/****************************************************************************** * * Module Name: nsconvert - Object conversions for objects returned by * predefined methods * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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 #include #include #include #include #include #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME ("nsconvert") /******************************************************************************* * * FUNCTION: AcpiNsConvertToInteger * * PARAMETERS: OriginalObject - Object to be converted * ReturnObject - Where the new converted object is returned * * RETURN: Status. AE_OK if conversion was successful. * * DESCRIPTION: Attempt to convert a String/Buffer object to an Integer. * ******************************************************************************/ ACPI_STATUS AcpiNsConvertToInteger ( ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject) { ACPI_OPERAND_OBJECT *NewObject; ACPI_STATUS Status; UINT64 Value = 0; UINT32 i; switch (OriginalObject->Common.Type) { case ACPI_TYPE_STRING: /* String-to-Integer conversion */ Status = AcpiUtStrtoul64 (OriginalObject->String.Pointer, &Value); if (ACPI_FAILURE (Status)) { return (Status); } break; case ACPI_TYPE_BUFFER: /* Buffer-to-Integer conversion. Max buffer size is 64 bits. */ if (OriginalObject->Buffer.Length > 8) { return (AE_AML_OPERAND_TYPE); } /* Extract each buffer byte to create the integer */ for (i = 0; i < OriginalObject->Buffer.Length; i++) { Value |= ((UINT64) OriginalObject->Buffer.Pointer[i] << (i * 8)); } break; default: return (AE_AML_OPERAND_TYPE); } NewObject = AcpiUtCreateIntegerObject (Value); if (!NewObject) { return (AE_NO_MEMORY); } *ReturnObject = NewObject; return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiNsConvertToString * * PARAMETERS: OriginalObject - Object to be converted * ReturnObject - Where the new converted object is returned * * RETURN: Status. AE_OK if conversion was successful. * * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String. * ******************************************************************************/ ACPI_STATUS AcpiNsConvertToString ( ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject) { ACPI_OPERAND_OBJECT *NewObject; ACPI_SIZE Length; ACPI_STATUS Status; switch (OriginalObject->Common.Type) { case ACPI_TYPE_INTEGER: /* * Integer-to-String conversion. Commonly, convert * an integer of value 0 to a NULL string. The last element of * _BIF and _BIX packages occasionally need this fix. */ if (OriginalObject->Integer.Value == 0) { /* Allocate a new NULL string object */ NewObject = AcpiUtCreateStringObject (0); if (!NewObject) { return (AE_NO_MEMORY); } } else { Status = AcpiExConvertToString (OriginalObject, &NewObject, ACPI_IMPLICIT_CONVERT_HEX); if (ACPI_FAILURE (Status)) { return (Status); } } break; case ACPI_TYPE_BUFFER: /* * Buffer-to-String conversion. Use a ToString * conversion, no transform performed on the buffer data. The best * example of this is the _BIF method, where the string data from * the battery is often (incorrectly) returned as buffer object(s). */ Length = 0; while ((Length < OriginalObject->Buffer.Length) && (OriginalObject->Buffer.Pointer[Length])) { Length++; } /* Allocate a new string object */ NewObject = AcpiUtCreateStringObject (Length); if (!NewObject) { return (AE_NO_MEMORY); } /* * Copy the raw buffer data with no transform. String is already NULL * terminated at Length+1. */ memcpy (NewObject->String.Pointer, OriginalObject->Buffer.Pointer, Length); break; default: return (AE_AML_OPERAND_TYPE); } *ReturnObject = NewObject; return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiNsConvertToBuffer * * PARAMETERS: OriginalObject - Object to be converted * ReturnObject - Where the new converted object is returned * * RETURN: Status. AE_OK if conversion was successful. * * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer. * ******************************************************************************/ ACPI_STATUS AcpiNsConvertToBuffer ( ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject) { ACPI_OPERAND_OBJECT *NewObject; ACPI_STATUS Status; ACPI_OPERAND_OBJECT **Elements; UINT32 *DwordBuffer; UINT32 Count; UINT32 i; switch (OriginalObject->Common.Type) { case ACPI_TYPE_INTEGER: /* * Integer-to-Buffer conversion. * Convert the Integer to a packed-byte buffer. _MAT and other * objects need this sometimes, if a read has been performed on a * Field object that is less than or equal to the global integer * size (32 or 64 bits). */ Status = AcpiExConvertToBuffer (OriginalObject, &NewObject); if (ACPI_FAILURE (Status)) { return (Status); } break; case ACPI_TYPE_STRING: /* String-to-Buffer conversion. Simple data copy */ NewObject = AcpiUtCreateBufferObject (OriginalObject->String.Length); if (!NewObject) { return (AE_NO_MEMORY); } memcpy (NewObject->Buffer.Pointer, OriginalObject->String.Pointer, OriginalObject->String.Length); break; case ACPI_TYPE_PACKAGE: /* * This case is often seen for predefined names that must return a * Buffer object with multiple DWORD integers within. For example, * _FDE and _GTM. The Package can be converted to a Buffer. */ /* All elements of the Package must be integers */ Elements = OriginalObject->Package.Elements; Count = OriginalObject->Package.Count; for (i = 0; i < Count; i++) { if ((!