drivers/acpi/acpica/utxfinit.c

   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/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         return_ACPI_STATUS(AE_OK);
 128 }
 129
 130 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
 131
 132 /*******************************************************************************
 133  *
 134  * FUNCTION:    acpi_enable_subsystem
 135  *
 136  * PARAMETERS:  flags               - Init/enable Options
 137  *
 138  * RETURN:      Status
 139  *
 140  * DESCRIPTION: Completes the subsystem initialization including hardware.
 141  *              Puts system into ACPI mode if it isn't already.
 142  *
 143  ******************************************************************************/
 144 acpi_status __init acpi_enable_subsystem(u32 flags)
 145 {
 146         acpi_status status = AE_OK;
 147
 148         ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
 149
 150         /*
 151          * The early initialization phase is complete. The namespace is loaded,
 152          * and we can now support address spaces other than Memory, I/O, and
 153          * PCI_Config.
 154          */
 155         acpi_gbl_early_initialization = FALSE;
 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
 186         /*
 187          * Initialize ACPI Event handling (Fixed and General Purpose)
 188          *
 189          * Note1: We must have the hardware and events initialized before we can
 190          * execute any control methods safely. Any control method can require
 191          * ACPI hardware support, so the hardware must be fully initialized before
 192          * any method execution!
 193          *
 194          * Note2: Fixed events are initialized and enabled here. GPEs are
 195          * initialized, but cannot be enabled until after the hardware is
 196          * completely initialized (SCI and global_lock activated) and the various
 197          * initialization control methods are run (_REG, _STA, _INI) on the
 198          * entire namespace.
 199          */
 200         if (!(flags & ACPI_NO_EVENT_INIT)) {
 201                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 202                                   "[Init] Initializing ACPI events\n"));
 203
 204                 status = acpi_ev_initialize_events();
 205                 if (ACPI_FAILURE(status)) {
 206                         return_ACPI_STATUS(status);
 207                 }
 208         }
 209
 210         /*
 211          * Install the SCI handler and Global Lock handler. This completes the
 212          * hardware initialization.
 213          */
 214         if (!(flags & ACPI_NO_HANDLER_INIT)) {
 215                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 216                                   "[Init] Installing SCI/GL handlers\n"));
 217
 218                 status = acpi_ev_install_xrupt_handlers();
 219                 if (ACPI_FAILURE(status)) {
 220                         return_ACPI_STATUS(status);
 221                 }
 222         }
 223 #endif                          /* !ACPI_REDUCED_HARDWARE */
 224
 225         return_ACPI_STATUS(status);
 226 }
 227
 228 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
 229
 230 /*******************************************************************************
 231  *
 232  * FUNCTION:    acpi_initialize_objects
 233  *
 234  * PARAMETERS:  flags               - Init/enable Options
 235  *
 236  * RETURN:      Status
 237  *
 238  * DESCRIPTION: Completes namespace initialization by initializing device
 239  *              objects and executing AML code for Regions, buffers, etc.
 240  *
 241  ******************************************************************************/
 242 acpi_status __init acpi_initialize_objects(u32 flags)
 243 {
 244         acpi_status status = AE_OK;
 245
 246         ACPI_FUNCTION_TRACE(acpi_initialize_objects);
 247
 248 #ifdef ACPI_EXEC_APP
 249         /*
 250          * This call implements the "initialization file" option for acpi_exec.
 251          * This is the precise point that we want to perform the overrides.
 252          */
 253         ae_do_object_overrides();
 254 #endif
 255
 256         /*
 257          * Execute any module-level code that was detected during the table load
 258          * phase. Although illegal since ACPI 2.0, there are many machines that
 259          * contain this type of code. Each block of detected executable AML code
 260          * outside of any control method is wrapped with a temporary control
 261          * method object and placed on a global list. The methods on this list
 262          * are executed below.
 263          *
 264          * This case executes the module-level code for all tables only after
 265          * all of the tables have been loaded. It is a legacy option and is
 266          * not compatible with other ACPI implementations. See acpi_ns_load_table.
 267          */
 268         if (acpi_gbl_group_module_level_code) {
 269                 acpi_ns_exec_module_code_list();
 270
 271                 /*
 272                  * Initialize the objects that remain uninitialized. This
 273                  * runs the executable AML that may be part of the
 274                  * declaration of these objects:
 275                  * operation_regions, buffer_fields, Buffers, and Packages.
 276                  */
 277                 if (!(flags & ACPI_NO_OBJECT_INIT)) {
 278                         status = acpi_ns_initialize_objects();
 279                         if (ACPI_FAILURE(status)) {
 280                                 return_ACPI_STATUS(status);
 281                         }
 282                 }
 283         }
 284
 285         /*
 286          * Initialize all device/region objects in the namespace. This runs
 287          * the device _STA and _INI methods and region _REG methods.
 288          */
 289         if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) {
 290                 status = acpi_ns_initialize_devices(flags);
 291                 if (ACPI_FAILURE(status)) {
 292                         return_ACPI_STATUS(status);
 293                 }
 294         }
 295
 296         /*
 297          * Empty the caches (delete the cached objects) on the assumption that
 298          * the table load filled them up more than they will be at runtime --
 299          * thus wasting non-paged memory.
 300          */
 301         status = acpi_purge_cached_objects();
 302
 303         acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
 304         return_ACPI_STATUS(status);
 305 }
 306
 307 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)