| 0,0 → 1,558 |
|---|
| /******************************************************************************* |
| * |
| * Module Name: nseval - Object evaluation, includes control method execution |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 1. Copyright Notice |
| * |
| * Some or all of this work - Copyright (c) 1999 - 2010, 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. |
| * |
| *****************************************************************************/ |
| |
| #define __NSEVAL_C__ |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| #include "acparser.h" |
| #include "acinterp.h" |
| #include "acnamesp.h" |
| |
| |
| #define _COMPONENT ACPI_NAMESPACE |
| ACPI_MODULE_NAME ("nseval") |
| |
| /* Local prototypes */ |
| |
| static void |
| AcpiNsExecModuleCode ( |
| ACPI_OPERAND_OBJECT *MethodObj, |
| ACPI_EVALUATE_INFO *Info); |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsEvaluate |
| * |
| * PARAMETERS: Info - Evaluation info block, contains: |
| * PrefixNode - Prefix or Method/Object Node to execute |
| * Pathname - Name of method to execute, If NULL, the |
| * Node is the object to execute |
| * Parameters - List of parameters to pass to the method, |
| * terminated by NULL. Params itself may be |
| * NULL if no parameters are being passed. |
| * ReturnObject - Where to put method's return value (if |
| * any). If NULL, no value is returned. |
| * ParameterType - Type of Parameter list |
| * ReturnObject - Where to put method's return value (if |
| * any). If NULL, no value is returned. |
| * Flags - ACPI_IGNORE_RETURN_VALUE to delete return |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Execute a control method or return the current value of an |
| * ACPI namespace object. |
| * |
| * MUTEX: Locks interpreter |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiNsEvaluate ( |
| ACPI_EVALUATE_INFO *Info) |
| { |
| ACPI_STATUS Status; |
| ACPI_NAMESPACE_NODE *Node; |
| |
| |
| ACPI_FUNCTION_TRACE (NsEvaluate); |
| |
| |
| if (!Info) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| /* Initialize the return value to an invalid object */ |
| |
| Info->ReturnObject = NULL; |
| Info->ParamCount = 0; |
| |
| /* |
| * Get the actual namespace node for the target object. Handles these cases: |
| * |
| * 1) Null node, Pathname (absolute path) |
| * 2) Node, Pathname (path relative to Node) |
| * 3) Node, Null Pathname |
| */ |
| Status = AcpiNsGetNode (Info->PrefixNode, Info->Pathname, |
| ACPI_NS_NO_UPSEARCH, &Info->ResolvedNode); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* |
| * For a method alias, we must grab the actual method node so that proper |
| * scoping context will be established before execution. |
| */ |
| if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_LOCAL_METHOD_ALIAS) |
| { |
| Info->ResolvedNode = |
| ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->ResolvedNode->Object); |
| } |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", Info->Pathname, |
| Info->ResolvedNode, AcpiNsGetAttachedObject (Info->ResolvedNode))); |
| |
| Node = Info->ResolvedNode; |
| |
| /* |
| * Two major cases here: |
| * |
| * 1) The object is a control method -- execute it |
| * 2) The object is not a method -- just return it's current value |
| */ |
| if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_METHOD) |
| { |
| /* |
| * 1) Object is a control method - execute it |
| */ |
| |
| /* Verify that there is a method object associated with this node */ |
| |
| Info->ObjDesc = AcpiNsGetAttachedObject (Info->ResolvedNode); |
| if (!Info->ObjDesc) |
| { |
| ACPI_ERROR ((AE_INFO, "Control method has no attached sub-object")); |
| return_ACPI_STATUS (AE_NULL_OBJECT); |
| } |
| |
| /* Count the number of arguments being passed to the method */ |
| |
| if (Info->Parameters) |
| { |
| while (Info->Parameters[Info->ParamCount]) |
| { |
| if (Info->ParamCount > ACPI_METHOD_MAX_ARG) |
| { |
| return_ACPI_STATUS (AE_LIMIT); |
| } |
| Info->ParamCount++; |
| } |
| } |
| |
| ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method", |
| ACPI_LV_INFO, _COMPONENT); |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| "Method at AML address %p Length %X\n", |