*Elements) || ((*Elements)->Common.Type != ACPI_TYPE_INTEGER)) { return (AE_AML_OPERAND_TYPE); } Elements++; } /* Create the new buffer object to replace the Package */ NewObject = AcpiUtCreateBufferObject (ACPI_MUL_4 (Count)); if (!NewObject) { return (AE_NO_MEMORY); } /* Copy the package elements (integers) to the buffer as DWORDs */ Elements = OriginalObject->Package.Elements; DwordBuffer = ACPI_CAST_PTR (UINT32, NewObject->Buffer.Pointer); for (i = 0; i < Count; i++) { *DwordBuffer = (UINT32) (*Elements)->Integer.Value; DwordBuffer++; Elements++; } break; default: return (AE_AML_OPERAND_TYPE); } *ReturnObject = NewObject; return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiNsConvertToUnicode * * PARAMETERS: Scope - Namespace node for the method/object * OriginalObject - ASCII String Object to be converted * ReturnObject - Where the new converted object is returned * * RETURN: Status. AE_OK if conversion was successful. * * DESCRIPTION: Attempt to convert a String object to a Unicode string Buffer. * ******************************************************************************/ ACPI_STATUS AcpiNsConvertToUnicode ( ACPI_NAMESPACE_NODE *Scope, ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject) { ACPI_OPERAND_OBJECT *NewObject; char *AsciiString; UINT16 *UnicodeBuffer; UINT32 UnicodeLength; UINT32 i; if (!OriginalObject) { return (AE_OK); } /* If a Buffer was returned, it must be at least two bytes long */ if (OriginalObject->Common.Type == ACPI_TYPE_BUFFER) { if (OriginalObject->Buffer.Length < 2) { return (AE_AML_OPERAND_VALUE); } *ReturnObject = NULL; return (AE_OK); } /* * The original object is an ASCII string. Convert this string to * a unicode buffer. */ AsciiString = OriginalObject->String.Pointer; UnicodeLength = (OriginalObject->String.Length * 2) + 2; /* Create a new buffer object for the Unicode data */ NewObject = AcpiUtCreateBufferObject (UnicodeLength); if (!NewObject) { return (AE_NO_MEMORY); } UnicodeBuffer = ACPI_CAST_PTR (UINT16, NewObject->Buffer.Pointer); /* Convert ASCII to Unicode */ for (i = 0; i < OriginalObject->String.Length; i++) { UnicodeBuffer[i] = (UINT16) AsciiString[i]; } *ReturnObject = NewObject; return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiNsConvertToResource * * PARAMETERS: Scope - Namespace node for the method/object * OriginalObject - Object to be converted * ReturnObject - Where the new converted object is returned * * RETURN: Status. AE_OK if conversion was successful * * DESCRIPTION: Attempt to convert a Integer object to a ResourceTemplate * Buffer. * ******************************************************************************/ ACPI_STATUS AcpiNsConvertToResource ( ACPI_NAMESPACE_NODE *Scope, ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject) { ACPI_OPERAND_OBJECT *NewObject; UINT8 *Buffer; /* * We can fix the following cases for an expected resource template: * 1. No return value (interpreter slack mode is disabled) * 2. A "Return (Zero)" statement * 3. A "Return empty buffer" statement * * We will return a buffer containing a single EndTag * resource descriptor. */ if (OriginalObject) { switch (OriginalObject->Common.Type) { case ACPI_TYPE_INTEGER: /* We can only repair an Integer==0 */ if (OriginalObject->Integer.Value) { return (AE_AML_OPERAND_TYPE); } break; case ACPI_TYPE_BUFFER: if (OriginalObject->Buffer.Length) { /* Additional checks can be added in the future */ *ReturnObject = NULL; return (AE_OK); } break; case ACPI_TYPE_STRING: default: return (AE_AML_OPERAND_TYPE); } } /* Create the new buffer object for the resource descriptor */ NewObject = AcpiUtCreateBufferObject (2); if (!NewObject) { return (AE_NO_MEMORY); } Buffer = ACPI_CAST_PTR (UINT8, NewObject->Buffer.Pointer); /* Initialize the Buffer with a single EndTag descriptor */ Buffer[0] = (ACPI_RESOURCE_NAME_END_TAG | ASL_RDESC_END_TAG_SIZE); Buffer[1] = 0x00; *ReturnObject = NewObject; return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiNsConvertToReference * * PARAMETERS: Scope - Namespace node for the method/object * OriginalObject - Object to be converted * ReturnObject - Where the new converted object is returned * * RETURN: Status. AE_OK if conversion was successful * * DESCRIPTION: Attempt to convert a Integer object to a ObjectReference. * Buffer. * ******************************************************************************/ ACPI_STATUS AcpiNsConvertToReference ( ACPI_NAMESPACE_NODE *Scope, ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject) { ACPI_OPERAND_OBJECT *NewObject = NULL; ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_GENERIC_STATE ScopeInfo; char *Name; ACPI_FUNCTION_NAME (NsConvertToReference); /* Convert path into internal presentation */ Status = AcpiNsInternalizeName (OriginalObject->String.Pointer, &Name); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Find the namespace node */ ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Scope); Status = AcpiNsLookup (&ScopeInfo, Name, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); if (ACPI_FAILURE (Status)) { /* Check if we are resolving a named reference within a package */ ACPI_ERROR_NAMESPACE (&ScopeInfo, OriginalObject->String.Pointer, Status); goto ErrorExit; } /* Create and init a new internal ACPI object */ NewObject = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); if (!NewObject) { Status = AE_NO_MEMORY; goto ErrorExit; } NewObject->Reference.Node = Node; NewObject->Reference.Object = Node->Object; NewObject->Reference.Class = ACPI_REFCLASS_NAME; /* * Increase reference of the object if needed (the object is likely a * null for device nodes). */ AcpiUtAddReference (Node->Object); ErrorExit: ACPI_FREE (Name); *ReturnObject = NewObject; return (Status); }