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.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 AcpiExec only */
57 void
58 AeDoObjectOverrides (
59     void);
60 
61 
62 /*******************************************************************************
63  *
64  * FUNCTION:    AcpiInitializeSubsystem
65  *
66  * PARAMETERS:  None
67  *
68  * RETURN:      Status
69  *
70  * DESCRIPTION: Initializes all global variables. This is the first function
71  *              called, so any early initialization belongs here.
72  *
73  ******************************************************************************/
74 
75 ACPI_STATUS
76 AcpiInitializeSubsystem (
77     void)
78 {
79     ACPI_STATUS             Status;
80 
81 
82     ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem);
83 
84 
85     AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE;
86     ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ());
87 
88     /* Initialize the OS-Dependent layer */
89 
90     Status = AcpiOsInitialize ();
91     if (ACPI_FAILURE (Status))
92     {
93         ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization"));
94         return_ACPI_STATUS (Status);
95     }
96 
97     /* Initialize all globals used by the subsystem */
98 
99     Status = AcpiUtInitGlobals ();
100     if (ACPI_FAILURE (Status))
101     {
102         ACPI_EXCEPTION ((AE_INFO, Status, "During initialization of globals"));
103         return_ACPI_STATUS (Status);
104     }
105 
106     /* Create the default mutex objects */
107 
108     Status = AcpiUtMutexInitialize ();
109     if (ACPI_FAILURE (Status))
110     {
111         ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation"));
112         return_ACPI_STATUS (Status);
113     }
114 
115     /*
116      * Initialize the namespace manager and
117      * the root of the namespace tree
118      */
119     Status = AcpiNsRootInitialize ();
120     if (ACPI_FAILURE (Status))
121     {
122         ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization"));
123         return_ACPI_STATUS (Status);
124     }
125 
126     /* Initialize the global OSI interfaces list with the static names */
127 
128     Status = AcpiUtInitializeInterfaces ();
129     if (ACPI_FAILURE (Status))
130     {
131         ACPI_EXCEPTION ((AE_INFO, Status, "During OSI interfaces initialization"));
132         return_ACPI_STATUS (Status);
133     }
134 
135     return_ACPI_STATUS (AE_OK);
136 }
137 
138 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeSubsystem)
139 
140 
141 /*******************************************************************************
142  *
143  * FUNCTION:    AcpiEnableSubsystem
144  *
145  * PARAMETERS:  Flags               - Init/enable Options
146  *
147  * RETURN:      Status
148  *
149  * DESCRIPTION: Completes the subsystem initialization including hardware.
150  *              Puts system into ACPI mode if it isn't already.
151  *
152  ******************************************************************************/
153 
154 ACPI_STATUS
155 AcpiEnableSubsystem (
156     UINT32                  Flags)
157 {
158     ACPI_STATUS             Status = AE_OK;
159 
160 
161     ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
162 
163 
164 #if (!ACPI_REDUCED_HARDWARE)
165 
166     /* Enable ACPI mode */
167 
168     if (!(Flags & ACPI_NO_ACPI_ENABLE))
169     {
170         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
171 
172         AcpiGbl_OriginalMode = AcpiHwGetMode();
173 
174         Status = AcpiEnable ();
175         if (ACPI_FAILURE (Status))
176         {
177             ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
178             return_ACPI_STATUS (Status);
179         }
180     }
181 
182     /*
183      * Obtain a permanent mapping for the FACS. This is required for the
184      * Global Lock and the Firmware Waking Vector
185      */
186     if (!(Flags & ACPI_NO_FACS_INIT))
187     {
188         Status = AcpiTbInitializeFacs ();
189         if (ACPI_FAILURE (Status))
190         {
191             ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
192             return_ACPI_STATUS (Status);
193         }
194     }
195 
196 #endif /* !ACPI_REDUCED_HARDWARE */
197 
198     /*
199      * Install the default OpRegion handlers. These are installed unless
200      * other handlers have already been installed via the
201      * InstallAddressSpaceHandler interface.
202      */
203     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
204     {
205         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
206             "[Init] Installing default address space handlers\n"));
207 
208         Status = AcpiEvInstallRegionHandlers ();
209         if (ACPI_FAILURE (Status))
210         {
211             return_ACPI_STATUS (Status);
212         }
213     }
214 
215 #if (!ACPI_REDUCED_HARDWARE)
216     /*
217      * Initialize ACPI Event handling (Fixed and General Purpose)
218      *
219      * Note1: We must have the hardware and events initialized before we can
220      * execute any control methods safely. Any control method can require
221      * ACPI hardware support, so the hardware must be fully initialized before
222      * any method execution!
