1 /******************************************************************************
3 * Module Name: utobject - ACPI object create/delete/size/cache routines
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2015, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************/
117 #include "accommon.h"
118 #include "acnamesp.h"
121 #define _COMPONENT ACPI_UTILITIES
122 ACPI_MODULE_NAME ("utobject")
124 /* Local prototypes */
127 AcpiUtGetSimpleObjectSize (
128 ACPI_OPERAND_OBJECT *Obj,
129 ACPI_SIZE *ObjLength);
132 AcpiUtGetPackageObjectSize (
133 ACPI_OPERAND_OBJECT *Obj,
134 ACPI_SIZE *ObjLength);
137 AcpiUtGetElementLength (
139 ACPI_OPERAND_OBJECT *SourceObject,
140 ACPI_GENERIC_STATE *State,
144 /*******************************************************************************
146 * FUNCTION: AcpiUtCreateInternalObjectDbg
148 * PARAMETERS: ModuleName - Source file name of caller
149 * LineNumber - Line number of caller
150 * ComponentId - Component type of caller
151 * Type - ACPI Type of the new object
153 * RETURN: A new internal object, null on failure
155 * DESCRIPTION: Create and initialize a new internal object.
157 * NOTE: We always allocate the worst-case object descriptor because
158 * these objects are cached, and we want them to be
159 * one-size-satisifies-any-request. This in itself may not be
160 * the most memory efficient, but the efficiency of the object
161 * cache should more than make up for this!
163 ******************************************************************************/
165 ACPI_OPERAND_OBJECT *
166 AcpiUtCreateInternalObjectDbg (
167 const char *ModuleName,
170 ACPI_OBJECT_TYPE Type)
172 ACPI_OPERAND_OBJECT *Object;
173 ACPI_OPERAND_OBJECT *SecondObject;
176 ACPI_FUNCTION_TRACE_STR (UtCreateInternalObjectDbg,
177 AcpiUtGetTypeName (Type));
180 /* Allocate the raw object descriptor */
182 Object = AcpiUtAllocateObjectDescDbg (ModuleName, LineNumber, ComponentId);
190 case ACPI_TYPE_REGION:
191 case ACPI_TYPE_BUFFER_FIELD:
192 case ACPI_TYPE_LOCAL_BANK_FIELD:
194 /* These types require a secondary object */
196 SecondObject = AcpiUtAllocateObjectDescDbg (ModuleName,
197 LineNumber, ComponentId);
200 AcpiUtDeleteObjectDesc (Object);
204 SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
205 SecondObject->Common.ReferenceCount = 1;
207 /* Link the second object to the first */
209 Object->Common.NextObject = SecondObject;
214 /* All others have no secondary object */
218 /* Save the object type in the object descriptor */
220 Object->Common.Type = (UINT8) Type;
222 /* Init the reference count */
224 Object->Common.ReferenceCount = 1;
226 /* Any per-type initialization should go here */
232 /*******************************************************************************
234 * FUNCTION: AcpiUtCreatePackageObject
236 * PARAMETERS: Count - Number of package elements
238 * RETURN: Pointer to a new Package object, null on failure
240 * DESCRIPTION: Create a fully initialized package object
242 ******************************************************************************/
244 ACPI_OPERAND_OBJECT *
245 AcpiUtCreatePackageObject (
248 ACPI_OPERAND_OBJECT *PackageDesc;
249 ACPI_OPERAND_OBJECT **PackageElements;
252 ACPI_FUNCTION_TRACE_U32 (UtCreatePackageObject, Count);
255 /* Create a new Package object */
257 PackageDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
264 * Create the element array. Count+1 allows the array to be null
267 PackageElements = ACPI_ALLOCATE_ZEROED (
268 ((ACPI_SIZE) Count + 1) * sizeof (void *));
269 if (!PackageElements)
271 ACPI_FREE (PackageDesc);
275 PackageDesc->Package.Count = Count;
276 PackageDesc->Package.Elements = PackageElements;
277 return_PTR (PackageDesc);
281 /*******************************************************************************
283 * FUNCTION: AcpiUtCreateIntegerObject
285 * PARAMETERS: InitialValue - Initial value for the integer
