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1/******************************************************************************
2 *
3 * Module Name: utxfinit - External interfaces for ACPICA initialization
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, 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
54ACPI_MODULE_NAME("utxfinit")
55
56/* For acpi_exec only */
57void 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
72acpi_status ACPI_INIT_FUNCTION 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 return_ACPI_STATUS(AE_OK);
128}
129
130ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
131
132/*******************************************************************************
133 *
134 * FUNCTION: acpi_enable_subsystem
135 *
136 * PARAMETERS: flags - Init/enable Options
137 *
138 * RETURN: Status
139 *
140 * DESCRIPTION: Completes the subsystem initialization including hardware.
141 * Puts system into ACPI mode if it isn't already.
142 *
143 ******************************************************************************/
144acpi_status ACPI_INIT_FUNCTION acpi_enable_subsystem(u32 flags)
145{
146 acpi_status status = AE_OK;
147
148 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
149
150 /*
151 * The early initialization phase is complete. The namespace is loaded,
152 * and we can now support address spaces other than Memory, I/O, and
153 * PCI_Config.
154 */
155 acpi_gbl_early_initialization = FALSE;
156
157#if (!ACPI_REDUCED_HARDWARE)
158
159 /* Enable ACPI mode */
160
161 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
162 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
163 "[Init] Going into ACPI mode\n"));
164
165 acpi_gbl_original_mode = acpi_hw_get_mode();
166
167 status = acpi_enable();
168 if (ACPI_FAILURE(status)) {
169 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
170 return_ACPI_STATUS(status);
171 }
172 }
173
174 /*
175 * Obtain a permanent mapping for the FACS. This is required for the
176 * Global Lock and the Firmware Waking Vector
177 */
178 if (!(flags & ACPI_NO_FACS_INIT)) {
179 status = acpi_tb_initialize_facs();
180 if (ACPI_FAILURE(status)) {
181 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
182 return_ACPI_STATUS(status);
183 }
184 }
185
186 /*
187 * Initialize ACPI Event handling (Fixed and General Purpose)
188 *
189 * Note1: We must have the hardware and events initialized before we can
190 * execute any control methods safely. Any control method can require
191 * ACPI hardware support, so the hardware must be fully initialized before
192 * any method execution!
193 *
194 * Note2: Fixed events are initialized and enabled here. GPEs are
195 * initialized, but cannot be enabled until after the hardware is
196 * completely initialized (SCI and global_lock activated) and the various
197 * initialization control methods are run (_REG, _STA, _INI) on the
198 * entire namespace.
199 */
200 if (!(flags & ACPI_NO_EVENT_INIT)) {
201 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
202 "[Init] Initializing ACPI events\n"));
203
204 status = acpi_ev_initialize_events();
205 if (ACPI_FAILURE(status)) {
206 return_ACPI_STATUS(status);
207 }
208 }
209
210 /*
211 * Install the SCI handler and Global Lock handler. This completes the
212 * hardware initialization.
213 */
214 if (!(flags & ACPI_NO_HANDLER_INIT)) {
215 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
216 "[Init] Installing SCI/GL handlers\n"));
217
218 status = acpi_ev_install_xrupt_handlers();
219 if (ACPI_FAILURE(status)) {
220 return_ACPI_STATUS(status);
221 }
222 }
223#endif /* !ACPI_REDUCED_HARDWARE */
224
225 return_ACPI_STATUS(status);
226}
227
228ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
229
230/*******************************************************************************
231 *
232 * FUNCTION: acpi_initialize_objects
233 *
234 * PARAMETERS: flags - Init/enable Options
235 *
236 * RETURN: Status
237 *
238 * DESCRIPTION: Completes namespace initialization by initializing device
239 * objects and executing AML code for Regions, buffers, etc.
240 *
241 ******************************************************************************/
242acpi_status ACPI_INIT_FUNCTION acpi_initialize_objects(u32 flags)
243{
244 acpi_status status = AE_OK;
245
246 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
247
248#ifdef ACPI_EXEC_APP
249 /*
250 * This call implements the "initialization file" option for acpi_exec.
251 * This is the precise point that we want to perform the overrides.
252 */
253 ae_do_object_overrides();
254#endif
255
256 /*
257 * Execute any module-level code that was detected during the table load
258 * phase. Although illegal since ACPI 2.0, there are many machines that
259 * contain this type of code. Each block of detected executable AML code
260 * outside of any control method is wrapped with a temporary control
261 * method object and placed on a global list. The methods on this list
262 * are executed below.
263 *
264 * This case executes the module-level code for all tables only after
265 * all of the tables have been loaded. It is a legacy option and is
266 * not compatible with other ACPI implementations. See acpi_ns_load_table.
267 */
268 if (!acpi_gbl_parse_table_as_term_list
269 && acpi_gbl_group_module_level_code) {
270 acpi_ns_exec_module_code_list();
271
272 /*
273 * Initialize the objects that remain uninitialized. This
274 * runs the executable AML that may be part of the
275 * declaration of these objects:
276 * operation_regions, buffer_fields, Buffers, and Packages.
277 */
278 if (!(flags & ACPI_NO_OBJECT_INIT)) {
279 status = acpi_ns_initialize_objects();
280 if (ACPI_FAILURE(status)) {
281 return_ACPI_STATUS(status);
282 }
283 }
284 }
285
286 /*
287 * Initialize all device/region objects in the namespace. This runs
288 * the device _STA and _INI methods and region _REG methods.
289 */
290 if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) {
291 status = acpi_ns_initialize_devices(flags);
292 if (ACPI_FAILURE(status)) {
293 return_ACPI_STATUS(status);
294 }
295 }
296
297 /*
298 * Empty the caches (delete the cached objects) on the assumption that
299 * the table load filled them up more than they will be at runtime --
300 * thus wasting non-paged memory.
301 */
302 status = acpi_purge_cached_objects();
303
304 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
305 return_ACPI_STATUS(status);
306}
307
308ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)