1 /******************************************************************************
3 * Module Name: evgpe - General Purpose Event handling and dispatch
6 *****************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
118 #include "acevents.h"
119 #include "acnamesp.h"
121 #define _COMPONENT ACPI_EVENTS
122 ACPI_MODULE_NAME ("evgpe")
125 /*******************************************************************************
127 * FUNCTION: AcpiEvGetGpeEventInfo
129 * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
130 * GpeNumber - Raw GPE number
132 * RETURN: A GPE EventInfo struct. NULL if not a valid GPE
134 * DESCRIPTION: Returns the EventInfo struct associated with this GPE.
135 * Validates the GpeBlock and the GpeNumber
137 * Should be called only when the GPE lists are semaphore locked
138 * and not subject to change.
140 ******************************************************************************/
142 ACPI_GPE_EVENT_INFO *
143 AcpiEvGetGpeEventInfo (
144 ACPI_HANDLE GpeDevice,
147 ACPI_OPERAND_OBJECT *ObjDesc;
148 ACPI_GPE_BLOCK_INFO *GpeBlock;
152 ACPI_FUNCTION_ENTRY ();
155 /* A NULL GpeBlock means use the FADT-defined GPE block(s) */
159 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
161 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++)
163 GpeBlock = AcpiGbl_GpeFadtBlocks[i];
166 if ((GpeNumber >= GpeBlock->BlockBaseNumber) &&
167 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))
169 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]);
174 /* The GpeNumber was not in the range of either FADT GPE block */
180 * A Non-null GpeDevice means this is a GPE Block Device.
182 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice);
184 !ObjDesc->Device.GpeBlock)
189 GpeBlock = ObjDesc->Device.GpeBlock;
191 if ((GpeNumber >= GpeBlock->BlockBaseNumber) &&
192 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))
194 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]);
201 /*******************************************************************************
203 * FUNCTION: AcpiEvGpeDetect
205 * PARAMETERS: GpeXruptList - Interrupt block for this interrupt.
206 * Can have multiple GPE blocks attached.
208 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
210 * DESCRIPTION: Detect if any GP events have occurred. This function is
211 * executed at interrupt level.
213 ******************************************************************************/
217 ACPI_GPE_XRUPT_INFO *GpeXruptList)
219 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
220 UINT8 EnabledStatusByte;
221 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
224 ACPI_GPE_BLOCK_INFO *GpeBlock;
229 ACPI_FUNCTION_NAME ("EvGpeDetect");
232 /* Examine all GPE blocks attached to this interrupt level */
234 AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_ISR);
235 GpeBlock = GpeXruptList->GpeBlockListHead;
239 * Read all of the 8-bit GPE status and enable registers
240 * in this GPE block, saving all of them.
241 * Find all currently active GP events.
243 for (i = 0; i < GpeBlock->RegisterCount; i++)
245 /* Get the next status/enable pair */
247 GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
249 /* Read the Status Register */
251 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue,
252 &GpeRegisterInfo->StatusAddress);
253 GpeRegisterInfo->Status = (UINT8) InValue;
254 if (ACPI_FAILURE (Status))
259 /* Read the Enable Register */
261 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue,
262 &GpeRegisterInfo->EnableAddress);
263 GpeRegisterInfo->Enable = (UINT8) InValue;
264 if (ACPI_FAILURE (Status))
269 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
270 "GPE pair: Status %8.8X%8.8X = %02X, Enable %8.8X%8.8X = %02X\n",
271 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (GpeRegisterInfo->StatusAddress.Address)),
272 GpeRegisterInfo->Status,
273 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)),
274 GpeRegisterInfo->Enable));
276 /* First check if there is anything active at all in this register */
278 EnabledStatusByte = (UINT8) (GpeRegisterInfo->Status &
279 GpeRegisterInfo->Enable);
280 if (!EnabledStatusByte)
282 /* No active GPEs in this register, move on */
287 /* Now look at the individual GPEs in this byte register */
289 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
291 /* Examine one GPE bit */
293 if (EnabledStatusByte & AcpiGbl_DecodeTo8bit[j])
296 * Found an active GPE. Dispatch the event to a handler
299 IntStatus |= AcpiEvGpeDispatch (
300 &GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) + j],
301 j + GpeRegisterInfo->BaseGpeNumber);
306 GpeBlock = GpeBlock->Next;
311 AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_ISR);
316 /*******************************************************************************
318 * FUNCTION: AcpiEvAsynchExecuteGpeMethod
320 * PARAMETERS: Context (GpeEventInfo) - Info for this GPE
324 * DESCRIPTION: Perform the actual execution of a GPE control method. This
325 * function is called from an invocation of AcpiOsQueueForExecution
326 * (and therefore does NOT execute at interrupt level) so that
327 * the control method itself is not executed in the context of
328 * an interrupt handler.
