drivers/acpi/acpica/utxfinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utxfinit - External interfaces for ACPICA initialization
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, 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 #if (!ACPI_REDUCED_HARDWARE)
 151
 152         /* Enable ACPI mode */
 153
 154         if (!(flags & ACPI_NO_ACPI_ENABLE)) {
 155                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 156                                   "[Init] Going into ACPI mode\n"));
 157
 158                 acpi_gbl_original_mode = acpi_hw_get_mode();
 159
 160                 status = acpi_enable();
 161                 if (ACPI_FAILURE(status)) {
 162                         ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
 163                         return_ACPI_STATUS(status);
 164                 }
 165         }
 166
 167         /*
 168          * Obtain a permanent mapping for the FACS. This is required for the
 169          * Global Lock and the Firmware Waking Vector
 170          */
 171         if (!(flags & ACPI_NO_FACS_INIT)) {
 172                 status = acpi_tb_initialize_facs();
 173                 if (ACPI_FAILURE(status)) {
 174                         ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
 175                         return_ACPI_STATUS(status);
 176                 }
 177         }
 178 #endif                          /* !ACPI_REDUCED_HARDWARE */
 179
 180         /*
 181          * Install the default op_region handlers. These are installed unless
 182          * other handlers have already been installed via the
 183          * install_address_space_handler interface.
 184          */
 185         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 186                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 187                                   "[Init] Installing default address space handlers\n"));
 188
 189                 status = acpi_ev_install_region_handlers();
 190                 if (ACPI_FAILURE(status)) {
 191                         return_ACPI_STATUS(status);
 192                 }
 193         }
 194 #if (!ACPI_REDUCED_HARDWARE)
 195         /*
 196          * Initialize ACPI Event handling (Fixed and General Purpose)
 197          *
 198          * Note1: We must have the hardware and events initialized before we can
 199          * execute any control methods safely. Any control method can require
 200          * ACPI hardware support, so the hardware must be fully initialized before
 201          * any method execution!
 202          *
 203          * Note2: Fixed events are initialized and enabled here. GPEs are
 204          * initialized, but cannot be enabled until after the hardware is
 205          * completely initialized (SCI and global_lock activated) and the various
 206          * initialization control methods are run (_REG, _STA, _INI) on the
 207          * entire namespace.
 208          */
 209         if (!(flags & ACPI_NO_EVENT_INIT)) {
 210                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 211                                   "[Init] Initializing ACPI events\n"));
 212
 213                 status = acpi_ev_initialize_events();
 214                 if (ACPI_FAILURE(status)) {
 215                         return_ACPI_STATUS(status);
 216                 }
 217         }
 218
 219         /*
 220          * Install the SCI handler and Global Lock handler. This completes the
 221          * hardware initialization.
 222          */
 223         if (!(flags & ACPI_NO_HANDLER_INIT)) {
 224                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 225                                   "[Init] Installing SCI/GL handlers\n"));
 226
 227                 status = acpi_ev_install_xrupt_handlers();
 228                 if (ACPI_FAILURE(status)) {
 229                         return_ACPI_STATUS(status);
 230                 }
 231         }
 232 #endif                          /* !ACPI_REDUCED_HARDWARE */
 233
 234         return_ACPI_STATUS(status);
 235 }
 236
 237 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
 238
 239 /*******************************************************************************
 240  *
 241  * FUNCTION:    acpi_initialize_objects
 242  *
 243  * PARAMETERS:  flags               - Init/enable Options
 244  *
 245  * RETURN:      Status
 246  *
 247  * DESCRIPTION: Completes namespace initialization by initializing device
 248  *              objects and executing AML code for Regions, buffers, etc.
 249  *
 250  ******************************************************************************/
 251 acpi_status __init acpi_initialize_objects(u32 flags)
 252 {
 253         acpi_status status = AE_OK;
 254
 255         ACPI_FUNCTION_TRACE(acpi_initialize_objects);
 256
 257         /*
 258          * Run all _REG methods
 259          *
 260          * Note: Any objects accessed by the _REG methods will be automatically
 261          * initialized, even if they contain executable AML (see the call to
 262          * acpi_ns_initialize_objects below).
 263          */
 264         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 265                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 266                                   "[Init] Executing _REG OpRegion methods\n"));
 267
 268                 status = acpi_ev_initialize_op_regions();
 269                 if (ACPI_FAILURE(status)) {
 270                         return_ACPI_STATUS(status);
 271                 }
 272         }
 273 #ifdef ACPI_EXEC_APP
 274         /*
 275          * This call implements the "initialization file" option for acpi_exec.
 276          * This is the precise point that we want to perform the overrides.
 277          */
 278         ae_do_object_overrides();
 279 #endif
 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)