1 /*******************************************************************************
3 * Module Name: nsobject - Utilities for objects attached to namespace
7 ******************************************************************************/
9 /******************************************************************************
13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp.
14 * All rights reserved.
18 * 2.1. This is your license from Intel Corp. under its intellectual property
19 * rights. You may have additional license terms from the party that provided
20 * you this software, covering your right to use that party's intellectual
23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
24 * copy of the source code appearing in this file ("Covered Code") an
25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
26 * base code distributed originally by Intel ("Original Intel Code") to copy,
27 * make derivatives, distribute, use and display any portion of the Covered
28 * Code in any form, with the right to sublicense such rights; and
30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
31 * license (with the right to sublicense), under only those claims of Intel
32 * patents that are infringed by the Original Intel Code, to make, use, sell,
33 * offer to sell, and import the Covered Code and derivative works thereof
34 * solely to the minimum extent necessary to exercise the above copyright
35 * license, and in no event shall the patent license extend to any additions
36 * to or modifications of the Original Intel Code. No other license or right
37 * is granted directly or by implication, estoppel or otherwise;
39 * The above copyright and patent license is granted only if the following
44 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
45 * Redistribution of source code of any substantial portion of the Covered
46 * Code or modification with rights to further distribute source must include
47 * the above Copyright Notice, the above License, this list of Conditions,
48 * and the following Disclaimer and Export Compliance provision. In addition,
49 * Licensee must cause all Covered Code to which Licensee contributes to
50 * contain a file documenting the changes Licensee made to create that Covered
51 * Code and the date of any change. Licensee must include in that file the
52 * documentation of any changes made by any predecessor Licensee. Licensee
53 * must include a prominent statement that the modification is derived,
54 * directly or indirectly, from Original Intel Code.
56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
57 * Redistribution of source code of any substantial portion of the Covered
58 * Code or modification without rights to further distribute source must
59 * include the following Disclaimer and Export Compliance provision in the
60 * documentation and/or other materials provided with distribution. In
61 * addition, Licensee may not authorize further sublicense of source of any
62 * portion of the Covered Code, and must include terms to the effect that the
63 * license from Licensee to its licensee is limited to the intellectual
64 * property embodied in the software Licensee provides to its licensee, and
65 * not to intellectual property embodied in modifications its licensee may
68 * 3.3. Redistribution of Executable. Redistribution in executable form of any
69 * substantial portion of the Covered Code or modification must reproduce the
70 * above Copyright Notice, and the following Disclaimer and Export Compliance
71 * provision in the documentation and/or other materials provided with the
74 * 3.4. Intel retains all right, title, and interest in and to the Original
77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78 * Intel shall be used in advertising or otherwise to promote the sale, use or
79 * other dealings in products derived from or relating to the Covered Code
80 * without prior written authorization from Intel.
82 * 4. Disclaimer and Export Compliance
84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
101 * 4.3. Licensee shall not export, either directly or indirectly, any of this
102 * software or system incorporating such software without first obtaining any
103 * required license or other approval from the U. S. Department of Commerce or
104 * any other agency or department of the United States Government. In the
105 * event Licensee exports any such software from the United States or
106 * re-exports any such software from a foreign destination, Licensee shall
107 * ensure that the distribution and export/re-export of the software is in
108 * compliance with all laws, regulations, orders, or other restrictions of the
109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110 * any of its subsidiaries will export/re-export any technical data, process,
111 * software, or service, directly or indirectly, to any country for which the
112 * United States government or any agency thereof requires an export license,
113 * other governmental approval, or letter of assurance, without first obtaining
114 * such license, approval or letter.
116 *****************************************************************************/
119 #define __NSOBJECT_C__
123 #include "acnamesp.h"
124 #include "acinterp.h"
125 #include "actables.h"
128 #define _COMPONENT NAMESPACE
129 MODULE_NAME ("nsobject")
132 /*******************************************************************************
134 * FUNCTION: AcpiNsAttachObject
136 * PARAMETERS: Node - Parent Node
137 * Object - Object to be attached
138 * Type - Type of object, or ACPI_TYPE_ANY if not
141 * DESCRIPTION: Record the given object as the value associated with the
142 * name whose ACPI_HANDLE is passed. If Object is NULL
143 * and Type is ACPI_TYPE_ANY, set the name as having no value.
