/****************************************************************************** * * Module Name: evgpe - General Purpose Event handling and dispatch * xRevision: 5 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * *****************************************************************************/ #include __KERNEL_RCSID(0, "$NetBSD: evgpe.c,v 1.3 2003/02/13 14:16:19 kanaoka Exp $"); #include "acpi.h" #include "acevents.h" #include "acnamesp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME ("evgpe") /******************************************************************************* * * FUNCTION: AcpiEvGpeInitialize * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Initialize the GPE data structures * ******************************************************************************/ ACPI_STATUS AcpiEvGpeInitialize (void) { ACPI_NATIVE_UINT i; ACPI_NATIVE_UINT j; UINT32 GpeBlock; UINT32 GpeRegister; UINT32 GpeNumberIndex; UINT32 GpeNumber; ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvGpeInitialize"); /* * Initialize the GPE Block globals * * Why the GPE register block lengths are divided by 2: From the ACPI Spec, * section "General-Purpose Event Registers", we have: * * "Each register block contains two registers of equal length * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN * The length of the GPE1_STS and GPE1_EN registers is equal to * half the GPE1_LEN. If a generic register block is not supported * then its respective block pointer and block length values in the * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need * to be the same size." */ AcpiGbl_GpeBlockInfo[0].RegisterCount = 0; AcpiGbl_GpeBlockInfo[1].RegisterCount = 0; AcpiGbl_GpeBlockInfo[0].BlockAddress = &AcpiGbl_FADT->XGpe0Blk; AcpiGbl_GpeBlockInfo[1].BlockAddress = &AcpiGbl_FADT->XGpe1Blk; AcpiGbl_GpeBlockInfo[0].BlockBaseNumber = 0; AcpiGbl_GpeBlockInfo[1].BlockBaseNumber = AcpiGbl_FADT->Gpe1Base; /* * Determine the maximum GPE number for this machine. * * Note: both GPE0 and GPE1 are optional, and either can exist without * the other. * If EITHER the register length OR the block address are zero, then that * particular block is not supported. */ if (AcpiGbl_FADT->XGpe0Blk.RegisterBitWidth && ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address)) { /* GPE block 0 exists (has both length and address > 0) */ AcpiGbl_GpeBlockInfo[0].RegisterCount = (UINT16) (AcpiGbl_FADT->XGpe0Blk.RegisterBitWidth / (ACPI_GPE_REGISTER_WIDTH * 2)); AcpiGbl_GpeNumberMax = (AcpiGbl_GpeBlockInfo[0].RegisterCount * ACPI_GPE_REGISTER_WIDTH) - 1; } if (AcpiGbl_FADT->XGpe1Blk.RegisterBitWidth && ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address)) { /* GPE block 1 exists (has both length and address > 0) */ AcpiGbl_GpeBlockInfo[1].RegisterCount = (UINT16) (AcpiGbl_FADT->XGpe1Blk.RegisterBitWidth / (ACPI_GPE_REGISTER_WIDTH * 2)); /* Check for GPE0/GPE1 overlap (if both banks exist) */ if ((AcpiGbl_GpeBlockInfo[0].RegisterCount) && (AcpiGbl_GpeNumberMax >= AcpiGbl_FADT->Gpe1Base)) { ACPI_REPORT_ERROR (( "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1\n", AcpiGbl_GpeNumberMax, AcpiGbl_FADT->Gpe1Base, AcpiGbl_FADT->Gpe1Base + ((AcpiGbl_GpeBlockInfo[1].RegisterCount * ACPI_GPE_REGISTER_WIDTH) - 1))); /* Ignore GPE1 block by setting the register count to zero */ AcpiGbl_GpeBlockInfo[1].RegisterCount = 0; } else { /* * GPE0 and GPE1 do not have to be contiguous in the GPE number space, * But, GPE0 always starts at zero. */ AcpiGbl_GpeNumberMax = AcpiGbl_FADT->Gpe1Base + ((AcpiGbl_GpeBlockInfo[1].RegisterCount * ACPI_GPE_REGISTER_WIDTH) - 1); } } /* Exit if there are no GPE registers */ AcpiGbl_GpeRegisterCount = AcpiGbl_GpeBlockInfo[0].RegisterCount + AcpiGbl_GpeBlockInfo[1].RegisterCount; if (!AcpiGbl_GpeRegisterCount) { /* GPEs are not required by ACPI, this is OK */ ACPI_REPORT_INFO (("There are no GPE blocks defined in