--- /dev/null
+/*******************************************************************************
+ *
+ * Module Name: nseval - Object evaluation, includes control method execution
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ * 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 "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
+ * RelativePath - 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_FUNCTION_TRACE (NsEvaluate);
+
+
+ if (!Info)
+ {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ if (!Info->Node)
+ {
+ /*
+ * Get the actual namespace node for the target object if we
+ * need to. Handles these cases:
+ *
+ * 1) Null node, valid pathname from root (absolute path)
+ * 2) Node and valid pathname (path relative to Node)
+ * 3) Node, Null pathname
+ */
+ Status = AcpiNsGetNode (Info->PrefixNode, Info->RelativePathname,
+ ACPI_NS_NO_UPSEARCH, &Info->Node);
+ 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->Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
+ {
+ Info->Node = ACPI_CAST_PTR (
+ ACPI_NAMESPACE_NODE, Info->Node->Object);
+ }
+
+ /* Complete the info block initialization */
+
+ Info->ReturnObject = NULL;
+ Info->NodeFlags = Info->Node->Flags;
+ Info->ObjDesc = AcpiNsGetAttachedObject (Info->Node);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
+ Info->RelativePathname, Info->Node,
+ AcpiNsGetAttachedObject (Info->Node)));
+
+ /* Get info if we have a predefined name (_HID, etc.) */
+
+ Info->Predefined = AcpiUtMatchPredefinedMethod (Info->Node->Name.Ascii);
+
+ /* Get the full pathname to the object, for use in warning messages */
+
+ Info->FullPathname = AcpiNsGetExternalPathname (Info->Node);
+ if (!Info->FullPathname)
+ {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /* Count the number of arguments being passed in */
+
+ Info->ParamCount = 0;
+ if (Info->Parameters)
+ {
+ while (Info->Parameters[Info->ParamCount])
+ {
+ Info->ParamCount++;
+ }
+
+ /* Warn on impossible argument count */
+
+ if (Info->ParamCount > ACPI_METHOD_NUM_ARGS)
+ {
+ ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS,
+ "Excess arguments (%u) - using only %u",
+ Info->ParamCount, ACPI_METHOD_NUM_ARGS));
+
+ Info->ParamCount = ACPI_METHOD_NUM_ARGS;
+ }
+ }
+
+ /*
+ * For predefined names: Check that the declared argument count
+ * matches the ACPI spec -- otherwise this is a BIOS error.
+ */
+ AcpiNsCheckAcpiCompliance (Info->FullPathname, Info->Node,
+ Info->Predefined);
+
+ /*
+ * For all names: Check that the incoming argument count for
+ * this method/object matches the actual ASL/AML definition.
+ */
+ AcpiNsCheckArgumentCount (Info->FullPathname, Info->Node,
+ Info->ParamCount, Info->Predefined);
+
+ /* For predefined names: Typecheck all incoming arguments */
+
+ AcpiNsCheckArgumentTypes (Info);
+
+ /*
+ * Three major evaluation cases:
+ *
+ * 1) Object types that cannot be evaluated by definition
+ * 2) The object is a control method -- execute it
+ * 3) The object is not a method -- just return it's current value
+ */
+ switch (AcpiNsGetType (Info->Node))
+ {
+ 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:
+ /*
+ * 1) Disallow evaluation of certain object types. For these,
+ * object evaluation is undefined and not supported.
+ */
+ ACPI_ERROR ((AE_INFO,
+ "%s: Evaluation of object type [%s] is not supported",
+ Info->FullPathname,
+ AcpiUtGetTypeName (Info->Node->Type)));
+
+ Status = AE_TYPE;
+ goto Cleanup;
+
+ case ACPI_TYPE_METHOD:
+ /*
+ * 2) Object is a control method - execute it
+ */
+
+ /* Verify that there is a method object associated with this node */
+
+ if (!Info->ObjDesc)
+ {
+ ACPI_ERROR ((AE_INFO, "%s: Method has no attached sub-object",
+ Info->FullPathname));
+ Status = AE_NULL_OBJECT;
+ goto Cleanup;
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "**** Execute method [%s] at AML address %p length %X\n",
+ Info->FullPathname,
+ 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 ();
+ break;
+
+ default:
+ /*
+ * 3) All other non-method objects -- get the current object value
+ */
+
+ /*
+ * Some 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
+ * the Node 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 ();
+
+ /* TBD: ResolveNodeToValue has a strange interface, fix */
+
+ Info->ReturnObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->Node);
+
+ Status = AcpiExResolveNodeToValue (ACPI_CAST_INDIRECT_PTR (
+ ACPI_NAMESPACE_NODE, &Info->ReturnObject), NULL);
+ AcpiExExitInterpreter ();
+
+ if (ACPI_FAILURE (Status))
+ {
+ goto Cleanup;
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returned object %p [%s]\n",
+ Info->ReturnObject,
+ AcpiUtGetObjectTypeName (Info->ReturnObject)));
+
+ Status = AE_CTRL_RETURN_VALUE; /* Always has a "return value" */
+ break;
+ }
+
+ /*
+ * For predefined names, check the return value against the ACPI
+ * specification. Some incorrect return value types are repaired.
+ */
+ (void) AcpiNsCheckReturnValue (Info->Node, Info, 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->RelativePathname));
+
+Cleanup:
+ /*
+ * Namespace was unlocked by the handling AcpiNs* function, so we
+ * just free the pathname and return
+ */
+ ACPI_FREE (Info->FullPathname);
+ Info->FullPathname = NULL;
+ 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.Dispatch.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;
+}
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