145 * MUTEX: Assumes namespace is locked
147 ******************************************************************************/
151 ACPI_NAMESPACE_NODE *Node,
152 ACPI_OPERAND_OBJECT *Object,
153 OBJECT_TYPE_INTERNAL Type)
155 ACPI_OPERAND_OBJECT *ObjDesc;
156 ACPI_OPERAND_OBJECT *PreviousObjDesc;
157 OBJECT_TYPE_INTERNAL ObjType = ACPI_TYPE_ANY;
162 FUNCTION_TRACE ("NsAttachObject");
166 * Parameter validation
169 if (!AcpiGbl_RootNode)
171 /* Name space not initialized */
173 REPORT_ERROR (("NsAttachObject: Namespace not initialized\n"));
174 return_ACPI_STATUS (AE_NO_NAMESPACE);
181 REPORT_ERROR (("NsAttachObject: Null NamedObj handle\n"));
182 return_ACPI_STATUS (AE_BAD_PARAMETER);
185 if (!Object && (ACPI_TYPE_ANY != Type))
189 REPORT_ERROR (("NsAttachObject: Null object, but type not ACPI_TYPE_ANY\n"));
190 return_ACPI_STATUS (AE_BAD_PARAMETER);
193 if (!VALID_DESCRIPTOR_TYPE (Node, ACPI_DESC_TYPE_NAMED))
195 /* Not a name handle */
197 REPORT_ERROR (("NsAttachObject: Invalid handle\n"));
198 return_ACPI_STATUS (AE_BAD_PARAMETER);
201 /* Check if this object is already attached */
203 if (Node->Object == Object)
205 DEBUG_PRINT (TRACE_EXEC,
206 ("NsAttachObject: Obj %p already installed in NameObj %p\n",
209 return_ACPI_STATUS (AE_OK);
213 /* Get the current flags field of the Node */
216 Flags &= ~ANOBJ_AML_ATTACHMENT;
219 /* If null object, we will just install it */
224 ObjType = ACPI_TYPE_ANY;
228 * If the object is an Node with an attached object,
229 * we will use that (attached) object
232 else if (VALID_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_NAMED) &&
233 ((ACPI_NAMESPACE_NODE *) Object)->Object)
236 * Value passed is a name handle and that name has a
237 * non-null value. Use that name's value and type.
240 ObjDesc = ((ACPI_NAMESPACE_NODE *) Object)->Object;
241 ObjType = ((ACPI_NAMESPACE_NODE *) Object)->Type;
244 * Copy appropriate flags
247 if (((ACPI_NAMESPACE_NODE *) Object)->Flags & ANOBJ_AML_ATTACHMENT)
249 Flags |= ANOBJ_AML_ATTACHMENT;
255 * Otherwise, we will use the parameter object, but we must type
261 ObjDesc = (ACPI_OPERAND_OBJECT *) Object;
264 /* If a valid type (non-ANY) was given, just use it */
266 if (ACPI_TYPE_ANY != Type)
273 * Type is TYPE_Any, we must try to determinte the
274 * actual type of the object
278 * Check if value points into the AML code
280 else if (AcpiTbSystemTablePointer (Object))
283 * Object points into the AML stream.
