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 *****************************************************************************/
116 /* $DragonFly: src/sys/contrib/dev/acpica/Attic/evgpe.c,v 1.1 2003/09/24 03:32:15 drhodus Exp $ */
119 #include "acevents.h"
120 #include "acnamesp.h"
122 #define _COMPONENT ACPI_EVENTS
123 ACPI_MODULE_NAME ("evgpe")
126 /*******************************************************************************
128 * FUNCTION: AcpiEvGetGpeEventInfo
130 * PARAMETERS: GpeNumber - Raw GPE number
134 * DESCRIPTION: Returns the EventInfo struct
135 * associated with this GPE.
137 * TBD: this function will go away when full support of GPE block devices
140 ******************************************************************************/
142 ACPI_GPE_EVENT_INFO *
143 AcpiEvGetGpeEventInfo (
146 ACPI_GPE_BLOCK_INFO *GpeBlock;
149 /* Examine GPE Block 0 */
151 GpeBlock = AcpiGbl_GpeBlockListHead;
157 if ((GpeNumber >= GpeBlock->BlockBaseNumber) &&
158 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))
160 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]);
163 /* Examine GPE Block 1 */
165 GpeBlock = GpeBlock->Next;
171 if ((GpeNumber >= GpeBlock->BlockBaseNumber) &&
172 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))
174 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]);
180 /*******************************************************************************
182 * FUNCTION: AcpiEvGpeDetect
186 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
188 * DESCRIPTION: Detect if any GP events have occurred. This function is
189 * executed at interrupt level.
191 ******************************************************************************/
194 AcpiEvGpeDetect (void)
196 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
199 UINT8 EnabledStatusByte;
201 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
204 ACPI_GPE_BLOCK_INFO *GpeBlock;
207 ACPI_FUNCTION_NAME ("EvGpeDetect");
210 /* Examine all GPE blocks attached to this interrupt level */
212 GpeBlock = AcpiGbl_GpeBlockListHead;
216 * Read all of the 8-bit GPE status and enable registers
217 * in this GPE block, saving all of them.
218 * Find all currently active GP events.
220 for (i = 0; i < GpeBlock->RegisterCount; i++)
222 /* Get the next status/enable pair */
224 GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
226 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue,
227 &GpeRegisterInfo->StatusAddress, 0);
228 GpeRegisterInfo->Status = (UINT8) InValue;
229 if (ACPI_FAILURE (Status))
231 return (ACPI_INTERRUPT_NOT_HANDLED);
234 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue,
235 &GpeRegisterInfo->EnableAddress, 0);
236 GpeRegisterInfo->Enable = (UINT8) InValue;
237 if (ACPI_FAILURE (Status))
239 return (ACPI_INTERRUPT_NOT_HANDLED);
242 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
243 "GPE block at %8.8X%8.8X - Values: Enable %02X Status %02X\n",
244 ACPI_HIDWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)),
245 ACPI_LODWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)),
246 GpeRegisterInfo->Enable,
247 GpeRegisterInfo->Status));
249 /* First check if there is anything active at all in this register */
251 EnabledStatusByte = (UINT8) (GpeRegisterInfo->Status &
252 GpeRegisterInfo->Enable);
253 if (!EnabledStatusByte)
255 /* No active GPEs in this register, move on */
260 /* Now look at the individual GPEs in this byte register */
262 for (j = 0, BitMask = 1; j < ACPI_GPE_REGISTER_WIDTH; j++, BitMask <<= 1)
264 /* Examine one GPE bit */
266 if (EnabledStatusByte & BitMask)
269 * Found an active GPE. Dispatch the event to a handler
272 IntStatus |= AcpiEvGpeDispatch (
273 &GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) +j]);
278 GpeBlock = GpeBlock->Next;
285 /*******************************************************************************
287 * FUNCTION: AcpiEvAsynchExecuteGpeMethod
289 * PARAMETERS: GpeEventInfo - Info for this GPE
293 * DESCRIPTION: Perform the actual execution of a GPE control method. This
294 * function is called from an invocation of AcpiOsQueueForExecution
295 * (and therefore does NOT execute at interrupt level) so that
296 * the control method itself is not executed in the context of
297 * the SCI interrupt handler.
