1 /******************************************************************************
3 * Module Name: utxfinit - External interfaces for ACPICA initialization
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2013, Intel Corp.
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20 * including a substantially similar Disclaimer requirement for further
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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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 /*******************************************************************************
58 * FUNCTION: acpi_initialize_subsystem
64 * DESCRIPTION: Initializes all global variables. This is the first function
65 * called, so any early initialization belongs here.
67 ******************************************************************************/
68 acpi_status
acpi_initialize_subsystem(void)
72 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem
);
74 acpi_gbl_startup_flags
= ACPI_SUBSYSTEM_INITIALIZE
;
75 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
77 /* Initialize the OS-Dependent layer */
79 status
= acpi_os_initialize();
80 if (ACPI_FAILURE(status
)) {
81 ACPI_EXCEPTION((AE_INFO
, status
, "During OSL initialization"));
82 return_ACPI_STATUS(status
);
85 /* Initialize all globals used by the subsystem */
87 status
= acpi_ut_init_globals();
88 if (ACPI_FAILURE(status
)) {
89 ACPI_EXCEPTION((AE_INFO
, status
,
90 "During initialization of globals"));
91 return_ACPI_STATUS(status
);
94 /* Create the default mutex objects */
96 status
= acpi_ut_mutex_initialize();
97 if (ACPI_FAILURE(status
)) {
98 ACPI_EXCEPTION((AE_INFO
, status
,
99 "During Global Mutex creation"));
100 return_ACPI_STATUS(status
);
104 * Initialize the namespace manager and
105 * the root of the namespace tree
107 status
= acpi_ns_root_initialize();
108 if (ACPI_FAILURE(status
)) {
109 ACPI_EXCEPTION((AE_INFO
, status
,
110 "During Namespace initialization"));
111 return_ACPI_STATUS(status
);
114 /* Initialize the global OSI interfaces list with the static names */
116 status
= acpi_ut_initialize_interfaces();
117 if (ACPI_FAILURE(status
)) {
118 ACPI_EXCEPTION((AE_INFO
, status
,
119 "During OSI interfaces initialization"));
120 return_ACPI_STATUS(status
);
123 /* If configured, initialize the AML debugger */
125 ACPI_DEBUGGER_EXEC(status
= acpi_db_initialize());
126 return_ACPI_STATUS(status
);
128 ACPI_EXPORT_SYMBOL(acpi_initialize_subsystem
)
130 /*******************************************************************************
132 * FUNCTION: acpi_enable_subsystem
134 * PARAMETERS: flags - Init/enable Options
138 * DESCRIPTION: Completes the subsystem initialization including hardware.
139 * Puts system into ACPI mode if it isn't already.
141 ******************************************************************************/
142 acpi_status
acpi_enable_subsystem(u32 flags
)
144 acpi_status status
= AE_OK
;
146 ACPI_FUNCTION_TRACE(acpi_enable_subsystem
);
148 #if (!ACPI_REDUCED_HARDWARE)
150 /* Enable ACPI mode */
152 if (!(flags
& ACPI_NO_ACPI_ENABLE
)) {
153 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
154 "[Init] Going into ACPI mode\n"));
156 acpi_gbl_original_mode
= acpi_hw_get_mode();
158 status
= acpi_enable();
159 if (ACPI_FAILURE(status
)) {
160 ACPI_WARNING((AE_INFO
, "AcpiEnable failed"));
161 return_ACPI_STATUS(status
);
166 * Obtain a permanent mapping for the FACS. This is required for the
167 * Global Lock and the Firmware Waking Vector
169 status
= acpi_tb_initialize_facs();
170 if (ACPI_FAILURE(status
)) {
171 ACPI_WARNING((AE_INFO
, "Could not map the FACS table"));
172 return_ACPI_STATUS(status
);
174 #endif /* !ACPI_REDUCED_HARDWARE */
177 * Install the default op_region handlers. These are installed unless
178 * other handlers have already been installed via the
179 * install_address_space_handler interface.
