1 /******************************************************************************
3 * Module Name: utxfinit - External interfaces for ACPICA initialization
5 *****************************************************************************/
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44 #define EXPORT_ACPI_INTERFACES
53 #define _COMPONENT ACPI_UTILITIES
54 ACPI_MODULE_NAME ("utxfinit")
56 /* For AcpiExec only */
62 /*******************************************************************************
64 * FUNCTION: AcpiInitializeSubsystem
70 * DESCRIPTION: Initializes all global variables. This is the first function
71 * called, so any early initialization belongs here.
73 ******************************************************************************/
76 AcpiInitializeSubsystem (
82 ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem);
85 AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE;
86 ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ());
88 /* Initialize the OS-Dependent layer */
90 Status = AcpiOsInitialize ();
91 if (ACPI_FAILURE (Status))
93 ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization"));
94 return_ACPI_STATUS (Status);
97 /* Initialize all globals used by the subsystem */
99 Status = AcpiUtInitGlobals ();
100 if (ACPI_FAILURE (Status))
102 ACPI_EXCEPTION ((AE_INFO, Status, "During initialization of globals"));
103 return_ACPI_STATUS (Status);
106 /* Create the default mutex objects */
108 Status = AcpiUtMutexInitialize ();
109 if (ACPI_FAILURE (Status))
111 ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation"));
112 return_ACPI_STATUS (Status);
116 * Initialize the namespace manager and
117 * the root of the namespace tree
119 Status = AcpiNsRootInitialize ();
120 if (ACPI_FAILURE (Status))
122 ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization"));
123 return_ACPI_STATUS (Status);
126 /* Initialize the global OSI interfaces list with the static names */
128 Status = AcpiUtInitializeInterfaces ();
129 if (ACPI_FAILURE (Status))
131 ACPI_EXCEPTION ((AE_INFO, Status, "During OSI interfaces initialization"));
132 return_ACPI_STATUS (Status);
135 return_ACPI_STATUS (AE_OK);
138 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeSubsystem)
141 /*******************************************************************************
143 * FUNCTION: AcpiEnableSubsystem
145 * PARAMETERS: Flags - Init/enable Options
149 * DESCRIPTION: Completes the subsystem initialization including hardware.
150 * Puts system into ACPI mode if it isn't already.
152 ******************************************************************************/
155 AcpiEnableSubsystem (
158 ACPI_STATUS Status = AE_OK;
161 ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
164 #if (!ACPI_REDUCED_HARDWARE)
166 /* Enable ACPI mode */
168 if (!(Flags & ACPI_NO_ACPI_ENABLE))
170 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
172 AcpiGbl_OriginalMode = AcpiHwGetMode();
174 Status = AcpiEnable ();
175 if (ACPI_FAILURE (Status))
177 ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
178 return_ACPI_STATUS (Status);
183 * Obtain a permanent mapping for the FACS. This is required for the
184 * Global Lock and the Firmware Waking Vector
186 if (!(Flags & ACPI_NO_FACS_INIT))
188 Status = AcpiTbInitializeFacs ();
189 if (ACPI_FAILURE (Status))
191 ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
192 return_ACPI_STATUS (Status);
196 #endif /* !ACPI_REDUCED_HARDWARE */
199 * Install the default OpRegion handlers. These are installed unless
200 * other handlers have already been installed via the
201 * InstallAddressSpaceHandler interface.
203 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
205 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
206 "[Init] Installing default address space handlers\n"));
208 Status = AcpiEvInstallRegionHandlers ();
209 if (ACPI_FAILURE (Status))
211 return_ACPI_STATUS (Status);
215 #if (!ACPI_REDUCED_HARDWARE)
217 * Initialize ACPI Event handling (Fixed and General Purpose)
219 * Note1: We must have the hardware and events initialized before we can
220 * execute any control methods safely. Any control method can require
221 * ACPI hardware support, so the hardware must be fully initialized before
222 * any method execution!
224 * Note2: Fixed events are initialized and enabled here. GPEs are
225 * initialized, but cannot be enabled until after the hardware is
226 * completely initialized (SCI and GlobalLock activated) and the various
227 * initialization control methods are run (_REG, _STA, _INI) on the
230 if (!(Flags & ACPI_NO_EVENT_INIT))
232 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
233 "[Init] Initializing ACPI events\n"));
235 Status = AcpiEvInitializeEvents ();
236 if (ACPI_FAILURE (Status))
238 return_ACPI_STATUS (Status);
243 * Install the SCI handler and Global Lock handler. This completes the
244 * hardware initialization.
246 if (!(Flags & ACPI_NO_HANDLER_INIT))
248 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
249 "[Init] Installing SCI/GL handlers\n"));
251 Status = AcpiEvInstallXruptHandlers ();
252 if (ACPI_FAILURE (Status))
254 return_ACPI_STATUS (Status);
258 #endif /* !ACPI_REDUCED_HARDWARE */
260 return_ACPI_STATUS (Status);
263 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem)
266 /*******************************************************************************
268 * FUNCTION: AcpiInitializeObjects
270 * PARAMETERS: Flags - Init/enable Options
274 * DESCRIPTION: Completes namespace initialization by initializing device
275 * objects and executing AML code for Regions, buffers, etc.
277 ******************************************************************************/
280 AcpiInitializeObjects (
283 ACPI_STATUS Status = AE_OK;
286 ACPI_FUNCTION_TRACE (AcpiInitializeObjects);
290 * Run all _REG methods
292 * Note: Any objects accessed by the _REG methods will be automatically
293 * initialized, even if they contain executable AML (see the call to
294 * AcpiNsInitializeObjects below).
296 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
298 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
299 "[Init] Executing _REG OpRegion methods\n"));
301 Status = AcpiEvInitializeOpRegions ();
302 if (ACPI_FAILURE (Status))
304 return_ACPI_STATUS (Status);
310 * This call implements the "initialization file" option for AcpiExec.
311 * This is the precise point that we want to perform the overrides.
313 AeDoObjectOverrides ();
317 * Execute any module-level code that was detected during the table load
318 * phase. Although illegal since ACPI 2.0, there are many machines that
319 * contain this type of code. Each block of detected executable AML code
320 * outside of any control method is wrapped with a temporary control
321 * method object and placed on a global list. The methods on this list
322 * are executed below.
324 AcpiNsExecModuleCodeList ();
327 * Initialize the objects that remain uninitialized. This runs the
328 * executable AML that may be part of the declaration of these objects:
329 * OperationRegions, BufferFields, Buffers, and Packages.
331 if (!(Flags & ACPI_NO_OBJECT_INIT))
333 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
334 "[Init] Completing Initialization of ACPI Objects\n"));
336 Status = AcpiNsInitializeObjects ();
337 if (ACPI_FAILURE (Status))
339 return_ACPI_STATUS (Status);
344 * Initialize all device objects in the namespace. This runs the device
345 * _STA and _INI methods.
347 if (!(Flags & ACPI_NO_DEVICE_INIT))
349 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
350 "[Init] Initializing ACPI Devices\n"));
352 Status = AcpiNsInitializeDevices ();
353 if (ACPI_FAILURE (Status))
355 return_ACPI_STATUS (Status);
360 * Empty the caches (delete the cached objects) on the assumption that
361 * the table load filled them up more than they will be at runtime --
362 * thus wasting non-paged memory.
364 Status = AcpiPurgeCachedObjects ();
366 AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK;
367 return_ACPI_STATUS (Status);
370 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects)