FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/executer/exstoren.c

     /******************************************************************************
      *
      * Module Name: exstoren - AML Interpreter object store support,
      *                        Store to Node (namespace object)
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
     * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acinterp.h>
   #include <contrib/dev/acpica/include/amlcode.h>
   
   
   #define _COMPONENT          ACPI_EXECUTER
           ACPI_MODULE_NAME    ("exstoren")
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExResolveObject
    *
    * PARAMETERS:  SourceDescPtr       - Pointer to the source object
    *              TargetType          - Current type of the target
    *              WalkState           - Current walk state
    *
    * RETURN:      Status, resolved object in SourceDescPtr.
    *
    * DESCRIPTION: Resolve an object. If the object is a reference, dereference
    *              it and return the actual object in the SourceDescPtr.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExResolveObject (
       ACPI_OPERAND_OBJECT     **SourceDescPtr,
       ACPI_OBJECT_TYPE        TargetType,
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_OPERAND_OBJECT     *SourceDesc = *SourceDescPtr;
       ACPI_STATUS             Status = AE_OK;
   
   
       ACPI_FUNCTION_TRACE (ExResolveObject);
   
   
       /* Ensure we have a Target that can be stored to */
   
       switch (TargetType)
       {
       case ACPI_TYPE_BUFFER_FIELD:
       case ACPI_TYPE_LOCAL_REGION_FIELD:
       case ACPI_TYPE_LOCAL_BANK_FIELD:
       case ACPI_TYPE_LOCAL_INDEX_FIELD:
           /*
            * These cases all require only Integers or values that
            * can be converted to Integers (Strings or Buffers)
            */
       case ACPI_TYPE_INTEGER:
       case ACPI_TYPE_STRING:
       case ACPI_TYPE_BUFFER:
           /*
            * Stores into a Field/Region or into a Integer/Buffer/String
            * are all essentially the same. This case handles the
            * "interchangeable" types Integer, String, and Buffer.
            */
           if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
           {
               /* Resolve a reference object first */
   
               Status = AcpiExResolveToValue (SourceDescPtr, WalkState);
               if (ACPI_FAILURE (Status))
               {
                   break;
               }
           }
   
           /* For CopyObject, no further validation necessary */
   
           if (WalkState->Opcode == AML_COPY_OBJECT_OP)
           {
               break;
           }
   
           /* Must have a Integer, Buffer, or String */
   
           if ((SourceDesc->Common.Type != ACPI_TYPE_INTEGER)    &&
               (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)     &&
               (SourceDesc->Common.Type != ACPI_TYPE_STRING)     &&
               !((SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                   (SourceDesc->Reference.Class== ACPI_REFCLASS_TABLE)))
           {
               /* Conversion successful but still not a valid type */
   
               ACPI_ERROR ((AE_INFO,
                   "Cannot assign type [%s] to [%s] (must be type Int/Str/Buf)",
                   AcpiUtGetObjectTypeName (SourceDesc),
                   AcpiUtGetTypeName (TargetType)));
   
               Status = AE_AML_OPERAND_TYPE;
           }
           break;
   
       case ACPI_TYPE_LOCAL_ALIAS:
       case ACPI_TYPE_LOCAL_METHOD_ALIAS:
           /*
            * All aliases should have been resolved earlier, during the
            * operand resolution phase.
            */
           ACPI_ERROR ((AE_INFO, "Store into an unresolved Alias object"));
           Status = AE_AML_INTERNAL;
           break;
   
       case ACPI_TYPE_PACKAGE:
       default:
           /*
            * All other types than Alias and the various Fields come here,
            * including the untyped case - ACPI_TYPE_ANY.
            */
           break;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExStoreObjectToObject
    *
    * PARAMETERS:  SourceDesc          - Object to store
    *              DestDesc            - Object to receive a copy of the source
    *              NewDesc             - New object if DestDesc is obsoleted
    *              WalkState           - Current walk state
    *
    * RETURN:      Status
    *
    * DESCRIPTION: "Store" an object to another object. This may include
    *              converting the source type to the target type (implicit
    *              conversion), and a copy of the value of the source to
    *              the target.
    *
    *              The Assignment of an object to another (not named) object
    *              is handled here.
    *              The Source passed in will replace the current value (if any)
    *              with the input value.
    *
    *              When storing into an object the data is converted to the
    *              target object type then stored in the object. This means
    *              that the target object type (for an initialized target) will
    *              not be changed by a store operation.
    *
    *              This module allows destination types of Number, String,
    *              Buffer, and Package.
    *
    *              Assumes parameters are already validated. NOTE: SourceDesc
    *              resolution (from a reference object) must be performed by
    *              the caller if necessary.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExStoreObjectToObject (
       ACPI_OPERAND_OBJECT     *SourceDesc,
       ACPI_OPERAND_OBJECT     *DestDesc,
       ACPI_OPERAND_OBJECT     **NewDesc,
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_OPERAND_OBJECT     *ActualSrcDesc;
       ACPI_STATUS             Status = AE_OK;
   
   
       ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToObject, SourceDesc);
   
   
       ActualSrcDesc = SourceDesc;
       if (!DestDesc)
       {
           /*
            * There is no destination object (An uninitialized node or
            * package element), so we can simply copy the source object
            * creating a new destination object
            */
           Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, NewDesc, WalkState);
           return_ACPI_STATUS (Status);
       }
   
       if (SourceDesc->Common.Type != DestDesc->Common.Type)
       {
           /*
            * The source type does not match the type of the destination.
            * Perform the "implicit conversion" of the source to the current type
            * of the target as per the ACPI specification.
            *
            * If no conversion performed, ActualSrcDesc = SourceDesc.
            * Otherwise, ActualSrcDesc is a temporary object to hold the
            * converted object.
            */
           Status = AcpiExConvertToTargetType (DestDesc->Common.Type,
               SourceDesc, &ActualSrcDesc, WalkState);
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           if (SourceDesc == ActualSrcDesc)
           {
               /*
                * No conversion was performed. Return the SourceDesc as the
                * new object.
                */
               *NewDesc = SourceDesc;
               return_ACPI_STATUS (AE_OK);
           }
       }
   
       /*
        * We now have two objects of identical types, and we can perform a
        * copy of the *value* of the source object.
        */
       switch (DestDesc->Common.Type)
       {
       case ACPI_TYPE_INTEGER:
   
           DestDesc->Integer.Value = ActualSrcDesc->Integer.Value;
   
           /* Truncate value if we are executing from a 32-bit ACPI table */
   
           (void) AcpiExTruncateFor32bitTable (DestDesc);
           break;
   
       case ACPI_TYPE_STRING:
   
           Status = AcpiExStoreStringToString (ActualSrcDesc, DestDesc);
           break;
   
       case ACPI_TYPE_BUFFER:
   
           Status = AcpiExStoreBufferToBuffer (ActualSrcDesc, DestDesc);
           break;
   
       case ACPI_TYPE_PACKAGE:
   
           Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, &DestDesc,
                       WalkState);
           break;
   
       default:
           /*
            * All other types come here.
            */
           ACPI_WARNING ((AE_INFO, "Store into type [%s] not implemented",
               AcpiUtGetObjectTypeName (DestDesc)));
   
           Status = AE_NOT_IMPLEMENTED;
           break;
       }
   
       if (ActualSrcDesc != SourceDesc)
       {
           /* Delete the intermediate (temporary) source object */
   
           AcpiUtRemoveReference (ActualSrcDesc);
       }
   
       *NewDesc = DestDesc;
       return_ACPI_STATUS (Status);
   }

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