the FADT\n")); return_ACPI_STATUS (AE_OK); } /* Check for Max GPE number out-of-range */ if (AcpiGbl_GpeNumberMax > ACPI_GPE_MAX) { ACPI_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n", AcpiGbl_GpeNumberMax)); return_ACPI_STATUS (AE_BAD_VALUE); } /* Allocate the GPE number-to-index translation table */ AcpiGbl_GpeNumberToIndex = ACPI_MEM_CALLOCATE ( sizeof (ACPI_GPE_INDEX_INFO) * ((ACPI_SIZE) AcpiGbl_GpeNumberMax + 1)); if (!AcpiGbl_GpeNumberToIndex) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the GpeNumberToIndex table\n")); return_ACPI_STATUS (AE_NO_MEMORY); } /* Set the Gpe index table to GPE_INVALID */ ACPI_MEMSET (AcpiGbl_GpeNumberToIndex, (int) ACPI_GPE_INVALID, sizeof (ACPI_GPE_INDEX_INFO) * ((ACPI_SIZE) AcpiGbl_GpeNumberMax + 1)); /* Allocate the GPE register information block */ AcpiGbl_GpeRegisterInfo = ACPI_MEM_CALLOCATE ( (ACPI_SIZE) AcpiGbl_GpeRegisterCount * sizeof (ACPI_GPE_REGISTER_INFO)); if (!AcpiGbl_GpeRegisterInfo) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the GpeRegisterInfo table\n")); goto ErrorExit1; } /* * Allocate the GPE dispatch handler block. There are eight distinct GPEs * per register. Initialization to zeros is sufficient. */ AcpiGbl_GpeNumberInfo = ACPI_MEM_CALLOCATE ( ((ACPI_SIZE) AcpiGbl_GpeRegisterCount * ACPI_GPE_REGISTER_WIDTH) * sizeof (ACPI_GPE_NUMBER_INFO)); if (!AcpiGbl_GpeNumberInfo) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the GpeNumberInfo table\n")); goto ErrorExit2; } /* * Initialize the GPE information and validation tables. A goal of these * tables is to hide the fact that there are two separate GPE register sets * in a given gpe hardware block, the status registers occupy the first half, * and the enable registers occupy the second half. Another goal is to hide * the fact that there may be multiple GPE hardware blocks. */ GpeRegister = 0; GpeNumberIndex = 0; for (GpeBlock = 0; GpeBlock < ACPI_MAX_GPE_BLOCKS; GpeBlock++) { for (i = 0; i < AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount; i++) { GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[GpeRegister]; /* Init the Register info for this entire GPE register (8 GPEs) */ GpeRegisterInfo->BaseGpeNumber = (UINT8) (AcpiGbl_GpeBlockInfo[GpeBlock].BlockBaseNumber + (i * ACPI_GPE_REGISTER_WIDTH)); ACPI_STORE_ADDRESS (GpeRegisterInfo->StatusAddress.Address, (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address) + i)); ACPI_STORE_ADDRESS (GpeRegisterInfo->EnableAddress.Address, (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address) + i + AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount)); GpeRegisterInfo->StatusAddress.AddressSpaceId = AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->AddressSpaceId; GpeRegisterInfo->EnableAddress.AddressSpaceId = AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->AddressSpaceId; GpeRegisterInfo->StatusAddress.RegisterBitWidth = ACPI_GPE_REGISTER_WIDTH; GpeRegisterInfo->EnableAddress.RegisterBitWidth = ACPI_GPE_REGISTER_WIDTH; GpeRegisterInfo->StatusAddress.RegisterBitOffset = ACPI_GPE_REGISTER_WIDTH; GpeRegisterInfo->EnableAddress.RegisterBitOffset = ACPI_GPE_REGISTER_WIDTH; /* Init the Index mapping info for each GPE number within this register */ for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { GpeNumber = GpeRegisterInfo->BaseGpeNumber + (UINT32) j; AcpiGbl_GpeNumberToIndex[GpeNumber].NumberIndex = (UINT8) GpeNumberIndex; AcpiGbl_GpeNumberInfo[GpeNumberIndex].BitMask = AcpiGbl_DecodeTo8bit[j]; GpeNumberIndex++; } /* * Clear the status/enable registers. Note that status registers * are cleared by writing a '1', while enable registers are cleared * by writing a '0'. */ Status = AcpiHwLowLevelWrite (ACPI_GPE_REGISTER_WIDTH, 0x00, &GpeRegisterInfo->EnableAddress, 0); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiHwLowLevelWrite (ACPI_GPE_REGISTER_WIDTH, 0xFF, &GpeRegisterInfo->StatusAddress, 0); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } GpeRegister++; } if (i) { /* Dump info about this valid GPE block */ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "GPE Block%d: %X registers at %8.8X%8.8X\n", (INT32) GpeBlock, AcpiGbl_GpeBlockInfo[0].RegisterCount, ACPI_HIDWORD (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address)), ACPI_LODWORD (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address)))); ACPI_REPORT_INFO (("GPE Block%d defined as GPE%d to GPE%d\n", (INT32) GpeBlock, (UINT32) AcpiGbl_GpeBlockInfo[GpeBlock].BlockBaseNumber, (UINT32) (AcpiGbl_GpeBlockInfo[GpeBlock].BlockBaseNumber + ((AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount * ACPI_GPE_REGISTER_WIDTH) -1)))); } } return_ACPI_STATUS (AE_OK); /* Error cleanup */ ErrorExit2: ACPI_MEM_FREE (AcpiGbl_GpeRegisterInfo); ErrorExit1: ACPI_MEM_FREE (AcpiGbl_GpeNumberToIndex); return_ACPI_STATUS (AE_NO_MEMORY); } /******************************************************************************* * * FUNCTION: AcpiEvSaveMethodInfo * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a * control method under the _GPE portion of the namespace. * Extract the name and GPE type from the object, saving this * information for quick lookup during GPE dispatch * * The name of each GPE control method is of the form: * "_Lnn" or "_Enn" * Where: * L - means that the GPE is level triggered * E - means that the GPE is edge triggered * nn - is the GPE number [in HEX] * ******************************************************************************/ static ACPI_STATUS AcpiEvSaveMethodInfo ( ACPI_HANDLE ObjHandle, UINT32 Level, void *ObjDesc, void **ReturnValue) { UINT32 GpeNumber; UINT32 GpeNumberIndex; char Name[ACPI_NAME_SIZE + 1]; UINT8 Type; ACPI_STATUS Status; ACPI_FUNCTION_NAME ("EvSaveMethodInfo"); /* Extract the name from the object and convert to a string */ ACPI_MOVE_UNALIGNED32_TO_32 (Name, &((ACPI_NAMESPACE_NODE *) ObjHandle)->Name.Integer); Name[ACPI_NAME_SIZE] = 0; /* * Edge/Level determination is based on the 2nd character of the method name */ switch (Name[1]) { case 'L': Type = ACPI_EVENT_LEVEL_TRIGGERED; break; case 'E': Type = ACPI_EVENT_EDGE_TRIGGERED; break; default: /* Unknown method type, just ignore it! */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown GPE method type: %s (name not of form _Lnn or _Enn)\n", Name)); return (AE_OK); } /* Convert the last two characters of the name to the GPE Number */ GpeNumber = ACPI_STRTOUL (&Name[2], NULL, 16); if (GpeNumber == ACPI_UINT32_MAX) { /* Conversion failed; invalid method, just ignore it */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not extract GPE number from name: %s (name not of form _Lnn or _Enn)\n", Name)); return (AE_OK); } /* Get GPE index and ensure that we have a valid GPE number */ GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber); if (GpeNumberIndex == ACPI_GPE_INVALID) { /* Not valid, all we can do here is ignore it */ return (AE_OK); } /* * Now we can add this information to the GpeInfo block * for use during dispatch of this GPE. */ AcpiGbl_GpeNumberInfo [GpeNumberIndex].Type = Type; AcpiGbl_GpeNumberInfo [GpeNumberIndex].MethodNode = (ACPI_NAMESPACE_NODE *) ObjHandle; /* * Enable the GPE (SCIs should be disabled at this point) */ Status = AcpiHwEnableGpe (GpeNumber); if (ACPI_FAILURE (Status)) { return (Status); } ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Registered GPE method %s as GPE number %2.2X\n", Name, GpeNumber)); return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvInitGpeControlMethods * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Obtain the control methods associated with the GPEs. * NOTE: Must be called AFTER namespace initialization! * ******************************************************************************/ ACPI_STATUS AcpiEvInitGpeControlMethods (void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvInitGpeControlMethods"); /* Get a permanent handle to the _GPE object */ Status = AcpiGetHandle (NULL, "\\_GPE", &AcpiGbl_GpeObjHandle); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Traverse the namespace under \_GPE to find all methods there */ Status = AcpiWalkNamespace (ACPI_TYPE_METHOD, AcpiGbl_GpeObjHandle, ACPI_UINT32_MAX, AcpiEvSaveMethodInfo, NULL, NULL); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvGpeDetect * * PARAMETERS: None * * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED * * DESCRIPTION: Detect if any GP events have occurred. This function is * executed at interrupt level. * ******************************************************************************/ UINT32 AcpiEvGpeDetect (void) { UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; UINT32 i; UINT32 j; UINT8 EnabledStatusByte; UINT8 BitMask; ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; UINT32 InValue; ACPI_STATUS Status; ACPI_FUNCTION_NAME ("EvGpeDetect"); /* * Read all of the 8-bit GPE status and enable registers * in both of the register blocks, saving all of it. * Find all currently active GP events. */ for (i = 0; i < AcpiGbl_GpeRegisterCount; i++) { GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[i]; Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue, &GpeRegisterInfo->StatusAddress, 0); GpeRegisterInfo->Status = (UINT8) InValue; if (ACPI_FAILURE (Status)) { return (ACPI_INTERRUPT_NOT_HANDLED); } Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue, &GpeRegisterInfo->EnableAddress, 0); GpeRegisterInfo->Enable = (UINT8) InValue; if (ACPI_FAILURE (Status)) { return (ACPI_INTERRUPT_NOT_HANDLED); } ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, "GPE block at %8.8X%8.8X - Values: Enable %02X Status %02X\n", ACPI_HIDWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)), ACPI_LODWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)), GpeRegisterInfo->Enable, GpeRegisterInfo->Status)); /* First check if there is anything active at all in this register */ EnabledStatusByte = (UINT8) (GpeRegisterInfo->Status & GpeRegisterInfo->Enable); if (!EnabledStatusByte) { /* No active GPEs in this register, move on */ continue; } /* Now look at the individual GPEs in this byte register */ for (j = 0, BitMask = 1; j < ACPI_GPE_REGISTER_WIDTH; j++, BitMask <<= 1) { /* Examine one GPE bit */ if (EnabledStatusByte & BitMask) { /* * Found an active GPE. Dispatch the event to a handler * or method. */ IntStatus |= AcpiEvGpeDispatch ( GpeRegisterInfo->BaseGpeNumber + j); } } } return (IntStatus); } /******************************************************************************* * * FUNCTION: AcpiEvAsynchExecuteGpeMethod * * PARAMETERS: GpeNumber - The 0-based GPE number * * RETURN: None * * DESCRIPTION: Perform the actual execution of a GPE control method. This * function is called from an invocation of AcpiOsQueueForExecution * (and therefore does NOT execute at interrupt level) so that * the control method itself is not executed in the context of * the SCI interrupt handler. * ******************************************************************************/ static void ACPI_SYSTEM_XFACE AcpiEvAsynchExecuteGpeMethod ( void *Context) { UINT32 GpeNumber = (UINT32) ACPI_TO_INTEGER (Context); UINT32 GpeNumberIndex; ACPI_GPE_NUMBER_INFO GpeInfo; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod"); GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber); if (GpeNumberIndex == ACPI_GPE_INVALID) { return_VOID; } /* * Take a snapshot of the GPE info for this level - we copy the * info to prevent a race condition with RemoveHandler. */ Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_VOID; } GpeInfo = AcpiGbl_GpeNumberInfo [GpeNumberIndex]; Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_VOID; } if (GpeInfo.MethodNode) { /* * Invoke the GPE