Thread);
- }
-
- return_ACPI_STATUS (Status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExReleaseMutexObject
- *
- * PARAMETERS: ObjDesc - The object descriptor for this op
- *
- * RETURN: Status
- *
- * DESCRIPTION: Release a previously acquired Mutex, low level interface.
- * Provides a common path that supports multiple releases (after
- * previous multiple acquires) by the same thread.
- *
- * MUTEX: Interpreter must be locked
- *
- * NOTE: This interface is called from three places:
- * 1) From AcpiExReleaseMutex, via an AML Acquire() operator
- * 2) From AcpiExReleaseGlobalLock when an AML Field access requires the
- * global lock
- * 3) From the external interface, AcpiReleaseGlobalLock
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiExReleaseMutexObject (
- ACPI_OPERAND_OBJECT *ObjDesc)
-{
- ACPI_STATUS Status = AE_OK;
-
-
- ACPI_FUNCTION_TRACE (ExReleaseMutexObject);
-
-
- if (ObjDesc->Mutex.AcquisitionDepth == 0)
- {
- return_ACPI_STATUS (AE_NOT_ACQUIRED);
- }
-
- /* Match multiple Acquires with multiple Releases */
-
- ObjDesc->Mutex.AcquisitionDepth--;
- if (ObjDesc->Mutex.AcquisitionDepth != 0)
- {
- /* Just decrement the depth and return */
-
- return_ACPI_STATUS (AE_OK);
- }
-
- if (ObjDesc->Mutex.OwnerThread)
- {
- /* Unlink the mutex from the owner's list */
-
- AcpiExUnlinkMutex (ObjDesc);
- ObjDesc->Mutex.OwnerThread = NULL;
- }
-
- /* Release the mutex, special case for Global Lock */
-
- if (ObjDesc == AcpiGbl_GlobalLockMutex)
- {
- Status = AcpiEvReleaseGlobalLock ();
- }
- else
- {
- AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex);
- }
-
- /* Clear mutex info */
-
- ObjDesc->Mutex.ThreadId = 0;
- return_ACPI_STATUS (Status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExReleaseMutex
- *
- * PARAMETERS: ObjDesc - The object descriptor for this op
- * WalkState - Current method execution state
- *
- * RETURN: Status
- *
- * DESCRIPTION: Release a previously acquired Mutex.
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiExReleaseMutex (
- ACPI_OPERAND_OBJECT *ObjDesc,
- ACPI_WALK_STATE *WalkState)
-{
- ACPI_STATUS Status = AE_OK;
- UINT8 PreviousSyncLevel;
- ACPI_THREAD_STATE *OwnerThread;
-
-
- ACPI_FUNCTION_TRACE (ExReleaseMutex);
-
-
- if (!ObjDesc)
- {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- OwnerThread = ObjDesc->Mutex.OwnerThread;
-
- /* The mutex must have been previously acquired in order to release it */
-
- if (!OwnerThread)
- {
- ACPI_ERROR ((AE_INFO,
- "Cannot release Mutex [%4.4s], not acquired",
- AcpiUtGetNodeName (ObjDesc->Mutex.Node)));
- return_ACPI_STATUS (AE_AML_MUTEX_NOT_ACQUIRED);
- }
-
- /* Must have a valid thread ID */
-
- if (!WalkState->Thread)
- {
- ACPI_ERROR ((AE_INFO,
- "Cannot release Mutex [%4.4s], null thread info",
- AcpiUtGetNodeName (ObjDesc->Mutex.Node)));
- return_ACPI_STATUS (AE_AML_INTERNAL);
- }
-
- /*
- * The Mutex is owned, but this thread must be the owner.
- * Special case for Global Lock, any thread can release
- */
- if ((OwnerThread->ThreadId != WalkState->Thread->ThreadId) &&
- (ObjDesc != AcpiGbl_GlobalLockMutex))
- {
- ACPI_ERROR ((AE_INFO,
- "Thread %u cannot release Mutex [%4.4s] acquired by thread %u",
- (UINT32) WalkState->Thread->ThreadId,
- AcpiUtGetNodeName (ObjDesc->Mutex.Node),
- (UINT32) OwnerThread->ThreadId));
- return_ACPI_STATUS (AE_AML_NOT_OWNER);
- }
-
- /*
- * The sync level of the mutex must be equal to the current sync level. In
- * other words, the current level means that at least one mutex at that
- * level is currently being held. Attempting to release a mutex of a
- * different level can only mean that the mutex ordering rule is being
- * violated. This behavior is clarified in ACPI 4.0 specification.
