1 /******************************************************************************
   2  *
   3  * Module Name: utxfinit - External interfaces for ACPICA initialization
   4  *
   5  *****************************************************************************/
   6 
   7 /*
   8  * Copyright (C) 2000 - 2013, 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 
  45 #define __UTXFINIT_C__
  46 #define EXPORT_ACPI_INTERFACES
  47 
  48 #include "acpi.h"
  49 #include "accommon.h"
  50 #include "acevents.h"
  51 #include "acnamesp.h"
  52 #include "acdebug.h"
  53 #include "actables.h"
  54 
  55 #define _COMPONENT          ACPI_UTILITIES
  56         ACPI_MODULE_NAME    ("utxfinit")
  57 
  58 
  59 /*******************************************************************************
  60  *
  61  * FUNCTION:    AcpiInitializeSubsystem
  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 
  72 ACPI_STATUS
  73 AcpiInitializeSubsystem (
  74     void)
  75 {
  76     ACPI_STATUS             Status;
  77 
  78 
  79     ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem);
  80 
  81 
  82     AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE;
  83     ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ());
  84 
  85     /* Initialize the OS-Dependent layer */
  86 
  87     Status = AcpiOsInitialize ();
  88     if (ACPI_FAILURE (Status))
  89     {
  90         ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization"));
  91         return_ACPI_STATUS (Status);
  92     }
  93 
  94     /* Initialize all globals used by the subsystem */
  95 
  96     Status = AcpiUtInitGlobals ();
  97     if (ACPI_FAILURE (Status))
  98     {
  99         ACPI_EXCEPTION ((AE_INFO, Status, "During initialization of globals"));
 100         return_ACPI_STATUS (Status);
 101     }
 102 
 103     /* Create the default mutex objects */
 104 
 105     Status = AcpiUtMutexInitialize ();
 106     if (ACPI_FAILURE (Status))
 107     {
 108         ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation"));
 109         return_ACPI_STATUS (Status);
 110     }
 111 
 112     /*
 113      * Initialize the namespace manager and
 114      * the root of the namespace tree
 115      */
 116     Status = AcpiNsRootInitialize ();
 117     if (ACPI_FAILURE (Status))
 118     {
 119         ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization"));
 120         return_ACPI_STATUS (Status);
 121     }
 122 
 123     /* Initialize the global OSI interfaces list with the static names */
 124 
 125     Status = AcpiUtInitializeInterfaces ();
 126     if (ACPI_FAILURE (Status))
 127     {
 128         ACPI_EXCEPTION ((AE_INFO, Status, "During OSI interfaces initialization"));
 129         return_ACPI_STATUS (Status);
 130     }
 131 
 132     /* If configured, initialize the AML debugger */
 133 
 134 #ifdef ACPI_DEBUGGER
 135     Status = AcpiDbInitialize ();
 136     if (ACPI_FAILURE (Status))
 137     {
 138         ACPI_EXCEPTION ((AE_INFO, Status, "During Debugger initialization"));
 139         return_ACPI_STATUS (Status);
 140     }
 141 #endif
 142 
 143     return_ACPI_STATUS (AE_OK);
 144 }
 145 
 146 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeSubsystem)
 147 
 148 
 149 /*******************************************************************************
 150  *
 151  * FUNCTION:    AcpiEnableSubsystem
 152  *
 153  * PARAMETERS:  Flags               - Init/enable Options
 154  *
 155  * RETURN:      Status
 156  *
 157  * DESCRIPTION: Completes the subsystem initialization including hardware.
 158  *              Puts system into ACPI mode if it isn't already.
 159  *
 160  ******************************************************************************/
 161 
 162 ACPI_STATUS
 163 AcpiEnableSubsystem (
 164     UINT32                  Flags)
 165 {
 166     ACPI_STATUS             Status = AE_OK;
 167 
 168 
 169     ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
 170 
 171 
 172 #if (!ACPI_REDUCED_HARDWARE)
 173 
 174     /* Enable ACPI mode */
 175 
 176     if (!(Flags & ACPI_NO_ACPI_ENABLE))
 177     {
 178         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
 179 
 180         AcpiGbl_OriginalMode = AcpiHwGetMode();
 181 
 182         Status = AcpiEnable ();
 183         if (ACPI_FAILURE (Status))
 184         {
 185             ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
 186             return_ACPI_STATUS (Status);
 187         }
 188     }
 189 
 190     /*
 191      * Obtain a permanent mapping for the FACS. This is required for the
 192      * Global Lock and the Firmware Waking Vector
 193      */
 194     Status = AcpiTbInitializeFacs ();
 195     if (ACPI_FAILURE (Status))
 196     {
 197         ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
 198         return_ACPI_STATUS (Status);
 199     }
 200 
 201 #endif /* !ACPI_REDUCED_HARDWARE */
 202 
 203     /*
 204      * Install the default OpRegion handlers. These are installed unless
 205      * other handlers have already been installed via the
 206      * InstallAddressSpaceHandler interface.