| Info->ObjDesc->Method.AmlStart + 1, |
| Info->ObjDesc->Method.AmlLength - 1)); |
| |
| /* |
| * Any namespace deletion must acquire both the namespace and |
| * interpreter locks to ensure that no thread is using the portion of |
| * the namespace that is being deleted. |
| * |
| * Execute the method via the interpreter. The interpreter is locked |
| * here before calling into the AML parser |
| */ |
| AcpiExEnterInterpreter (); |
| Status = AcpiPsExecuteMethod (Info); |
| AcpiExExitInterpreter (); |
| } |
| else |
| { |
| /* |
| * 2) Object is not a method, return its current value |
| * |
| * Disallow certain object types. For these, "evaluation" is undefined. |
| */ |
| switch (Info->ResolvedNode->Type) |
| { |
| case ACPI_TYPE_DEVICE: |
| case ACPI_TYPE_EVENT: |
| case ACPI_TYPE_MUTEX: |
| case ACPI_TYPE_REGION: |
| case ACPI_TYPE_THERMAL: |
| case ACPI_TYPE_LOCAL_SCOPE: |
| |
| ACPI_ERROR ((AE_INFO, |
| "[%4.4s] Evaluation of object type [%s] is not supported", |
| Info->ResolvedNode->Name.Ascii, |
| AcpiUtGetTypeName (Info->ResolvedNode->Type))); |
| |
| return_ACPI_STATUS (AE_TYPE); |
| |
| default: |
| break; |
| } |
| |
| /* |
| * Objects require additional resolution steps (e.g., the Node may be |
| * a field that must be read, etc.) -- we can't just grab the object |
| * out of the node. |
| * |
| * Use ResolveNodeToValue() to get the associated value. |
| * |
| * NOTE: we can get away with passing in NULL for a walk state because |
| * ResolvedNode is guaranteed to not be a reference to either a method |
| * local or a method argument (because this interface is never called |
| * from a running method.) |
| * |
| * Even though we do not directly invoke the interpreter for object |
| * resolution, we must lock it because we could access an opregion. |
| * The opregion access code assumes that the interpreter is locked. |
| */ |
| AcpiExEnterInterpreter (); |
| |
| /* Function has a strange interface */ |
| |
| Status = AcpiExResolveNodeToValue (&Info->ResolvedNode, NULL); |
| AcpiExExitInterpreter (); |
| |
| /* |
| * If AcpiExResolveNodeToValue() succeeded, the return value was placed |
| * in ResolvedNode. |
| */ |
| if (ACPI_SUCCESS (Status)) |
| { |
| Status = AE_CTRL_RETURN_VALUE; |
| Info->ReturnObject = |
| ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->ResolvedNode); |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n", |
| Info->ReturnObject, |
| AcpiUtGetObjectTypeName (Info->ReturnObject))); |
| } |
| } |
| |
| /* |
| * Check input argument count against the ASL-defined count for a method. |
| * Also check predefined names: argument count and return value against |
| * the ACPI specification. Some incorrect return value types are repaired. |
| */ |
| (void) AcpiNsCheckPredefinedNames (Node, Info->ParamCount, |
| Status, &Info->ReturnObject); |
| |
| /* Check if there is a return value that must be dealt with */ |
| |
| if (Status == AE_CTRL_RETURN_VALUE) |
| { |
| /* If caller does not want the return value, delete it */ |
| |
| if (Info->Flags & ACPI_IGNORE_RETURN_VALUE) |
| { |
| AcpiUtRemoveReference (Info->ReturnObject); |
| Info->ReturnObject = NULL; |
| } |
| |
| /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ |
| |
| Status = AE_OK; |
| } |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, |
| "*** Completed evaluation of object %s ***\n", Info->Pathname)); |
| |
| /* |
| * Namespace was unlocked by the handling AcpiNs* function, so we |
| * just return |
| */ |
| return_ACPI_STATUS (Status); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsExecModuleCodeList |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: None. Exceptions during method execution are ignored, since |
| * we cannot abort a table load. |
| * |
| * DESCRIPTION: Execute all elements of the global module-level code list. |
| * Each element is executed as a single control method. |
| * |
| ******************************************************************************/ |
| |
| void |
| AcpiNsExecModuleCodeList ( |
| void) |
| { |
| ACPI_OPERAND_OBJECT *Prev; |
| ACPI_OPERAND_OBJECT *Next; |
| ACPI_EVALUATE_INFO *Info; |
