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Warning, cross-references for /kernel/drivers/acpica/evevent.c need to be fixed.
0001 /****************************************************************************** 0002 * 0003 * Module Name: evevent - Fixed Event handling and dispatch 0004 * 0005 *****************************************************************************/ 0006 0007 /****************************************************************************** 0008 * 0009 * 1. Copyright Notice 0010 * 0011 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 0012 * All rights reserved. 0013 * 0014 * 2. License 0015 * 0016 * 2.1. This is your license from Intel Corp. under its intellectual property 0017 * rights. You may have additional license terms from the party that provided 0018 * you this software, covering your right to use that party's intellectual 0019 * property rights. 0020 * 0021 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 0022 * copy of the source code appearing in this file ("Covered Code") an 0023 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 0024 * base code distributed originally by Intel ("Original Intel Code") to copy, 0025 * make derivatives, distribute, use and display any portion of the Covered 0026 * Code in any form, with the right to sublicense such rights; and 0027 * 0028 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 0029 * license (with the right to sublicense), under only those claims of Intel 0030 * patents that are infringed by the Original Intel Code, to make, use, sell, 0031 * offer to sell, and import the Covered Code and derivative works thereof 0032 * solely to the minimum extent necessary to exercise the above copyright 0033 * license, and in no event shall the patent license extend to any additions 0034 * to or modifications of the Original Intel Code. No other license or right 0035 * is granted directly or by implication, estoppel or otherwise; 0036 * 0037 * The above copyright and patent license is granted only if the following 0038 * conditions are met: 0039 * 0040 * 3. Conditions 0041 * 0042 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 0043 * Redistribution of source code of any substantial portion of the Covered 0044 * Code or modification with rights to further distribute source must include 0045 * the above Copyright Notice, the above License, this list of Conditions, 0046 * and the following Disclaimer and Export Compliance provision. In addition, 0047 * Licensee must cause all Covered Code to which Licensee contributes to 0048 * contain a file documenting the changes Licensee made to create that Covered 0049 * Code and the date of any change. Licensee must include in that file the 0050 * documentation of any changes made by any predecessor Licensee. Licensee 0051 * must include a prominent statement that the modification is derived, 0052 * directly or indirectly, from Original Intel Code. 0053 * 0054 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 0055 * Redistribution of source code of any substantial portion of the Covered 0056 * Code or modification without rights to further distribute source must 0057 * include the following Disclaimer and Export Compliance provision in the 0058 * documentation and/or other materials provided with distribution. In 0059 * addition, Licensee may not authorize further sublicense of source of any 0060 * portion of the Covered Code, and must include terms to the effect that the 0061 * license from Licensee to its licensee is limited to the intellectual 0062 * property embodied in the software Licensee provides to its licensee, and 0063 * not to intellectual property embodied in modifications its licensee may 0064 * make. 0065 * 0066 * 3.3. Redistribution of Executable. Redistribution in executable form of any 0067 * substantial portion of the Covered Code or modification must reproduce the 0068 * above Copyright Notice, and the following Disclaimer and Export Compliance 0069 * provision in the documentation and/or other materials provided with the 0070 * distribution. 0071 * 0072 * 3.4. Intel retains all right, title, and interest in and to the Original 0073 * Intel Code. 0074 * 0075 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 0076 * Intel shall be used in advertising or otherwise to promote the sale, use or 0077 * other dealings in products derived from or relating to the Covered Code 0078 * without prior written authorization from Intel. 0079 * 0080 * 4. Disclaimer and Export Compliance 0081 * 0082 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 0083 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 0084 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 0085 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 0086 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 0087 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 0088 * PARTICULAR PURPOSE. 