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Diffstat (limited to 'sys/contrib/dev/acpica/namespace/nsrepair.c')
| -rw-r--r-- | sys/contrib/dev/acpica/namespace/nsrepair.c | 876 |
1 files changed, 876 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/namespace/nsrepair.c b/sys/contrib/dev/acpica/namespace/nsrepair.c new file mode 100644 index 0000000..b2191a7 --- /dev/null +++ b/sys/contrib/dev/acpica/namespace/nsrepair.c @@ -0,0 +1,876 @@ +/****************************************************************************** + * + * Module Name: nsrepair - Repair for objects returned by predefined methods + * + *****************************************************************************/ + +/****************************************************************************** + * + * 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 __NSREPAIR_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acnamesp.h> +#include <contrib/dev/acpica/include/acinterp.h> +#include <contrib/dev/acpica/include/acpredef.h> + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nsrepair") + + +/******************************************************************************* + * + * This module attempts to repair or convert objects returned by the + * predefined methods to an object type that is expected, as per the ACPI + * specification. The need for this code is dictated by the many machines that + * return incorrect types for the standard predefined methods. Performing these + * conversions here, in one place, eliminates the need for individual ACPI + * device drivers to do the same. Note: Most of these conversions are different + * than the internal object conversion routines used for implicit object + * conversion. + * + * The following conversions can be performed as necessary: + * + * Integer -> String + * Integer -> Buffer + * String -> Integer + * String -> Buffer + * Buffer -> Integer + * Buffer -> String + * Buffer -> Package of Integers + * Package -> Package of one Package + * + * Additional possible repairs: + * + * Optional/unnecessary NULL package elements removed + * Required package elements that are NULL replaced by Integer/String/Buffer + * Incorrect standalone package wrapped with required outer package + * + ******************************************************************************/ + + +/* Local prototypes */ + +static ACPI_STATUS +AcpiNsConvertToInteger ( + ACPI_OPERAND_OBJECT *OriginalObject, + ACPI_OPERAND_OBJECT **ReturnObject); + +static ACPI_STATUS +AcpiNsConvertToString ( + ACPI_OPERAND_OBJECT *OriginalObject, + ACPI_OPERAND_OBJECT **ReturnObject); + +static ACPI_STATUS +AcpiNsConvertToBuffer ( + ACPI_OPERAND_OBJECT *OriginalObject, + ACPI_OPERAND_OBJECT **ReturnObject); + +static ACPI_STATUS +AcpiNsConvertToPackage ( + ACPI_OPERAND_OBJECT *OriginalObject, + ACPI_OPERAND_OBJECT **ReturnObject); + + +/******************************************************************************* + * + * FUNCTION: AcpiNsRepairObject + * + * PARAMETERS: Data - Pointer to validation data structure + * ExpectedBtypes - Object types expected + * PackageIndex - Index of object within parent package (if + * applicable - ACPI_NOT_PACKAGE_ELEMENT + * otherwise) + * ReturnObjectPtr - Pointer to the object returned from the + * evaluation of a method or object + * + * RETURN: Status. AE_OK if repair was successful. + * + * DESCRIPTION: Attempt to repair/convert a return object of a type that was + * not expected. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsRepairObject ( + ACPI_PREDEFINED_DATA *Data, + UINT32 ExpectedBtypes, + UINT32 PackageIndex, + ACPI_OPERAND_OBJECT **ReturnObjectPtr) +{ + ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; + ACPI_OPERAND_OBJECT *NewObject; + ACPI_STATUS Status; + + + ACPI_FUNCTION_NAME (NsRepairObject); + + + /* + * At this point, we know that the type of the returned object was not + * one of the expected types for this predefined name. Attempt to + * repair the object by converting it to one of the expected object + * types for this predefined name. + */ + if (ExpectedBtypes & ACPI_RTYPE_INTEGER) + { + Status = AcpiNsConvertToInteger (ReturnObject, &NewObject); + if (ACPI_SUCCESS (Status)) + { + goto ObjectRepaired; + } + } + if (ExpectedBtypes & ACPI_RTYPE_STRING) + { + Status = AcpiNsConvertToString (ReturnObject, &NewObject); + if (ACPI_SUCCESS (Status)) + { + goto ObjectRepaired; + } + } + if (ExpectedBtypes & ACPI_RTYPE_BUFFER) + { + Status = AcpiNsConvertToBuffer (ReturnObject, &NewObject); + if (ACPI_SUCCESS (Status)) + { + goto ObjectRepaired; + } + } + if (ExpectedBtypes & ACPI_RTYPE_PACKAGE) + { + Status = AcpiNsConvertToPackage (ReturnObject, &NewObject); + if (ACPI_SUCCESS (Status)) + { + goto ObjectRepaired; + } + } + + /* We cannot repair this object */ + + return (AE_AML_OPERAND_TYPE); + + +ObjectRepaired: + + /* Object was successfully repaired */ + + /* + * If the original object is a package element, we need to: + * 1. Set the reference count of the new object to match the + * reference count of the old object. + * 2. Decrement the reference count of the original object. + */ + if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) + { + NewObject->Common.ReferenceCount = + ReturnObject->Common.ReferenceCount; + + if (ReturnObject->Common.ReferenceCount > 1) + { + ReturnObject->Common.ReferenceCount--; + } + + ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, + "%s: Converted %s to expected %s at index %u\n", + Data->Pathname, AcpiUtGetObjectTypeName (ReturnObject), + AcpiUtGetObjectTypeName (NewObject), PackageIndex)); + } + else + { + ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, + "%s: Converted %s to expected %s\n", + Data->Pathname, AcpiUtGetObjectTypeName (ReturnObject), + AcpiUtGetObjectTypeName (NewObject))); + } + + /* Delete old object, install the new return object */ + + AcpiUtRemoveReference (ReturnObject); + *ReturnObjectPtr = NewObject; + Data->Flags |= ACPI_OBJECT_REPAIRED; + return (AE_OK); +} + + +/******************************************************************************* + * + * 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. + * + ******************************************************************************/ + +static 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, + ACPI_ANY_BASE, &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. + * + ******************************************************************************/ + +static 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. + */ + ACPI_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. + * + ******************************************************************************/ + +static 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); + } + + ACPI_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: AcpiNsConvertToPackage + * + * 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 Buffer object to a Package. Each byte of + * the buffer is converted to a single integer package element. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiNsConvertToPackage ( + ACPI_OPERAND_OBJECT *OriginalObject, + ACPI_OPERAND_OBJECT **ReturnObject) +{ + ACPI_OPERAND_OBJECT *NewObject; + ACPI_OPERAND_OBJECT **Elements; + UINT32 Length; + UINT8 *Buffer; + + + switch (OriginalObject->Common.Type) + { + case ACPI_TYPE_BUFFER: + + /* Buffer-to-Package conversion */ + + Length = OriginalObject->Buffer.Length; + NewObject = AcpiUtCreatePackageObject (Length); + if (!NewObject) + { + return (AE_NO_MEMORY); + } + + /* Convert each buffer byte to an integer package element */ + + Elements = NewObject->Package.Elements; + Buffer = OriginalObject->Buffer.Pointer; + + while (Length--) + { + *Elements = AcpiUtCreateIntegerObject ((UINT64) *Buffer); + if (!*Elements) + { + AcpiUtRemoveReference (NewObject); + return (AE_NO_MEMORY); + } + Elements++; + Buffer++; + } + break; + + default: + return (AE_AML_OPERAND_TYPE); + } + + *ReturnObject = NewObject; + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsRepairNullElement + * + * PARAMETERS: Data - Pointer to validation data structure + * ExpectedBtypes - Object types expected + * PackageIndex - Index of object within parent package (if + * applicable - ACPI_NOT_PACKAGE_ELEMENT + * otherwise) + * ReturnObjectPtr - Pointer to the object returned from the + * evaluation of a method or object + * + * RETURN: Status. AE_OK if repair was successful. + * + * DESCRIPTION: Attempt to repair a NULL element of a returned Package object. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsRepairNullElement ( + ACPI_PREDEFINED_DATA *Data, + UINT32 ExpectedBtypes, + UINT32 PackageIndex, + ACPI_OPERAND_OBJECT **ReturnObjectPtr) +{ + ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; + ACPI_OPERAND_OBJECT *NewObject; + + + ACPI_FUNCTION_NAME (NsRepairNullElement); + + + /* No repair needed if return object is non-NULL */ + + if (ReturnObject) + { + return (AE_OK); + } + + /* + * Attempt to repair a NULL element of a Package object. This applies to + * predefined names that return a fixed-length package and each element + * is required. It does not apply to variable-length packages where NULL + * elements are allowed, especially at the end of the package. + */ + if (ExpectedBtypes & ACPI_RTYPE_INTEGER) + { + /* Need an Integer - create a zero-value integer */ + + NewObject = AcpiUtCreateIntegerObject (0); + } + else if (ExpectedBtypes & ACPI_RTYPE_STRING) + { + /* Need a String - create a NULL string */ + + NewObject = AcpiUtCreateStringObject (0); + } + else if (ExpectedBtypes & ACPI_RTYPE_BUFFER) + { + /* Need a Buffer - create a zero-length buffer */ + + NewObject = AcpiUtCreateBufferObject (0); + } + else + { + /* Error for all other expected types */ + + return (AE_AML_OPERAND_TYPE); + } + + if (!NewObject) + { + return (AE_NO_MEMORY); + } + + /* Set the reference count according to the parent Package object */ + + NewObject->Common.ReferenceCount = Data->ParentPackage->Common.ReferenceCount; + + ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, + "%s: Converted NULL package element to expected %s at index %u\n", + Data->Pathname, AcpiUtGetObjectTypeName (NewObject), PackageIndex)); + + *ReturnObjectPtr = NewObject; + Data->Flags |= ACPI_OBJECT_REPAIRED; + return (AE_OK); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiNsRemoveNullElements + * + * PARAMETERS: Data - Pointer to validation data structure + * PackageType - An AcpiReturnPackageTypes value + * ObjDesc - A Package object + * + * RETURN: None. + * + * DESCRIPTION: Remove all NULL package elements from packages that contain + * a variable number of sub-packages. For these types of + * packages, NULL elements can be safely removed. + * + *****************************************************************************/ + +void +AcpiNsRemoveNullElements ( + ACPI_PREDEFINED_DATA *Data, + UINT8 PackageType, + ACPI_OPERAND_OBJECT *ObjDesc) +{ + ACPI_OPERAND_OBJECT **Source; + ACPI_OPERAND_OBJECT **Dest; + UINT32 Count; + UINT32 NewCount; + UINT32 i; + + + ACPI_FUNCTION_NAME (NsRemoveNullElements); + + + /* + * PTYPE1 packages contain no subpackages. + * PTYPE2 packages contain a variable number of sub-packages. We can + * safely remove all NULL elements from the PTYPE2 packages. + */ + switch (PackageType) + { + case ACPI_PTYPE1_FIXED: + case ACPI_PTYPE1_VAR: + case ACPI_PTYPE1_OPTION: + return; + + case ACPI_PTYPE2: + case ACPI_PTYPE2_COUNT: + case ACPI_PTYPE2_PKG_COUNT: + case ACPI_PTYPE2_FIXED: + case ACPI_PTYPE2_MIN: + case ACPI_PTYPE2_REV_FIXED: + break; + + default: + return; + } + + Count = ObjDesc->Package.Count; + NewCount = Count; + + Source = ObjDesc->Package.Elements; + Dest = Source; + + /* Examine all elements of the package object, remove nulls */ + + for (i = 0; i < Count; i++) + { + if (!*Source) + { + NewCount--; + } + else + { + *Dest = *Source; + Dest++; + } + Source++; + } + + /* Update parent package if any null elements were removed */ + + if (NewCount < Count) + { + ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, + "%s: Found and removed %u NULL elements\n", + Data->Pathname, (Count - NewCount))); + + /* NULL terminate list and update the package count */ + + *Dest = NULL; + ObjDesc->Package.Count = NewCount; + } +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsRepairPackageList + * + * PARAMETERS: Data - Pointer to validation data structure + * ObjDescPtr - Pointer to the object to repair. The new + * package object is returned here, + * overwriting the old object. + * + * RETURN: Status, new object in *ObjDescPtr + * + * DESCRIPTION: Repair a common problem with objects that are defined to return + * a variable-length Package of Packages. If the variable-length + * is one, some BIOS code mistakenly simply declares a single + * Package instead of a Package with one sub-Package. This + * function attempts to repair this error by wrapping a Package + * object around the original Package, creating the correct + * Package with one sub-Package. + * + * Names that can be repaired in this manner include: + * _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, TSS + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsRepairPackageList ( + ACPI_PREDEFINED_DATA *Data, + ACPI_OPERAND_OBJECT **ObjDescPtr) +{ + ACPI_OPERAND_OBJECT *PkgObjDesc; + + + ACPI_FUNCTION_NAME (NsRepairPackageList); + + + /* + * Create the new outer package and populate it. The new package will + * have a single element, the lone subpackage. + */ + PkgObjDesc = AcpiUtCreatePackageObject (1); + if (!PkgObjDesc) + { + return (AE_NO_MEMORY); + } + + PkgObjDesc->Package.Elements[0] = *ObjDescPtr; + + /* Return the new object in the object pointer */ + + *ObjDescPtr = PkgObjDesc; + Data->Flags |= ACPI_OBJECT_REPAIRED; + + ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, + "%s: Repaired incorrectly formed Package\n", Data->Pathname)); + + return (AE_OK); +} |
