EFI_STATUS QNCSmmCoreUnRegister ( IN QNC_SMM_GENERIC_PROTOCOL *This, IN EFI_HANDLE DispatchHandle ) /*++ Routine Description: Arguments: Returns: --*/ // GC_TODO: This - add argument and description to function comment // GC_TODO: DispatchHandle - add argument and description to function comment // GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment // GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment // GC_TODO: EFI_SUCCESS - add return value to function comment { BOOLEAN SafeToDisable; DATABASE_RECORD *RecordToDelete; DATABASE_RECORD *RecordInDb; LIST_ENTRY *LinkInDb; if (DispatchHandle == NULL) { return EFI_INVALID_PARAMETER; } if (BASE_CR (DispatchHandle, DATABASE_RECORD, Link)->Signature != DATABASE_RECORD_SIGNATURE) { return EFI_INVALID_PARAMETER; } RecordToDelete = DATABASE_RECORD_FROM_LINK (DispatchHandle); RemoveEntryList (&RecordToDelete->Link); RecordToDelete->Signature = 0; // // See if we can disable the source, reserved for future use since this might // not be the only criteria to disable // SafeToDisable = TRUE; LinkInDb = GetFirstNode (&mPrivateData.CallbackDataBase); while(!IsNull (&mPrivateData.CallbackDataBase, LinkInDb)) { RecordInDb = DATABASE_RECORD_FROM_LINK (LinkInDb); if (CompareEnables (&RecordToDelete->SrcDesc, &RecordInDb->SrcDesc)) { SafeToDisable = FALSE; break; } LinkInDb = GetNextNode (&mPrivateData.CallbackDataBase, &RecordInDb->Link); } if (SafeToDisable) { QNCSmmDisableSource( &RecordToDelete->SrcDesc ); } FreePool (RecordToDelete); return EFI_SUCCESS; }
VOID QNCSmmPeriodicTimerClearSource ( IN QNC_SMM_SOURCE_DESC *SrcDesc ) /*++ Routine Description: This function is responsible for calculating and enabling any timers that are required to dispatch messages to children. The SrcDesc argument isn't acutally used. Arguments: SrcDesc - Pointer to the QNC_SMM_SOURCE_DESC instance. Returns: None. --*/ { DATABASE_RECORD *RecordInDb; LIST_ENTRY *LinkInDb; QNCSmmPeriodicTimerProgramTimers (); // // Reset Elapsed time // LinkInDb = GetFirstNode (&mPrivateData.CallbackDataBase); while (!IsNull (&mPrivateData.CallbackDataBase, LinkInDb)) { RecordInDb = DATABASE_RECORD_FROM_LINK (LinkInDb); if (RecordInDb->ProtocolType == PeriodicTimerType) { // // This child is registerd with the PeriodicTimer protocol and Callback // has been invoked, so reset the ElapsedTime to 0 // if (RecordInDb->CommBuffer.PeriodicTimer.ElapsedTime >= RecordInDb->ChildContext.PeriodicTimer.Period) { RecordInDb->CommBuffer.PeriodicTimer.ElapsedTime = 0; } } LinkInDb = GetNextNode (&mPrivateData.CallbackDataBase, &RecordInDb->Link); } }
EFI_STATUS SmiInputValueDuplicateCheck ( UINTN FedSwSmiInputValue ) /*++ Routine Description: Check the Fed SwSmiInputValue to see if there is a duplicated one in the database Arguments: None Returns: Status - EFI_SUCCESS, EFI_INVALID_PARAMETER --*/ // GC_TODO: FedSwSmiInputValue - add argument and description to function comment { DATABASE_RECORD *RecordInDb; LIST_ENTRY *LinkInDb; LinkInDb = GetFirstNode (&mPrivateData.CallbackDataBase); while (!IsNull (&mPrivateData.CallbackDataBase, LinkInDb)) { RecordInDb = DATABASE_RECORD_FROM_LINK (LinkInDb); if (RecordInDb->ProtocolType == SwType) { if (RecordInDb->ChildContext.Sw.SwSmiInputValue == FedSwSmiInputValue) { return EFI_INVALID_PARAMETER; } } LinkInDb = GetNextNode (&mPrivateData.CallbackDataBase, &RecordInDb->Link); } return EFI_SUCCESS; }
