1 /******************************************************************************
2 *
3 * Module Name: utxfinit - External interfaces for ACPICA initialization
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2015, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #define EXPORT_ACPI_INTERFACES
45
46 #include <acpi/acpi.h>
47 #include "accommon.h"
48 #include "acevents.h"
49 #include "acnamesp.h"
50 #include "acdebug.h"
51 #include "actables.h"
52
53 #define _COMPONENT ACPI_UTILITIES
54 ACPI_MODULE_NAME("utxfinit")
55
56 /* For acpi_exec only */
57 void ae_do_object_overrides(void);
58
59 /*******************************************************************************
60 *
61 * FUNCTION: acpi_initialize_subsystem
62 *
63 * PARAMETERS: None
64 *
65 * RETURN: Status
66 *
67 * DESCRIPTION: Initializes all global variables. This is the first function
68 * called, so any early initialization belongs here.
69 *
70 ******************************************************************************/
71
acpi_initialize_subsystem(void)72 acpi_status __init acpi_initialize_subsystem(void)
73 {
74 acpi_status status;
75
76 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
77
78 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
79 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
80
81 /* Initialize the OS-Dependent layer */
82
83 status = acpi_os_initialize();
84 if (ACPI_FAILURE(status)) {
85 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
86 return_ACPI_STATUS(status);
87 }
88
89 /* Initialize all globals used by the subsystem */
90
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);
96 }
97
98 /* Create the default mutex objects */
99
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);
105 }
106
107 /*
108 * Initialize the namespace manager and
109 * the root of the namespace tree
110 */
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);
116 }
117
118 /* Initialize the global OSI interfaces list with the static names */
119
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);
125 }
126
127 /* If configured, initialize the AML debugger */
128
129 #ifdef ACPI_DEBUGGER
130 status = acpi_db_initialize();
131 if (ACPI_FAILURE(status)) {
132 ACPI_EXCEPTION((AE_INFO, status,
133 "During Debugger initialization"));
134 return_ACPI_STATUS(status);
135 }
136 #endif
137
138 return_ACPI_STATUS(AE_OK);
139 }
140
ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)141 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
142
143 /*******************************************************************************
144 *
145 * FUNCTION: acpi_enable_subsystem
146 *
147 * PARAMETERS: flags - Init/enable Options
148 *
149 * RETURN: Status
150 *
151 * DESCRIPTION: Completes the subsystem initialization including hardware.
152 * Puts system into ACPI mode if it isn't already.
153 *
154 ******************************************************************************/
155 acpi_status __init acpi_enable_subsystem(u32 flags)
156 {
157 acpi_status status = AE_OK;
158
159 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
160
161 #if (!ACPI_REDUCED_HARDWARE)
162
163 /* Enable ACPI mode */
164
165 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
166 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
167 "[Init] Going into ACPI mode\n"));
168
169 acpi_gbl_original_mode = acpi_hw_get_mode();
170
171 status = acpi_enable();
172 if (ACPI_FAILURE(status)) {
173 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
174 return_ACPI_STATUS(status);
175 }
176 }
177
178 /*
179 * Obtain a permanent mapping for the FACS. This is required for the
180 * Global Lock and the Firmware Waking Vector
181 */
182 if (!(flags & ACPI_NO_FACS_INIT)) {
183 status = acpi_tb_initialize_facs();
184 if (ACPI_FAILURE(status)) {
185 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
186 return_ACPI_STATUS(status);
187 }
188 }
189 #endif /* !ACPI_REDUCED_HARDWARE */
190
191 /*
192 * Install the default op_region handlers. These are installed unless
193 * other handlers have already been installed via the
194 * install_address_space_handler interface.
195 */
196 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
197 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
198 "[Init] Installing default address space handlers\n"));
199
200 status = acpi_ev_install_region_handlers();
201 if (ACPI_FAILURE(status)) {
202 return_ACPI_STATUS(status);
203 }
204 }
205 #if (!ACPI_REDUCED_HARDWARE)
206 /*
207 * Initialize ACPI Event handling (Fixed and General Purpose)
208 *
209 * Note1: We must have the hardware and events initialized before we can
210 * execute any control methods safely. Any control method can require
211 * ACPI hardware support, so the hardware must be fully initialized before
212 * any method execution!