Method (_Lxx, _Exx): * (Evaluate the _Lxx/_Exx control method that corresponds to this GPE.) */ Status = AcpiNsEvaluateByHandle (GpeInfo.MethodNode, NULL, NULL); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (("%s while evaluating method [%4.4s] for GPE[%2.2X]\n", AcpiFormatException (Status), GpeInfo.MethodNode->Name.Ascii, GpeNumber)); } } if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED) { /* * GPE is level-triggered, we clear the GPE status bit after handling * the event. */ Status = AcpiHwClearGpe (GpeNumber); if (ACPI_FAILURE (Status)) { return_VOID; } } /* * Enable the GPE. */ (void) AcpiHwEnableGpe (GpeNumber); return_VOID; } /******************************************************************************* * * FUNCTION: AcpiEvGpeDispatch * * PARAMETERS: GpeNumber - The 0-based GPE number * * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED * * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) * or method (e.g. _Lxx/_Exx) handler. This function executes * at interrupt level. * ******************************************************************************/ UINT32 AcpiEvGpeDispatch ( UINT32 GpeNumber) { UINT32 GpeNumberIndex; ACPI_GPE_NUMBER_INFO *GpeInfo; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvGpeDispatch"); GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber); if (GpeNumberIndex == ACPI_GPE_INVALID) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "GPE[%X] is not a valid event\n", GpeNumber)); return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); } /* * We don't have to worry about mutex on GpeInfo because we are * executing at interrupt level. */ GpeInfo = &AcpiGbl_GpeNumberInfo [GpeNumberIndex]; /* * If edge-triggered, clear the GPE status bit now. Note that * level-triggered events are cleared after the GPE is serviced. */ if (GpeInfo->Type & ACPI_EVENT_EDGE_TRIGGERED) { Status = AcpiHwClearGpe (GpeNumber); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2.2X]\n", GpeNumber)); return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); } } /* * Dispatch the GPE to either an installed handler, or the control * method associated with this GPE (_Lxx or _Exx). * If a handler exists, we invoke it and do not attempt to run the method. * If there is neither a handler nor a method, we disable the level to * prevent further events from coming in here. */ if (GpeInfo->Handler) { /* Invoke the installed handler (at interrupt level) */ GpeInfo->Handler (GpeInfo->Context); } else if (GpeInfo->MethodNode) { /* * Disable GPE, so it doesn't keep firing before the method has a * chance to run. */ Status = AcpiHwDisableGpe (GpeNumber); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%2.2X]\n", GpeNumber)); return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); } /* * Execute the method associated with the GPE. */ if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE, AcpiEvAsynchExecuteGpeMethod, ACPI_TO_POINTER (GpeNumber)))) { ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to queue handler for GPE[%2.2X], event is disabled\n", GpeNumber)); } } else { /* No handler or method to run! */ ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: No handler or method for GPE[%2.2X], disabling event\n", GpeNumber)); /* * Disable the GPE. The GPE will remain disabled until the ACPI * Core Subsystem is restarted, or the handler is reinstalled. */ Status = AcpiHwDisableGpe (GpeNumber); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%2.2X]\n", GpeNumber)); return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); } } /* * It is now safe to clear level-triggered evnets. */ if (GpeInfo->Type & ACPI_EVENT_LEVEL_TRIGGERED) { Status = AcpiHwClearGpe (GpeNumber); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2.2X]\n", GpeNumber)); return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); } } return_VALUE (ACPI_INTERRUPT_HANDLED); }