- */
- if (ObjDesc->Mutex.SyncLevel != OwnerThread->CurrentSyncLevel)
- {
- ACPI_ERROR ((AE_INFO,
- "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u",
- AcpiUtGetNodeName (ObjDesc->Mutex.Node),
- ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel));
- return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
- }
-
- /*
- * Get the previous SyncLevel from the head of the acquired mutex list.
- * This handles the case where several mutexes at the same level have been
- * acquired, but are not released in reverse order.
- */
- PreviousSyncLevel =
- OwnerThread->AcquiredMutexList->Mutex.OriginalSyncLevel;
-
- Status = AcpiExReleaseMutexObject (ObjDesc);
- if (ACPI_FAILURE (Status))
- {
- return_ACPI_STATUS (Status);
- }
-
- if (ObjDesc->Mutex.AcquisitionDepth == 0)
- {
- /* Restore the previous SyncLevel */
-
- OwnerThread->CurrentSyncLevel = PreviousSyncLevel;
- }
-
- return_ACPI_STATUS (Status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiExReleaseAllMutexes
- *
- * PARAMETERS: Thread - Current executing thread object
- *
- * RETURN: Status
- *
- * DESCRIPTION: Release all mutexes held by this thread
- *
- * NOTE: This function is called as the thread is exiting the interpreter.
- * Mutexes are not released when an individual control method is exited, but
- * only when the parent thread actually exits the interpreter. This allows one
- * method to acquire a mutex, and a different method to release it, as long as
- * this is performed underneath a single parent control method.
- *
- ******************************************************************************/
-
-void
-AcpiExReleaseAllMutexes (
- ACPI_THREAD_STATE *Thread)
-{
- ACPI_OPERAND_OBJECT *Next = Thread->AcquiredMutexList;
- ACPI_OPERAND_OBJECT *ObjDesc;
-
-
- ACPI_FUNCTION_NAME (ExReleaseAllMutexes);
-
-
- /* Traverse the list of owned mutexes, releasing each one */
-
- while (Next)
- {
- ObjDesc = Next;
- Next = ObjDesc->Mutex.Next;
-
- ObjDesc->Mutex.Prev = NULL;
- ObjDesc->Mutex.Next = NULL;
- ObjDesc->Mutex.AcquisitionDepth = 0;
-
- ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
- "Force-releasing held mutex: %p\n", ObjDesc));
-
- /* Release the mutex, special case for Global Lock */
-
- if (ObjDesc == AcpiGbl_GlobalLockMutex)
- {
- /* Ignore errors */
-
- (void) AcpiEvReleaseGlobalLock ();
- }
- else
- {
- AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex);
- }
-
- /* Mark mutex unowned */
-
- ObjDesc->Mutex.OwnerThread = NULL;
- ObjDesc->Mutex.ThreadId = 0;
-
- /* Update Thread SyncLevel (Last mutex is the important one) */
-
- Thread->CurrentSyncLevel = ObjDesc->Mutex.OriginalSyncLevel;
- }
-}
+/******************************************************************************
+ *
+ * Module Name: exmutex - ASL Mutex Acquire/Release functions
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999 - 2014, Intel Corp.
+ * All rights reserved.
+ *
+ * 2. License
+ *
+ * 2.1. This is your license from Intel Corp. under its intellectual property
+ * rights. You may have additional license terms from the party that provided
+ * you this software, covering your right to use that party's intellectual
+ * property rights.
+ *
+ * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
+ * copy of the source code appearing in this file ("Covered Code") an
+ * irrevocable, perpetual, worldwide license under Intel's copyrights in the
+ * base code distributed originally by Intel ("Original Intel Code") to copy,
+ * make derivatives, distribute, use and display any portion of the Covered
+ * Code in any form, with the right to sublicense such rights; and
+ *
+ * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
+ * license (with the right to sublicense), under only those claims of Intel
+ * patents that are infringed by the Original Intel Code, to make, use, sell,
+ * offer to sell, and import the Covered Code and derivative works thereof
+ * solely to the minimum extent necessary to exercise the above copyright
+ * license, and in no event shall the patent license extend to any additions
+ * to or modifications of the Original Intel Code. No other license or right
+ * is granted directly or by implication, estoppel or otherwise;
+ *
+ * The above copyright and patent license is granted only if the following
+ * conditions are met:
+ *
+ * 3. Conditions
+ *
+ * 3.1. Redistribution of Source with Rights to Further Distribute Source.
