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Diffstat (limited to 'sys/contrib/dev/acpica/nseval.c')
| -rw-r--r-- | sys/contrib/dev/acpica/nseval.c | 614 |
1 files changed, 614 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/nseval.c b/sys/contrib/dev/acpica/nseval.c new file mode 100644 index 0000000..be29617 --- /dev/null +++ b/sys/contrib/dev/acpica/nseval.c @@ -0,0 +1,614 @@ +/******************************************************************************* + * + * Module Name: nseval - Object evaluation interfaces -- includes control + * method lookup and execution. + * $Revision: 119 $ + * + ******************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2002, 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 "acparser.h" +#include "acinterp.h" +#include "acnamesp.h" + + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nseval") + + +/******************************************************************************* + * + * FUNCTION: AcpiNsEvaluateRelative + * + * PARAMETERS: Handle - The relative containing object + * Pathname - Name of method to execute, If NULL, the + * handle is the object to execute + * Params - 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. + * + * RETURN: Status + * + * DESCRIPTION: Find and execute the requested method using the handle as a + * scope + * + * MUTEX: Locks Namespace + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsEvaluateRelative ( + ACPI_NAMESPACE_NODE *Handle, + NATIVE_CHAR *Pathname, + ACPI_OPERAND_OBJECT **Params, + ACPI_OPERAND_OBJECT **ReturnObject) +{ + ACPI_NAMESPACE_NODE *PrefixNode; + ACPI_STATUS Status; + ACPI_NAMESPACE_NODE *Node = NULL; + NATIVE_CHAR *InternalPath = NULL; + ACPI_GENERIC_STATE ScopeInfo; + + + ACPI_FUNCTION_TRACE ("NsEvaluateRelative"); + + + /* + * Must have a valid object handle + */ + if (!Handle) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* Build an internal name string for the method */ + + Status = AcpiNsInternalizeName (Pathname, &InternalPath); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Get the prefix handle and Node */ + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + PrefixNode = AcpiNsMapHandleToNode (Handle); + if (!PrefixNode) + { + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + Status = AE_BAD_PARAMETER; + goto Cleanup; + } + + /* Lookup the name in the namespace */ + + ScopeInfo.Scope.Node = PrefixNode; + Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY, + ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL, + &Node); + + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Object [%s] not found [%s]\n", + Pathname, AcpiFormatException (Status))); + goto Cleanup; + } + + /* + * Now that we have a handle to the object, we can attempt + * to evaluate it. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", + Pathname, Node, AcpiNsGetAttachedObject (Node))); + + Status = AcpiNsEvaluateByHandle (Node, Params, ReturnObject); + + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "*** Completed eval of object %s ***\n", + Pathname)); + +Cleanup: + + ACPI_MEM_FREE (InternalPath); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsEvaluateByName + * + * PARAMETERS: Pathname - Fully qualified pathname to the object + * ReturnObject - Where to put method's return value (if + * any). If NULL, no value is returned. + * Params - List of parameters to pass to the method, + * terminated by NULL. Params itself may be + * NULL if no parameters are being passed. + * + * RETURN: Status + * + * DESCRIPTION: Find and execute the requested method passing the given + * parameters + * + * MUTEX: Locks Namespace + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsEvaluateByName ( + NATIVE_CHAR *Pathname, + ACPI_OPERAND_OBJECT **Params, + ACPI_OPERAND_OBJECT **ReturnObject) +{ + ACPI_STATUS Status; + ACPI_NAMESPACE_NODE *Node = NULL; + NATIVE_CHAR *InternalPath = NULL; + + + ACPI_FUNCTION_TRACE ("NsEvaluateByName"); + + + /* Build an internal name string for the method */ + + Status = AcpiNsInternalizeName (Pathname, &InternalPath); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Lookup the name in the namespace */ + + Status = AcpiNsLookup (NULL, InternalPath, ACPI_TYPE_ANY, + ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL, + &Node); + + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Object at [%s] was not found, status=%.4X\n", + Pathname, Status)); + goto Cleanup; + } + + /* + * Now that we have a handle to the object, we can attempt + * to evaluate it. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", + Pathname, Node, AcpiNsGetAttachedObject (Node))); + + Status = AcpiNsEvaluateByHandle (Node, Params, ReturnObject); + + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "*** Completed eval of object %s ***\n", + Pathname)); + + +Cleanup: + + /* Cleanup */ + + if (InternalPath) + { + ACPI_MEM_FREE (InternalPath); + } + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsEvaluateByHandle + * + * PARAMETERS: Handle - Method Node to execute + * Params - 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. + * + * RETURN: Status + * + * DESCRIPTION: Execute the requested method passing the given parameters + * + * MUTEX: Locks Namespace + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsEvaluateByHandle ( + ACPI_NAMESPACE_NODE *Handle, + ACPI_OPERAND_OBJECT **Params, + ACPI_OPERAND_OBJECT **ReturnObject) +{ + ACPI_NAMESPACE_NODE *Node; + ACPI_STATUS Status; + ACPI_OPERAND_OBJECT *LocalReturnObject; + + + ACPI_FUNCTION_TRACE ("NsEvaluateByHandle"); + + + /* Check if namespace has been initialized */ + + if (!AcpiGbl_RootNode) + { + return_ACPI_STATUS (AE_NO_NAMESPACE); + } + + /* Parameter Validation */ + + if (!Handle) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + if (ReturnObject) + { + /* Initialize the return value to an invalid object */ + + *ReturnObject = NULL; + } + + /* Get the prefix handle and Node */ + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Node = AcpiNsMapHandleToNode (Handle); + if (!Node) + { + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * Two major cases here: + * 1) The object is an actual control method -- execute it. + * 2) The object is not a method -- just return it's current + * value + * + * In both cases, the namespace is unlocked by the + * AcpiNs* procedure + */ + if (AcpiNsGetType (Node) == ACPI_TYPE_METHOD) + { + /* + * Case 1) We have an actual control method to execute + */ + Status = AcpiNsExecuteControlMethod (Node, Params, + &LocalReturnObject); + } + else + { + /* + * Case 2) Object is NOT a method, just return its + * current value + */ + Status = AcpiNsGetObjectValue (Node, &LocalReturnObject); + } + + /* + * Check if there is a return value on the stack that must + * be dealt with + */ + if (Status == AE_CTRL_RETURN_VALUE) + { + /* + * If the Method returned a value and the caller + * provided a place to store a returned value, Copy + * the returned value to the object descriptor provided + * by the caller. + */ + if (ReturnObject) + { + /* + * Valid return object, copy the pointer to + * the returned object + */ + *ReturnObject = LocalReturnObject; + } + + /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ + + Status = AE_OK; + } + + /* + * Namespace was unlocked by the handling AcpiNs* function, + * so we just return + */ + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsExecuteControlMethod + * + * PARAMETERS: MethodNode - The method to execute + * Params - List of parameters to pass to the method, + * terminated by NULL. Params itself may be + * NULL if no parameters are being passed. + * ReturnObjDesc - List of result objects to be returned + * from the method. + * + * RETURN: Status + * + * DESCRIPTION: Execute the requested method passing the given parameters + * + * MUTEX: Assumes namespace is locked + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsExecuteControlMethod ( + ACPI_NAMESPACE_NODE *MethodNode, + ACPI_OPERAND_OBJECT **Params, + ACPI_OPERAND_OBJECT **ReturnObjDesc) +{ + ACPI_STATUS Status; + ACPI_OPERAND_OBJECT *ObjDesc; + + + ACPI_FUNCTION_TRACE ("NsExecuteControlMethod"); + + + /* Verify that there is a method associated with this object */ + + ObjDesc = AcpiNsGetAttachedObject (MethodNode); + if (!ObjDesc) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No attached method object\n")); + + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return_ACPI_STATUS (AE_NULL_OBJECT); + } + + ACPI_DUMP_PATHNAME (MethodNode, "Execute Method:", + ACPI_LV_INFO, _COMPONENT); + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Method at AML address %p Length %X\n", + ObjDesc->Method.AmlStart + 1, ObjDesc->Method.AmlLength - 1)); + + /* + * Unlock the namespace before execution. This allows namespace access + * via the external Acpi* interfaces while a method is being executed. + * However, 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. + */ + Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* + * Execute the method via the interpreter. The interpreter is locked + * here before calling into the AML parser + */ + Status = AcpiExEnterInterpreter (); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiPsxExecute (MethodNode, Params, ReturnObjDesc); + AcpiExExitInterpreter (); + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsGetObjectValue + * + * PARAMETERS: Node - The object + * ReturnObjDesc - Where the objects value is returned + * + * RETURN: Status + * + * DESCRIPTION: Return the current value of the object + * + * MUTEX: Assumes namespace is locked, leaves namespace unlocked + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsGetObjectValue ( + ACPI_NAMESPACE_NODE *Node, + ACPI_OPERAND_OBJECT **ReturnObjDesc) +{ + ACPI_STATUS Status = AE_OK; + ACPI_NAMESPACE_NODE *ResolvedNode = Node; + + + ACPI_FUNCTION_TRACE ("NsGetObjectValue"); + + + /* + * 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. This call + * always deletes ObjDesc (allocated above). + * + * NOTE: we can get away with passing in NULL for a walk state + * because ObjDesc is guaranteed to not be a reference to either + * a method local or a method argument (because this interface can only be + * called from the AcpiEvaluate external interface, never called from + * a running control method.) + * + * Even though we do not directly invoke the interpreter + * for this, we must enter it because we could access an opregion. + * The opregion access code assumes that the interpreter + * is locked. + * + * We must release the namespace lock before entering the + * intepreter. + */ + Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiExEnterInterpreter (); + if (ACPI_SUCCESS (Status)) + { + Status = AcpiExResolveNodeToValue (&ResolvedNode, NULL); + /* + * If AcpiExResolveNodeToValue() succeeded, the return value was + * placed in ResolvedNode. + */ + AcpiExExitInterpreter (); + + if (ACPI_SUCCESS (Status)) + { + Status = AE_CTRL_RETURN_VALUE; + *ReturnObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ResolvedNode); + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n", + *ReturnObjDesc, AcpiUtGetObjectTypeName (*ReturnObjDesc))); + } + } + + /* Namespace is unlocked */ + + return_ACPI_STATUS (Status); +} + |