299 ******************************************************************************/
301 static void ACPI_SYSTEM_XFACE
302 AcpiEvAsynchExecuteGpeMethod (
305 ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context;
306 UINT32 GpeNumber = 0;
310 ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod");
314 * Take a snapshot of the GPE info for this level - we copy the
315 * info to prevent a race condition with RemoveHandler.
317 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
318 if (ACPI_FAILURE (Status))
323 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
324 if (ACPI_FAILURE (Status))
329 if (GpeEventInfo->MethodNode)
332 * Invoke the GPE Method (_Lxx, _Exx):
333 * (Evaluate the _Lxx/_Exx control method that corresponds to this GPE.)
335 Status = AcpiNsEvaluateByHandle (GpeEventInfo->MethodNode, NULL, NULL);
336 if (ACPI_FAILURE (Status))
338 ACPI_REPORT_ERROR (("%s while evaluating method [%4.4s] for GPE[%2.2X]\n",
339 AcpiFormatException (Status),
340 GpeEventInfo->MethodNode->Name.Ascii, GpeNumber));
344 if (GpeEventInfo->Type & ACPI_EVENT_LEVEL_TRIGGERED)
347 * GPE is level-triggered, we clear the GPE status bit after handling
350 Status = AcpiHwClearGpe (GpeEventInfo);
351 if (ACPI_FAILURE (Status))
357 /* Enable this GPE */
359 (void) AcpiHwEnableGpe (GpeEventInfo);
364 /*******************************************************************************
366 * FUNCTION: AcpiEvGpeDispatch
368 * PARAMETERS: GpeEventInfo - info for this GPE
370 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
372 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
373 * or method (e.g. _Lxx/_Exx) handler. This function executes
374 * at interrupt level.
376 ******************************************************************************/
380 ACPI_GPE_EVENT_INFO *GpeEventInfo)
382 UINT32 GpeNumber = 0; /* TBD: remove */
386 ACPI_FUNCTION_TRACE ("EvGpeDispatch");
390 * If edge-triggered, clear the GPE status bit now. Note that
391 * level-triggered events are cleared after the GPE is serviced.
393 if (GpeEventInfo->Type & ACPI_EVENT_EDGE_TRIGGERED)
395 Status = AcpiHwClearGpe (GpeEventInfo);
396 if (ACPI_FAILURE (Status))
398 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2.2X]\n",
400 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
405 * Dispatch the GPE to either an installed handler, or the control
406 * method associated with this GPE (_Lxx or _Exx).
407 * If a handler exists, we invoke it and do not attempt to run the method.
408 * If there is neither a handler nor a method, we disable the level to
409 * prevent further events from coming in here.
411 if (GpeEventInfo->Handler)
413 /* Invoke the installed handler (at interrupt level) */
415 GpeEventInfo->Handler (GpeEventInfo->Context);
417 else if (GpeEventInfo->MethodNode)
420 * Disable GPE, so it doesn't keep firing before the method has a
423 Status = AcpiHwDisableGpe (GpeEventInfo);
424 if (ACPI_FAILURE (Status))
426 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%2.2X]\n",
428 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
432 * Execute the method associated with the GPE.
434 if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE,
435 AcpiEvAsynchExecuteGpeMethod,
439 "AcpiEvGpeDispatch: Unable to queue handler for GPE[%2.2X], event is disabled\n",
445 /* No handler or method to run! */
448 "AcpiEvGpeDispatch: No handler or method for GPE[%2.2X], disabling event\n",
452 * Disable the GPE. The GPE will remain disabled until the ACPI
453 * Core Subsystem is restarted, or the handler is reinstalled.
455 Status = AcpiHwDisableGpe (GpeEventInfo);
456 if (ACPI_FAILURE (Status))
458 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%2.2X]\n",
460 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
465 * It is now safe to clear level-triggered evnets.
467 if (GpeEventInfo->Type & ACPI_EVENT_LEVEL_TRIGGERED)
469 Status = AcpiHwClearGpe (GpeEventInfo);
470 if (ACPI_FAILURE (Status))
472 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2.2X]\n",
474 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
478 return_VALUE (ACPI_INTERRUPT_HANDLED);