181 if (!(flags
& ACPI_NO_ADDRESS_SPACE_INIT
)) {
182 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
183 "[Init] Installing default address space handlers\n"));
185 status
= acpi_ev_install_region_handlers();
186 if (ACPI_FAILURE(status
)) {
187 return_ACPI_STATUS(status
);
190 #if (!ACPI_REDUCED_HARDWARE)
192 * Initialize ACPI Event handling (Fixed and General Purpose)
194 * Note1: We must have the hardware and events initialized before we can
195 * execute any control methods safely. Any control method can require
196 * ACPI hardware support, so the hardware must be fully initialized before
197 * any method execution!
199 * Note2: Fixed events are initialized and enabled here. GPEs are
200 * initialized, but cannot be enabled until after the hardware is
201 * completely initialized (SCI and global_lock activated) and the various
202 * initialization control methods are run (_REG, _STA, _INI) on the
205 if (!(flags
& ACPI_NO_EVENT_INIT
)) {
206 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
207 "[Init] Initializing ACPI events\n"));
209 status
= acpi_ev_initialize_events();
210 if (ACPI_FAILURE(status
)) {
211 return_ACPI_STATUS(status
);
216 * Install the SCI handler and Global Lock handler. This completes the
217 * hardware initialization.
219 if (!(flags
& ACPI_NO_HANDLER_INIT
)) {
220 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
221 "[Init] Installing SCI/GL handlers\n"));
223 status
= acpi_ev_install_xrupt_handlers();
224 if (ACPI_FAILURE(status
)) {
225 return_ACPI_STATUS(status
);
228 #endif /* !ACPI_REDUCED_HARDWARE */
230 return_ACPI_STATUS(status
);
232 ACPI_EXPORT_SYMBOL(acpi_enable_subsystem
)
234 /*******************************************************************************
236 * FUNCTION: acpi_initialize_objects
238 * PARAMETERS: flags - Init/enable Options
242 * DESCRIPTION: Completes namespace initialization by initializing device
243 * objects and executing AML code for Regions, buffers, etc.
245 ******************************************************************************/
246 acpi_status
acpi_initialize_objects(u32 flags
)
248 acpi_status status
= AE_OK
;
250 ACPI_FUNCTION_TRACE(acpi_initialize_objects
);
253 * Run all _REG methods
255 * Note: Any objects accessed by the _REG methods will be automatically
256 * initialized, even if they contain executable AML (see the call to
257 * acpi_ns_initialize_objects below).
259 if (!(flags
& ACPI_NO_ADDRESS_SPACE_INIT
)) {
260 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
261 "[Init] Executing _REG OpRegion methods\n"));
263 status
= acpi_ev_initialize_op_regions();
264 if (ACPI_FAILURE(status
)) {
265 return_ACPI_STATUS(status
);
270 * Execute any module-level code that was detected during the table load
271 * phase. Although illegal since ACPI 2.0, there are many machines that
272 * contain this type of code. Each block of detected executable AML code
273 * outside of any control method is wrapped with a temporary control
274 * method object and placed on a global list. The methods on this list
275 * are executed below.
277 acpi_ns_exec_module_code_list();
280 * Initialize the objects that remain uninitialized. This runs the
281 * executable AML that may be part of the declaration of these objects:
282 * operation_regions, buffer_fields, Buffers, and Packages.
284 if (!(flags
& ACPI_NO_OBJECT_INIT
)) {
285 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
286 "[Init] Completing Initialization of ACPI Objects\n"));
288 status
= acpi_ns_initialize_objects();
289 if (ACPI_FAILURE(status
)) {
290 return_ACPI_STATUS(status
);
295 * Initialize all device objects in the namespace. This runs the device
296 * _STA and _INI methods.
298 if (!(flags
& ACPI_NO_DEVICE_INIT
)) {
299 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
300 "[Init] Initializing ACPI Devices\n"));
302 status
= acpi_ns_initialize_devices();
303 if (ACPI_FAILURE(status
)) {
304 return_ACPI_STATUS(status
);
309 * Empty the caches (delete the cached objects) on the assumption that
310 * the table load filled them up more than they will be at runtime --
311 * thus wasting non-paged memory.
313 status
= acpi_purge_cached_objects();
315 acpi_gbl_startup_flags
|= ACPI_INITIALIZED_OK
;
316 return_ACPI_STATUS(status
);
318 ACPI_EXPORT_SYMBOL(acpi_initialize_objects
)