1 /****************************************************************************** 2 * 3 * Module Name: evevent - Fixed Event handling and dispatch 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/acevents.h> 155 156 #define _COMPONENT ACPI_EVENTS 157 ACPI_MODULE_NAME ("evevent") 158 159 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ 160 161 /* Local prototypes */ 162 163 static ACPI_STATUS 164 AcpiEvFixedEventInitialize ( 165 void); 166 167 static UINT32 168 AcpiEvFixedEventDispatch ( 169 UINT32 Event); 170 171 172 /******************************************************************************* 173 * 174 * FUNCTION: AcpiEvInitializeEvents 175 * 176 * PARAMETERS: None 177 * 178 * RETURN: Status 179 * 180 * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) 181 * 182 ******************************************************************************/ 183 184 ACPI_STATUS 185 AcpiEvInitializeEvents ( 186 void) 187 { 188 ACPI_STATUS Status; 189 190 191 ACPI_FUNCTION_TRACE (EvInitializeEvents); 192 193 194 /* If Hardware Reduced flag is set, there are no fixed events */ 195 196 if (AcpiGbl_ReducedHardware) 197 { 198 return_ACPI_STATUS (AE_OK); 199 } 200 201 /* 202 * Initialize the Fixed and General Purpose Events. This is done prior to 203 * enabling SCIs to prevent interrupts from occurring before the handlers 204 * are installed. 205 */ 206 Status = AcpiEvFixedEventInitialize (); 207 if (ACPI_FAILURE (Status)) 208 { 209 ACPI_EXCEPTION ((AE_INFO, Status, 210 "Unable to initialize fixed events")); 211 return_ACPI_STATUS (Status); 212 } 213 214 Status = AcpiEvGpeInitialize (); 215 if (ACPI_FAILURE (Status)) 216 { 217 ACPI_EXCEPTION ((AE_INFO, Status, 218 "Unable to initialize general purpose events")); 219 return_ACPI_STATUS (Status); 220 } 221 222 return_ACPI_STATUS (Status); 223 } 224 225 226 /******************************************************************************* 227 * 228 * FUNCTION: AcpiEvInstallXruptHandlers 229 * 230 * PARAMETERS: None 231 * 232 * RETURN: Status 233 * 234 * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock 235 * 236 ******************************************************************************/ 237 238 ACPI_STATUS 239 AcpiEvInstallXruptHandlers ( 240 void) 241 { 242 ACPI_STATUS Status; 243 244 245 ACPI_FUNCTION_TRACE (EvInstallXruptHandlers); 246 247 248 /* If Hardware Reduced flag is set, there is no ACPI h/w */ 249 250 if (AcpiGbl_ReducedHardware) 251 { 252 return_ACPI_STATUS (AE_OK); 253 } 254 255 /* Install the SCI handler */ 256 257 Status = AcpiEvInstallSciHandler (); 258 if (ACPI_FAILURE (Status)) 259 { 260 ACPI_EXCEPTION ((AE_INFO, Status, 261 "Unable to install System Control Interrupt handler")); 262 return_ACPI_STATUS (Status); 263 } 264 265 /* Install the handler for the Global Lock */ 266 267 Status = AcpiEvInitGlobalLockHandler (); 268 if (ACPI_FAILURE (Status)) 269 { 270 ACPI_EXCEPTION ((AE_INFO, Status, 271 "Unable to initialize Global Lock handler")); 272 return_ACPI_STATUS (Status); 273 } 274 275 AcpiGbl_EventsInitialized = TRUE; 276 return_ACPI_STATUS (Status); 277 } 278 279 280 /******************************************************************************* 281 * 282 * FUNCTION: AcpiEvFixedEventInitialize 283 * 284 * PARAMETERS: None 285 * 286 * RETURN: Status 287 * 288 * DESCRIPTION: Install the fixed event handlers and disable all fixed events. 289 * 290 ******************************************************************************/ 291 292 static ACPI_STATUS 293 AcpiEvFixedEventInitialize ( 294 void) 295 { 296 UINT32 i; 297 ACPI_STATUS Status; 298 299 300 /* 301 * Initialize the structure that keeps track of fixed event handlers and 302 * disable all of the fixed events. 