| UINT32 MethodCount = 0; |
| |
| |
| ACPI_FUNCTION_TRACE (NsExecModuleCodeList); |
| |
| |
| /* Exit now if the list is empty */ |
| |
| Next = AcpiGbl_ModuleCodeList; |
| if (!Next) |
| { |
| return_VOID; |
| } |
| |
| /* Allocate the evaluation information block */ |
| |
| Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO)); |
| if (!Info) |
| { |
| return_VOID; |
| } |
| |
| /* Walk the list, executing each "method" */ |
| |
| while (Next) |
| { |
| Prev = Next; |
| Next = Next->Method.Mutex; |
| |
| /* Clear the link field and execute the method */ |
| |
| Prev->Method.Mutex = NULL; |
| AcpiNsExecModuleCode (Prev, Info); |
| MethodCount++; |
| |
| /* Delete the (temporary) method object */ |
| |
| AcpiUtRemoveReference (Prev); |
| } |
| |
| ACPI_INFO ((AE_INFO, |
| "Executed %u blocks of module-level executable AML code", |
| MethodCount)); |
| |
| ACPI_FREE (Info); |
| AcpiGbl_ModuleCodeList = NULL; |
| return_VOID; |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsExecModuleCode |
| * |
| * PARAMETERS: MethodObj - Object container for the module-level code |
| * Info - Info block for method evaluation |
| * |
| * RETURN: None. Exceptions during method execution are ignored, since |
| * we cannot abort a table load. |
| * |
| * DESCRIPTION: Execute a control method containing a block of module-level |
| * executable AML code. The control method is temporarily |
| * installed to the root node, then evaluated. |
| * |
| ******************************************************************************/ |
| |
| static void |
| AcpiNsExecModuleCode ( |
| ACPI_OPERAND_OBJECT *MethodObj, |
| ACPI_EVALUATE_INFO *Info) |
| { |
| ACPI_OPERAND_OBJECT *ParentObj; |
| ACPI_NAMESPACE_NODE *ParentNode; |
| ACPI_OBJECT_TYPE Type; |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (NsExecModuleCode); |
| |
| |
| /* |
| * Get the parent node. We cheat by using the NextObject field |
| * of the method object descriptor. |
| */ |
| ParentNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, |
| MethodObj->Method.NextObject); |
| Type = AcpiNsGetType (ParentNode); |
| |
| /* |
| * Get the region handler and save it in the method object. We may need |
| * this if an operation region declaration causes a _REG method to be run. |
| * |
| * We can't do this in AcpiPsLinkModuleCode because |
| * AcpiGbl_RootNode->Object is NULL at PASS1. |
| */ |
| if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object) |
| { |
| MethodObj->Method.Extra.Handler = |
| ParentNode->Object->Device.Handler; |
| } |
| |
| /* Must clear NextObject (AcpiNsAttachObject needs the field) */ |
| |
| MethodObj->Method.NextObject = NULL; |
| |
| /* Initialize the evaluation information block */ |
| |
| ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO)); |
| Info->PrefixNode = ParentNode; |
| |
| /* |
| * Get the currently attached parent object. Add a reference, because the |
| * ref count will be decreased when the method object is installed to |
| * the parent node. |
| */ |
| ParentObj = AcpiNsGetAttachedObject (ParentNode); |
| if (ParentObj) |
| { |
| AcpiUtAddReference (ParentObj); |
| } |
| |
| /* Install the method (module-level code) in the parent node */ |
| |
| Status = AcpiNsAttachObject (ParentNode, MethodObj, |
| ACPI_TYPE_METHOD); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto Exit; |
| } |
| |
| /* Execute the parent node as a control method */ |
| |
| Status = AcpiNsEvaluate (Info); |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Executed module-level code at %p\n", |
| MethodObj->Method.AmlStart)); |
| |
| /* Delete a possible implicit return value (in slack mode) */ |
| |
| if (Info->ReturnObject) |
| { |
| AcpiUtRemoveReference (Info->ReturnObject); |
| } |
| |
| /* Detach the temporary method object */ |
| |
| AcpiNsDetachObject (ParentNode); |
| |
| /* Restore the original parent object */ |
| |
| if (ParentObj) |
| { |
| Status = AcpiNsAttachObject (ParentNode, ParentObj, Type); |
| } |
| else |
| { |
| ParentNode->Type = (UINT8) Type; |
| } |
| |
| Exit: |
| if (ParentObj) |
| { |
| AcpiUtRemoveReference (ParentObj); |
| } |
| return_VOID; |
| } |
| |