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.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 ACPI_INIT_FUNCTION
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 ACPI_INIT_FUNCTION
155 AcpiEnableSubsystem (
156     UINT32                  Flags)
157 {
158     ACPI_STATUS             Status = AE_OK;
159 
160 
161     ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
162 
163 
164     /*
165      * The early initialization phase is complete. The namespace is loaded,
166      * and we can now support address spaces other than Memory, I/O, and
167      * PCI_Config.
168      */
169     AcpiGbl_EarlyInitialization = FALSE;
170 
171 #if (!ACPI_REDUCED_HARDWARE)
172 
173     /* Enable ACPI mode */
174 
175     if (!(Flags & ACPI_NO_ACPI_ENABLE))
176     {
177         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
178 
179         AcpiGbl_OriginalMode = AcpiHwGetMode();
180 
181         Status = AcpiEnable ();
182         if (ACPI_FAILURE (Status))
183         {
184             ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
185             return_ACPI_STATUS (Status);
186         }
187     }
188 
189     /*
190      * Obtain a permanent mapping for the FACS. This is required for the
191      * Global Lock and the Firmware Waking Vector
192      */
193     if (!(Flags & ACPI_NO_FACS_INIT))
194     {
195         Status = AcpiTbInitializeFacs ();
196         if (ACPI_FAILURE (Status))
197         {
198             ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
199             return_ACPI_STATUS (Status);
200         }
201     }
202 
203     /*
204      * Initialize ACPI Event handling (Fixed and General Purpose)
205      *
206      * Note1: We must have the hardware and events initialized before we can
207      * execute any control methods safely. Any control method can require
208      * ACPI hardware support, so the hardware must be fully initialized before
209      * any method execution!
210      *
211      * Note2: Fixed events are initialized and enabled here. GPEs are
212      * initialized, but cannot be enabled until after the hardware is
213      * completely initialized (SCI and GlobalLock activated) and the various
214      * initialization control methods are run (_REG, _STA, _INI) on the
215      * entire namespace.
216      */
217     if (!(Flags & ACPI_NO_EVENT_INIT))
218     {
219         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
220             "[Init] Initializing ACPI events\n"));
221 
222         Status = AcpiEvInitializeEvents ();
223         if (ACPI_FAILURE (Status))
224         {
225             return_ACPI_STATUS (Status);
226         }
227     }
228 
229     /*
230      * Install the SCI handler and Global Lock handler. This completes the
231      * hardware initialization.
232      */
233     if (!(Flags & ACPI_NO_HANDLER_INIT))
234     {
235         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
236             "[Init] Installing SCI/GL handlers\n"));
237 
238         Status = AcpiEvInstallXruptHandlers ();
239         if (ACPI_FAILURE (Status))
240         {
241             return_ACPI_STATUS (Status);
242         }
243     }
244 
245 #endif /* !ACPI_REDUCED_HARDWARE */
246 
247     return_ACPI_STATUS (Status);
248 }
249 
250 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem)
251 
252 
253 /*******************************************************************************
254  *
255  * FUNCTION:    AcpiInitializeObjects
256  *
257  * PARAMETERS:  Flags               - Init/enable Options
258  *
259  * RETURN:      Status
260  *
261  * DESCRIPTION: Completes namespace initialization by initializing device
262  *              objects and executing AML code for Regions, buffers, etc.
263  *
264  ******************************************************************************/
265 
266 ACPI_STATUS ACPI_INIT_FUNCTION
267 AcpiInitializeObjects (
268     UINT32                  Flags)
269 {
270     ACPI_STATUS             Status = AE_OK;
271 
272 
273     ACPI_FUNCTION_TRACE (AcpiInitializeObjects);
274 
275 
276 #ifdef ACPI_EXEC_APP
277     /*
278      * This call implements the "initialization file" option for AcpiExec.
279      * This is the precise point that we want to perform the overrides.
280      */
281     AeDoObjectOverrides ();
282 #endif
283 
284     /*
285      * Execute any module-level code that was detected during the table load
286      * phase. Although illegal since ACPI 2.0, there are many machines that
287      * contain this type of code. Each block of detected executable AML code
288      * outside of any control method is wrapped with a temporary control
289      * method object and placed on a global list. The methods on this list
290      * are executed below.
291      *
292      * This case executes the module-level code for all tables only after
293      * all of the tables have been loaded. It is a legacy option and is
294      * not compatible with other ACPI implementations. See AcpiNsLoadTable.
295      */
296     if (!AcpiGbl_ParseTableAsTermList && AcpiGbl_GroupModuleLevelCode)
297     {
298         AcpiNsExecModuleCodeList ();
299 
300         /*
301          * Initialize the objects that remain uninitialized. This
302          * runs the executable AML that may be part of the
303          * declaration of these objects:
304          * OperationRegions, BufferFields, Buffers, and Packages.
305          */
306         if (!(Flags & ACPI_NO_OBJECT_INIT))
307         {
308             Status = AcpiNsInitializeObjects ();
309             if (ACPI_FAILURE (Status))
310             {
311                 return_ACPI_STATUS (Status);
312             }
313         }
314     }
315 
316     /*
317      * Initialize all device/region objects in the namespace. This runs
318      * the device _STA and _INI methods and region _REG methods.
319      */
320     if (!(Flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT)))
321     {
322         Status = AcpiNsInitializeDevices (Flags);
323         if (ACPI_FAILURE (Status))
324         {
325             return_ACPI_STATUS (Status);
326         }
327     }
328 
329     /*
330      * Empty the caches (delete the cached objects) on the assumption that
331      * the table load filled them up more than they will be at runtime --
332      * thus wasting non-paged memory.
333      */
334     Status = AcpiPurgeCachedObjects ();
335 
336     AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK;
337     return_ACPI_STATUS (Status);
338 }
339 
340 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects)
341