kernel/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         /* 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         if (!(flags & ACPI_NO_FACS_INIT)) {
 183                 status = acpi_tb_initialize_facs();
 184                 if (ACPI_FAILURE(status)) {
 185                         ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
 186                         return_ACPI_STATUS(status);
 187                 }
 188         }
 189 #endif                          /* !ACPI_REDUCED_HARDWARE */
 190
 191         /*
 192          * Install the default op_region handlers. These are installed unless
 193          * other handlers have already been installed via the
 194          * install_address_space_handler interface.
 195          */
 196         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 197                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 198                                   "[Init] Installing default address space handlers\n"));
 199
 200                 status = acpi_ev_install_region_handlers();
 201                 if (ACPI_FAILURE(status)) {
 202                         return_ACPI_STATUS(status);
 203                 }
 204         }
 205 #if (!ACPI_REDUCED_HARDWARE)
 206         /*
 207          * Initialize ACPI Event handling (Fixed and General Purpose)
 208          *
 209          * Note1: We must have the hardware and events initialized before we can
 210          * execute any control methods safely. Any control method can require
 211          * ACPI hardware support, so the hardware must be fully initialized before
 212          * any method execution!
 213          *
 214          * Note2: Fixed events are initialized and enabled here. GPEs are
 215          * initialized, but cannot be enabled until after the hardware is
 216          * completely initialized (SCI and global_lock activated) and the various
 217          * initialization control methods are run (_REG, _STA, _INI) on the
 218          * entire namespace.
 219          */
 220         if (!(flags & ACPI_NO_EVENT_INIT)) {
 221                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 222                                   "[Init] Initializing ACPI events\n"));
 223
 224                 status = acpi_ev_initialize_events();
 225                 if (ACPI_FAILURE(status)) {
 226                         return_ACPI_STATUS(status);
 227                 }
 228         }
 229
 230         /*
 231          * Install the SCI handler and Global Lock handler. This completes the
 232          * hardware initialization.
 233          */
 234         if (!(flags & ACPI_NO_HANDLER_INIT)) {
 235                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 236                                   "[Init] Installing SCI/GL handlers\n"));
 237
 238                 status = acpi_ev_install_xrupt_handlers();
 239                 if (ACPI_FAILURE(status)) {
 240                         return_ACPI_STATUS(status);
 241                 }
 242         }
 243 #endif                          /* !ACPI_REDUCED_HARDWARE */
 244
 245         return_ACPI_STATUS(status);
 246 }
 247
 248 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
 249
 250 /*******************************************************************************
 251  *
 252  * FUNCTION:    acpi_initialize_objects
 253  *
 254  * PARAMETERS:  flags               - Init/enable Options
 255  *
 256  * RETURN:      Status
 257  *
 258  * DESCRIPTION: Completes namespace initialization by initializing device
 259  *              objects and executing AML code for Regions, buffers, etc.
 260  *
 261  ******************************************************************************/
 262 acpi_status __init acpi_initialize_objects(u32 flags)
 263 {
 264         acpi_status status = AE_OK;
 265
 266         ACPI_FUNCTION_TRACE(acpi_initialize_objects);
 267
 268         /*
 269          * Run all _REG methods
 270          *
 271          * Note: Any objects accessed by the _REG methods will be automatically
 272          * initialized, even if they contain executable AML (see the call to
 273          * acpi_ns_initialize_objects below).
 274          */
 275         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 276                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 277                                   "[Init] Executing _REG OpRegion methods\n"));
 278
 279                 status = acpi_ev_initialize_op_regions();
 280                 if (ACPI_FAILURE(status)) {
 281                         return_ACPI_STATUS(status);
 282                 }
 283         }
 284 #ifdef ACPI_EXEC_APP
 285         /*
 286          * This call implements the "initialization file" option for acpi_exec.
 287          * This is the precise point that we want to perform the overrides.
 288          */
 289         ae_do_object_overrides();
 290 #endif
 291
 292         /*
 293          * Execute any module-level code that was detected during the table load
 294          * phase. Although illegal since ACPI 2.0, there are many machines that
 295          * contain this type of code. Each block of detected executable AML code
 296          * outside of any control method is wrapped with a temporary control
 297          * method object and placed on a global list. The methods on this list
 298          * are executed below.
 299          */
 300         acpi_ns_exec_module_code_list();
 301
 302         /*
 303          * Initialize the objects that remain uninitialized. This runs the
 304          * executable AML that may be part of the declaration of these objects:
 305          * operation_regions, buffer_fields, Buffers, and Packages.
 306          */
 307         if (!(flags & ACPI_NO_OBJECT_INIT)) {
 308                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 309                                   "[Init] Completing Initialization of ACPI Objects\n"));
 310
 311                 status = acpi_ns_initialize_objects();
 312                 if (ACPI_FAILURE(status)) {
 313                         return_ACPI_STATUS(status);
 314                 }
 315         }
 316
 317         /*
 318          * Initialize all device objects in the namespace. This runs the device
 319          * _STA and _INI methods.
 320          */
 321         if (!(flags & ACPI_NO_DEVICE_INIT)) {
 322                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 323                                   "[Init] Initializing ACPI Devices\n"));
 324
 325                 status = acpi_ns_initialize_devices();
 326                 if (ACPI_FAILURE(status)) {
 327                         return_ACPI_STATUS(status);
 328                 }
 329         }
 330
 331         /*
 332          * Empty the caches (delete the cached objects) on the assumption that
 333          * the table load filled them up more than they will be at runtime --
 334          * thus wasting non-paged memory.
 335          */
 336         status = acpi_purge_cached_objects();
 337
 338         acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
 339         return_ACPI_STATUS(status);
 340 }
 341
 342 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)