| Start/ | End/ | |||
| True | False | - | Line | Source |
| 1 | /****************************************************************************** | |||
| 2 | * | |||
| 3 | * Module Name: evmisc - Miscellaneous event manager support functions | |||
| 4 | * | |||
| 5 | *****************************************************************************/ | |||
| 6 | ||||
| 7 | /* | |||
| 8 | * Copyright (C) 2000 - 2006, R. Byron Moore | |||
| 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 | #include <acpi/acpi.h> | |||
| 45 | #include <acpi/acevents.h> | |||
| 46 | #include <acpi/acnamesp.h> | |||
| 47 | #include <acpi/acinterp.h> | |||
| 48 | ||||
| 49 | #define _COMPONENT ACPI_EVENTS | |||
| 50 | ACPI_MODULE_NAME("evmisc") | |||
| 51 | ||||
| 52 | #ifdef ACPI_DEBUG_OUTPUT | |||
| 53 | static const char *acpi_notify_value_names[] = { | |||
| 54 | "Bus Check", | |||
| 55 | "Device Check", | |||
| 56 | "Device Wake", | |||
| 57 | "Eject request", | |||
| 58 | "Device Check Light", | |||
| 59 | "Frequency Mismatch", | |||
| 60 | "Bus Mode Mismatch", | |||
| 61 | "Power Fault" | |||
| 62 | }; | |||
| 63 | #endif | |||
| 64 | ||||
| 65 | /* Local prototypes */ | |||
| 66 | ||||
| 67 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); | |||
| 68 | ||||
| 69 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context); | |||
| 70 | ||||
| 71 | static u32 acpi_ev_global_lock_handler(void *context); | |||
| 72 | ||||
| 73 | /******************************************************************************* | |||
| 74 | * | |||
| 75 | * FUNCTION: acpi_ev_is_notify_object | |||
| 76 | * | |||
| 77 | * PARAMETERS: Node - Node to check | |||
| 78 | * | |||
| 79 | * RETURN: TRUE if notifies allowed on this object | |||
| 80 | * | |||
| 81 | * DESCRIPTION: Check type of node for a object that supports notifies. | |||
| 82 | * | |||
| 83 | * TBD: This could be replaced by a flag bit in the node. | |||
| 84 | * | |||
| 85 | ******************************************************************************/ | |||
| 86 | ||||
| 574 | 0 | 87 | u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) | |
| 88 | { | |||
| 89 | switch (node->type) { | |||
| 562 | 90 | case ACPI_TYPE_DEVICE: | ||
| 6 | 91 | case ACPI_TYPE_PROCESSOR: | ||
| 0 | - | 92 | case ACPI_TYPE_POWER: | |
| 6 | 93 | case ACPI_TYPE_THERMAL: | ||
| 94 | /* | |||
| 95 | * These are the ONLY objects that can receive ACPI notifications | |||
| 96 | */ | |||
| 574 | 97 | return (TRUE); | ||
| 98 | ||||
| 0 | - | 99 | default: | |
| 0 | - | 100 | return (FALSE); | |
| 101 | } | |||
| 102 | } | |||
| 103 | ||||
| 104 | /******************************************************************************* | |||
| 105 | * | |||
| 106 | * FUNCTION: acpi_ev_queue_notify_request | |||
| 107 | * | |||
| 108 | * PARAMETERS: Node - NS node for the notified object | |||
| 109 | * notify_value - Value from the Notify() request | |||
| 110 | * | |||
| 111 | * RETURN: Status | |||
| 112 | * | |||
| 113 | * DESCRIPTION: Dispatch a device notification event to a previously | |||
| 114 | * installed handler. | |||
| 115 | * | |||
| 116 | ******************************************************************************/ | |||
| 117 | ||||
| 118 | acpi_status | |||
| 508 | 0 | 119 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, | |
| 120 | u32 notify_value) | |||
| 121 | { | |||
| 122 | union acpi_operand_object *obj_desc; | |||
| 123 | union acpi_operand_object *handler_obj = NULL; | |||
| 124 | union acpi_generic_state *notify_info; | |||
| 125 | acpi_status status = AE_OK; | |||
| 126 | ||||
| 127 | ACPI_FUNCTION_NAME("ev_queue_notify_request"); | |||
| 128 | ||||
| 129 | /* | |||
| 130 | * For value 3 (Ejection Request), some device method may need to be run. | |||
| 131 | * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need | |||
| 132 | * to be run. | |||
| 133 | * For value 0x80 (Status Change) on the power button or sleep button, | |||
| 134 | * initiate soft-off or sleep operation? | |||
| 135 | */ | |||
| 136 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |||
| 137 | "Dispatching Notify(%X) on node %p\n", notify_value, | |||
| 138 | node)); | |||
| 139 | ||||
| 0 | 508 | - | 140 | if (notify_value <= 7) { |
| 141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notify value: %s\n", | |||
| 142 | acpi_notify_value_names[notify_value])); | |||
| 143 | } else { | |||
| 144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |||
| 145 | "Notify value: 0x%2.2X **Device Specific**\n", | |||
| 146 | notify_value)); | |||
| 147 | } | |||
| 148 | ||||
| 149 | /* Get the notify object attached to the NS Node */ | |||
| 150 | ||||
| 151 | obj_desc = acpi_ns_get_attached_object(node); | |||
| 506 | 2 | 152 | if (obj_desc) { | |
| 153 | /* We have the notify object, Get the right handler */ | |||
| 154 | ||||
| 155 | switch (node->type) { | |||
| 506 | 156 | case ACPI_TYPE_DEVICE: | ||
| 0 | - | 157 | case ACPI_TYPE_THERMAL: | |
| 0 | - | 158 | case ACPI_TYPE_PROCESSOR: | |
| 0 | - | 159 | case ACPI_TYPE_POWER: | |
| 160 | ||||
| 0 | 506 | - | 161 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { |
| 162 | handler_obj = | |||
| 163 | obj_desc->common_notify.system_notify; | |||
| 164 | } else { | |||
| 165 | handler_obj = | |||
| 166 | obj_desc->common_notify.device_notify; | |||
| 167 | } | |||
| 506 | 168 | break; | ||
| 169 | ||||
| 0 | - | 170 | default: | |
| 171 | /* All other types are not supported */ | |||
| 0 | - | 172 | return (AE_TYPE); | |
| 173 | } | |||
| 174 | } | |||
| 175 | ||||
| 176 | /* If there is any handler to run, schedule the dispatcher */ | |||
| 177 | ||||
| 178 | if ((acpi_gbl_system_notify.handler | |||
| 179 | && (notify_value <= ACPI_MAX_SYS_NOTIFY)) | |||
| 180 | || (acpi_gbl_device_notify.handler | |||
| 506 | 2 | 181 | && (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { | |
| 0 | - | 181 | (T && (T)) || (_ && (_)) || _ | |
| 0 | - | 181 | (T && (F)) || (T && (T)) || _ | |
| 0 | - | 181 | (T && (F)) || (T && (F)) || T | |
| 506 | 181 | (T && (F)) || (F && (_)) || T | ||
| 0 | - | 181 | (F && (_)) || (T && (T)) || _ | |
| 0 | - | 181 | (F && (_)) || (T && (F)) || T | |
| 0 | - | 181 | (F && (_)) || (F && (_)) || T | |
| 0 | - | 181 | (T && (F)) || (T && (F)) || F | |
| 2 | 181 | (T && (F)) || (F && (_)) || F | ||
| 0 | - | 181 | (F && (_)) || (T && (F)) || F | |
| 0 | - | 181 | (F && (_)) || (F && (_)) || F | |
| 182 | notify_info = acpi_ut_create_generic_state(); | |||
| 0 | 506 | - | 183 | if (!notify_info) { |
| 0 | - | 184 | return (AE_NO_MEMORY); | |
| 185 | } | |||
| 186 | ||||
| 187 | notify_info->common.data_type = ACPI_DESC_TYPE_STATE_NOTIFY; | |||
| 188 | notify_info->notify.node = node; | |||
| 189 | notify_info->notify.value = (u16) notify_value; | |||
| 190 | notify_info->notify.handler_obj = handler_obj; | |||
| 191 | ||||
| 192 | status = acpi_os_queue_for_execution(OSD_PRIORITY_HIGH, | |||
| 193 | acpi_ev_notify_dispatch, | |||
| 194 | notify_info); | |||
| 0 | 506 | - | 195 | if (ACPI_FAILURE(status)) { |