+ * Redistribution of source code of any substantial portion of the Covered
+ * Code or modification with rights to further distribute source must include
+ * the above Copyright Notice, the above License, this list of Conditions,
+ * and the following Disclaimer and Export Compliance provision. In addition,
+ * Licensee must cause all Covered Code to which Licensee contributes to
+ * contain a file documenting the changes Licensee made to create that Covered
+ * Code and the date of any change. Licensee must include in that file the
+ * documentation of any changes made by any predecessor Licensee. Licensee
+ * must include a prominent statement that the modification is derived,
+ * directly or indirectly, from Original Intel Code.
+ *
+ * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
+ * Redistribution of source code of any substantial portion of the Covered
+ * Code or modification without rights to further distribute source must
+ * include the following Disclaimer and Export Compliance provision in the
+ * documentation and/or other materials provided with distribution. In
+ * addition, Licensee may not authorize further sublicense of source of any
+ * portion of the Covered Code, and must include terms to the effect that the
+ * license from Licensee to its licensee is limited to the intellectual
+ * property embodied in the software Licensee provides to its licensee, and
+ * not to intellectual property embodied in modifications its licensee may
+ * make.
+ *
+ * 3.3. Redistribution of Executable. Redistribution in executable form of any
+ * substantial portion of the Covered Code or modification must reproduce the
+ * above Copyright Notice, and the following Disclaimer and Export Compliance
+ * provision in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3.4. Intel retains all right, title, and interest in and to the Original
+ * Intel Code.
+ *
+ * 3.5. Neither the name Intel nor any other trademark owned or controlled by
+ * Intel shall be used in advertising or otherwise to promote the sale, use or
+ * other dealings in products derived from or relating to the Covered Code
+ * without prior written authorization from Intel.
+ *
+ * 4. Disclaimer and Export Compliance
+ *
+ * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
+ * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
+ * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
+ * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
+ * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
+ * PARTICULAR PURPOSE.
+ *
+ * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
+ * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
+ * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
+ * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
+ * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
+ * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
+ * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
+ * LIMITED REMEDY.
+ *
+ * 4.3. Licensee shall not export, either directly or indirectly, any of this
+ * software or system incorporating such software without first obtaining any
+ * required license or other approval from the U. S. Department of Commerce or
+ * any other agency or department of the United States Government. In the
+ * event Licensee exports any such software from the United States or
+ * re-exports any such software from a foreign destination, Licensee shall
+ * ensure that the distribution and export/re-export of the software is in
+ * compliance with all laws, regulations, orders, or other restrictions of the
+ * U.S. Export Administration Regulations. Licensee agrees that neither it nor
+ * any of its subsidiaries will export/re-export any technical data, process,
+ * software, or service, directly or indirectly, to any country for which the
+ * United States government or any agency thereof requires an export license,
+ * other governmental approval, or letter of assurance, without first obtaining
+ * such license, approval or letter.
+ *
+ *****************************************************************************/
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acinterp.h"
+#include "acevents.h"
+
+#define _COMPONENT ACPI_EXECUTER
+ ACPI_MODULE_NAME ("exmutex")
+
+/* Local prototypes */
+
+static void
+AcpiExLinkMutex (
+ ACPI_OPERAND_OBJECT *ObjDesc,
+ ACPI_THREAD_STATE *Thread);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExUnlinkMutex
+ *
+ * PARAMETERS: ObjDesc - The mutex to be unlinked
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Remove a mutex from the "AcquiredMutex" list
+ *
+ ******************************************************************************/
+
+void
+AcpiExUnlinkMutex (
+ ACPI_OPERAND_OBJECT *ObjDesc)
+{
+ ACPI_THREAD_STATE *Thread = ObjDesc->Mutex.OwnerThread;
+
+
+ if (!Thread)
+ {
+ return;
+ }
+
+ /* Doubly linked list */
+
+ if (ObjDesc->Mutex.Next)
+ {
+ (ObjDesc->Mutex.Next)->Mutex.Prev = ObjDesc->Mutex.Prev;
+ }
+
+ if (ObjDesc->Mutex.Prev)
+ {
+ (ObjDesc->Mutex.Prev)->Mutex.Next = ObjDesc->Mutex.Next;
+
+ /*
+ * Migrate the previous sync level associated with this mutex to
+ * the previous mutex on the list so that it may be preserved.
