drivers/acpi/acpica/utxfinit.c

   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
  54 ACPI_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  ******************************************************************************/
  68 acpi_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
 137 ACPI_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  ******************************************************************************/
 151 acpi_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         if (!(flags & ACPI_NO_FACS_INIT)) {
 179                 status = acpi_tb_initialize_facs();
 180                 if (ACPI_FAILURE(status)) {
 181                         ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
 182                         return_ACPI_STATUS(status);
 183                 }
 184         }
 185 #endif                          /* !ACPI_REDUCED_HARDWARE */
 186
 187         /*
 188          * Install the default op_region handlers. These are installed unless
 189          * other handlers have already been installed via the
 190          * install_address_space_handler interface.
 191          */
 192         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 193                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 194                                   "[Init] Installing default address space handlers\n"));
 195
 196                 status = acpi_ev_install_region_handlers();
 197                 if (ACPI_FAILURE(status)) {
 198                         return_ACPI_STATUS(status);
 199                 }
 200         }
 201 #if (!ACPI_REDUCED_HARDWARE)
 202         /*
 203          * Initialize ACPI Event handling (Fixed and General Purpose)
 204          *
 205          * Note1: We must have the hardware and events initialized before we can
 206          * execute any control methods safely. Any control method can require
 207          * ACPI hardware support, so the hardware must be fully initialized before
 208          * any method execution!
 209          *
 210          * Note2: Fixed events are initialized and enabled here. GPEs are
 211          * initialized, but cannot be enabled until after the hardware is
 212          * completely initialized (SCI and global_lock activated) and the various
 213          * initialization control methods are run (_REG, _STA, _INI) on the
 214          * entire namespace.
 215          */
 216         if (!(flags & ACPI_NO_EVENT_INIT)) {
 217                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 218                                   "[Init] Initializing ACPI events\n"));
 219
 220                 status = acpi_ev_initialize_events();
 221                 if (ACPI_FAILURE(status)) {
 222                         return_ACPI_STATUS(status);
 223                 }
 224         }
 225
 226         /*
 227          * Install the SCI handler and Global Lock handler. This completes the
 228          * hardware initialization.
 229          */
 230         if (!(flags & ACPI_NO_HANDLER_INIT)) {
 231                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 232                                   "[Init] Installing SCI/GL handlers\n"));
 233
 234                 status = acpi_ev_install_xrupt_handlers();
 235                 if (ACPI_FAILURE(status)) {
 236                         return_ACPI_STATUS(status);
 237                 }
 238         }
 239 #endif                          /* !ACPI_REDUCED_HARDWARE */
 240
 241         return_ACPI_STATUS(status);
 242 }
 243
 244 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
 245
 246 /*******************************************************************************
 247  *
 248  * FUNCTION:    acpi_initialize_objects
 249  *
 250  * PARAMETERS:  flags               - Init/enable Options
 251  *
 252  * RETURN:      Status
 253  *
 254  * DESCRIPTION: Completes namespace initialization by initializing device
 255  *              objects and executing AML code for Regions, buffers, etc.
 256  *
 257  ******************************************************************************/
 258 acpi_status __init acpi_initialize_objects(u32 flags)
 259 {
 260         acpi_status status = AE_OK;
 261
 262         ACPI_FUNCTION_TRACE(acpi_initialize_objects);
 263
 264         /*
 265          * Run all _REG methods
 266          *
 267          * Note: Any objects accessed by the _REG methods will be automatically
 268          * initialized, even if they contain executable AML (see the call to
 269          * acpi_ns_initialize_objects below).
 270          */
 271         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 272                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 273                                   "[Init] Executing _REG OpRegion methods\n"));
 274
 275                 status = acpi_ev_initialize_op_regions();
 276                 if (ACPI_FAILURE(status)) {
 277                         return_ACPI_STATUS(status);
 278                 }
 279         }
 280
 281         /*
 282          * Execute any module-level code that was detected during the table load
 283          * phase. Although illegal since ACPI 2.0, there are many machines that
 284          * contain this type of code. Each block of detected executable AML code
 285          * outside of any control method is wrapped with a temporary control
 286          * method object and placed on a global list. The methods on this list
 287          * are executed below.
 288          */
 289         acpi_ns_exec_module_code_list();
 290
 291         /*
 292          * Initialize the objects that remain uninitialized. This runs the
 293          * executable AML that may be part of the declaration of these objects:
 294          * operation_regions, buffer_fields, Buffers, and Packages.
 295          */
 296         if (!(flags & ACPI_NO_OBJECT_INIT)) {
 297                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 298                                   "[Init] Completing Initialization of ACPI Objects\n"));
 299
 300                 status = acpi_ns_initialize_objects();
 301                 if (ACPI_FAILURE(status)) {
 302                         return_ACPI_STATUS(status);
 303                 }
 304         }
 305
 306         /*
 307          * Initialize all device objects in the namespace. This runs the device
 308          * _STA and _INI methods.
 309          */
 310         if (!(flags & ACPI_NO_DEVICE_INIT)) {
 311                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 312                                   "[Init] Initializing ACPI Devices\n"));
 313
 314                 status = acpi_ns_initialize_devices();
 315                 if (ACPI_FAILURE(status)) {
 316                         return_ACPI_STATUS(status);
 317                 }
 318         }
 319
 320         /*
 321          * Empty the caches (delete the cached objects) on the assumption that
 322          * the table load filled them up more than they will be at runtime --
 323          * thus wasting non-paged memory.
 324          */
 325         status = acpi_purge_cached_objects();
 326
 327         acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
 328         return_ACPI_STATUS(status);
 329 }
 330
 331 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)