287 * RETURN: Pointer to a new Integer object, null on failure
289 * DESCRIPTION: Create an initialized integer object
291 ******************************************************************************/
293 ACPI_OPERAND_OBJECT *
294 AcpiUtCreateIntegerObject (
297 ACPI_OPERAND_OBJECT *IntegerDesc;
300 ACPI_FUNCTION_TRACE (UtCreateIntegerObject);
303 /* Create and initialize a new integer object */
305 IntegerDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
311 IntegerDesc->Integer.Value = InitialValue;
312 return_PTR (IntegerDesc);
316 /*******************************************************************************
318 * FUNCTION: AcpiUtCreateBufferObject
320 * PARAMETERS: BufferSize - Size of buffer to be created
322 * RETURN: Pointer to a new Buffer object, null on failure
324 * DESCRIPTION: Create a fully initialized buffer object
326 ******************************************************************************/
328 ACPI_OPERAND_OBJECT *
329 AcpiUtCreateBufferObject (
330 ACPI_SIZE BufferSize)
332 ACPI_OPERAND_OBJECT *BufferDesc;
333 UINT8 *Buffer = NULL;
336 ACPI_FUNCTION_TRACE_U32 (UtCreateBufferObject, BufferSize);
339 /* Create a new Buffer object */
341 BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
347 /* Create an actual buffer only if size > 0 */
351 /* Allocate the actual buffer */
353 Buffer = ACPI_ALLOCATE_ZEROED (BufferSize);
356 ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
357 (UINT32) BufferSize));
358 AcpiUtRemoveReference (BufferDesc);
363 /* Complete buffer object initialization */
365 BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
366 BufferDesc->Buffer.Pointer = Buffer;
367 BufferDesc->Buffer.Length = (UINT32) BufferSize;
369 /* Return the new buffer descriptor */
371 return_PTR (BufferDesc);
375 /*******************************************************************************
377 * FUNCTION: AcpiUtCreateStringObject
379 * PARAMETERS: StringSize - Size of string to be created. Does not
380 * include NULL terminator, this is added
383 * RETURN: Pointer to a new String object
385 * DESCRIPTION: Create a fully initialized string object
387 ******************************************************************************/
389 ACPI_OPERAND_OBJECT *
390 AcpiUtCreateStringObject (
391 ACPI_SIZE StringSize)
393 ACPI_OPERAND_OBJECT *StringDesc;
397 ACPI_FUNCTION_TRACE_U32 (UtCreateStringObject, StringSize);
400 /* Create a new String object */
402 StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
409 * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
410 * NOTE: Zero-length strings are NULL terminated
412 String = ACPI_ALLOCATE_ZEROED (StringSize + 1);
415 ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
416 (UINT32) StringSize));
417 AcpiUtRemoveReference (StringDesc);
421 /* Complete string object initialization */
423 StringDesc->String.Pointer = String;
424 StringDesc->String.Length = (UINT32) StringSize;
426 /* Return the new string descriptor */
428 return_PTR (StringDesc);
432 /*******************************************************************************
434 * FUNCTION: AcpiUtValidInternalObject
436 * PARAMETERS: Object - Object to be validated
438 * RETURN: TRUE if object is valid, FALSE otherwise
440 * DESCRIPTION: Validate a pointer to be of type ACPI_OPERAND_OBJECT
442 ******************************************************************************/
445 AcpiUtValidInternalObject (
449 ACPI_FUNCTION_NAME (UtValidInternalObject);
452 /* Check for a null pointer */
456 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
460 /* Check the descriptor type field */
462 switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
464 case ACPI_DESC_TYPE_OPERAND:
466 /* The object appears to be a valid ACPI_OPERAND_OBJECT */
472 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
473 "%p is not an ACPI operand obj [%s]\n",
