drivers/acpi/acpica/utglobal.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utglobal - Global variables for the ACPI subsystem
   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 #define DEFINE_ACPI_GLOBALS
  46
  47 #include <acpi/acpi.h>
  48 #include "accommon.h"
  49
  50 #define _COMPONENT          ACPI_UTILITIES
  51 ACPI_MODULE_NAME("utglobal")
  52
  53 /*******************************************************************************
  54  *
  55  * Static global variable initialization.
  56  *
  57  ******************************************************************************/
  58 /* Debug output control masks */
  59 u32 acpi_dbg_level = ACPI_DEBUG_DEFAULT;
  60
  61 u32 acpi_dbg_layer = 0;
  62
  63 /* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */
  64
  65 struct acpi_table_fadt acpi_gbl_FADT;
  66 u32 acpi_gbl_trace_flags;
  67 acpi_name acpi_gbl_trace_method_name;
  68 u8 acpi_gbl_system_awake_and_running;
  69 u32 acpi_current_gpe_count;
  70
  71 /*
  72  * ACPI 5.0 introduces the concept of a "reduced hardware platform", meaning
  73  * that the ACPI hardware is no longer required. A flag in the FADT indicates
  74  * a reduced HW machine, and that flag is duplicated here for convenience.
  75  */
  76 u8 acpi_gbl_reduced_hardware;
  77
  78 /* Various state name strings */
  79
  80 const char *acpi_gbl_sleep_state_names[ACPI_S_STATE_COUNT] = {
  81         "\\_S0_",
  82         "\\_S1_",
  83         "\\_S2_",
  84         "\\_S3_",
  85         "\\_S4_",
  86         "\\_S5_"
  87 };
  88
  89 const char *acpi_gbl_lowest_dstate_names[ACPI_NUM_sx_w_METHODS] = {
  90         "_S0W",
  91         "_S1W",
  92         "_S2W",
  93         "_S3W",
  94         "_S4W"
  95 };
  96
  97 const char *acpi_gbl_highest_dstate_names[ACPI_NUM_sx_d_METHODS] = {
  98         "_S1D",
  99         "_S2D",
 100         "_S3D",
 101         "_S4D"
 102 };
 103
 104 /*******************************************************************************
 105  *
 106  * Namespace globals
 107  *
 108  ******************************************************************************/
 109 /*
 110  * Predefined ACPI Names (Built-in to the Interpreter)
 111  *
 112  * NOTES:
 113  * 1) _SB_ is defined to be a device to allow \_SB_._INI to be run
 114  *    during the initialization sequence.
 115  * 2) _TZ_ is defined to be a thermal zone in order to allow ASL code to
 116  *    perform a Notify() operation on it. 09/2010: Changed to type Device.
 117  *    This still allows notifies, but does not confuse host code that
 118  *    searches for valid thermal_zone objects.
 119  */
 120 const struct acpi_predefined_names acpi_gbl_pre_defined_names[] = {
 121         {"_GPE", ACPI_TYPE_LOCAL_SCOPE, NULL},
 122         {"_PR_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 123         {"_SB_", ACPI_TYPE_DEVICE, NULL},
 124         {"_SI_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 125         {"_TZ_", ACPI_TYPE_DEVICE, NULL},
 126         {"_REV", ACPI_TYPE_INTEGER, (char *)ACPI_CA_SUPPORT_LEVEL},
 127         {"_OS_", ACPI_TYPE_STRING, ACPI_OS_NAME},
 128         {"_GL_", ACPI_TYPE_MUTEX, (char *)1},
 129
 130 #if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
 131         {"_OSI", ACPI_TYPE_METHOD, (char *)1},
 132 #endif
 133
 134         /* Table terminator */
 135
 136         {NULL, ACPI_TYPE_ANY, NULL}
 137 };
 138
 139 #if (!ACPI_REDUCED_HARDWARE)
 140 /******************************************************************************
 141  *
 142  * Event and Hardware globals
 143  *
 144  ******************************************************************************/
 145
 146 struct acpi_bit_register_info acpi_gbl_bit_register_info[ACPI_NUM_BITREG] = {
