1 /******************************************************************************
3 * Module Name: utobject - ACPI object create/delete/size/cache routines
6 *****************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
117 #define __UTOBJECT_C__
120 #include "acnamesp.h"
124 #define _COMPONENT ACPI_UTILITIES
125 ACPI_MODULE_NAME ("utobject")
128 /*******************************************************************************
130 * FUNCTION: AcpiUtCreateInternalObjectDbg
132 * PARAMETERS: ModuleName - Source file name of caller
133 * LineNumber - Line number of caller
134 * ComponentId - Component type of caller
135 * Type - ACPI Type of the new object
137 * RETURN: Object - The new object. Null on failure
139 * DESCRIPTION: Create and initialize a new internal object.
141 * NOTE: We always allocate the worst-case object descriptor because
142 * these objects are cached, and we want them to be
143 * one-size-satisifies-any-request. This in itself may not be
144 * the most memory efficient, but the efficiency of the object
145 * cache should more than make up for this!
147 ******************************************************************************/
149 ACPI_OPERAND_OBJECT *
150 AcpiUtCreateInternalObjectDbg (
154 ACPI_OBJECT_TYPE Type)
156 ACPI_OPERAND_OBJECT *Object;
157 ACPI_OPERAND_OBJECT *SecondObject;
160 ACPI_FUNCTION_TRACE_STR ("UtCreateInternalObjectDbg", AcpiUtGetTypeName (Type));
163 /* Allocate the raw object descriptor */
165 Object = AcpiUtAllocateObjectDescDbg (ModuleName, LineNumber, ComponentId);
173 case ACPI_TYPE_REGION:
174 case ACPI_TYPE_BUFFER_FIELD:
176 /* These types require a secondary object */
178 SecondObject = AcpiUtAllocateObjectDescDbg (ModuleName, LineNumber, ComponentId);
181 AcpiUtDeleteObjectDesc (Object);
185 SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
186 SecondObject->Common.ReferenceCount = 1;
188 /* Link the second object to the first */
190 Object->Common.NextObject = SecondObject;
194 /* All others have no secondary object */
198 /* Save the object type in the object descriptor */
200 Object->Common.Type = (UINT8) Type;
202 /* Init the reference count */
204 Object->Common.ReferenceCount = 1;
206 /* Any per-type initialization should go here */
212 /*******************************************************************************
214 * FUNCTION: AcpiUtCreateBufferObject
216 * PARAMETERS: BufferSize - Size of buffer to be created
218 * RETURN: Pointer to a new Buffer object
220 * DESCRIPTION: Create a fully initialized buffer object
222 ******************************************************************************/
224 ACPI_OPERAND_OBJECT *
225 AcpiUtCreateBufferObject (
226 ACPI_SIZE BufferSize)
228 ACPI_OPERAND_OBJECT *BufferDesc;
229 UINT8 *Buffer = NULL;
232 ACPI_FUNCTION_TRACE_U32 ("UtCreateBufferObject", BufferSize);
235 /* Create a new Buffer object */
237 BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
243 /* Create an actual buffer only if size > 0 */
247 /* Allocate the actual buffer */
249 Buffer = ACPI_MEM_CALLOCATE (BufferSize);
252 ACPI_REPORT_ERROR (("CreateBuffer: could not allocate size %X\n",
253 (UINT32) BufferSize));
254 AcpiUtRemoveReference (BufferDesc);
259 /* Complete buffer object initialization */
261 BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
262 BufferDesc->Buffer.Pointer = Buffer;
263 BufferDesc->Buffer.Length = (UINT32) BufferSize;
265 /* Return the new buffer descriptor */
267 return_PTR (BufferDesc);
271 /*******************************************************************************
273 * FUNCTION: AcpiUtCreateStringObject
275 * PARAMETERS: StringSize - Size of string to be created. Does not
276 * include NULL terminator, this is added
279 * RETURN: Pointer to a new String object
281 * DESCRIPTION: Create a fully initialized string object
283 ******************************************************************************/
285 ACPI_OPERAND_OBJECT *
286 AcpiUtCreateStringObject (
287 ACPI_SIZE StringSize)
289 ACPI_OPERAND_OBJECT *StringDesc;
293 ACPI_FUNCTION_TRACE_U32 ("UtCreateStringObject", StringSize);
296 /* Create a new String object */
298 StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
305 * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
306 * NOTE: Zero-length strings are NULL terminated
308 String = ACPI_MEM_CALLOCATE (StringSize + 1);
311 ACPI_REPORT_ERROR (("CreateString: could not allocate size %X\n",
312 (UINT32) StringSize));
313 AcpiUtRemoveReference (StringDesc);
317 /* Complete string object initialization */
319 StringDesc->String.Pointer = String;
320 StringDesc->String.Length = (UINT32) StringSize;
322 /* Return the new string descriptor */
324 return_PTR (StringDesc);
328 /*******************************************************************************
330 * FUNCTION: AcpiUtValidInternalObject
332 * PARAMETERS: Object - Object to be validated
