1 /*******************************************************************************
3 * Module Name: nsxfobj - Public interfaces to the ACPI subsystem
4 * ACPI Object oriented interfaces
6 ******************************************************************************/
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45 #define EXPORT_ACPI_INTERFACES
47 #include <contrib/dev/acpica/include/acpi.h>
48 #include <contrib/dev/acpica/include/accommon.h>
49 #include <contrib/dev/acpica/include/acnamesp.h>
52 #define _COMPONENT ACPI_NAMESPACE
53 ACPI_MODULE_NAME ("nsxfobj")
55 /*******************************************************************************
57 * FUNCTION: AcpiGetType
59 * PARAMETERS: Handle - Handle of object whose type is desired
60 * RetType - Where the type will be placed
64 * DESCRIPTION: This routine returns the type associatd with a particular handle
66 ******************************************************************************/
71 ACPI_OBJECT_TYPE *RetType)
73 ACPI_NAMESPACE_NODE *Node;
77 /* Parameter Validation */
81 return (AE_BAD_PARAMETER);
85 * Special case for the predefined Root Node
88 if (Handle == ACPI_ROOT_OBJECT)
90 *RetType = ACPI_TYPE_ANY;
94 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
95 if (ACPI_FAILURE (Status))
100 /* Convert and validate the handle */
102 Node = AcpiNsValidateHandle (Handle);
105 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
106 return (AE_BAD_PARAMETER);
109 *RetType = Node->Type;
112 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
116 ACPI_EXPORT_SYMBOL (AcpiGetType)
119 /*******************************************************************************
121 * FUNCTION: AcpiGetParent
123 * PARAMETERS: Handle - Handle of object whose parent is desired
124 * RetHandle - Where the parent handle will be placed
128 * DESCRIPTION: Returns a handle to the parent of the object represented by
131 ******************************************************************************/
136 ACPI_HANDLE *RetHandle)
138 ACPI_NAMESPACE_NODE *Node;
139 ACPI_NAMESPACE_NODE *ParentNode;
145 return (AE_BAD_PARAMETER);
148 /* Special case for the predefined Root Node (no parent) */
150 if (Handle == ACPI_ROOT_OBJECT)
152 return (AE_NULL_ENTRY);
155 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
156 if (ACPI_FAILURE (Status))
161 /* Convert and validate the handle */
163 Node = AcpiNsValidateHandle (Handle);
166 Status = AE_BAD_PARAMETER;
170 /* Get the parent entry */
172 ParentNode = Node->Parent;
173 *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, ParentNode);
175 /* Return exception if parent is null */
179 Status = AE_NULL_ENTRY;
185 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
189 ACPI_EXPORT_SYMBOL (AcpiGetParent)
192 /*******************************************************************************
194 * FUNCTION: AcpiGetNextObject
196 * PARAMETERS: Type - Type of object to be searched for
197 * Parent - Parent object whose children we are getting
198 * LastChild - Previous child that was found.
199 * The NEXT child will be returned
200 * RetHandle - Where handle to the next object is placed
204 * DESCRIPTION: Return the next peer object within the namespace. If Handle is
205 * valid, Scope is ignored. Otherwise, the first object within
208 ******************************************************************************/
212 ACPI_OBJECT_TYPE Type,
215 ACPI_HANDLE *RetHandle)
218 ACPI_NAMESPACE_NODE *Node;
219 ACPI_NAMESPACE_NODE *ParentNode = NULL;
220 ACPI_NAMESPACE_NODE *ChildNode = NULL;
223 /* Parameter validation */
225 if (Type > ACPI_TYPE_EXTERNAL_MAX)
227 return (AE_BAD_PARAMETER);
230 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
231 if (ACPI_FAILURE (Status))
236 /* If null handle, use the parent */
240 /* Start search at the beginning of the specified scope */
242 ParentNode = AcpiNsValidateHandle (Parent);
245 Status = AE_BAD_PARAMETER;
251 /* Non-null handle, ignore the parent */
252 /* Convert and validate the handle */
254 ChildNode = AcpiNsValidateHandle (Child);
257 Status = AE_BAD_PARAMETER;
262 /* Internal function does the real work */
264 Node = AcpiNsGetNextNodeTyped (Type, ParentNode, ChildNode);
267 Status = AE_NOT_FOUND;
273 *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node);
279 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
283 ACPI_EXPORT_SYMBOL (AcpiGetNextObject)