+ * This handles the case where several mutexes have been acquired
+ * at the same level, but are not released in opposite order.
+ */
+ (ObjDesc->Mutex.Prev)->Mutex.OriginalSyncLevel =
+ ObjDesc->Mutex.OriginalSyncLevel;
+ }
+ else
+ {
+ Thread->AcquiredMutexList = ObjDesc->Mutex.Next;
+ }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExLinkMutex
+ *
+ * PARAMETERS: ObjDesc - The mutex to be linked
+ * Thread - Current executing thread object
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Add a mutex to the "AcquiredMutex" list for this walk
+ *
+ ******************************************************************************/
+
+static void
+AcpiExLinkMutex (
+ ACPI_OPERAND_OBJECT *ObjDesc,
+ ACPI_THREAD_STATE *Thread)
+{
+ ACPI_OPERAND_OBJECT *ListHead;
+
+
+ ListHead = Thread->AcquiredMutexList;
+
+ /* This object will be the first object in the list */
+
+ ObjDesc->Mutex.Prev = NULL;
+ ObjDesc->Mutex.Next = ListHead;
+
+ /* Update old first object to point back to this object */
+
+ if (ListHead)
+ {
+ ListHead->Mutex.Prev = ObjDesc;
+ }
+
+ /* Update list head */
+
+ Thread->AcquiredMutexList = ObjDesc;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExAcquireMutexObject
+ *
+ * PARAMETERS: Timeout - Timeout in milliseconds
+ * ObjDesc - Mutex object
+ * ThreadId - Current thread state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Acquire an AML mutex, low-level interface. Provides a common
+ * path that supports multiple acquires by the same thread.
+ *
+ * MUTEX: Interpreter must be locked
+ *
+ * NOTE: This interface is called from three places:
+ * 1) From AcpiExAcquireMutex, via an AML Acquire() operator
+ * 2) From AcpiExAcquireGlobalLock when an AML Field access requires the
+ * global lock
+ * 3) From the external interface, AcpiAcquireGlobalLock
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiExAcquireMutexObject (
+ UINT16 Timeout,
+ ACPI_OPERAND_OBJECT *ObjDesc,
+ ACPI_THREAD_ID ThreadId)
+{
+ ACPI_STATUS Status;
+
+
+ ACPI_FUNCTION_TRACE_PTR (ExAcquireMutexObject, ObjDesc);
+
+
+ if (!ObjDesc)
+ {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ /* Support for multiple acquires by the owning thread */
+
+ if (ObjDesc->Mutex.ThreadId == ThreadId)
+ {
+ /*
+ * The mutex is already owned by this thread, just increment the
+ * acquisition depth
+ */
+ ObjDesc->Mutex.AcquisitionDepth++;
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /* Acquire the mutex, wait if necessary. Special case for Global Lock */
+
+ if (ObjDesc == AcpiGbl_GlobalLockMutex)
+ {
+ Status = AcpiEvAcquireGlobalLock (Timeout);
+ }
+ else
+ {
+ Status = AcpiExSystemWaitMutex (ObjDesc->Mutex.OsMutex,
+ Timeout);
+ }
+
+ if (ACPI_FAILURE (Status))
+ {
+ /* Includes failure from a timeout on TimeDesc */
+
+ return_ACPI_STATUS (Status);
+ }
+
+ /* Acquired the mutex: update mutex object */
+
+ ObjDesc->Mutex.ThreadId = ThreadId;
+ ObjDesc->Mutex.AcquisitionDepth = 1;
+ ObjDesc->Mutex.OriginalSyncLevel = 0;
+ ObjDesc->Mutex.OwnerThread = NULL; /* Used only for AML Acquire() */
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExAcquireMutex
+ *
+ * PARAMETERS: TimeDesc - Timeout integer
+ * ObjDesc - Mutex object
+ * WalkState - Current method execution state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Acquire an AML mutex
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiExAcquireMutex (
+ ACPI_OPERAND_OBJECT *TimeDesc,
+ ACPI_OPERAND_OBJECT *ObjDesc,
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_STATUS Status;
+
+
+ ACPI_FUNCTION_TRACE_PTR (ExAcquireMutex, ObjDesc);
+
+
+ if (!ObjDesc)
+ {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ /* Must have a valid thread state struct */
+
+ if (!WalkState->Thread)
+ {
+ ACPI_ERROR ((AE_INFO,
+ "Cannot acquire Mutex [%4.4s], null thread info",
+ AcpiUtGetNodeName (ObjDesc->Mutex.Node)));
+ return_ACPI_STATUS (AE_AML_INTERNAL);
+ }
+
+ /*