 147         /* Name                                     Parent Register             Register Bit Position                   Register Bit Mask       */
 148
 149         /* ACPI_BITREG_TIMER_STATUS         */ {ACPI_REGISTER_PM1_STATUS,
 150                                                 ACPI_BITPOSITION_TIMER_STATUS,
 151                                                 ACPI_BITMASK_TIMER_STATUS},
 152         /* ACPI_BITREG_BUS_MASTER_STATUS    */ {ACPI_REGISTER_PM1_STATUS,
 153                                                 ACPI_BITPOSITION_BUS_MASTER_STATUS,
 154                                                 ACPI_BITMASK_BUS_MASTER_STATUS},
 155         /* ACPI_BITREG_GLOBAL_LOCK_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
 156                                                 ACPI_BITPOSITION_GLOBAL_LOCK_STATUS,
 157                                                 ACPI_BITMASK_GLOBAL_LOCK_STATUS},
 158         /* ACPI_BITREG_POWER_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
 159                                                 ACPI_BITPOSITION_POWER_BUTTON_STATUS,
 160                                                 ACPI_BITMASK_POWER_BUTTON_STATUS},
 161         /* ACPI_BITREG_SLEEP_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
 162                                                 ACPI_BITPOSITION_SLEEP_BUTTON_STATUS,
 163                                                 ACPI_BITMASK_SLEEP_BUTTON_STATUS},
 164         /* ACPI_BITREG_RT_CLOCK_STATUS      */ {ACPI_REGISTER_PM1_STATUS,
 165                                                 ACPI_BITPOSITION_RT_CLOCK_STATUS,
 166                                                 ACPI_BITMASK_RT_CLOCK_STATUS},
 167         /* ACPI_BITREG_WAKE_STATUS          */ {ACPI_REGISTER_PM1_STATUS,
 168                                                 ACPI_BITPOSITION_WAKE_STATUS,
 169                                                 ACPI_BITMASK_WAKE_STATUS},
 170         /* ACPI_BITREG_PCIEXP_WAKE_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
 171                                                 ACPI_BITPOSITION_PCIEXP_WAKE_STATUS,
 172                                                 ACPI_BITMASK_PCIEXP_WAKE_STATUS},
 173
 174         /* ACPI_BITREG_TIMER_ENABLE         */ {ACPI_REGISTER_PM1_ENABLE,
 175                                                 ACPI_BITPOSITION_TIMER_ENABLE,
 176                                                 ACPI_BITMASK_TIMER_ENABLE},
 177         /* ACPI_BITREG_GLOBAL_LOCK_ENABLE   */ {ACPI_REGISTER_PM1_ENABLE,
 178                                                 ACPI_BITPOSITION_GLOBAL_LOCK_ENABLE,
 179                                                 ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
 180         /* ACPI_BITREG_POWER_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 181                                                 ACPI_BITPOSITION_POWER_BUTTON_ENABLE,
 182                                                 ACPI_BITMASK_POWER_BUTTON_ENABLE},
 183         /* ACPI_BITREG_SLEEP_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 184                                                 ACPI_BITPOSITION_SLEEP_BUTTON_ENABLE,
 185                                                 ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
 186         /* ACPI_BITREG_RT_CLOCK_ENABLE      */ {ACPI_REGISTER_PM1_ENABLE,
 187                                                 ACPI_BITPOSITION_RT_CLOCK_ENABLE,
 188                                                 ACPI_BITMASK_RT_CLOCK_ENABLE},
 189         /* ACPI_BITREG_PCIEXP_WAKE_DISABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 190                                                 ACPI_BITPOSITION_PCIEXP_WAKE_DISABLE,
 191                                                 ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
 192
 193         /* ACPI_BITREG_SCI_ENABLE           */ {ACPI_REGISTER_PM1_CONTROL,
 194                                                 ACPI_BITPOSITION_SCI_ENABLE,
 195                                                 ACPI_BITMASK_SCI_ENABLE},
 196         /* ACPI_BITREG_BUS_MASTER_RLD       */ {ACPI_REGISTER_PM1_CONTROL,
 197                                                 ACPI_BITPOSITION_BUS_MASTER_RLD,
 198                                                 ACPI_BITMASK_BUS_MASTER_RLD},
 199         /* ACPI_BITREG_GLOBAL_LOCK_RELEASE  */ {ACPI_REGISTER_PM1_CONTROL,
 200                                                 ACPI_BITPOSITION_GLOBAL_LOCK_RELEASE,
 201                                                 ACPI_BITMASK_GLOBAL_LOCK_RELEASE},
 202         /* ACPI_BITREG_SLEEP_TYPE           */ {ACPI_REGISTER_PM1_CONTROL,
 203                                                 ACPI_BITPOSITION_SLEEP_TYPE,
 204                                                 ACPI_BITMASK_SLEEP_TYPE},
 205         /* ACPI_BITREG_SLEEP_ENABLE         */ {ACPI_REGISTER_PM1_CONTROL,
 206                                                 ACPI_BITPOSITION_SLEEP_ENABLE,
 207                                                 ACPI_BITMASK_SLEEP_ENABLE},
 208
 209         /* ACPI_BITREG_ARB_DIS              */ {ACPI_REGISTER_PM2_CONTROL,
 210                                                 ACPI_BITPOSITION_ARB_DISABLE,
 211                                                 ACPI_BITMASK_ARB_DISABLE}
 212 };
 213
 214 struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] = {
 215         /* ACPI_EVENT_PMTIMER       */ {ACPI_BITREG_TIMER_STATUS,
 216                                         ACPI_BITREG_TIMER_ENABLE,
 217                                         ACPI_BITMASK_TIMER_STATUS,
 218                                         ACPI_BITMASK_TIMER_ENABLE},
 219         /* ACPI_EVENT_GLOBAL        */ {ACPI_BITREG_GLOBAL_LOCK_STATUS,
 220                                         ACPI_BITREG_GLOBAL_LOCK_ENABLE,
 221                                         ACPI_BITMASK_GLOBAL_LOCK_STATUS,
 222                                         ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
 223         /* ACPI_EVENT_POWER_BUTTON  */ {ACPI_BITREG_POWER_BUTTON_STATUS,
 224                                         ACPI_BITREG_POWER_BUTTON_ENABLE,
 225                                         ACPI_BITMASK_POWER_BUTTON_STATUS,
 226                                         ACPI_BITMASK_POWER_BUTTON_ENABLE},
 227         /* ACPI_EVENT_SLEEP_BUTTON  */ {ACPI_BITREG_SLEEP_BUTTON_STATUS,
 228                                         ACPI_BITREG_SLEEP_BUTTON_ENABLE,
 229                                         ACPI_BITMASK_SLEEP_BUTTON_STATUS,
 230                                         ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
 231         /* ACPI_EVENT_RTC           */ {ACPI_BITREG_RT_CLOCK_STATUS,
 232                                         ACPI_BITREG_RT_CLOCK_ENABLE,
 233                                         ACPI_BITMASK_RT_CLOCK_STATUS,
 234                                         ACPI_BITMASK_RT_CLOCK_ENABLE},
 235 };
 236 #endif                          /* !ACPI_REDUCED_HARDWARE */
 237
 238 /*******************************************************************************
 239  *
 240  * FUNCTION:    acpi_ut_init_globals
 241  *
 242  * PARAMETERS:  None
 243  *
 244  * RETURN:      Status
 245  *
 246  * DESCRIPTION: Initialize ACPICA globals. All globals that require specific
 247  *              initialization should be initialized here. This allows for
 248  *              a warm restart.
 249  *
 250  ******************************************************************************/
 251
 252 acpi_status acpi_ut_init_globals(void)
 253 {
 254         acpi_status status;
 255         u32 i;
 256
 257         ACPI_FUNCTION_TRACE(ut_init_globals);
 258
 259         /* Create all memory caches */
 260
 261         status = acpi_ut_create_caches();
 262         if (ACPI_FAILURE(status)) {
 263                 return_ACPI_STATUS(status);
 264         }
 265
 266         /* Address Range lists */
 267
 268         for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
 269                 acpi_gbl_address_range_list[i] = NULL;
 270         }
 271
 272         /* Mutex locked flags */
 273
 274         for (i = 0; i < ACPI_NUM_MUTEX; i++) {
 275                 acpi_gbl_mutex_info[i].mutex = NULL;
 276                 acpi_gbl_mutex_info[i].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
 277                 acpi_gbl_mutex_info[i].use_count = 0;
 278         }
 279
 280         for (i = 0; i < ACPI_NUM_OWNERID_MASKS; i++) {
 281                 acpi_gbl_owner_id_mask[i] = 0;
 282         }
 283
 284         /* Last owner_ID is never valid */
 285
 286         acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;
 287
 288         /* Event counters */
 289
 290         acpi_method_count = 0;
 291         acpi_sci_count = 0;
 292         acpi_gpe_count = 0;
 293
 294         for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
 295                 acpi_fixed_event_count[i] = 0;
 296         }
 297
 298 #if (!ACPI_REDUCED_HARDWARE)
 299
 300         /* GPE/SCI support */
 301
 302         acpi_gbl_all_gpes_initialized = FALSE;
 303         acpi_gbl_gpe_xrupt_list_head = NULL;
 304         acpi_gbl_gpe_fadt_blocks[0] = NULL;
 305         acpi_gbl_gpe_fadt_blocks[1] = NULL;
 306         acpi_current_gpe_count = 0;
 307
 308         acpi_gbl_global_event_handler = NULL;
 309         acpi_gbl_sci_handler_list = NULL;
 310
 311 #endif                          /* !ACPI_REDUCED_HARDWARE */
 312
 313         /* Global handlers */
 314
 315         acpi_gbl_global_notify[0].handler = NULL;
 316         acpi_gbl_global_notify[1].handler = NULL;
 317         acpi_gbl_exception_handler = NULL;
 318         acpi_gbl_init_handler = NULL;
 319         acpi_gbl_table_handler = NULL;
 320         acpi_gbl_interface_handler = NULL;
 321
 322         /* Global Lock support */
 323
 324         acpi_gbl_global_lock_semaphore = NULL;
 325         acpi_gbl_global_lock_mutex = NULL;
 326         acpi_gbl_global_lock_acquired = FALSE;
 327         acpi_gbl_global_lock_handle = 0;
 328         acpi_gbl_global_lock_present = FALSE;
 329
 330         /* Miscellaneous variables */
 331
 332         acpi_gbl_DSDT = NULL;
 333         acpi_gbl_cm_single_step = FALSE;
 334         acpi_gbl_shutdown = FALSE;
 335         acpi_gbl_ns_lookup_count = 0;
 336         acpi_gbl_ps_find_count = 0;
 337         acpi_gbl_acpi_hardware_present = TRUE;
 338         acpi_gbl_last_owner_id_index = 0;
 339         acpi_gbl_next_owner_id_offset = 0;
 340         acpi_gbl_trace_method_name = 0;
 341         acpi_gbl_trace_dbg_level = 0;
 342         acpi_gbl_trace_dbg_layer = 0;
 343         acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
 344         acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
 345         acpi_gbl_osi_mutex = NULL;
 346         acpi_gbl_reg_methods_executed = FALSE;
 347
 348         /* Hardware oriented */
 349
 350         acpi_gbl_events_initialized = FALSE;
 351         acpi_gbl_system_awake_and_running = TRUE;
 352
 353         /* Namespace */
 354
 355         acpi_gbl_module_code_list = NULL;
 356         acpi_gbl_root_node = NULL;
 357         acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
 358         acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
 359         acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
 360         acpi_gbl_root_node_struct.parent = NULL;
 361         acpi_gbl_root_node_struct.child = NULL;
 362         acpi_gbl_root_node_struct.peer = NULL;
 363         acpi_gbl_root_node_struct.object = NULL;
 364
 365 #ifdef ACPI_DISASSEMBLER
 366         acpi_gbl_external_list = NULL;
 367         acpi_gbl_num_external_methods = 0;
 368         acpi_gbl_resolved_external_methods = 0;
 369 #endif
 370
 371 #ifdef ACPI_DEBUG_OUTPUT
 372         acpi_gbl_lowest_stack_pointer = ACPI_CAST_PTR(acpi_size, ACPI_SIZE_MAX);
 373 #endif
 374
 375 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 376         acpi_gbl_display_final_mem_stats = FALSE;
 377         acpi_gbl_disable_mem_tracking = FALSE;
 378 #endif
 379
 380 #ifdef ACPI_DEBUGGER
 381         acpi_gbl_db_terminate_threads = FALSE;
 382 #endif
 383
 384         return_ACPI_STATUS(AE_OK);
 385 }
 386
 387 /* Public globals */
 388
 389 ACPI_EXPORT_SYMBOL(acpi_gbl_FADT)
 390 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
 391 ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
 392 ACPI_EXPORT_SYMBOL(acpi_gpe_count)
 393 ACPI_EXPORT_SYMBOL(acpi_current_gpe_count)