1/******************************************************************************
2 *
3 * Module Name: utxfinit - External interfaces for ACPICA initialization
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2014, 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/*******************************************************************************
57 *
58 * FUNCTION:    acpi_initialize_subsystem
59 *
60 * PARAMETERS:  None
61 *
62 * RETURN:      Status
63 *
64 * DESCRIPTION: Initializes all global variables. This is the first function
65 *              called, so any early initialization belongs here.
66 *
67 ******************************************************************************/
68acpi_status __init acpi_initialize_subsystem(void)
69{
70	acpi_status status;
71
72	ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
73
74	acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
75	ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
76
77	/* Initialize the OS-Dependent layer */
78
79	status = acpi_os_initialize();
80	if (ACPI_FAILURE(status)) {
81		ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
82		return_ACPI_STATUS(status);
83	}
84
85	/* Initialize all globals used by the subsystem */
86
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);
92	}
93
94	/* Create the default mutex objects */
95
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);
101	}
102
103	/*
104	 * Initialize the namespace manager and
105	 * the root of the namespace tree
106	 */
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);
112	}
113
114	/* Initialize the global OSI interfaces list with the static names */
115
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);
121	}
122
123	/* If configured, initialize the AML debugger */
124
125#ifdef ACPI_DEBUGGER
126	status = acpi_db_initialize();
127	if (ACPI_FAILURE(status)) {
128		ACPI_EXCEPTION((AE_INFO, status,
129				"During Debugger initialization"));
130		return_ACPI_STATUS(status);
131	}
132#endif
133
134	return_ACPI_STATUS(AE_OK);
135}
136
137ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
138
139/*******************************************************************************
140 *
141 * FUNCTION:    acpi_enable_subsystem
142 *
143 * PARAMETERS:  flags               - Init/enable Options
144 *
145 * RETURN:      Status
146 *
147 * DESCRIPTION: Completes the subsystem initialization including hardware.
148 *              Puts system into ACPI mode if it isn't already.
149 *
150 ******************************************************************************/
151acpi_status __init acpi_enable_subsystem(u32 flags)
152{
153	acpi_status status = AE_OK;
154
155	ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
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	status = acpi_tb_initialize_facs();
179	if (ACPI_FAILURE(status)) {
180		ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
181		return_ACPI_STATUS(status);
182	}
183#endif				/* !ACPI_REDUCED_HARDWARE */
184
185	/*
186	 * Install the default op_region handlers. These are installed unless
187	 * other handlers have already been installed via the
188	 * install_address_space_handler interface.
189	 */
190	if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
191		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
192				  "[Init] Installing default address space handlers\n"));
193
194		status = acpi_ev_install_region_handlers();
195		if (ACPI_FAILURE(status)) {
196			return_ACPI_STATUS(status);
197		}
198	}
199#if (!ACPI_REDUCED_HARDWARE)
200	/*
201	 * Initialize ACPI Event handling (Fixed and General Purpose)
202	 *
203	 * Note1: We must have the hardware and events initialized before we can
204	 * execute any control methods safely. Any control method can require
205	 * ACPI hardware support, so the hardware must be fully initialized before
206	 * any method execution!
207	 *
208	 * Note2: Fixed events are initialized and enabled here. GPEs are
209	 * initialized, but cannot be enabled until after the hardware is
210	 * completely initialized (SCI and global_lock activated) and the various
211	 * initialization control methods are run (_REG, _STA, _INI) on the
212	 * entire namespace.
213	 */
214	if (!(flags & ACPI_NO_EVENT_INIT)) {
215		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
216				  "[Init] Initializing ACPI events\n"));
217
218		status = acpi_ev_initialize_events();
219		if (ACPI_FAILURE(status)) {
220			return_ACPI_STATUS(status);
221		}
222	}
223
224	/*
225	 * Install the SCI handler and Global Lock handler. This completes the
226	 * hardware initialization.
227	 */
228	if (!(flags & ACPI_NO_HANDLER_INIT)) {
229		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
230				  "[Init] Installing SCI/GL handlers\n"));
231
232		status = acpi_ev_install_xrupt_handlers();
233		if (ACPI_FAILURE(status)) {
234			return_ACPI_STATUS(status);
235		}
236	}
237#endif				/* !ACPI_REDUCED_HARDWARE */
238
239	return_ACPI_STATUS(status);
240}
241
242ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
243
244/*******************************************************************************
245 *
246 * FUNCTION:    acpi_initialize_objects
247 *
248 * PARAMETERS:  flags               - Init/enable Options
249 *
250 * RETURN:      Status
251 *
252 * DESCRIPTION: Completes namespace initialization by initializing device
253 *              objects and executing AML code for Regions, buffers, etc.
254 *
255 ******************************************************************************/
256acpi_status __init acpi_initialize_objects(u32 flags)
257{
258	acpi_status status = AE_OK;
259
260	ACPI_FUNCTION_TRACE(acpi_initialize_objects);
261
262	/*
263	 * Run all _REG methods
264	 *
265	 * Note: Any objects accessed by the _REG methods will be automatically
266	 * initialized, even if they contain executable AML (see the call to
267	 * acpi_ns_initialize_objects below).
268	 */
269	if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
270		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
271				  "[Init] Executing _REG OpRegion methods\n"));
272
273		status = acpi_ev_initialize_op_regions();
274		if (ACPI_FAILURE(status)) {
275			return_ACPI_STATUS(status);
276		}
277	}
278
279	/*
280	 * Execute any module-level code that was detected during the table load
281	 * phase. Although illegal since ACPI 2.0, there are many machines that
282	 * contain this type of code. Each block of detected executable AML code
283	 * outside of any control method is wrapped with a temporary control
284	 * method object and placed on a global list. The methods on this list
285	 * are executed below.
286	 */
287	acpi_ns_exec_module_code_list();
288
289	/*
290	 * Initialize the objects that remain uninitialized. This runs the
291	 * executable AML that may be part of the declaration of these objects:
292	 * operation_regions, buffer_fields, Buffers, and Packages.
293	 */
294	if (!(flags & ACPI_NO_OBJECT_INIT)) {
295		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
296				  "[Init] Completing Initialization of ACPI Objects\n"));
297
298		status = acpi_ns_initialize_objects();
299		if (ACPI_FAILURE(status)) {
300			return_ACPI_STATUS(status);
301		}
302	}
303
304	/*
305	 * Initialize all device objects in the namespace. This runs the device
306	 * _STA and _INI methods.
307	 */
308	if (!(flags & ACPI_NO_DEVICE_INIT)) {
309		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
310				  "[Init] Initializing ACPI Devices\n"));
311
312		status = acpi_ns_initialize_devices();
313		if (ACPI_FAILURE(status)) {
314			return_ACPI_STATUS(status);
315		}
316	}
317
318	/*
319	 * Empty the caches (delete the cached objects) on the assumption that
320	 * the table load filled them up more than they will be at runtime --
321	 * thus wasting non-paged memory.
322	 */
323	status = acpi_purge_cached_objects();
324
325	acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
326	return_ACPI_STATUS(status);
327}
328
329ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)
330