+ * Current sync level must be less than or equal to the sync level of the
+ * mutex. This mechanism provides some deadlock prevention
+ */
+ if (WalkState->Thread->CurrentSyncLevel > ObjDesc->Mutex.SyncLevel)
+ {
+ ACPI_ERROR ((AE_INFO,
+ "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%u)",
+ AcpiUtGetNodeName (ObjDesc->Mutex.Node),
+ WalkState->Thread->CurrentSyncLevel));
+ return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
+ }
+
+ Status = AcpiExAcquireMutexObject ((UINT16) TimeDesc->Integer.Value,
+ ObjDesc, WalkState->Thread->ThreadId);
+ if (ACPI_SUCCESS (Status) && ObjDesc->Mutex.AcquisitionDepth == 1)
+ {
+ /* Save Thread object, original/current sync levels */
+
+ ObjDesc->Mutex.OwnerThread = WalkState->Thread;
+ ObjDesc->Mutex.OriginalSyncLevel = WalkState->Thread->CurrentSyncLevel;
+ WalkState->Thread->CurrentSyncLevel = ObjDesc->Mutex.SyncLevel;
+
+ /* Link the mutex to the current thread for force-unlock at method exit */
+
+ AcpiExLinkMutex (ObjDesc, WalkState->Thread);
+ }
+
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExReleaseMutexObject
+ *
+ * PARAMETERS: ObjDesc - The object descriptor for this op
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Release a previously acquired Mutex, low level interface.
+ * Provides a common path that supports multiple releases (after
+ * previous multiple acquires) by the same thread.
+ *
+ * MUTEX: Interpreter must be locked
+ *
+ * NOTE: This interface is called from three places:
+ * 1) From AcpiExReleaseMutex, via an AML Acquire() operator
+ * 2) From AcpiExReleaseGlobalLock when an AML Field access requires the
+ * global lock
+ * 3) From the external interface, AcpiReleaseGlobalLock
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiExReleaseMutexObject (
+ ACPI_OPERAND_OBJECT *ObjDesc)
+{
+ ACPI_STATUS Status = AE_OK;
+
+
+ ACPI_FUNCTION_TRACE (ExReleaseMutexObject);
+
+
+ if (ObjDesc->Mutex.AcquisitionDepth == 0)
+ {
+ return_ACPI_STATUS (AE_NOT_ACQUIRED);
+ }
+
+ /* Match multiple Acquires with multiple Releases */
+
+ ObjDesc->Mutex.AcquisitionDepth--;
+ if (ObjDesc->Mutex.AcquisitionDepth != 0)
+ {
+ /* Just decrement the depth and return */
+
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ if (ObjDesc->Mutex.OwnerThread)
+ {
+ /* Unlink the mutex from the owner's list */
+
+ AcpiExUnlinkMutex (ObjDesc);
+ ObjDesc->Mutex.OwnerThread = NULL;
+ }
+
+ /* Release the mutex, special case for Global Lock */
+
+ if (ObjDesc == AcpiGbl_GlobalLockMutex)
+ {
+ Status = AcpiEvReleaseGlobalLock ();
+ }
+ else
+ {
+ AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex);
+ }
+
+ /* Clear mutex info */
+
+ ObjDesc->Mutex.ThreadId = 0;
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExReleaseMutex
+ *
+ * PARAMETERS: ObjDesc - The object descriptor for this op
+ * WalkState - Current method execution state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Release a previously acquired Mutex.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiExReleaseMutex (
+ ACPI_OPERAND_OBJECT *ObjDesc,
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_STATUS Status = AE_OK;
+ UINT8 PreviousSyncLevel;
+ ACPI_THREAD_STATE *OwnerThread;
+
+
+ ACPI_FUNCTION_TRACE (ExReleaseMutex);
+
+
+ if (!ObjDesc)
+ {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ OwnerThread = ObjDesc->Mutex.OwnerThread;
+
+ /* The mutex must have been previously acquired in order to release it */
+
+ if (!OwnerThread)
+ {
+ ACPI_ERROR ((AE_INFO,
+ "Cannot release Mutex [%4.4s], not acquired",
+ AcpiUtGetNodeName (ObjDesc->Mutex.Node)));
+ return_ACPI_STATUS (AE_AML_MUTEX_NOT_ACQUIRED);
+ }
+
+ /* Must have a valid thread ID */
+
+ if (!WalkState->Thread)
+ {
+ ACPI_ERROR ((AE_INFO,
+ "Cannot release Mutex [%4.4s], null thread info",
+ AcpiUtGetNodeName (ObjDesc->Mutex.Node)));
+ return_ACPI_STATUS (AE_AML_INTERNAL);
+ }
+
+ /*
+ * The Mutex is owned, but this thread must be the owner.