334 * RETURN: Validate a pointer to be an ACPI_OPERAND_OBJECT
336 ******************************************************************************/
339 AcpiUtValidInternalObject (
343 ACPI_FUNCTION_NAME ("UtValidInternalObject");
346 /* Check for a null pointer */
350 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Null Object Ptr\n"));
354 /* Check the descriptor type field */
356 switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
358 case ACPI_DESC_TYPE_OPERAND:
360 /* The object appears to be a valid ACPI_OPERAND_OBJECT */
365 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
366 "%p is not not an ACPI operand obj [%s]\n",
367 Object, AcpiUtGetDescriptorName (Object)));
375 /*******************************************************************************
377 * FUNCTION: AcpiUtAllocateObjectDescDbg
379 * PARAMETERS: ModuleName - Caller's module name (for error output)
380 * LineNumber - Caller's line number (for error output)
381 * ComponentId - Caller's component ID (for error output)
383 * RETURN: Pointer to newly allocated object descriptor. Null on error
385 * DESCRIPTION: Allocate a new object descriptor. Gracefully handle
388 ******************************************************************************/
391 AcpiUtAllocateObjectDescDbg (
396 ACPI_OPERAND_OBJECT *Object;
399 ACPI_FUNCTION_TRACE ("UtAllocateObjectDescDbg");
402 Object = AcpiUtAcquireFromCache (ACPI_MEM_LIST_OPERAND);
405 _ACPI_REPORT_ERROR (ModuleName, LineNumber, ComponentId,
406 ("Could not allocate an object descriptor\n"));
411 /* Mark the descriptor type */
413 ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
415 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
416 Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
422 /*******************************************************************************
424 * FUNCTION: AcpiUtDeleteObjectDesc
426 * PARAMETERS: Object - An Acpi internal object to be deleted
430 * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
432 ******************************************************************************/
435 AcpiUtDeleteObjectDesc (
436 ACPI_OPERAND_OBJECT *Object)
438 ACPI_FUNCTION_TRACE_PTR ("UtDeleteObjectDesc", Object);
441 /* Object must be an ACPI_OPERAND_OBJECT */
443 if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
445 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
446 "%p is not an ACPI Operand object [%s]\n", Object,
447 AcpiUtGetDescriptorName (Object)));
451 AcpiUtReleaseToCache (ACPI_MEM_LIST_OPERAND, Object);
457 /*******************************************************************************
459 * FUNCTION: AcpiUtDeleteObjectCache
465 * DESCRIPTION: Purge the global state object cache. Used during subsystem
468 ******************************************************************************/
471 AcpiUtDeleteObjectCache (
474 ACPI_FUNCTION_TRACE ("UtDeleteObjectCache");
477 AcpiUtDeleteGenericCache (ACPI_MEM_LIST_OPERAND);
482 /*******************************************************************************
484 * FUNCTION: AcpiUtGetSimpleObjectSize
486 * PARAMETERS: *InternalObject - Pointer to the object we are examining
487 * *ObjLength - Where the length is returned
491 * DESCRIPTION: This function is called to determine the space required to
492 * contain a simple object for return to an external user.
494 * The length includes the object structure plus any additional
497 ******************************************************************************/
500 AcpiUtGetSimpleObjectSize (
501 ACPI_OPERAND_OBJECT *InternalObject,
502 ACPI_SIZE *ObjLength)
505 ACPI_STATUS Status = AE_OK;
508 ACPI_FUNCTION_TRACE_PTR ("UtGetSimpleObjectSize", InternalObject);
511 /* Handle a null object (Could be a uninitialized package element -- which is legal) */
516 return_ACPI_STATUS (AE_OK);
519 /* Start with the length of the Acpi object */
521 Length = sizeof (ACPI_OBJECT);
523 if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
525 /* Object is a named object (reference), just return the length */
527 *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
528 return_ACPI_STATUS (Status);
532 * The final length depends on the object type
533 * Strings and Buffers are packed right up against the parent object and
534 * must be accessed bytewise or there may be alignment problems on
537 switch (ACPI_GET_OBJECT_TYPE (InternalObject))
539 case ACPI_TYPE_STRING:
541 Length += (ACPI_SIZE) InternalObject->String.Length + 1;
545 case ACPI_TYPE_BUFFER:
547 Length += (ACPI_SIZE) InternalObject->Buffer.Length;
551 case ACPI_TYPE_INTEGER:
552 case ACPI_TYPE_PROCESSOR:
553 case ACPI_TYPE_POWER:
556 * No extra data for these types
561 case ACPI_TYPE_LOCAL_REFERENCE:
563 switch (InternalObject->Reference.Opcode)
565 case AML_INT_NAMEPATH_OP:
568 * Get the actual length of the full pathname to this object.