284 * Set a flag bit in the Node to indicate this
287 Flags |= ANOBJ_AML_ATTACHMENT;
290 * The next byte (perhaps the next two bytes)
291 * will be the AML opcode
294 MOVE_UNALIGNED16_TO_16 (&Opcode, Object);
296 /* Check for a recognized OpCode */
298 switch ((UINT8) Opcode)
303 if (Opcode != AML_REVISION_OP)
306 * OpPrefix is unrecognized unless part
313 /* Else fall through to set type as Number */
316 case AML_ZERO_OP: case AML_ONES_OP: case AML_ONE_OP:
317 case AML_BYTE_OP: case AML_WORD_OP: case AML_DWORD_OP:
319 ObjType = ACPI_TYPE_INTEGER;
325 ObjType = ACPI_TYPE_STRING;
331 ObjType = ACPI_TYPE_BUFFER;
337 ObjType = ACPI_TYPE_MUTEX;
343 ObjType = ACPI_TYPE_PACKAGE;
349 DEBUG_PRINT (ACPI_ERROR,
350 ("AML Opcode/Type [%x] not supported in attach\n",
353 return_ACPI_STATUS (AE_TYPE);
361 * Cannot figure out the type -- set to DefAny which
362 * will print as an error in the name table dump
365 if (GetDebugLevel () > 0)
368 "NsAttachObject confused: setting bogus type for ",
369 ACPI_INFO, _COMPONENT);
371 if (AcpiTbSystemTablePointer (Object))
373 DEBUG_PRINT (ACPI_INFO,
374 ("AML-stream code %02x\n", *(UINT8 *) Object));
377 else if (VALID_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_NAMED))
379 DUMP_PATHNAME (Object,
386 DUMP_PATHNAME (Object, "object ",
387 ACPI_INFO, _COMPONENT);
388 DUMP_STACK_ENTRY (Object);
392 ObjType = INTERNAL_TYPE_DEF_ANY;
397 DEBUG_PRINT (TRACE_EXEC,
398 ("NsAttachObject: Installing obj %p into NameObj %p [%4.4s]\n",
399 ObjDesc, Node, &Node->Name));
403 * Must increment the new value's reference count
404 * (if it is an internal object)
407 AcpiCmAddReference (ObjDesc);
409 /* Save the existing object (if any) for deletion later */
411 PreviousObjDesc = Node->Object;
413 /* Install the object and set the type, flags */
415 Node->Object = ObjDesc;
416 Node->Type = (UINT8) ObjType;
417 Node->Flags |= Flags;
421 * Delete an existing attached object.
426 /* One for the attach to the Node */
428 AcpiCmRemoveReference (PreviousObjDesc);
432 AcpiCmRemoveReference (PreviousObjDesc);
435 return_ACPI_STATUS (AE_OK);
439 /*******************************************************************************
441 * FUNCTION: AcpiNsDetachObject
443 * PARAMETERS: Node - An object whose Value will be deleted
447 * DESCRIPTION: Delete the Value associated with a namespace object. If the
448 * Value is an allocated object, it is freed. Otherwise, the
449 * field is simply cleared.
451 ******************************************************************************/
455 ACPI_NAMESPACE_NODE *Node)
457 ACPI_OPERAND_OBJECT *ObjDesc;
460 FUNCTION_TRACE ("NsDetachObject");
462 ObjDesc = Node->Object;
468 /* Clear the entry in all cases */
472 /* Found a valid value */
474 DEBUG_PRINT (ACPI_INFO,
475 ("NsDetachObject: Object=%p Value=%p Name %4.4s\n",
476 Node, ObjDesc, &Node->Name));
479 * Not every value is an object allocated via AcpiCmCallocate,
483 if (!AcpiTbSystemTablePointer (ObjDesc))
485 /* Attempt to delete the object (and all subobjects) */
487 AcpiCmRemoveReference (ObjDesc);
494 /*******************************************************************************
496 * FUNCTION: AcpiNsGetAttachedObject
498 * PARAMETERS: Handle - Parent Node to be examined
500 * RETURN: Current value of the object field from the Node whose
503 ******************************************************************************/
506 AcpiNsGetAttachedObject (
509 FUNCTION_TRACE_PTR ("NsGetAttachedObject", Handle);
516 DEBUG_PRINT (ACPI_WARN, ("NsGetAttachedObject: Null handle\n"));
520 return_PTR (((ACPI_NAMESPACE_NODE *) Handle)->Object);