1 /******************************************************************************
3 * Module Name: utxfinit - External interfaces for ACPICA initialization
5 *****************************************************************************/
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44 #define EXPORT_ACPI_INTERFACES
46 #include <acpi/acpi.h>
53 #define _COMPONENT ACPI_UTILITIES
54 ACPI_MODULE_NAME("utxfinit")
56 /* For acpi_exec only */
57 void ae_do_object_overrides(void);
59 /*******************************************************************************
61 * FUNCTION: acpi_initialize_subsystem
67 * DESCRIPTION: Initializes all global variables. This is the first function
68 * called, so any early initialization belongs here.
70 ******************************************************************************/
72 acpi_status __init acpi_initialize_subsystem(void)
76 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
78 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
79 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
81 /* Initialize the OS-Dependent layer */
83 status = acpi_os_initialize();
84 if (ACPI_FAILURE(status)) {
85 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
86 return_ACPI_STATUS(status);
89 /* Initialize all globals used by the subsystem */
91 status = acpi_ut_init_globals();
92 if (ACPI_FAILURE(status)) {
93 ACPI_EXCEPTION((AE_INFO, status,
94 "During initialization of globals"));
95 return_ACPI_STATUS(status);
98 /* Create the default mutex objects */
100 status = acpi_ut_mutex_initialize();
101 if (ACPI_FAILURE(status)) {
102 ACPI_EXCEPTION((AE_INFO, status,
103 "During Global Mutex creation"));
104 return_ACPI_STATUS(status);
108 * Initialize the namespace manager and
109 * the root of the namespace tree
111 status = acpi_ns_root_initialize();
112 if (ACPI_FAILURE(status)) {
113 ACPI_EXCEPTION((AE_INFO, status,
114 "During Namespace initialization"));
115 return_ACPI_STATUS(status);
118 /* Initialize the global OSI interfaces list with the static names */
120 status = acpi_ut_initialize_interfaces();
121 if (ACPI_FAILURE(status)) {
122 ACPI_EXCEPTION((AE_INFO, status,
123 "During OSI interfaces initialization"));
124 return_ACPI_STATUS(status);
127 return_ACPI_STATUS(AE_OK);
130 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
132 /*******************************************************************************
134 * FUNCTION: acpi_enable_subsystem
136 * PARAMETERS: flags - Init/enable Options
140 * DESCRIPTION: Completes the subsystem initialization including hardware.
141 * Puts system into ACPI mode if it isn't already.
143 ******************************************************************************/
144 acpi_status __init acpi_enable_subsystem(u32 flags)
146 acpi_status status = AE_OK;
148 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
150 #if (!ACPI_REDUCED_HARDWARE)
152 /* Enable ACPI mode */
154 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
155 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
156 "[Init] Going into ACPI mode\n"));
158 acpi_gbl_original_mode = acpi_hw_get_mode();
160 status = acpi_enable();
161 if (ACPI_FAILURE(status)) {
162 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
163 return_ACPI_STATUS(status);
168 * Obtain a permanent mapping for the FACS. This is required for the
169 * Global Lock and the Firmware Waking Vector
171 if (!(flags & ACPI_NO_FACS_INIT)) {
172 status = acpi_tb_initialize_facs();
173 if (ACPI_FAILURE(status)) {
174 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
175 return_ACPI_STATUS(status);
178 #endif /* !ACPI_REDUCED_HARDWARE */
181 * Install the default op_region handlers. These are installed unless
182 * other handlers have already been installed via the
183 * install_address_space_handler interface.
185 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
186 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
187 "[Init] Installing default address space handlers\n"));
189 status = acpi_ev_install_region_handlers();
190 if (ACPI_FAILURE(status)) {
191 return_ACPI_STATUS(status);
194 #if (!ACPI_REDUCED_HARDWARE)
196 * Initialize ACPI Event handling (Fixed and General Purpose)
198 * Note1: We must have the hardware and events initialized before we can
199 * execute any control methods safely. Any control method can require
200 * ACPI hardware support, so the hardware must be fully initialized before
201 * any method execution!
203 * Note2: Fixed events are initialized and enabled here. GPEs are
204 * initialized, but cannot be enabled until after the hardware is
205 * completely initialized (SCI and global_lock activated) and the various
206 * initialization control methods are run (_REG, _STA, _INI) on the
209 if (!(flags & ACPI_NO_EVENT_INIT)) {
210 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
211 "[Init] Initializing ACPI events\n"));
213 status = acpi_ev_initialize_events();
214 if (ACPI_FAILURE(status)) {
215 return_ACPI_STATUS(status);
220 * Install the SCI handler and Global Lock handler. This completes the
221 * hardware initialization.
223 if (!(flags & ACPI_NO_HANDLER_INIT)) {
224 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
225 "[Init] Installing SCI/GL handlers\n"));
227 status = acpi_ev_install_xrupt_handlers();
228 if (ACPI_FAILURE(status)) {
229 return_ACPI_STATUS(status);
232 #endif /* !ACPI_REDUCED_HARDWARE */
234 return_ACPI_STATUS(status);
237 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
239 /*******************************************************************************
241 * FUNCTION: acpi_initialize_objects
243 * PARAMETERS: flags - Init/enable Options
247 * DESCRIPTION: Completes namespace initialization by initializing device
248 * objects and executing AML code for Regions, buffers, etc.
250 ******************************************************************************/
251 acpi_status __init acpi_initialize_objects(u32 flags)
253 acpi_status status = AE_OK;
255 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
258 * Run all _REG methods
260 * Note: Any objects accessed by the _REG methods will be automatically
261 * initialized, even if they contain executable AML (see the call to
262 * acpi_ns_initialize_objects below).
264 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
265 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
266 "[Init] Executing _REG OpRegion methods\n"));
268 status = acpi_ev_initialize_op_regions();
269 if (ACPI_FAILURE(status)) {
270 return_ACPI_STATUS(status);
275 * This call implements the "initialization file" option for acpi_exec.
276 * This is the precise point that we want to perform the overrides.
278 ae_do_object_overrides();
282 * Execute any module-level code that was detected during the table load
283 * phase. Although illegal since ACPI 2.0, there are many machines that
284 * contain this type of code. Each block of detected executable AML code
285 * outside of any control method is wrapped with a temporary control
286 * method object and placed on a global list. The methods on this list
287 * are executed below.
289 acpi_ns_exec_module_code_list();
292 * Initialize the objects that remain uninitialized. This runs the
293 * executable AML that may be part of the declaration of these objects:
294 * operation_regions, buffer_fields, Buffers, and Packages.
296 if (!(flags & ACPI_NO_OBJECT_INIT)) {
297 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
298 "[Init] Completing Initialization of ACPI Objects\n"));
300 status = acpi_ns_initialize_objects();
301 if (ACPI_FAILURE(status)) {
302 return_ACPI_STATUS(status);
307 * Initialize all device objects in the namespace. This runs the device
308 * _STA and _INI methods.
310 if (!(flags & ACPI_NO_DEVICE_INIT)) {
311 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
312 "[Init] Initializing ACPI Devices\n"));
314 status = acpi_ns_initialize_devices();
315 if (ACPI_FAILURE(status)) {
316 return_ACPI_STATUS(status);
321 * Empty the caches (delete the cached objects) on the assumption that
322 * the table load filled them up more than they will be at runtime --
323 * thus wasting non-paged memory.
325 status = acpi_purge_cached_objects();
327 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
328 return_ACPI_STATUS(status);
331 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)