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
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 __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
141ACPI_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 ******************************************************************************/
155acpi_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
248ACPI_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 ******************************************************************************/
262acpi_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
342ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)
343