474 Object, AcpiUtGetDescriptorName (Object)));
482 /*******************************************************************************
484 * FUNCTION: AcpiUtAllocateObjectDescDbg
486 * PARAMETERS: ModuleName - Caller's module name (for error output)
487 * LineNumber - Caller's line number (for error output)
488 * ComponentId - Caller's component ID (for error output)
490 * RETURN: Pointer to newly allocated object descriptor. Null on error
492 * DESCRIPTION: Allocate a new object descriptor. Gracefully handle
495 ******************************************************************************/
498 AcpiUtAllocateObjectDescDbg (
499 const char *ModuleName,
503 ACPI_OPERAND_OBJECT *Object;
506 ACPI_FUNCTION_TRACE (UtAllocateObjectDescDbg);
509 Object = AcpiOsAcquireObject (AcpiGbl_OperandCache);
512 ACPI_ERROR ((ModuleName, LineNumber,
513 "Could not allocate an object descriptor"));
518 /* Mark the descriptor type */
520 ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
522 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
523 Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
529 /*******************************************************************************
531 * FUNCTION: AcpiUtDeleteObjectDesc
533 * PARAMETERS: Object - An Acpi internal object to be deleted
537 * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
539 ******************************************************************************/
542 AcpiUtDeleteObjectDesc (
543 ACPI_OPERAND_OBJECT *Object)
545 ACPI_FUNCTION_TRACE_PTR (UtDeleteObjectDesc, Object);
548 /* Object must be of type ACPI_OPERAND_OBJECT */
550 if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
552 ACPI_ERROR ((AE_INFO,
553 "%p is not an ACPI Operand object [%s]", Object,
554 AcpiUtGetDescriptorName (Object)));
558 (void) AcpiOsReleaseObject (AcpiGbl_OperandCache, Object);
563 /*******************************************************************************
565 * FUNCTION: AcpiUtGetSimpleObjectSize
567 * PARAMETERS: InternalObject - An ACPI operand object
568 * ObjLength - Where the length is returned
572 * DESCRIPTION: This function is called to determine the space required to
573 * contain a simple object for return to an external user.
575 * The length includes the object structure plus any additional
578 ******************************************************************************/
581 AcpiUtGetSimpleObjectSize (
582 ACPI_OPERAND_OBJECT *InternalObject,
583 ACPI_SIZE *ObjLength)
587 ACPI_STATUS Status = AE_OK;
590 ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);
593 /* Start with the length of the (external) Acpi object */
595 Length = sizeof (ACPI_OBJECT);
597 /* A NULL object is allowed, can be a legal uninitialized package element */
602 * Object is NULL, just return the length of ACPI_OBJECT
603 * (A NULL ACPI_OBJECT is an object of all zeroes.)
605 *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
606 return_ACPI_STATUS (AE_OK);
609 /* A Namespace Node should never appear here */
611 if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
613 /* A namespace node should never get here */
615 return_ACPI_STATUS (AE_AML_INTERNAL);
619 * The final length depends on the object type
620 * Strings and Buffers are packed right up against the parent object and
621 * must be accessed bytewise or there may be alignment problems on
624 switch (InternalObject->Common.Type)
626 case ACPI_TYPE_STRING:
628 Length += (ACPI_SIZE) InternalObject->String.Length + 1;
631 case ACPI_TYPE_BUFFER:
633 Length += (ACPI_SIZE) InternalObject->Buffer.Length;
636 case ACPI_TYPE_INTEGER:
637 case ACPI_TYPE_PROCESSOR:
638 case ACPI_TYPE_POWER:
640 /* No extra data for these types */
644 case ACPI_TYPE_LOCAL_REFERENCE:
646 switch (InternalObject->Reference.Class)
648 case ACPI_REFCLASS_NAME:
650 * Get the actual length of the full pathname to this object.