 207      */
 208     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
 209     {
 210         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 211             "[Init] Installing default address space handlers\n"));
 212 
 213         Status = AcpiEvInstallRegionHandlers ();
 214         if (ACPI_FAILURE (Status))
 215         {
 216             return_ACPI_STATUS (Status);
 217         }
 218     }
 219 
 220 #if (!ACPI_REDUCED_HARDWARE)
 221     /*
 222      * Initialize ACPI Event handling (Fixed and General Purpose)
 223      *
 224      * Note1: We must have the hardware and events initialized before we can
 225      * execute any control methods safely. Any control method can require
 226      * ACPI hardware support, so the hardware must be fully initialized before
 227      * any method execution!
 228      *
 229      * Note2: Fixed events are initialized and enabled here. GPEs are
 230      * initialized, but cannot be enabled until after the hardware is
 231      * completely initialized (SCI and GlobalLock activated) and the various
 232      * initialization control methods are run (_REG, _STA, _INI) on the
 233      * entire namespace.
 234      */
 235     if (!(Flags & ACPI_NO_EVENT_INIT))
 236     {
 237         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 238             "[Init] Initializing ACPI events\n"));
 239 
 240         Status = AcpiEvInitializeEvents ();
 241         if (ACPI_FAILURE (Status))
 242         {
 243             return_ACPI_STATUS (Status);
 244         }
 245     }
 246 
 247     /*
 248      * Install the SCI handler and Global Lock handler. This completes the
 249      * hardware initialization.
 250      */
 251     if (!(Flags & ACPI_NO_HANDLER_INIT))
 252     {
 253         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 254             "[Init] Installing SCI/GL handlers\n"));
 255 
 256         Status = AcpiEvInstallXruptHandlers ();
 257         if (ACPI_FAILURE (Status))
 258         {
 259             return_ACPI_STATUS (Status);
 260         }
 261     }
 262 
 263 #endif /* !ACPI_REDUCED_HARDWARE */
 264 
 265     return_ACPI_STATUS (Status);
 266 }
 267 
 268 ACPI_EXPORT_SYMBOL_INIT (AcpiEnableSubsystem)
 269 
 270 
 271 /*******************************************************************************
 272  *
 273  * FUNCTION:    AcpiInitializeObjects
 274  *
 275  * PARAMETERS:  Flags               - Init/enable Options
 276  *
 277  * RETURN:      Status
 278  *
 279  * DESCRIPTION: Completes namespace initialization by initializing device
 280  *              objects and executing AML code for Regions, buffers, etc.
 281  *
 282  ******************************************************************************/
 283 
 284 ACPI_STATUS
 285 AcpiInitializeObjects (
 286     UINT32                  Flags)
 287 {
 288     ACPI_STATUS             Status = AE_OK;
 289 
 290 
 291     ACPI_FUNCTION_TRACE (AcpiInitializeObjects);
 292 
 293 
 294     /*
 295      * Run all _REG methods
 296      *
 297      * Note: Any objects accessed by the _REG methods will be automatically
 298      * initialized, even if they contain executable AML (see the call to
 299      * AcpiNsInitializeObjects below).
 300      */
 301     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
 302     {
 303         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 304             "[Init] Executing _REG OpRegion methods\n"));
 305 
 306         Status = AcpiEvInitializeOpRegions ();
 307         if (ACPI_FAILURE (Status))
 308         {
 309             return_ACPI_STATUS (Status);
 310         }
 311     }
 312 
 313     /*
 314      * Execute any module-level code that was detected during the table load
 315      * phase. Although illegal since ACPI 2.0, there are many machines that
 316      * contain this type of code. Each block of detected executable AML code
 317      * outside of any control method is wrapped with a temporary control
 318      * method object and placed on a global list. The methods on this list
 319      * are executed below.
 320      */
 321     AcpiNsExecModuleCodeList ();
 322 
 323     /*
 324      * Initialize the objects that remain uninitialized. This runs the
 325      * executable AML that may be part of the declaration of these objects:
 326      * OperationRegions, BufferFields, Buffers, and Packages.
 327      */
 328     if (!(Flags & ACPI_NO_OBJECT_INIT))
 329     {
 330         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 331             "[Init] Completing Initialization of ACPI Objects\n"));
 332 
 333         Status = AcpiNsInitializeObjects ();
 334         if (ACPI_FAILURE (Status))
 335         {
 336             return_ACPI_STATUS (Status);
 337         }
 338     }
 339 
 340     /*
 341      * Initialize all device objects in the namespace. This runs the device
 342      * _STA and _INI methods.
 343      */
 344     if (!(Flags & ACPI_NO_DEVICE_INIT))
 345     {
 346         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 347             "[Init] Initializing ACPI Devices\n"));
 348 
 349         Status = AcpiNsInitializeDevices ();
 350         if (ACPI_FAILURE (Status))
 351         {
 352             return_ACPI_STATUS (Status);
 353         }
 354     }
 355 
 356     /*
 357      * Empty the caches (delete the cached objects) on the assumption that
 358      * the table load filled them up more than they will be at runtime --
 359      * thus wasting non-paged memory.
 360      */
 361     Status = AcpiPurgeCachedObjects ();
 362 
 363     AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK;
 364     return_ACPI_STATUS (Status);
 365 }
 366 
 367 ACPI_EXPORT_SYMBOL_INIT (AcpiInitializeObjects)