| 196 | acpi_ut_delete_generic_state(notify_info); | |||
| 197 | } | |||
| 198 | } | |||
| 199 | ||||
| 2 | 506 | 200 | if (!handler_obj) { | |
| 201 | /* | |||
| 202 | * There is no per-device notify handler for this device. | |||
| 203 | * This may or may not be a problem. | |||
| 204 | */ | |||
| 205 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |||
| 206 | "No notify handler for Notify(%4.4s, %X) node %p\n", | |||
| 207 | acpi_ut_get_node_name(node), notify_value, | |||
| 208 | node)); | |||
| 209 | } | |||
| 210 | ||||
| 508 | 211 | return (status); | ||
| 212 | } | |||
| 213 | ||||
| 214 | /******************************************************************************* | |||
| 215 | * | |||
| 216 | * FUNCTION: acpi_ev_notify_dispatch | |||
| 217 | * | |||
| 218 | * PARAMETERS: Context - To be passed to the notify handler | |||
| 219 | * | |||
| 220 | * RETURN: None. | |||
| 221 | * | |||
| 222 | * DESCRIPTION: Dispatch a device notification event to a previously | |||
| 223 | * installed handler. | |||
| 224 | * | |||
| 225 | ******************************************************************************/ | |||
| 226 | ||||
| 506 | 506 | 227 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) | |
| 228 | { | |||
| 229 | union acpi_generic_state *notify_info = | |||
| 230 | (union acpi_generic_state *)context; | |||
| 231 | acpi_notify_handler global_handler = NULL; | |||
| 232 | void *global_context = NULL; | |||
| 233 | union acpi_operand_object *handler_obj; | |||
| 234 | ||||
| 235 | ACPI_FUNCTION_ENTRY(); | |||
| 236 | ||||
| 237 | /* | |||
| 238 | * We will invoke a global notify handler if installed. | |||
| 239 | * This is done _before_ we invoke the per-device handler attached | |||
| 240 | * to the device. | |||
| 241 | */ | |||
| 0 | 506 | - | 242 | if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { |
| 243 | /* Global system notification handler */ | |||
| 244 | ||||
| 0 | 0 | - | 245 | if (acpi_gbl_system_notify.handler) { |
| 246 | global_handler = acpi_gbl_system_notify.handler; | |||
| 247 | global_context = acpi_gbl_system_notify.context; | |||
| 248 | } | |||
| 249 | } else { | |||
| 250 | /* Global driver notification handler */ | |||
| 251 | ||||
| 0 | 506 | - | 252 | if (acpi_gbl_device_notify.handler) { |
| 253 | global_handler = acpi_gbl_device_notify.handler; | |||
| 254 | global_context = acpi_gbl_device_notify.context; | |||
| 255 | } | |||
| 256 | } | |||
| 257 | ||||
| 258 | /* Invoke the system handler first, if present */ | |||
| 259 | ||||
| 0 | 506 | - | 260 | if (global_handler) { |
| 261 | global_handler(notify_info->notify.node, | |||
| 262 | notify_info->notify.value, global_context); | |||
| 263 | } | |||
| 264 | ||||
| 265 | /* Now invoke the per-device handler, if present */ | |||
| 266 | ||||
| 267 | handler_obj = notify_info->notify.handler_obj; | |||
| 506 | 0 | - | 268 | if (handler_obj) { |
| 269 | handler_obj->notify.handler(notify_info->notify.node, | |||
| 270 | notify_info->notify.value, | |||
| 271 | handler_obj->notify.context); | |||
| 272 | } | |||
| 273 | ||||
| 274 | /* All done with the info object */ | |||
| 275 | ||||
| 276 | acpi_ut_delete_generic_state(notify_info); | |||
| 277 | } | |||
| 278 | ||||
| 279 | /******************************************************************************* | |||
| 280 | * | |||
| 281 | * FUNCTION: acpi_ev_global_lock_thread | |||
| 282 | * | |||
| 283 | * PARAMETERS: Context - From thread interface, not used | |||
| 284 | * | |||
| 285 | * RETURN: None | |||