+ * Special case for Global Lock, any thread can release
+ */
+ if ((OwnerThread->ThreadId != WalkState->Thread->ThreadId) &&
+ (ObjDesc != AcpiGbl_GlobalLockMutex))
+ {
+ ACPI_ERROR ((AE_INFO,
+ "Thread %u cannot release Mutex [%4.4s] acquired by thread %u",
+ (UINT32) WalkState->Thread->ThreadId,
+ AcpiUtGetNodeName (ObjDesc->Mutex.Node),
+ (UINT32) OwnerThread->ThreadId));
+ return_ACPI_STATUS (AE_AML_NOT_OWNER);
+ }
+
+ /*
+ * The sync level of the mutex must be equal to the current sync level. In
+ * other words, the current level means that at least one mutex at that
+ * level is currently being held. Attempting to release a mutex of a
+ * different level can only mean that the mutex ordering rule is being
+ * violated. This behavior is clarified in ACPI 4.0 specification.
+ */
+ if (ObjDesc->Mutex.SyncLevel != OwnerThread->CurrentSyncLevel)
+ {
+ ACPI_ERROR ((AE_INFO,
+ "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u",
+ AcpiUtGetNodeName (ObjDesc->Mutex.Node),
+ ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel));
+ return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
+ }
+
+ /*
+ * Get the previous SyncLevel from the head of the acquired mutex list.
+ * This handles the case where several mutexes at the same level have been
+ * acquired, but are not released in reverse order.
+ */
+ PreviousSyncLevel =
+ OwnerThread->AcquiredMutexList->Mutex.OriginalSyncLevel;
+
+ Status = AcpiExReleaseMutexObject (ObjDesc);
+ if (ACPI_FAILURE (Status))
+ {
+ return_ACPI_STATUS (Status);
+ }
+
+ if (ObjDesc->Mutex.AcquisitionDepth == 0)
+ {
+ /* Restore the previous SyncLevel */
+
+ OwnerThread->CurrentSyncLevel = PreviousSyncLevel;
+ }
+
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExReleaseAllMutexes
+ *
+ * PARAMETERS: Thread - Current executing thread object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Release all mutexes held by this thread
+ *
+ * NOTE: This function is called as the thread is exiting the interpreter.
+ * Mutexes are not released when an individual control method is exited, but
+ * only when the parent thread actually exits the interpreter. This allows one
+ * method to acquire a mutex, and a different method to release it, as long as
+ * this is performed underneath a single parent control method.
+ *
+ ******************************************************************************/
+
+void
+AcpiExReleaseAllMutexes (
+ ACPI_THREAD_STATE *Thread)
+{
+ ACPI_OPERAND_OBJECT *Next = Thread->AcquiredMutexList;
+ ACPI_OPERAND_OBJECT *ObjDesc;
+
+
+ ACPI_FUNCTION_NAME (ExReleaseAllMutexes);
+
+
+ /* Traverse the list of owned mutexes, releasing each one */
+
+ while (Next)
+ {
+ ObjDesc = Next;
+ Next = ObjDesc->Mutex.Next;
+
+ ObjDesc->Mutex.Prev = NULL;
+ ObjDesc->Mutex.Next = NULL;
+ ObjDesc->Mutex.AcquisitionDepth = 0;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "Force-releasing held mutex: %p\n", ObjDesc));
+
+ /* Release the mutex, special case for Global Lock */
+
+ if (ObjDesc == AcpiGbl_GlobalLockMutex)
+ {
+ /* Ignore errors */
+
+ (void) AcpiEvReleaseGlobalLock ();
+ }
+ else
+ {
+ AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex);
+ }
+
+ /* Mark mutex unowned */
+
+ ObjDesc->Mutex.OwnerThread = NULL;
+ ObjDesc->Mutex.ThreadId = 0;
+
+ /* Update Thread SyncLevel (Last mutex is the important one) */
+
+ Thread->CurrentSyncLevel = ObjDesc->Mutex.OriginalSyncLevel;
+ }
+}
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