diff options
Diffstat (limited to 'source/components/events/evgpe.c')
| -rw-r--r-- | source/components/events/evgpe.c | 238 |
1 files changed, 137 insertions, 101 deletions
diff --git a/source/components/events/evgpe.c b/source/components/events/evgpe.c index ccc154787eb4..415df720a1ae 100644 --- a/source/components/events/evgpe.c +++ b/source/components/events/evgpe.c @@ -226,7 +226,7 @@ AcpiEvUpdateGpeEnableMask ( * * RETURN: Status * - * DESCRIPTION: Clear a GPE of stale events and enable it. + * DESCRIPTION: Enable a GPE. * ******************************************************************************/ @@ -240,14 +240,6 @@ AcpiEvEnableGpe ( ACPI_FUNCTION_TRACE (EvEnableGpe); - /* Clear the GPE (of stale events) */ - - Status = AcpiHwClearGpe (GpeEventInfo); - if (ACPI_FAILURE (Status)) - { - return_ACPI_STATUS (Status); - } - /* Enable the requested GPE */ Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE); @@ -542,17 +534,12 @@ UINT32 AcpiEvGpeDetect ( ACPI_GPE_XRUPT_INFO *GpeXruptList) { - ACPI_STATUS Status; ACPI_GPE_BLOCK_INFO *GpeBlock; ACPI_NAMESPACE_NODE *GpeDevice; ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; ACPI_GPE_EVENT_INFO *GpeEventInfo; UINT32 GpeNumber; - ACPI_GPE_HANDLER_INFO *GpeHandlerInfo; UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; - UINT8 EnabledStatusByte; - UINT64 StatusReg; - UINT64 EnableReg; ACPI_CPU_FLAGS Flags; UINT32 i; UINT32 j; @@ -608,105 +595,25 @@ AcpiEvGpeDetect ( continue; } - /* Read the Status Register */ - - Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress); - if (ACPI_FAILURE (Status)) - { - goto UnlockAndExit; - } - - /* Read the Enable Register */ - - Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress); - if (ACPI_FAILURE (Status)) - { - goto UnlockAndExit; - } - - ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, - "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, " - "RunEnable=%02X, WakeEnable=%02X\n", - GpeRegisterInfo->BaseGpeNumber, - GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1), - (UINT32) StatusReg, (UINT32) EnableReg, - GpeRegisterInfo->EnableForRun, - GpeRegisterInfo->EnableForWake)); - - /* 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 */ + /* Detect and dispatch one GPE bit */ GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i * ACPI_GPE_REGISTER_WIDTH) + j]; GpeNumber = j + GpeRegisterInfo->BaseGpeNumber; - - if (EnabledStatusByte & (1 << j)) - { - /* Invoke global event handler if present */ - - AcpiGpeCount++; - if (AcpiGbl_GlobalEventHandler) - { - AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE, - GpeDevice, GpeNumber, - AcpiGbl_GlobalEventHandlerContext); - } - - /* Found an active GPE */ - - if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == - ACPI_GPE_DISPATCH_RAW_HANDLER) - { - /* Dispatch the event to a raw handler */ - - GpeHandlerInfo = GpeEventInfo->Dispatch.Handler; - - /* - * There is no protection around the namespace node - * and the GPE handler to ensure a safe destruction - * because: - * 1. The namespace node is expected to always - * exist after loading a table. - * 2. The GPE handler is expected to be flushed by - * AcpiOsWaitEventsComplete() before the - * destruction. - */ - AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); - IntStatus |= GpeHandlerInfo->Address ( - GpeDevice, GpeNumber, GpeHandlerInfo->Context); - Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); - } - else - { - /* - * Dispatch the event to a standard handler or - * method. - */ - IntStatus |= AcpiEvGpeDispatch (GpeDevice, - GpeEventInfo, GpeNumber); - } - } + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + IntStatus |= AcpiEvDetectGpe ( + GpeDevice, GpeEventInfo, GpeNumber); + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); } } GpeBlock = GpeBlock->Next; } -UnlockAndExit: - AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return (IntStatus); } @@ -894,6 +801,137 @@ AcpiEvFinishGpe ( /******************************************************************************* * + * FUNCTION: AcpiEvDetectGpe + * + * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 + * GpeEventInfo - Info for this GPE + * GpeNumber - Number relative to the parent GPE block + * + * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED + * + * DESCRIPTION: Detect and dispatch a General Purpose Event to either a function + * (e.g. EC) or method (e.g. _Lxx/_Exx) handler. + * NOTE: GPE is W1C, so it is possible to handle a single GPE from both + * task and irq context in parallel as long as the process to + * detect and mask the GPE is atomic. + * However the atomicity of ACPI_GPE_DISPATCH_RAW_HANDLER is + * dependent on the raw handler itself. + * + ******************************************************************************/ + +UINT32 +AcpiEvDetectGpe ( + ACPI_NAMESPACE_NODE *GpeDevice, + ACPI_GPE_EVENT_INFO *GpeEventInfo, + UINT32 GpeNumber) +{ + UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; + UINT8 EnabledStatusByte; + UINT64 StatusReg; + UINT64 EnableReg; + UINT32 RegisterBit; + ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; + ACPI_GPE_HANDLER_INFO *GpeHandlerInfo; + ACPI_CPU_FLAGS Flags; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (EvGpeDetect); + + + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + + /* Get the info block for the entire GPE register */ + + GpeRegisterInfo = GpeEventInfo->RegisterInfo; + + /* Get the register bitmask for this GPE */ + + RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo); + + /* GPE currently enabled (enable bit == 1)? */ + + Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress); + if (ACPI_FAILURE (Status)) + { + goto ErrorExit; + } + + /* GPE currently active (status bit == 1)? */ + + Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress); + if (ACPI_FAILURE (Status)) + { + goto ErrorExit; + } + + /* Check if there is anything active at all in this GPE */ + + ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, + "Read registers for GPE %02X: Status=%02X, Enable=%02X, " + "RunEnable=%02X, WakeEnable=%02X\n", + GpeNumber, + (UINT32) (StatusReg & RegisterBit), + (UINT32) (EnableReg & RegisterBit), + GpeRegisterInfo->EnableForRun, + GpeRegisterInfo->EnableForWake)); + + EnabledStatusByte = (UINT8) (StatusReg & EnableReg); + if (!(EnabledStatusByte & RegisterBit)) + { + goto ErrorExit; + } + + /* Invoke global event handler if present */ + + AcpiGpeCount++; + if (AcpiGbl_GlobalEventHandler) + { + AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE, + GpeDevice, GpeNumber, + AcpiGbl_GlobalEventHandlerContext); + } + + /* Found an active GPE */ + + if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == + ACPI_GPE_DISPATCH_RAW_HANDLER) + { + /* Dispatch the event to a raw handler */ + + GpeHandlerInfo = GpeEventInfo->Dispatch.Handler; + + /* + * There is no protection around the namespace node + * and the GPE handler to ensure a safe destruction + * because: + * 1. The namespace node is expected to always + * exist after loading a table. + * 2. The GPE handler is expected to be flushed by + * AcpiOsWaitEventsComplete() before the + * destruction. + */ + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + IntStatus |= GpeHandlerInfo->Address ( + GpeDevice, GpeNumber, GpeHandlerInfo->Context); + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + } + else + { + /* Dispatch the event to a standard handler or method. */ + + IntStatus |= AcpiEvGpeDispatch (GpeDevice, + GpeEventInfo, GpeNumber); + } + +ErrorExit: + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + return (IntStatus); +} + + +/******************************************************************************* + * * FUNCTION: AcpiEvGpeDispatch * * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 @@ -905,8 +943,6 @@ AcpiEvFinishGpe ( * 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 |