330 ******************************************************************************/
332 static void ACPI_SYSTEM_XFACE
333 AcpiEvAsynchExecuteGpeMethod (
336 ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context;
337 UINT32 GpeNumber = 0;
339 ACPI_GPE_EVENT_INFO LocalGpeEventInfo;
342 ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod");
345 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
346 if (ACPI_FAILURE (Status))
351 /* Must revalidate the GpeNumber/GpeBlock */
353 if (!AcpiEvValidGpeEvent (GpeEventInfo))
355 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
360 * Take a snapshot of the GPE info for this level - we copy the
361 * info to prevent a race condition with RemoveHandler/RemoveBlock.
363 ACPI_MEMCPY (&LocalGpeEventInfo, GpeEventInfo, sizeof (ACPI_GPE_EVENT_INFO));
365 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
366 if (ACPI_FAILURE (Status))
371 if (LocalGpeEventInfo.MethodNode)
374 * Invoke the GPE Method (_Lxx, _Exx):
375 * (Evaluate the _Lxx/_Exx control method that corresponds to this GPE.)
377 Status = AcpiNsEvaluateByHandle (LocalGpeEventInfo.MethodNode, NULL, NULL);
378 if (ACPI_FAILURE (Status))
380 ACPI_REPORT_ERROR (("%s while evaluating method [%4.4s] for GPE[%2X]\n",
381 AcpiFormatException (Status),
382 AcpiUtGetNodeName (LocalGpeEventInfo.MethodNode), GpeNumber));
386 if (LocalGpeEventInfo.Flags & ACPI_EVENT_LEVEL_TRIGGERED)
389 * GPE is level-triggered, we clear the GPE status bit after handling
392 Status = AcpiHwClearGpe (&LocalGpeEventInfo);
393 if (ACPI_FAILURE (Status))
399 /* Enable this GPE */
401 (void) AcpiHwEnableGpe (&LocalGpeEventInfo);
406 /*******************************************************************************
408 * FUNCTION: AcpiEvGpeDispatch
410 * PARAMETERS: GpeEventInfo - info for this GPE
411 * GpeNumber - Number relative to the parent GPE block
413 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
415 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
416 * or method (e.g. _Lxx/_Exx) handler.
418 * This function executes at interrupt level.
420 ******************************************************************************/
424 ACPI_GPE_EVENT_INFO *GpeEventInfo,
430 ACPI_FUNCTION_TRACE ("EvGpeDispatch");
434 * If edge-triggered, clear the GPE status bit now. Note that
435 * level-triggered events are cleared after the GPE is serviced.
437 if (GpeEventInfo->Flags & ACPI_EVENT_EDGE_TRIGGERED)
439 Status = AcpiHwClearGpe (GpeEventInfo);
440 if (ACPI_FAILURE (Status))
442 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2X]\n",
444 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
449 * Dispatch the GPE to either an installed handler, or the control
450 * method associated with this GPE (_Lxx or _Exx).
451 * If a handler exists, we invoke it and do not attempt to run the method.
452 * If there is neither a handler nor a method, we disable the level to
453 * prevent further events from coming in here.
455 if (GpeEventInfo->Handler)
457 /* Invoke the installed handler (at interrupt level) */
459 GpeEventInfo->Handler (GpeEventInfo->Context);
461 /* It is now safe to clear level-triggered events. */
463 if (GpeEventInfo->Flags & ACPI_EVENT_LEVEL_TRIGGERED)
465 Status = AcpiHwClearGpe (GpeEventInfo);
466 if (ACPI_FAILURE (Status))
469 "AcpiEvGpeDispatch: Unable to clear GPE[%2X]\n",
471 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
475 else if (GpeEventInfo->MethodNode)
478 * Disable GPE, so it doesn't keep firing before the method has a
481 Status = AcpiHwDisableGpe (GpeEventInfo);
482 if (ACPI_FAILURE (Status))
485 "AcpiEvGpeDispatch: Unable to disable GPE[%2X]\n",
487 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
491 * Execute the method associated with the GPE
492 * NOTE: Level-triggered GPEs are cleared after the method completes.
494 if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE,
495 AcpiEvAsynchExecuteGpeMethod,
499 "AcpiEvGpeDispatch: Unable to queue handler for GPE[%2X], event is disabled\n",
505 /* No handler or method to run! */
508 "AcpiEvGpeDispatch: No handler or method for GPE[%2X], disabling event\n",
512 * Disable the GPE. The GPE will remain disabled until the ACPI
513 * Core Subsystem is restarted, or a handler is installed.
515 Status = AcpiHwDisableGpe (GpeEventInfo);
516 if (ACPI_FAILURE (Status))
519 "AcpiEvGpeDispatch: Unable to disable GPE[%2X]\n",
521 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
525 return_VALUE (ACPI_INTERRUPT_HANDLED);