223      *
224      * Note2: Fixed events are initialized and enabled here. GPEs are
225      * initialized, but cannot be enabled until after the hardware is
226      * completely initialized (SCI and GlobalLock activated) and the various
227      * initialization control methods are run (_REG, _STA, _INI) on the
228      * entire namespace.
229      */
230     if (!(Flags & ACPI_NO_EVENT_INIT))
231     {
232         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
233             "[Init] Initializing ACPI events\n"));
234 
235         Status = AcpiEvInitializeEvents ();
236         if (ACPI_FAILURE (Status))
237         {
238             return_ACPI_STATUS (Status);
239         }
240     }
241 
242     /*
243      * Install the SCI handler and Global Lock handler. This completes the
244      * hardware initialization.
245      */
246     if (!(Flags & ACPI_NO_HANDLER_INIT))
247     {
248         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
249             "[Init] Installing SCI/GL handlers\n"));
250 
251         Status = AcpiEvInstallXruptHandlers ();
252         if (ACPI_FAILURE (Status))
253         {
254             return_ACPI_STATUS (Status);
255         }
256     }
257 
258 #endif /* !ACPI_REDUCED_HARDWARE */
259 
260     return_ACPI_STATUS (Status);
261 }
262 
263 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem)
264 
265 
266 /*******************************************************************************
267  *
268  * FUNCTION:    AcpiInitializeObjects
269  *
270  * PARAMETERS:  Flags               - Init/enable Options
271  *
272  * RETURN:      Status
273  *
274  * DESCRIPTION: Completes namespace initialization by initializing device
275  *              objects and executing AML code for Regions, buffers, etc.
276  *
277  ******************************************************************************/
278 
279 ACPI_STATUS
280 AcpiInitializeObjects (
281     UINT32                  Flags)
282 {
283     ACPI_STATUS             Status = AE_OK;
284 
285 
286     ACPI_FUNCTION_TRACE (AcpiInitializeObjects);
287 
288 
289     /*
290      * Run all _REG methods
291      *
292      * Note: Any objects accessed by the _REG methods will be automatically
293      * initialized, even if they contain executable AML (see the call to
294      * AcpiNsInitializeObjects below).
295      */
296     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
297     {
298         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
299             "[Init] Executing _REG OpRegion methods\n"));
300 
301         Status = AcpiEvInitializeOpRegions ();
302         if (ACPI_FAILURE (Status))
303         {
304             return_ACPI_STATUS (Status);
305         }
306     }
307 
308 #ifdef ACPI_EXEC_APP
309     /*
310      * This call implements the "initialization file" option for AcpiExec.
311      * This is the precise point that we want to perform the overrides.
312      */
313     AeDoObjectOverrides ();
314 #endif
315 
316     /*
317      * Execute any module-level code that was detected during the table load
318      * phase. Although illegal since ACPI 2.0, there are many machines that
319      * contain this type of code. Each block of detected executable AML code
320      * outside of any control method is wrapped with a temporary control
321      * method object and placed on a global list. The methods on this list
322      * are executed below.
323      */
324     AcpiNsExecModuleCodeList ();
325 
326     /*
327      * Initialize the objects that remain uninitialized. This runs the
328      * executable AML that may be part of the declaration of these objects:
329      * OperationRegions, BufferFields, Buffers, and Packages.
330      */
331     if (!(Flags & ACPI_NO_OBJECT_INIT))
332     {
333         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
334             "[Init] Completing Initialization of ACPI Objects\n"));
335 
336         Status = AcpiNsInitializeObjects ();
337         if (ACPI_FAILURE (Status))
338         {
339             return_ACPI_STATUS (Status);
340         }
341     }
342 
343     /*
344      * Initialize all device objects in the namespace. This runs the device
345      * _STA and _INI methods.
346      */
347     if (!(Flags & ACPI_NO_DEVICE_INIT))
348     {
349         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
350             "[Init] Initializing ACPI Devices\n"));
351 
352         Status = AcpiNsInitializeDevices ();
353         if (ACPI_FAILURE (Status))
354         {
355             return_ACPI_STATUS (Status);
356         }
357     }
358 
359     /*
360      * Empty the caches (delete the cached objects) on the assumption that
361      * the table load filled them up more than they will be at runtime --
362      * thus wasting non-paged memory.
363      */
364     Status = AcpiPurgeCachedObjects ();
365 
366     AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK;
367     return_ACPI_STATUS (Status);
368 }
369 
370 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects)
371