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Diffstat (limited to 'sys/contrib/dev/acpica/evgpe.c')
| -rw-r--r-- | sys/contrib/dev/acpica/evgpe.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/evgpe.c b/sys/contrib/dev/acpica/evgpe.c new file mode 100644 index 0000000..e470eae --- /dev/null +++ b/sys/contrib/dev/acpica/evgpe.c @@ -0,0 +1,850 @@ +/****************************************************************************** + * + * Module Name: evgpe - General Purpose Event handling and dispatch + * $Revision: 1.68 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, 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 <contrib/dev/acpica/acpi.h> +#include <contrib/dev/acpica/acevents.h> +#include <contrib/dev/acpica/acnamesp.h> + +#define _COMPONENT ACPI_EVENTS + ACPI_MODULE_NAME ("evgpe") + +/* Local prototypes */ + +static void ACPI_SYSTEM_XFACE +AcpiEvAsynchExecuteGpeMethod ( + void *Context); + + +/******************************************************************************* + * + * FUNCTION: AcpiEvSetGpeType + * + * PARAMETERS: GpeEventInfo - GPE to set + * Type - New type + * + * RETURN: Status + * + * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvSetGpeType ( + ACPI_GPE_EVENT_INFO *GpeEventInfo, + UINT8 Type) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (EvSetGpeType); + + + /* Validate type and update register enable masks */ + + switch (Type) + { + case ACPI_GPE_TYPE_WAKE: + case ACPI_GPE_TYPE_RUNTIME: + case ACPI_GPE_TYPE_WAKE_RUN: + break; + + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* Disable the GPE if currently enabled */ + + Status = AcpiEvDisableGpe (GpeEventInfo); + + /* Type was validated above */ + + GpeEventInfo->Flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ + GpeEventInfo->Flags |= Type; /* Insert type */ + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvUpdateGpeEnableMasks + * + * PARAMETERS: GpeEventInfo - GPE to update + * Type - What to do: ACPI_GPE_DISABLE or + * ACPI_GPE_ENABLE + * + * RETURN: Status + * + * DESCRIPTION: Updates GPE register enable masks based on the GPE type + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvUpdateGpeEnableMasks ( + ACPI_GPE_EVENT_INFO *GpeEventInfo, + UINT8 Type) +{ + ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; + UINT8 RegisterBit; + + + ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMasks); + + + GpeRegisterInfo = GpeEventInfo->RegisterInfo; + if (!GpeRegisterInfo) + { + return_ACPI_STATUS (AE_NOT_EXIST); + } + RegisterBit = (UINT8) + (1 << (GpeEventInfo->GpeNumber - GpeRegisterInfo->BaseGpeNumber)); + + /* 1) Disable case. Simply clear all enable bits */ + + if (Type == ACPI_GPE_DISABLE) + { + ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); + ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); + return_ACPI_STATUS (AE_OK); + } + + /* 2) Enable case. Set/Clear the appropriate enable bits */ + + switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) + { + case ACPI_GPE_TYPE_WAKE: + ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); + ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); + break; + + case ACPI_GPE_TYPE_RUNTIME: + ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); + ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); + break; + + case ACPI_GPE_TYPE_WAKE_RUN: + ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); + ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); + break; + + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvEnableGpe + * + * PARAMETERS: GpeEventInfo - GPE to enable + * WriteToHardware - Enable now, or just mark data structs + * (WAKE GPEs should be deferred) + * + * RETURN: Status + * + * DESCRIPTION: Enable a GPE based on the GPE type + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvEnableGpe ( + ACPI_GPE_EVENT_INFO *GpeEventInfo, + BOOLEAN WriteToHardware) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (EvEnableGpe); + + + /* Make sure HW enable masks are updated */ + + Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_ENABLE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Mark wake-enabled or HW enable, or both */ + + switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) + { + case ACPI_GPE_TYPE_WAKE: + + ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); + break; + + case ACPI_GPE_TYPE_WAKE_RUN: + + ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); + + /*lint -fallthrough */ + + case ACPI_GPE_TYPE_RUNTIME: + + ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); + + if (WriteToHardware) + { + /* Clear the GPE (of stale events), then enable it */ + + Status = AcpiHwClearGpe (GpeEventInfo); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Enable the requested runtime GPE */ + + Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); + } + break; + + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvDisableGpe + * + * PARAMETERS: GpeEventInfo - GPE to disable + * + * RETURN: Status + * + * DESCRIPTION: Disable a GPE based on the GPE type + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvDisableGpe ( + ACPI_GPE_EVENT_INFO *GpeEventInfo) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (EvDisableGpe); + + + if (!(GpeEventInfo->Flags & ACPI_GPE_ENABLE_MASK)) + { + return_ACPI_STATUS (AE_OK); + } + + /* Make sure HW enable masks are updated */ + + Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_DISABLE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Mark wake-disabled or HW disable, or both */ + + switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) + { + case ACPI_GPE_TYPE_WAKE: + ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); + break; + + case ACPI_GPE_TYPE_WAKE_RUN: + ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); + + /*lint -fallthrough */ + + case ACPI_GPE_TYPE_RUNTIME: + + /* Disable the requested runtime GPE */ + + ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); + Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); + break; + + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGetGpeEventInfo + * + * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 + * GpeNumber - Raw GPE number + * + * RETURN: A GPE EventInfo struct. NULL if not a valid GPE + * + * DESCRIPTION: Returns the EventInfo struct associated with this GPE. + * Validates the GpeBlock and the GpeNumber + * + * Should be called only when the GPE lists are semaphore locked + * and not subject to change. + * + ******************************************************************************/ + +ACPI_GPE_EVENT_INFO * +AcpiEvGetGpeEventInfo ( + ACPI_HANDLE GpeDevice, + UINT32 GpeNumber) +{ + ACPI_OPERAND_OBJECT *ObjDesc; + ACPI_GPE_BLOCK_INFO *GpeBlock; + ACPI_NATIVE_UINT i; + + + ACPI_FUNCTION_ENTRY (); + + + /* A NULL GpeBlock means use the FADT-defined GPE block(s) */ + + if (!GpeDevice) + { + /* Examine GPE Block 0 and 1 (These blocks are permanent) */ + + for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) + { + GpeBlock = AcpiGbl_GpeFadtBlocks[i]; + if (GpeBlock) + { + if ((GpeNumber >= GpeBlock->BlockBaseNumber) && + (GpeNumber < GpeBlock->BlockBaseNumber + + (GpeBlock->RegisterCount * 8))) + { + return (&GpeBlock->EventInfo[GpeNumber - + GpeBlock->BlockBaseNumber]); + } + } + } + + /* The GpeNumber was not in the range of either FADT GPE block */ + + return (NULL); + } + + /* A Non-NULL GpeDevice means this is a GPE Block Device */ + + ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice); + if (!ObjDesc || + !ObjDesc->Device.GpeBlock) + { + return (NULL); + } + + GpeBlock = ObjDesc->Device.GpeBlock; + + if ((GpeNumber >= GpeBlock->BlockBaseNumber) && + (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8))) + { + return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]); + } + + return (NULL); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGpeDetect + * + * PARAMETERS: GpeXruptList - Interrupt block for this interrupt. + * Can have multiple GPE blocks attached. + * + * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED + * + * DESCRIPTION: Detect if any GP events have occurred. This function is + * executed at interrupt level. + * + ******************************************************************************/ + +UINT32 +AcpiEvGpeDetect ( + ACPI_GPE_XRUPT_INFO *GpeXruptList) +{ + ACPI_STATUS Status; + ACPI_GPE_BLOCK_INFO *GpeBlock; + ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; + UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; + UINT8 EnabledStatusByte; + UINT32 StatusReg; + UINT32 EnableReg; + ACPI_CPU_FLAGS