303 */ 304 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 305 { 306 AcpiGbl_FixedEventHandlers[i].Handler = NULL; 307 AcpiGbl_FixedEventHandlers[i].Context = NULL; 308 309 /* Disable the fixed event */ 310 311 if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF) 312 { 313 Status = AcpiWriteBitRegister ( 314 AcpiGbl_FixedEventInfo[i].EnableRegisterId, 315 ACPI_DISABLE_EVENT); 316 if (ACPI_FAILURE (Status)) 317 { 318 return (Status); 319 } 320 } 321 } 322 323 return (AE_OK); 324 } 325 326 327 /******************************************************************************* 328 * 329 * FUNCTION: AcpiEvFixedEventDetect 330 * 331 * PARAMETERS: None 332 * 333 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 334 * 335 * DESCRIPTION: Checks the PM status register for active fixed events 336 * 337 ******************************************************************************/ 338 339 UINT32 340 AcpiEvFixedEventDetect ( 341 void) 342 { 343 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; 344 UINT32 FixedStatus; 345 UINT32 FixedEnable; 346 UINT32 i; 347 ACPI_STATUS Status; 348 349 350 ACPI_FUNCTION_NAME (EvFixedEventDetect); 351 352 353 /* 354 * Read the fixed feature status and enable registers, as all the cases 355 * depend on their values. Ignore errors here. 356 */ 357 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus); 358 Status |= AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable); 359 if (ACPI_FAILURE (Status)) 360 { 361 return (IntStatus); 362 } 363 364 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, 365 "Fixed Event Block: Enable %08X Status %08X\n", 366 FixedEnable, FixedStatus)); 367 368 /* 369 * Check for all possible Fixed Events and dispatch those that are active 370 */ 371 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 372 { 373 /* Both the status and enable bits must be on for this event */ 374 375 if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) && 376 (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask)) 377 { 378 /* 379 * Found an active (signalled) event. Invoke global event 380 * handler if present. 381 */ 382 AcpiFixedEventCount[i]++; 383 if (AcpiGbl_GlobalEventHandler) 384 { 385 AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL, 386 i, AcpiGbl_GlobalEventHandlerContext); 387 } 388 389 IntStatus |= AcpiEvFixedEventDispatch (i); 390 } 391 } 392 393 return (IntStatus); 394 } 395 396 397 /******************************************************************************* 398 * 399 * FUNCTION: AcpiEvFixedEventDispatch 400 * 401 * PARAMETERS: Event - Event type 402 * 403 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 404 * 405 * DESCRIPTION: Clears the status bit for the requested event, calls the 406 * handler that previously registered for the event. 407 * NOTE: If there is no handler for the event, the event is 408 * disabled to prevent further interrupts. 409 * 410 ******************************************************************************/ 411 412 static UINT32 413 AcpiEvFixedEventDispatch ( 414 UINT32 Event) 415 { 416 417 ACPI_FUNCTION_ENTRY (); 418 419 420 /* Clear the status bit */ 421 422 (void) AcpiWriteBitRegister ( 423 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 424 ACPI_CLEAR_STATUS); 425 426 /* 427 * Make sure that a handler exists. If not, report an error 428 * and disable the event to prevent further interrupts. 429 */ 430 if (!AcpiGbl_FixedEventHandlers[Event].Handler) 431 { 432 (void) AcpiWriteBitRegister ( 433 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 434 ACPI_DISABLE_EVENT); 435 436 ACPI_ERROR ((AE_INFO, 437 "No installed handler for fixed event - %s (%u), disabling", 438 AcpiUtGetEventName (Event), Event)); 439 440 return (ACPI_INTERRUPT_NOT_HANDLED); 441 } 442 443 /* Invoke the Fixed Event handler */ 444 445 return ((AcpiGbl_FixedEventHandlers[Event].Handler)( 446 AcpiGbl_FixedEventHandlers[Event].Context)); 447 } 448 449 #endif /* !ACPI_REDUCED_HARDWARE */ 450