| 286 | * | |||
| 287 | * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the | |||
| 288 | * Global Lock. Simply signal all threads that are waiting | |||
| 289 | * for the lock. | |||
| 290 | * | |||
| 291 | ******************************************************************************/ | |||
| 292 | ||||
| 0 | 0 | - | 293 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context) |
| 294 | { | |||
| 295 | acpi_status status; | |||
| 296 | ||||
| 297 | /* Signal threads that are waiting for the lock */ | |||
| 298 | ||||
| 0 | 0 | - | 299 | if (acpi_gbl_global_lock_thread_count) { |
| 300 | /* Send sufficient units to the semaphore */ | |||
| 301 | ||||
| 302 | status = | |||
| 303 | acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, | |||
| 304 | acpi_gbl_global_lock_thread_count); | |||
| 0 | 0 | - | 305 | if (ACPI_FAILURE(status)) { |
| 306 | ACPI_ERROR((AE_INFO, | |||
| 307 | "Could not signal Global Lock semaphore")); | |||
| 308 | } | |||
| 309 | } | |||
| 310 | } | |||
| 311 | ||||
| 312 | /******************************************************************************* | |||
| 313 | * | |||
| 314 | * FUNCTION: acpi_ev_global_lock_handler | |||
| 315 | * | |||
| 316 | * PARAMETERS: Context - From thread interface, not used | |||
| 317 | * | |||
| 318 | * RETURN: ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED | |||
| 319 | * | |||
| 320 | * DESCRIPTION: Invoked directly from the SCI handler when a global lock | |||
| 321 | * release interrupt occurs. Grab the global lock and queue | |||
| 322 | * the global lock thread for execution | |||
| 323 | * | |||
| 324 | ******************************************************************************/ | |||
| 325 | ||||
| 0 | 0 | - | 326 | static u32 acpi_ev_global_lock_handler(void *context) |
| 327 | { | |||
| 328 | u8 acquired = FALSE; | |||
| 329 | acpi_status status; | |||
| 330 | ||||
| 331 | /* | |||
| 332 | * Attempt to get the lock | |||
| 333 | * If we don't get it now, it will be marked pending and we will | |||
| 334 | * take another interrupt when it becomes free. | |||
| 335 | */ | |||
| 336 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); | |||
| 0 | 0 | - | 337 | if (acquired) { |
| 338 | /* Got the lock, now wake all threads waiting for it */ | |||
| 339 | ||||
| 340 | acpi_gbl_global_lock_acquired = TRUE; | |||
| 341 | ||||
| 342 | /* Run the Global Lock thread which will signal all waiting threads */ | |||
| 343 | ||||
| 344 | status = acpi_os_queue_for_execution(OSD_PRIORITY_HIGH, | |||
| 345 | acpi_ev_global_lock_thread, | |||
| 346 | context); | |||
| 0 | 0 | - | 347 | if (ACPI_FAILURE(status)) { |
| 348 | ACPI_EXCEPTION((AE_INFO, status, | |||
| 349 | "Could not queue Global Lock thread")); | |||
| 350 | ||||
| 0 | - | 351 | return (ACPI_INTERRUPT_NOT_HANDLED); | |
| 352 | } | |||
| 353 | } | |||
| 354 | ||||
| 0 | - | 355 | return (ACPI_INTERRUPT_HANDLED); | |
| 356 | } | |||
| 357 | ||||
| 358 | /******************************************************************************* | |||
| 359 | * | |||
| 360 | * FUNCTION: acpi_ev_init_global_lock_handler | |||
| 361 | * | |||
| 362 | * PARAMETERS: None | |||
| 363 | * | |||
| 364 | * RETURN: Status | |||
| 365 | * | |||
| 366 | * DESCRIPTION: Install a handler for the global lock release event | |||
| 367 | * | |||
| 368 | ******************************************************************************/ | |||
| 369 | ||||
| 6 | 0 | 370 | acpi_status acpi_ev_init_global_lock_handler(void) | |
