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 /* For acpi_exec only */
  57 void 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
  72 acpi_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
 141 ACPI_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  ******************************************************************************/
 155 acpi_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         status = acpi_tb_initialize_facs();
 183         if (ACPI_FAILURE(status)) {
 184                 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
 185                 return_ACPI_STATUS(status);
 186         }
 187 #endif                          /* !ACPI_REDUCED_HARDWARE */
 188
 189         /*
 190          * Install the default op_region handlers. These are installed unless
 191          * other handlers have already been installed via the
 192          * install_address_space_handler interface.
 193          */
 194         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 195                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 196                                   "[Init] Installing default address space handlers\n"));
 197
 198                 status = acpi_ev_install_region_handlers();
 199                 if (ACPI_FAILURE(status)) {
 200                         return_ACPI_STATUS(status);
 201                 }
 202         }
 203 #if (!ACPI_REDUCED_HARDWARE)
 204         /*
 205          * Initialize ACPI Event handling (Fixed and General Purpose)
 206          *
 207          * Note1: We must have the hardware and events initialized before we can
 208          * execute any control methods safely. Any control method can require
 209          * ACPI hardware support, so the hardware must be fully initialized before
 210          * any method execution!
 211          *
 212          * Note2: Fixed events are initialized and enabled here. GPEs are
 213          * initialized, but cannot be enabled until after the hardware is
 214          * completely initialized (SCI and global_lock activated) and the various
 215          * initialization control methods are run (_REG, _STA, _INI) on the
 216          * entire namespace.
 217          */
 218         if (!(flags & ACPI_NO_EVENT_INIT)) {
 219                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 220                                   "[Init] Initializing ACPI events\n"));
 221
 222                 status = acpi_ev_initialize_events();
 223                 if (ACPI_FAILURE(status)) {
 224                         return_ACPI_STATUS(status);
 225                 }
 226         }
 227
 228         /*
 229          * Install the SCI handler and Global Lock handler. This completes the
 230          * hardware initialization.
 231          */
 232         if (!(flags & ACPI_NO_HANDLER_INIT)) {
 233                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 234                                   "[Init] Installing SCI/GL handlers\n"));
 235
 236                 status = acpi_ev_install_xrupt_handlers();
 237                 if (ACPI_FAILURE(status)) {
 238                         return_ACPI_STATUS(status);
 239                 }
 240         }
 241 #endif                          /* !ACPI_REDUCED_HARDWARE */
 242
 243         return_ACPI_STATUS(status);
 244 }
 245
 246 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
 247
 248 /*******************************************************************************
 249  *
 250  * FUNCTION:    acpi_initialize_objects
 251  *
 252  * PARAMETERS:  flags               - Init/enable Options
 253  *
 254  * RETURN:      Status
 255  *
 256  * DESCRIPTION: Completes namespace initialization by initializing device
 257  *              objects and executing AML code for Regions, buffers, etc.
 258  *
 259  ******************************************************************************/
 260 acpi_status __init acpi_initialize_objects(u32 flags)
 261 {
 262         acpi_status status = AE_OK;
 263
 264         ACPI_FUNCTION_TRACE(acpi_initialize_objects);
 265
 266         /*
 267          * Run all _REG methods
 268          *
 269          * Note: Any objects accessed by the _REG methods will be automatically
 270          * initialized, even if they contain executable AML (see the call to
 271          * acpi_ns_initialize_objects below).
 272          */
 273         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 274                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 275                                   "[Init] Executing _REG OpRegion methods\n"));
 276
 277                 status = acpi_ev_initialize_op_regions();
 278                 if (ACPI_FAILURE(status)) {
 279                         return_ACPI_STATUS(status);
 280                 }
 281         }
 282 #ifdef ACPI_EXEC_APP
 283         /*
 284          * This call implements the "initialization file" option for acpi_exec.
 285          * This is the precise point that we want to perform the overrides.
 286          */
 287         ae_do_object_overrides();
 288 #endif
 289
 290         /*
 291          * Execute any module-level code that was detected during the table load
 292          * phase. Although illegal since ACPI 2.0, there are many machines that
 293          * contain this type of code. Each block of detected executable AML code
 294          * outside of any control method is wrapped with a temporary control
 295          * method object and placed on a global list. The methods on this list
 296          * are executed below.
 297          */
 298         acpi_ns_exec_module_code_list();
 299
 300         /*
 301          * Initialize the objects that remain uninitialized. This runs the
 302          * executable AML that may be part of the declaration of these objects:
 303          * operation_regions, buffer_fields, Buffers, and Packages.
 304          */
 305         if (!(flags & ACPI_NO_OBJECT_INIT)) {
 306                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 307                                   "[Init] Completing Initialization of ACPI Objects\n"));
 308
 309                 status = acpi_ns_initialize_objects();
 310                 if (ACPI_FAILURE(status)) {
 311                         return_ACPI_STATUS(status);
 312                 }
 313         }
 314
 315         /*
 316          * Initialize all device objects in the namespace. This runs the device
 317          * _STA and _INI methods.
 318          */
 319         if (!(flags & ACPI_NO_DEVICE_INIT)) {
 320                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 321                                   "[Init] Initializing ACPI Devices\n"));
 322
 323                 status = acpi_ns_initialize_devices();
 324                 if (ACPI_FAILURE(status)) {
 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 = acpi_purge_cached_objects();
 335
 336         acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
 337         return_ACPI_STATUS(status);
 338 }
 339
 340 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)