213 *
214 * Note2: Fixed events are initialized and enabled here. GPEs are
215 * initialized, but cannot be enabled until after the hardware is
216 * completely initialized (SCI and global_lock activated) and the various
217 * initialization control methods are run (_REG, _STA, _INI) on the
218 * entire namespace.
219 */
220 if (!(flags & ACPI_NO_EVENT_INIT)) {
221 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
222 "[Init] Initializing ACPI events\n"));
223
224 status = acpi_ev_initialize_events();
225 if (ACPI_FAILURE(status)) {
226 return_ACPI_STATUS(status);
227 }
228 }
229
230 /*
231 * Install the SCI handler and Global Lock handler. This completes the
232 * hardware initialization.
233 */
234 if (!(flags & ACPI_NO_HANDLER_INIT)) {
235 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
236 "[Init] Installing SCI/GL handlers\n"));
237
238 status = acpi_ev_install_xrupt_handlers();
239 if (ACPI_FAILURE(status)) {
240 return_ACPI_STATUS(status);
241 }
242 }
243 #endif /* !ACPI_REDUCED_HARDWARE */
244
245 return_ACPI_STATUS(status);
246 }
247
ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)248 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
249
250 /*******************************************************************************
251 *
252 * FUNCTION: acpi_initialize_objects
253 *
254 * PARAMETERS: flags - Init/enable Options
255 *
256 * RETURN: Status
257 *
258 * DESCRIPTION: Completes namespace initialization by initializing device
259 * objects and executing AML code for Regions, buffers, etc.
260 *
261 ******************************************************************************/
262 acpi_status __init acpi_initialize_objects(u32 flags)
263 {
264 acpi_status status = AE_OK;
265
266 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
267
268 /*
269 * Run all _REG methods
270 *
271 * Note: Any objects accessed by the _REG methods will be automatically
272 * initialized, even if they contain executable AML (see the call to
273 * acpi_ns_initialize_objects below).
274 */
275 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
276 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
277 "[Init] Executing _REG OpRegion methods\n"));
278
279 status = acpi_ev_initialize_op_regions();
280 if (ACPI_FAILURE(status)) {
281 return_ACPI_STATUS(status);
282 }
283 }
284 #ifdef ACPI_EXEC_APP
285 /*
286 * This call implements the "initialization file" option for acpi_exec.
287 * This is the precise point that we want to perform the overrides.
288 */
289 ae_do_object_overrides();
290 #endif
291
292 /*
293 * Execute any module-level code that was detected during the table load
294 * phase. Although illegal since ACPI 2.0, there are many machines that
295 * contain this type of code. Each block of detected executable AML code
296 * outside of any control method is wrapped with a temporary control
297 * method object and placed on a global list. The methods on this list
298 * are executed below.
299 */
300 acpi_ns_exec_module_code_list();
301
302 /*
303 * Initialize the objects that remain uninitialized. This runs the
304 * executable AML that may be part of the declaration of these objects:
305 * operation_regions, buffer_fields, Buffers, and Packages.
306 */
307 if (!(flags & ACPI_NO_OBJECT_INIT)) {
308 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
309 "[Init] Completing Initialization of ACPI Objects\n"));
310
311 status = acpi_ns_initialize_objects();
312 if (ACPI_FAILURE(status)) {
313 return_ACPI_STATUS(status);
314 }
315 }
316
317 /*
318 * Initialize all device objects in the namespace. This runs the device
319 * _STA and _INI methods.
320 */
321 if (!(flags & ACPI_NO_DEVICE_INIT)) {
322 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
323 "[Init] Initializing ACPI Devices\n"));
324
325 status = acpi_ns_initialize_devices();
326 if (ACPI_FAILURE(status)) {
327 return_ACPI_STATUS(status);
328 }
329 }
330
331 /*
332 * Empty the caches (delete the cached objects) on the assumption that
333 * the table load filled them up more than they will be at runtime --
334 * thus wasting non-paged memory.
335 */
336 status = acpi_purge_cached_objects();
337
338 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
339 return_ACPI_STATUS(status);
340 }
341
342 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)
343