| 371 | { | |||
| 372 | acpi_status status; | |||
| 373 | ||||
| 374 | ACPI_FUNCTION_TRACE("ev_init_global_lock_handler"); | |||
| 375 | ||||
| 376 | acpi_gbl_global_lock_present = TRUE; | |||
| 377 | status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, | |||
| 378 | acpi_ev_global_lock_handler, | |||
| 379 | NULL); | |||
| 380 | ||||
| 381 | /* | |||
| 382 | * If the global lock does not exist on this platform, the attempt | |||
| 383 | * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick) | |||
| 384 | * Map to AE_OK, but mark global lock as not present. | |||
| 385 | * Any attempt to actually use the global lock will be flagged | |||
| 386 | * with an error. | |||
| 387 | */ | |||
| 0 | 6 | - | 388 | if (status == AE_NO_HARDWARE_RESPONSE) { |
| 389 | ACPI_ERROR((AE_INFO, | |||
| 390 | "No response from Global Lock hardware, disabling lock")); | |||
| 391 | ||||
| 392 | acpi_gbl_global_lock_present = FALSE; | |||
| 393 | status = AE_OK; | |||
| 394 | } | |||
| 395 | ||||
| 6 | 396 | return_ACPI_STATUS(status); | ||
| 397 | } | |||
| 398 | ||||
| 399 | /****************************************************************************** | |||
| 400 | * | |||
| 401 | * FUNCTION: acpi_ev_acquire_global_lock | |||
| 402 | * | |||
| 403 | * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. | |||
| 404 | * | |||
| 405 | * RETURN: Status | |||
| 406 | * | |||
| 407 | * DESCRIPTION: Attempt to gain ownership of the Global Lock. | |||
| 408 | * | |||
| 409 | *****************************************************************************/ | |||
| 410 | ||||
| 63632 | 0 | 411 | acpi_status acpi_ev_acquire_global_lock(u16 timeout) | |
| 412 | { | |||
| 413 | acpi_status status = AE_OK; | |||
| 414 | u8 acquired = FALSE; | |||
| 415 | ||||
| 416 | ACPI_FUNCTION_TRACE("ev_acquire_global_lock"); | |||
| 417 | ||||
| 418 | #ifndef ACPI_APPLICATION | |||
| 419 | /* Make sure that we actually have a global lock */ | |||
| 420 | ||||
| 0 | 63632 | - | 421 | if (!acpi_gbl_global_lock_present) { |
| 0 | - | 422 | return_ACPI_STATUS(AE_NO_GLOBAL_LOCK); | |
| 423 | } | |||
| 424 | #endif | |||
| 425 | ||||
| 426 | /* One more thread wants the global lock */ | |||
| 427 | ||||
| 428 | acpi_gbl_global_lock_thread_count++; | |||
| 429 | ||||
| 430 | /* | |||
| 431 | * If we (OS side vs. BIOS side) have the hardware lock already, | |||
| 432 | * we are done | |||
| 433 | */ | |||
| 0 | 63632 | - | 434 | if (acpi_gbl_global_lock_acquired) { |
| 0 | - | 435 | return_ACPI_STATUS(AE_OK); | |
| 436 | } | |||
| 437 | ||||
| 438 | /* We must acquire the actual hardware lock */ | |||
| 439 | ||||
| 440 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); | |||
| 63632 | 0 | - | 441 | if (acquired) { |
| 442 | /* We got the lock */ | |||
| 443 | ||||
| 444 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |||
| 445 | "Acquired the HW Global Lock\n")); | |||
| 446 | ||||
| 447 | acpi_gbl_global_lock_acquired = TRUE; | |||
| 63632 | 448 | return_ACPI_STATUS(AE_OK); | ||
| 449 | } | |||
| 450 | ||||
| 451 | /* | |||
| 452 | * Did not get the lock. The pending bit was set above, and we must now | |||
| 453 | * wait until we get the global lock released interrupt. | |||
| 454 | */ | |||
| 455 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n")); | |||
| 456 | ||||
| 457 | /* | |||
| 458 | * Acquire the global lock semaphore first. | |||
| 459 | * Since this wait will block, we must release the interpreter | |||
| 460 | */ | |||
| 461 | status = acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore, | |||