569 * The reference will be converted to the pathname to the object
571 Length += ACPI_ROUND_UP_TO_NATIVE_WORD (AcpiNsGetPathnameLength (InternalObject->Reference.Node));
577 * No other reference opcodes are supported.
578 * Notably, Locals and Args are not supported, but this may be
579 * required eventually.
581 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
582 "Unsupported Reference opcode=%X in object %p\n",
583 InternalObject->Reference.Opcode, InternalObject));
592 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported type=%X in object %p\n",
593 ACPI_GET_OBJECT_TYPE (InternalObject), InternalObject));
599 * Account for the space required by the object rounded up to the next
600 * multiple of the machine word size. This keeps each object aligned
601 * on a machine word boundary. (preventing alignment faults on some
604 *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
605 return_ACPI_STATUS (Status);
609 /*******************************************************************************
611 * FUNCTION: AcpiUtGetElementLength
613 * PARAMETERS: ACPI_PKG_CALLBACK
617 * DESCRIPTION: Get the length of one package element.
619 ******************************************************************************/
622 AcpiUtGetElementLength (
624 ACPI_OPERAND_OBJECT *SourceObject,
625 ACPI_GENERIC_STATE *State,
628 ACPI_STATUS Status = AE_OK;
629 ACPI_PKG_INFO *Info = (ACPI_PKG_INFO *) Context;
630 ACPI_SIZE ObjectSpace;
635 case ACPI_COPY_TYPE_SIMPLE:
638 * Simple object - just get the size (Null object/entry is handled
639 * here also) and sum it into the running package length
641 Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
642 if (ACPI_FAILURE (Status))
647 Info->Length += ObjectSpace;
651 case ACPI_COPY_TYPE_PACKAGE:
653 /* Package object - nothing much to do here, let the walk handle it */
656 State->Pkg.ThisTargetObj = NULL;
662 /* No other types allowed */
664 return (AE_BAD_PARAMETER);
671 /*******************************************************************************
673 * FUNCTION: AcpiUtGetPackageObjectSize
675 * PARAMETERS: *InternalObject - Pointer to the object we are examining
676 * *ObjLength - Where the length is returned
680 * DESCRIPTION: This function is called to determine the space required to
681 * contain a package object for return to an external user.
683 * This is moderately complex since a package contains other
684 * objects including packages.
686 ******************************************************************************/
689 AcpiUtGetPackageObjectSize (
690 ACPI_OPERAND_OBJECT *InternalObject,
691 ACPI_SIZE *ObjLength)
697 ACPI_FUNCTION_TRACE_PTR ("UtGetPackageObjectSize", InternalObject);
701 Info.ObjectSpace = 0;
702 Info.NumPackages = 1;
704 Status = AcpiUtWalkPackageTree (InternalObject, NULL,
705 AcpiUtGetElementLength, &Info);
706 if (ACPI_FAILURE (Status))
708 return_ACPI_STATUS (Status);
712 * We have handled all of the objects in all levels of the package.
713 * just add the length of the package objects themselves.
714 * Round up to the next machine word.
716 Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT)) *
717 (ACPI_SIZE) Info.NumPackages;
719 /* Return the total package length */
721 *ObjLength = Info.Length;
722 return_ACPI_STATUS (Status);
726 /*******************************************************************************
728 * FUNCTION: AcpiUtGetObjectSize
730 * PARAMETERS: *InternalObject - Pointer to the object we are examining
731 * *ObjLength - Where the length will be returned
735 * DESCRIPTION: This function is called to determine the space required to
736 * contain an object for return to an API user.
738 ******************************************************************************/
742 ACPI_OPERAND_OBJECT *InternalObject,
743 ACPI_SIZE *ObjLength)
748 ACPI_FUNCTION_ENTRY ();
751 if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_OPERAND) &&
752 (ACPI_GET_OBJECT_TYPE (InternalObject) == ACPI_TYPE_PACKAGE))
754 Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
758 Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);