Flags; + ACPI_NATIVE_UINT i; + ACPI_NATIVE_UINT j; + + + ACPI_FUNCTION_NAME (EvGpeDetect); + + /* Check for the case where there are no GPEs */ + + if (!GpeXruptList) + { + return (IntStatus); + } + + /* + * We need to obtain the GPE lock for both the data structs and registers + * Note: Not necessary to obtain the hardware lock, since the GPE registers + * are owned by the GpeLock. + */ + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + + /* Examine all GPE blocks attached to this interrupt level */ + + GpeBlock = GpeXruptList->GpeBlockListHead; + while (GpeBlock) + { + /* + * Read all of the 8-bit GPE status and enable registers + * in this GPE block, saving all of them. + * Find all currently active GP events. + */ + for (i = 0; i < GpeBlock->RegisterCount; i++) + { + /* Get the next status/enable pair */ + + GpeRegisterInfo = &GpeBlock->RegisterInfo[i]; + + /* Read the Status Register */ + + Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &StatusReg, + &GpeRegisterInfo->StatusAddress); + if (ACPI_FAILURE (Status)) + { + goto UnlockAndExit; + } + + /* Read the Enable Register */ + + Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &EnableReg, + &GpeRegisterInfo->EnableAddress); + if (ACPI_FAILURE (Status)) + { + goto UnlockAndExit; + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, + "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", + GpeRegisterInfo->BaseGpeNumber, StatusReg, EnableReg)); + + /* Check if there is anything active at all in this register */ + + EnabledStatusByte = (UINT8) (StatusReg & EnableReg); + if (!EnabledStatusByte) + { + /* No active GPEs in this register, move on */ + + continue; + } + + /* Now look at the individual GPEs in this byte register */ + + for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) + { + /* Examine one GPE bit */ + + if (EnabledStatusByte & (1 << j)) + { + /* + * Found an active GPE. Dispatch the event to a handler + * or method. + */ + IntStatus |= AcpiEvGpeDispatch ( + &GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) + j], + (UINT32) j + GpeRegisterInfo->BaseGpeNumber); + } + } + } + + GpeBlock = GpeBlock->Next; + } + +UnlockAndExit: + + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + return (IntStatus); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvAsynchExecuteGpeMethod + * + * PARAMETERS: Context (GpeEventInfo) - Info for this GPE + * + * RETURN: None + * + * DESCRIPTION: Perform the actual execution of a GPE control method. This + * function is called from an invocation of AcpiOsExecute and + * therefore does NOT execute at interrupt level - so that + * the control method itself is not executed in the context of + * an interrupt handler. + * + ******************************************************************************/ + +static void ACPI_SYSTEM_XFACE +AcpiEvAsynchExecuteGpeMethod ( + void *Context) +{ + ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context; + ACPI_STATUS Status; + ACPI_GPE_EVENT_INFO LocalGpeEventInfo; + ACPI_EVALUATE_INFO *Info; + + + ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod); + + + Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (Status)) + { + return_VOID; + } + + /* Must revalidate the GpeNumber/GpeBlock */ + + if (!AcpiEvValidGpeEvent (GpeEventInfo)) + { + Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); + return_VOID; + } + + /* Set the GPE flags for return to enabled state */ + + (void) AcpiEvEnableGpe (GpeEventInfo, FALSE); + + /* + * Take a snapshot of the GPE info for this level - we copy the + * info to prevent a race condition with RemoveHandler/RemoveBlock. + */ + ACPI_MEMCPY (&LocalGpeEventInfo, GpeEventInfo, + sizeof (ACPI_GPE_EVENT_INFO)); + + Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (Status)) + { + return_VOID; + } + + /* + * Must check for control method type dispatch one more + * time to avoid race with EvGpeInstallHandler + */ + if ((LocalGpeEventInfo.Flags & ACPI_GPE_DISPATCH_MASK) == + ACPI_GPE_DISPATCH_METHOD) + { + /* Allocate the evaluation information block */ + + Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); + if (!Info) + { + Status = AE_NO_MEMORY; + } + else + { + /* + * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx + * control method that corresponds to this