| 462 | timeout); | |||
| 0 | - | 463 | return_ACPI_STATUS(status); | |
| 464 | } | |||
| 465 | ||||
| 466 | /******************************************************************************* | |||
| 467 | * | |||
| 468 | * FUNCTION: acpi_ev_release_global_lock | |||
| 469 | * | |||
| 470 | * PARAMETERS: None | |||
| 471 | * | |||
| 472 | * RETURN: Status | |||
| 473 | * | |||
| 474 | * DESCRIPTION: Releases ownership of the Global Lock. | |||
| 475 | * | |||
| 476 | ******************************************************************************/ | |||
| 477 | ||||
| 63632 | 0 | 478 | acpi_status acpi_ev_release_global_lock(void) | |
| 479 | { | |||
| 480 | u8 pending = FALSE; | |||
| 481 | acpi_status status = AE_OK; | |||
| 482 | ||||
| 483 | ACPI_FUNCTION_TRACE("ev_release_global_lock"); | |||
| 484 | ||||
| 0 | 63632 | - | 485 | if (!acpi_gbl_global_lock_thread_count) { |
| 486 | ACPI_WARNING((AE_INFO, | |||
| 487 | "Cannot release HW Global Lock, it has not been acquired")); | |||
| 0 | - | 488 | return_ACPI_STATUS(AE_NOT_ACQUIRED); | |
| 489 | } | |||
| 490 | ||||
| 491 | /* One fewer thread has the global lock */ | |||
| 492 | ||||
| 493 | acpi_gbl_global_lock_thread_count--; | |||
| 0 | 63632 | - | 494 | if (acpi_gbl_global_lock_thread_count) { |
| 495 | /* There are still some threads holding the lock, cannot release */ | |||
| 496 | ||||
| 0 | - | 497 | return_ACPI_STATUS(AE_OK); | |
| 498 | } | |||
| 499 | ||||
| 500 | /* | |||
| 501 | * No more threads holding lock, we can do the actual hardware | |||
| 502 | * release | |||
| 503 | */ | |||
| 504 | ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, pending); | |||
| 505 | acpi_gbl_global_lock_acquired = FALSE; | |||
| 506 | ||||
| 507 | /* | |||
| 508 | * If the pending bit was set, we must write GBL_RLS to the control | |||
| 509 | * register | |||
| 510 | */ | |||
| 0 | 63632 | - | 511 | if (pending) { |
| 512 | status = acpi_set_register(ACPI_BITREG_GLOBAL_LOCK_RELEASE, | |||
| 513 | 1, ACPI_MTX_LOCK); | |||
| 514 | } | |||
| 515 | ||||
| 63632 | 516 | return_ACPI_STATUS(status); | ||
| 517 | } | |||
| 518 | ||||
| 519 | /****************************************************************************** | |||
| 520 | * | |||
| 521 | * FUNCTION: acpi_ev_terminate | |||
| 522 | * | |||
| 523 | * PARAMETERS: none | |||
| 524 | * | |||
| 525 | * RETURN: none | |||
| 526 | * | |||
| 527 | * DESCRIPTION: Disable events and free memory allocated for table storage. | |||
| 528 | * | |||
| 529 | ******************************************************************************/ | |||
| 530 | ||||
| 0 | 0 | - | 531 | void acpi_ev_terminate(void) |
| 532 | { | |||
| 533 | acpi_native_uint i; | |||
| 534 | acpi_status status; | |||
| 535 | ||||
| 536 | ACPI_FUNCTION_TRACE("ev_terminate"); | |||
| 537 | ||||
| 0 | 0 | - | 538 | if (acpi_gbl_events_initialized) { |
| 539 | /* | |||
| 540 | * Disable all event-related functionality. | |||
| 541 | * In all cases, on error, print a message but obviously we don't abort. | |||
| 542 | */ | |||
| 543 | ||||
| 544 | /* Disable all fixed events */ | |||
| 545 | ||||
| 0 | 0 | - | 546 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
| 547 | status = acpi_disable_event((u32) i, 0); | |||
| 0 | 0 | - | 548 | if (ACPI_FAILURE(status)) { |
| 549 | ACPI_ERROR((AE_INFO, | |||
| 550 | "Could not disable fixed event %d", | |||
| 551 | (u32) i)); | |||
| 552 | } | |||
| 553 | } | |||
| 554 | ||||
| 555 | /* Disable all GPEs in& | |||