651 * The reference will be converted to the pathname to the object
653 Size = AcpiNsGetPathnameLength (InternalObject->Reference.Node);
656 return_ACPI_STATUS (AE_BAD_PARAMETER);
659 Length += ACPI_ROUND_UP_TO_NATIVE_WORD (Size);
664 * No other reference opcodes are supported.
665 * Notably, Locals and Args are not supported, but this may be
666 * required eventually.
668 ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
669 "unsupported Reference Class [%s] 0x%X in object %p",
670 AcpiUtGetReferenceName (InternalObject),
671 InternalObject->Reference.Class, InternalObject));
679 ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
680 "unsupported type [%s] 0x%X in object %p",
681 AcpiUtGetObjectTypeName (InternalObject),
682 InternalObject->Common.Type, InternalObject));
688 * Account for the space required by the object rounded up to the next
689 * multiple of the machine word size. This keeps each object aligned
690 * on a machine word boundary. (preventing alignment faults on some
693 *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
694 return_ACPI_STATUS (Status);
698 /*******************************************************************************
700 * FUNCTION: AcpiUtGetElementLength
702 * PARAMETERS: ACPI_PKG_CALLBACK
706 * DESCRIPTION: Get the length of one package element.
708 ******************************************************************************/
711 AcpiUtGetElementLength (
713 ACPI_OPERAND_OBJECT *SourceObject,
714 ACPI_GENERIC_STATE *State,
717 ACPI_STATUS Status = AE_OK;
718 ACPI_PKG_INFO *Info = (ACPI_PKG_INFO *) Context;
719 ACPI_SIZE ObjectSpace;
724 case ACPI_COPY_TYPE_SIMPLE:
726 * Simple object - just get the size (Null object/entry is handled
727 * here also) and sum it into the running package length
729 Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
730 if (ACPI_FAILURE (Status))
735 Info->Length += ObjectSpace;
738 case ACPI_COPY_TYPE_PACKAGE:
740 /* Package object - nothing much to do here, let the walk handle it */
743 State->Pkg.ThisTargetObj = NULL;
748 /* No other types allowed */
750 return (AE_BAD_PARAMETER);
757 /*******************************************************************************
759 * FUNCTION: AcpiUtGetPackageObjectSize
761 * PARAMETERS: InternalObject - An ACPI internal object
762 * ObjLength - Where the length is returned
766 * DESCRIPTION: This function is called to determine the space required to
767 * contain a package object for return to an external user.
769 * This is moderately complex since a package contains other
770 * objects including packages.
772 ******************************************************************************/
775 AcpiUtGetPackageObjectSize (
776 ACPI_OPERAND_OBJECT *InternalObject,
777 ACPI_SIZE *ObjLength)
783 ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);
787 Info.ObjectSpace = 0;
788 Info.NumPackages = 1;
790 Status = AcpiUtWalkPackageTree (InternalObject, NULL,
791 AcpiUtGetElementLength, &Info);
792 if (ACPI_FAILURE (Status))
794 return_ACPI_STATUS (Status);
798 * We have handled all of the objects in all levels of the package.
799 * just add the length of the package objects themselves.
800 * Round up to the next machine word.
802 Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT)) *
803 (ACPI_SIZE) Info.NumPackages;
805 /* Return the total package length */
807 *ObjLength = Info.Length;
808 return_ACPI_STATUS (Status);
812 /*******************************************************************************
814 * FUNCTION: AcpiUtGetObjectSize
816 * PARAMETERS: InternalObject - An ACPI internal object
817 * ObjLength - Where the length will be returned
821 * DESCRIPTION: This function is called to determine the space required to
822 * contain an object for return to an API user.
824 ******************************************************************************/
827 AcpiUtGetObjectSize (
828 ACPI_OPERAND_OBJECT *InternalObject,
829 ACPI_SIZE *ObjLength)
834 ACPI_FUNCTION_ENTRY ();
837 if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_OPERAND) &&
838 (InternalObject->Common.Type == ACPI_TYPE_PACKAGE))
840 Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
844 Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);