0089 * 0090 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 0091 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 0092 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 0093 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 0094 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 0095 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 0096 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 0097 * LIMITED REMEDY. 0098 * 0099 * 4.3. Licensee shall not export, either directly or indirectly, any of this 0100 * software or system incorporating such software without first obtaining any 0101 * required license or other approval from the U. S. Department of Commerce or 0102 * any other agency or department of the United States Government. In the 0103 * event Licensee exports any such software from the United States or 0104 * re-exports any such software from a foreign destination, Licensee shall 0105 * ensure that the distribution and export/re-export of the software is in 0106 * compliance with all laws, regulations, orders, or other restrictions of the 0107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 0108 * any of its subsidiaries will export/re-export any technical data, process, 0109 * software, or service, directly or indirectly, to any country for which the 0110 * United States government or any agency thereof requires an export license, 0111 * other governmental approval, or letter of assurance, without first obtaining 0112 * such license, approval or letter. 0113 * 0114 *****************************************************************************/ 0115 0116 #include "acpi.h" 0117 #include "accommon.h" 0118 #include "acevents.h" 0119 0120 #define _COMPONENT ACPI_EVENTS 0121 ACPI_MODULE_NAME ("evevent") 0122 0123 /* Local prototypes */ 0124 0125 static ACPI_STATUS 0126 AcpiEvFixedEventInitialize ( 0127 void); 0128 0129 static UINT32 0130 AcpiEvFixedEventDispatch ( 0131 UINT32 Event); 0132 0133 0134 /******************************************************************************* 0135 * 0136 * FUNCTION: AcpiEvInitializeEvents 0137 * 0138 * PARAMETERS: None 0139 * 0140 * RETURN: Status 0141 * 0142 * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) 0143 * 0144 ******************************************************************************/ 0145 0146 ACPI_STATUS 0147 AcpiEvInitializeEvents ( 0148 void) 0149 { 0150 ACPI_STATUS Status; 0151 0152 0153 ACPI_FUNCTION_TRACE (EvInitializeEvents); 0154 0155 0156 /* 0157 * Initialize the Fixed and General Purpose Events. This is done prior to 0158 * enabling SCIs to prevent interrupts from occurring before the handlers 0159 * are installed. 0160 */ 0161 Status = AcpiEvFixedEventInitialize (); 0162 if (ACPI_FAILURE (Status)) 0163 { 0164 ACPI_EXCEPTION ((AE_INFO, Status, 0165 "Unable to initialize fixed events")); 0166 return_ACPI_STATUS (Status); 0167 } 0168 0169 Status = AcpiEvGpeInitialize (); 0170 if (ACPI_FAILURE (Status)) 0171 { 0172 ACPI_EXCEPTION ((AE_INFO, Status, 0173 "Unable to initialize general purpose events")); 0174 return_ACPI_STATUS (Status); 0175 } 0176 0177 return_ACPI_STATUS (Status); 0178 } 0179 0180 0181 /******************************************************************************* 0182 * 0183 * FUNCTION: AcpiEvInstallFadtGpes 0184 * 0185 * PARAMETERS: None 0186 * 0187 * RETURN: Status 0188 * 0189 * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks 0190 * (0 and 1). This causes the _PRW methods to be run, so the HW 0191 * must be fully initialized at this point, including global lock 0192 * support. 0193 * 0194 ******************************************************************************/ 0195 0196 ACPI_STATUS 0197 AcpiEvInstallFadtGpes ( 0198 void) 0199 { 0200 ACPI_STATUS Status; 0201 0202 0203 ACPI_FUNCTION_TRACE (EvInstallFadtGpes); 0204 0205 0206 /* Namespace must be locked */ 0207 0208 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 0209 if (ACPI_FAILURE (Status)) 0210 { 0211 return (Status); 0212 } 0213 0214 /* FADT GPE Block 0 */ 0215 0216 (void) AcpiEvInitializeGpeBlock ( 0217 AcpiGbl_FadtGpeDevice, AcpiGbl_GpeFadtBlocks[0]); 0218 0219 /* FADT GPE Block 1 */ 0220 0221 (void) AcpiEvInitializeGpeBlock ( 0222 AcpiGbl_FadtGpeDevice, AcpiGbl_GpeFadtBlocks[1]); 0223 0224 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 0225 return_ACPI_STATUS (AE_OK); 0226 } 0227 0228 0229 /******************************************************************************* 0230 * 0231 * FUNCTION: AcpiEvInstallXruptHandlers 0232 * 0233 * PARAMETERS: None 0234 * 0235 * RETURN: Status 0236 * 0237 * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock 0238 * 0239 ******************************************************************************/ 0240 0241 ACPI_STATUS 0242 AcpiEvInstallXruptHandlers ( 0243 void) 0244 { 0245 ACPI_STATUS Status; 0246 0247 0248 ACPI_FUNCTION_TRACE (EvInstallXruptHandlers); 0249 0250 0251 /* Install