/** This function is the main entry point for an SMM handler dispatch or communicate-based callback. @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister(). @param RegisterContext Points to an optional handler context which was specified when the handler was registered. @param CommBuffer A pointer to a collection of data in memory that will be conveyed from a non-SMM environment into an SMM environment. @param CommBufferSize The size of the CommBuffer. @return Status Code **/ EFI_STATUS QNCSmmCoreDispatcher ( IN EFI_HANDLE DispatchHandle, IN CONST VOID *RegisterContext, IN OUT VOID *CommBuffer, IN OUT UINTN *CommBufferSize ) { // // Used to prevent infinite loops // UINTN EscapeCount; BOOLEAN ContextsMatch; BOOLEAN ResetListSearch; BOOLEAN EosSet; BOOLEAN SxChildWasDispatched; BOOLEAN ChildWasDispatched; DATABASE_RECORD *RecordInDb; DATABASE_RECORD ActiveRecordInDb; LIST_ENTRY *LinkInDb; DATABASE_RECORD *RecordToExhaust; LIST_ENTRY *LinkToExhaust; QNC_SMM_CONTEXT Context; VOID *CommunicationBuffer; UINTN BufferSize; EFI_STATUS Status; UINT32 NewValue; QNC_SMM_SOURCE_DESC ActiveSource = NULL_SOURCE_DESC_INITIALIZER; EscapeCount = 100; ContextsMatch = FALSE; ResetListSearch = FALSE; EosSet = FALSE; SxChildWasDispatched = FALSE; Status = EFI_WARN_INTERRUPT_SOURCE_PENDING; ChildWasDispatched = FALSE; // // Mark all child handlers as not processed // LinkInDb = GetFirstNode (&mPrivateData.CallbackDataBase); while (!IsNull (&mPrivateData.CallbackDataBase, LinkInDb)) { RecordInDb = DATABASE_RECORD_FROM_LINK (LinkInDb); RecordInDb->Processed = FALSE; LinkInDb = GetNextNode (&mPrivateData.CallbackDataBase, LinkInDb); } // // Preserve Index registers // SaveState (); if (!IsListEmpty (&mPrivateData.CallbackDataBase)) { // // We have children registered w/ us -- continue // while ((!EosSet) && (EscapeCount > 0)) { EscapeCount--; // // Reset this flag in order to be able to process multiple SMI Sources in one loop. // ResetListSearch = FALSE; LinkInDb = GetFirstNode (&mPrivateData.CallbackDataBase); while ((!IsNull (&mPrivateData.CallbackDataBase, LinkInDb)) && (ResetListSearch == FALSE)) { RecordInDb = DATABASE_RECORD_FROM_LINK (LinkInDb); // // Make a copy of the record that contains an active SMI source, // because un-register maybe invoked in callback function and // RecordInDb maybe released // CopyMem (&ActiveRecordInDb, RecordInDb, sizeof (ActiveRecordInDb)); // // look for the first active source // if (!SourceIsActive (&RecordInDb->SrcDesc)) { // // Didn't find the source yet, keep looking // LinkInDb = GetNextNode (&mPrivateData.CallbackDataBase, &RecordInDb->Link); } else { // // We found a source. If this is a sleep type, we have to go to // appropriate sleep state anyway.No matter there is sleep child or not // if (RecordInDb->ProtocolType == SxType) { SxChildWasDispatched = TRUE; } // // "cache" the source description and don't query I/O anymore // CopyMem (&ActiveSource, &RecordInDb->SrcDesc, sizeof (ActiveSource)); LinkToExhaust = LinkInDb; // // exhaust the rest of the queue looking for the same source // while (!IsNull (&mPrivateData.CallbackDataBase, LinkToExhaust)) { RecordToExhaust = DATABASE_RECORD_FROM_LINK (LinkToExhaust); LinkToExhaust = GetNextNode (&mPrivateData.CallbackDataBase, LinkToExhaust); if (RecordToExhaust->Processed) { // // Record has already been processed. Continue with next child handler. // continue; } if (CompareSources (&RecordToExhaust->SrcDesc, &ActiveSource)) { // // These source descriptions are equal, so this callback should be // dispatched. // if (RecordToExhaust->ContextFunctions.GetContext != NULL) { // // This child requires that we get a calling context from // hardware and compare that context to the one supplied // by the child. // ASSERT (RecordToExhaust->ContextFunctions.CmpContext != NULL); // // Make sure contexts match before dispatching event to child // RecordToExhaust->ContextFunctions.GetContext (RecordToExhaust, &Context); ContextsMatch = RecordToExhaust->ContextFunctions.CmpContext (&Context, &RecordToExhaust->ChildContext); } else { // // This child doesn't require any more calling context beyond what // it supplied in registration. Simply pass back what it gave us. // ASSERT (RecordToExhaust->Callback != NULL); ContextsMatch = TRUE; } // // Mark this child handler so it will not be processed again // RecordToExhaust->Processed = TRUE; if (ContextsMatch) { if (RecordToExhaust->BufferSize != 0) { ASSERT (RecordToExhaust->ContextFunctions.GetBuffer != NULL); RecordToExhaust->ContextFunctions.GetBuffer (RecordToExhaust); CommunicationBuffer = &RecordToExhaust->CommBuffer; BufferSize = RecordToExhaust->BufferSize; } else { CommunicationBuffer = NULL; BufferSize = 0; } ASSERT (RecordToExhaust->Callback != NULL); RecordToExhaust->Callback ( (EFI_HANDLE) & RecordToExhaust->Link, RecordToExhaust->CallbackContext, CommunicationBuffer, &BufferSize ); ChildWasDispatched = TRUE; if (RecordToExhaust->ProtocolType == SxType) { SxChildWasDispatched = TRUE; } } // // Can not use RecordInDb after this point because Callback may have unregistered RecordInDb // Restart processing of SMI handlers from the begining of the linked list because the // state of the linked listed may have been modified due to unregister actions in the Callback. // LinkToExhaust = GetFirstNode (&mPrivateData.CallbackDataBase); } } if (ActiveRecordInDb.ClearSource == NULL) { // // Clear the SMI associated w/ the source using the default function // QNCSmmClearSource (&ActiveSource); } else { // // This source requires special handling to clear // ActiveRecordInDb.ClearSource (&ActiveSource); } if (ChildWasDispatched) { // // The interrupt was handled and quiesced // Status = EFI_SUCCESS; } else { // // The interrupt was not handled but quiesced // Status = EFI_WARN_INTERRUPT_SOURCE_QUIESCED; } // // Queue is empty, reset the search // ResetListSearch = TRUE; } } EosSet = QNCSmmSetAndCheckEos (); } } // // If you arrive here, there are two possible reasons: // (1) you've got problems with clearing the SMI status bits in the // ACPI table. If you don't properly clear the SMI bits, then you won't be able to set the // EOS bit. If this happens too many times, the loop exits. // (2) there was a SMM communicate for callback messages that was received prior // to this driver. // If there is an asynchronous SMI that occurs while processing the Callback, let // all of the drivers (including this one) have an opportunity to scan for the SMI // and handle it. // If not, we don't want to exit and have the foreground app. clear EOS without letting // these other sources get serviced. // ASSERT (EscapeCount > 0); // // Restore Index registers // RestoreState (); if (SxChildWasDispatched) { // // A child of the SmmSxDispatch protocol was dispatched during this call; // put the system to sleep. // QNCSmmSxGoToSleep (); } // // Ensure that SMI signal pin indicator is clear at the end of SMM handling. // NewValue = QNCPortRead (QUARK_NC_HOST_BRIDGE_SB_PORT_ID, QUARK_NC_HOST_BRIDGE_HLEGACY_REG); NewValue &= ~(HLEGACY_SMI_PIN_VALUE); QNCPortWrite (QUARK_NC_HOST_BRIDGE_SB_PORT_ID, QUARK_NC_HOST_BRIDGE_HLEGACY_REG, NewValue); return Status; }
VOID QNCSmmPeriodicTimerProgramTimers ( VOID ) { UINT32 GpePmcwValue; SUPPORTED_TIMER Timer; DATABASE_RECORD *RecordInDb; LIST_ENTRY *LinkInDb; TIMER_INTERVAL *TimerInterval; // // Find the minimum required interval for each timer // for (Timer = (SUPPORTED_TIMER)0; Timer < NUM_TIMERS; Timer++) { mTimers[Timer].MinReqInterval = ~(UINT64)0x0; mTimers[Timer].NumChildren = 0; } LinkInDb = GetFirstNode (&mPrivateData.CallbackDataBase); while (!IsNull (&mPrivateData.CallbackDataBase, LinkInDb)) { RecordInDb = DATABASE_RECORD_FROM_LINK (LinkInDb); if (RecordInDb->ProtocolType == PeriodicTimerType) { // // This child is registerd with the PeriodicTimer protocol // TimerInterval = ContextToTimerInterval (&RecordInDb->ChildContext); if(TimerInterval != NULL) { Timer = (SUPPORTED_TIMER)((TIMER_INTERVAL *) (TimerInterval))->AssociatedTimer; ASSERT (Timer >= 0 && Timer < NUM_TIMERS); if (mTimers[Timer].MinReqInterval > RecordInDb->ChildContext.PeriodicTimer.SmiTickInterval) { mTimers[Timer].MinReqInterval = RecordInDb->ChildContext.PeriodicTimer.SmiTickInterval; } mTimers[Timer].NumChildren++; } } LinkInDb = GetNextNode (&mPrivateData.CallbackDataBase, &RecordInDb->Link); } // // Program the hardware // GpePmcwValue = 0; if (mTimers[PERIODIC_TIMER].NumChildren > 0) { switch (mTimers[PERIODIC_TIMER].MinReqInterval) { case TIME_64s: GpePmcwValue = INDEX_TIME_64s; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_64s; break; case TIME_32s: GpePmcwValue = INDEX_TIME_32s; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_32s; break; case TIME_16s: GpePmcwValue = INDEX_TIME_16s; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_16s; break; case TIME_8s: GpePmcwValue = INDEX_TIME_8s; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_8s; break; case TIME_64ms: GpePmcwValue = INDEX_TIME_64ms; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_64ms; break; case TIME_32ms: GpePmcwValue = INDEX_TIME_32ms; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_32ms; break; case TIME_16ms: GpePmcwValue = INDEX_TIME_16ms; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_16ms; break; case TIME_1_5ms: GpePmcwValue = INDEX_TIME_1_5ms; mTimers[PERIODIC_TIMER].CurrentSetting = INDEX_TIME_1_5ms; break; default: ASSERT (FALSE); break; }; GpePmcwValue |= B_QNC_GPE0BLK_PMCW_PSE; IoOr32(((UINT16)(LpcPciCfg32 (R_QNC_LPC_GPE0BLK) & 0xFFFF) + R_QNC_GPE0BLK_PMCW), GpePmcwValue); // // Restart the timer here, just need to clear the SMI // QNCSmmClearSource (&mTIMER_SOURCE_DESCS[PERIODIC_TIMER]); } else { QNCSmmDisableSource (&mTIMER_SOURCE_DESCS[PERIODIC_TIMER]); } }