1 /******************************************************************************
3 * Module Name: nsload - namespace loading/expanding/contracting procedures
5 *****************************************************************************/
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52 #define _COMPONENT ACPI_NAMESPACE
53 ACPI_MODULE_NAME ("nsload")
55 /* Local prototypes */
57 #ifdef ACPI_FUTURE_IMPLEMENTATION
59 AcpiNsUnloadNamespace (
64 ACPI_HANDLE StartHandle);
68 #ifndef ACPI_NO_METHOD_EXECUTION
69 /*******************************************************************************
71 * FUNCTION: AcpiNsLoadTable
73 * PARAMETERS: TableIndex - Index for table to be loaded
74 * Node - Owning NS node
78 * DESCRIPTION: Load one ACPI table into the namespace
80 ******************************************************************************/
85 ACPI_NAMESPACE_NODE *Node)
90 ACPI_FUNCTION_TRACE (NsLoadTable);
93 /* If table already loaded into namespace, just return */
95 if (AcpiTbIsTableLoaded (TableIndex))
97 Status = AE_ALREADY_EXISTS;
101 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
102 "**** Loading table into namespace ****\n"));
104 Status = AcpiTbAllocateOwnerId (TableIndex);
105 if (ACPI_FAILURE (Status))
111 * Parse the table and load the namespace with all named
112 * objects found within. Control methods are NOT parsed
113 * at this time. In fact, the control methods cannot be
114 * parsed until the entire namespace is loaded, because
115 * if a control method makes a forward reference (call)
116 * to another control method, we can't continue parsing
117 * because we don't know how many arguments to parse next!
119 Status = AcpiNsParseTable (TableIndex, Node);
120 if (ACPI_SUCCESS (Status))
122 AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
127 * On error, delete any namespace objects created by this table.
128 * We cannot initialize these objects, so delete them. There are
129 * a couple of expecially bad cases:
130 * AE_ALREADY_EXISTS - namespace collision.
131 * AE_NOT_FOUND - the target of a Scope operator does not
132 * exist. This target of Scope must already exist in the
133 * namespace, as per the ACPI specification.
135 AcpiNsDeleteNamespaceByOwner (
136 AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);
138 AcpiTbReleaseOwnerId (TableIndex);
139 return_ACPI_STATUS (Status);
143 if (ACPI_FAILURE (Status))
145 return_ACPI_STATUS (Status);
149 * Now we can parse the control methods. We always parse
150 * them here for a sanity check, and if configured for
151 * just-in-time parsing, we delete the control method
154 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
155 "**** Begin Table Object Initialization\n"));
157 AcpiExEnterInterpreter ();
158 Status = AcpiDsInitializeObjects (TableIndex, Node);
159 AcpiExExitInterpreter ();
161 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
162 "**** Completed Table Object Initialization\n"));
165 * Execute any module-level code that was detected during the table load
166 * phase. Although illegal since ACPI 2.0, there are many machines that
167 * contain this type of code. Each block of detected executable AML code
168 * outside of any control method is wrapped with a temporary control
169 * method object and placed on a global list. The methods on this list
170 * are executed below.
172 * This case executes the module-level code for each table immediately
173 * after the table has been loaded. This provides compatibility with
174 * other ACPI implementations. Optionally, the execution can be deferred
175 * until later, see AcpiInitializeObjects.
177 if (!AcpiGbl_ParseTableAsTermList && !AcpiGbl_GroupModuleLevelCode)
179 AcpiNsExecModuleCodeList ();
182 return_ACPI_STATUS (Status);
186 #ifdef ACPI_OBSOLETE_FUNCTIONS
187 /*******************************************************************************
189 * FUNCTION: AcpiLoadNamespace
195 * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
196 * (DSDT points to either the BIOS or a buffer.)
198 ******************************************************************************/
201 AcpiNsLoadNamespace (
207 ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
210 /* There must be at least a DSDT installed */
212 if (AcpiGbl_DSDT == NULL)
214 ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
215 return_ACPI_STATUS (AE_NO_ACPI_TABLES);
219 * Load the namespace. The DSDT is required,
220 * but the SSDT and PSDT tables are optional.
222 Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
223 if (ACPI_FAILURE (Status))
225 return_ACPI_STATUS (Status);
228 /* Ignore exceptions from these */
230 (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
231 (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
233 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
234 "ACPI Namespace successfully loaded at root %p\n",
237 return_ACPI_STATUS (Status);
241 #ifdef ACPI_FUTURE_IMPLEMENTATION
242 /*******************************************************************************
244 * FUNCTION: AcpiNsDeleteSubtree
246 * PARAMETERS: StartHandle - Handle in namespace where search begins
250 * DESCRIPTION: Walks the namespace starting at the given handle and deletes
251 * all objects, entries, and scopes in the entire subtree.
253 * Namespace/Interpreter should be locked or the subsystem should
254 * be in shutdown before this routine is called.
256 ******************************************************************************/
259 AcpiNsDeleteSubtree (
260 ACPI_HANDLE StartHandle)
263 ACPI_HANDLE ChildHandle;
264 ACPI_HANDLE ParentHandle;
265 ACPI_HANDLE NextChildHandle;
270 ACPI_FUNCTION_TRACE (NsDeleteSubtree);
273 ParentHandle = StartHandle;
278 * Traverse the tree of objects until we bubble back up
279 * to where we started.
283 /* Attempt to get the next object in this scope */
285 Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
286 ChildHandle, &NextChildHandle);
288 ChildHandle = NextChildHandle;
290 /* Did we get a new object? */
292 if (ACPI_SUCCESS (Status))
294 /* Check if this object has any children */
296 if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
300 * There is at least one child of this object,
304 ParentHandle = ChildHandle;
311 * No more children in this object, go back up to
312 * the object's parent
316 /* Delete all children now */
318 AcpiNsDeleteChildren (ChildHandle);
320 ChildHandle = ParentHandle;
321 Status = AcpiGetParent (ParentHandle, &ParentHandle);
322 if (ACPI_FAILURE (Status))
324 return_ACPI_STATUS (Status);
329 /* Now delete the starting object, and we are done */
331 AcpiNsRemoveNode (ChildHandle);
332 return_ACPI_STATUS (AE_OK);
336 /*******************************************************************************
338 * FUNCTION: AcpiNsUnloadNameSpace
340 * PARAMETERS: Handle - Root of namespace subtree to be deleted
344 * DESCRIPTION: Shrinks the namespace, typically in response to an undocking
345 * event. Deletes an entire subtree starting from (and
346 * including) the given handle.
348 ******************************************************************************/
351 AcpiNsUnloadNamespace (
357 ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
360 /* Parameter validation */
362 if (!AcpiGbl_RootNode)
364 return_ACPI_STATUS (AE_NO_NAMESPACE);
369 return_ACPI_STATUS (AE_BAD_PARAMETER);
372 /* This function does the real work */
374 Status = AcpiNsDeleteSubtree (Handle);
375 return_ACPI_STATUS (Status);