the SCI handler */ 0252 0253 Status = AcpiEvInstallSciHandler (); 0254 if (ACPI_FAILURE (Status)) 0255 { 0256 ACPI_EXCEPTION ((AE_INFO, Status, 0257 "Unable to install System Control Interrupt handler")); 0258 return_ACPI_STATUS (Status); 0259 } 0260 0261 /* Install the handler for the Global Lock */ 0262 0263 Status = AcpiEvInitGlobalLockHandler (); 0264 if (ACPI_FAILURE (Status)) 0265 { 0266 ACPI_EXCEPTION ((AE_INFO, Status, 0267 "Unable to initialize Global Lock handler")); 0268 return_ACPI_STATUS (Status); 0269 } 0270 0271 AcpiGbl_EventsInitialized = TRUE; 0272 return_ACPI_STATUS (Status); 0273 } 0274 0275 0276 /******************************************************************************* 0277 * 0278 * FUNCTION: AcpiEvFixedEventInitialize 0279 * 0280 * PARAMETERS: None 0281 * 0282 * RETURN: Status 0283 * 0284 * DESCRIPTION: Install the fixed event handlers and disable all fixed events. 0285 * 0286 ******************************************************************************/ 0287 0288 static ACPI_STATUS 0289 AcpiEvFixedEventInitialize ( 0290 void) 0291 { 0292 UINT32 i; 0293 ACPI_STATUS Status; 0294 0295 0296 /* 0297 * Initialize the structure that keeps track of fixed event handlers and 0298 * enable the fixed events. 0299 */ 0300 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 0301 { 0302 AcpiGbl_FixedEventHandlers[i].Handler = NULL; 0303 AcpiGbl_FixedEventHandlers[i].Context = NULL; 0304 0305 /* Disable the fixed event */ 0306 0307 if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF) 0308 { 0309 Status = AcpiWriteBitRegister ( 0310 AcpiGbl_FixedEventInfo[i].EnableRegisterId, 0311 ACPI_DISABLE_EVENT); 0312 if (ACPI_FAILURE (Status)) 0313 { 0314 return (Status); 0315 } 0316 } 0317 } 0318 0319 return (AE_OK); 0320 } 0321 0322 0323 /******************************************************************************* 0324 * 0325 * FUNCTION: AcpiEvFixedEventDetect 0326 * 0327 * PARAMETERS: None 0328 * 0329 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 0330 * 0331 * DESCRIPTION: Checks the PM status register for active fixed events 0332 * 0333 ******************************************************************************/ 0334 0335 UINT32 0336 AcpiEvFixedEventDetect ( 0337 void) 0338 { 0339 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; 0340 UINT32 FixedStatus; 0341 UINT32 FixedEnable; 0342 UINT32 i; 0343 0344 0345 ACPI_FUNCTION_NAME (EvFixedEventDetect); 0346 0347 0348 /* 0349 * Read the fixed feature status and enable registers, as all the cases 0350 * depend on their values. Ignore errors here. 0351 */ 0352 (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus); 0353 (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable); 0354 0355 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, 0356 "Fixed Event Block: Enable %08X Status %08X\n", 0357 FixedEnable, FixedStatus)); 0358 0359 /* 0360 * Check for all possible Fixed Events and dispatch those that are active 0361 */ 0362 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 0363 { 0364 /* Both the status and enable bits must be on for this event */ 0365 0366 if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) && 0367 (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask)) 0368 { 0369 /* Found an active (signalled) event */ 0370 0371 AcpiFixedEventCount[i]++; 0372 IntStatus |= AcpiEvFixedEventDispatch (i); 0373 } 0374 } 0375 0376 return (IntStatus); 0377 } 0378 0379 0380 /******************************************************************************* 0381 * 0382 * FUNCTION: AcpiEvFixedEventDispatch 0383 * 0384 * PARAMETERS: Event - Event type 0385 * 0386 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 0387 * 0388 * DESCRIPTION: Clears the status bit for the requested event, calls the 0389 * handler that previously registered for the event. 0390 * 0391 ******************************************************************************/ 0392 0393 static UINT32 0394 AcpiEvFixedEventDispatch ( 0395 UINT32 Event) 0396 { 0397 0398 ACPI_FUNCTION_ENTRY (); 0399 0400 0401 /* Clear the status bit */ 0402 0403 (void) AcpiWriteBitRegister ( 0404 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 0405 ACPI_CLEAR_STATUS); 0406 0407 /* 0408 * Make sure we've got a handler. If not, report an error. The event is 0409 * disabled to prevent further interrupts. 0410 */ 0411 if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler) 0412 { 0413 (void) AcpiWriteBitRegister ( 0414 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 0415 ACPI_DISABLE_EVENT); 0416 0417 ACPI_ERROR ((AE_INFO, 0418 "No installed handler for fixed event [%08X]", 0419 Event)); 0420 0421 return (ACPI_INTERRUPT_NOT_HANDLED); 0422 } 0423 0424 /* Invoke the Fixed Event handler */ 0425 0426 return ((AcpiGbl_FixedEventHandlers[Event].Handler)( 0427 AcpiGbl_FixedEventHandlers[Event].Context)); 0428 } 0429 0430
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