GPE + */ + Info->PrefixNode = LocalGpeEventInfo.Dispatch.MethodNode; + Info->Parameters = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT *, GpeEventInfo); + Info->ParameterType = ACPI_PARAM_GPE; + Info->Flags = ACPI_IGNORE_RETURN_VALUE; + + Status = AcpiNsEvaluate (Info); + ACPI_FREE (Info); + } + + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "while evaluating GPE method [%4.4s]", + AcpiUtGetNodeName (LocalGpeEventInfo.Dispatch.MethodNode))); + } + } + + if ((LocalGpeEventInfo.Flags & ACPI_GPE_XRUPT_TYPE_MASK) == + ACPI_GPE_LEVEL_TRIGGERED) + { + /* + * GPE is level-triggered, we clear the GPE status bit after + * handling the event. + */ + Status = AcpiHwClearGpe (&LocalGpeEventInfo); + if (ACPI_FAILURE (Status)) + { + return_VOID; + } + } + + /* Enable this GPE */ + + (void) AcpiHwWriteGpeEnableReg (&LocalGpeEventInfo); + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGpeDispatch + * + * PARAMETERS: GpeEventInfo - Info for this GPE + * GpeNumber - Number relative to the parent GPE block + * + * 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 ( + ACPI_GPE_EVENT_INFO *GpeEventInfo, + UINT32 GpeNumber) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (EvGpeDispatch); + + + AcpiGpeCount++; + + /* + * If edge-triggered, clear the GPE status bit now. Note that + * level-triggered events are cleared after the GPE is serviced. + */ + if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == + ACPI_GPE_EDGE_TRIGGERED) + { + Status = AcpiHwClearGpe (GpeEventInfo); + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Unable to clear GPE[%2X]", GpeNumber)); + return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); + } + } + + if (!AcpiGbl_SystemAwakeAndRunning) + { + /* + * We just woke up because of a wake GPE. Disable any further GPEs + * until we are fully up and running (Only wake GPEs should be enabled + * at this time, but we just brute-force disable them all.) + * 1) We must disable this particular wake GPE so it won't fire again + * 2) We want to disable all wake GPEs, since we are now awake + */ + (void) AcpiHwDisableAllGpes (); + } + + /* + * 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 this GPE to prevent further such pointless + * events from firing. + */ + switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) + { + case ACPI_GPE_DISPATCH_HANDLER: + + /* + * Invoke the installed handler (at interrupt level) + * Ignore return status for now. TBD: leave GPE disabled on error? + */ + (void) GpeEventInfo->Dispatch.Handler->Address ( + GpeEventInfo->Dispatch.Handler->Context); + + /* It is now safe to clear level-triggered events. */ + + if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == + ACPI_GPE_LEVEL_TRIGGERED) + { + Status = AcpiHwClearGpe (GpeEventInfo); + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Unable to clear GPE[%2X]", GpeNumber)); + return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); + } + } + break; + + case ACPI_GPE_DISPATCH_METHOD: + + /* + * Disable the GPE, so it doesn't keep firing before the method has a + * chance to run (it runs asynchronously with interrupts enabled). + */ + Status = AcpiEvDisableGpe (GpeEventInfo); + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Unable to disable GPE[%2X]", GpeNumber)); + return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); + } + + /* + * Execute the method associated with the GPE + * NOTE: Level-triggered GPEs are cleared after the method completes. + */ + Status = AcpiOsExecute (OSL_GPE_HANDLER, + AcpiEvAsynchExecuteGpeMethod, GpeEventInfo); + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Unable to queue handler for GPE[%2X] - event disabled", + GpeNumber)); + } + break; + + default: + + /* No handler or method to run! */ + + ACPI_ERROR ((AE_INFO, + "No handler or method for GPE[%2X], disabling event", + GpeNumber)); + + /* + * Disable the GPE. The GPE will remain disabled until the ACPI + * Core Subsystem is restarted, or a handler is installed. + */ + Status = AcpiEvDisableGpe (GpeEventInfo); + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Unable to disable GPE[%2X]", GpeNumber)); + return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); + } + break; + } + + return_UINT32 (ACPI_INTERRUPT_HANDLED); +} + |
