C++ ACPI_SUCCESS函数代码示例

static void
EcGpeQueryHandler(void *Context)
{
    struct acpi_ec_softc	*sc = (struct acpi_ec_softc *)Context;
    UINT8			Data;
    ACPI_STATUS			Status;
    int				retry, sci_enqueued;
    char			qxx[5];

    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
    KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));

    /* Serialize user access with EcSpaceHandler(). */
    Status = EcLock(sc);
    if (ACPI_FAILURE(Status)) {
        device_printf(sc->ec_dev, "GpeQuery lock error: %s\n",
                      AcpiFormatException(Status));
        return;
    }

    /*
     * Send a query command to the EC to find out which _Qxx call it
     * wants to make.  This command clears the SCI bit and also the
     * interrupt source since we are edge-triggered.  To prevent the GPE
     * that may arise from running the query from causing another query
     * to be queued, we clear the pending flag only after running it.
     */
    sci_enqueued = sc->ec_sci_pend;
    for (retry = 0; retry < 2; retry++) {
        Status = EcCommand(sc, EC_COMMAND_QUERY);
        if (ACPI_SUCCESS(Status))
            break;
        if (ACPI_SUCCESS(EcCheckStatus(sc, "retr_check",
                                       EC_EVENT_INPUT_BUFFER_EMPTY)))
            continue;
        else
            break;
    }
    sc->ec_sci_pend = FALSE;
    if (ACPI_FAILURE(Status)) {
        EcUnlock(sc);
        device_printf(sc->ec_dev, "GPE query failed: %s\n",
                      AcpiFormatException(Status));
        return;
    }
    Data = EC_GET_DATA(sc);

    /*
     * We have to unlock before running the _Qxx method below since that
     * method may attempt to read/write from EC address space, causing
     * recursive acquisition of the lock.
     */
    EcUnlock(sc);

    /* Ignore the value for "no outstanding event". (13.3.5) */
    CTR2(KTR_ACPI, "ec query ok,%s running _Q%02X", Data ? "" : " not", Data);
    if (Data == 0)
        return;

    /* Evaluate _Qxx to respond to the controller. */
    snprintf(qxx, sizeof(qxx), "_Q%02X", Data);
    AcpiUtStrupr(qxx);
    Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
    if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
        device_printf(sc->ec_dev, "evaluation of query method %s failed: %s\n",
                      qxx, AcpiFormatException(Status));
    }

    /* Reenable runtime GPE if its execution was deferred. */
    if (sci_enqueued) {
        Status = AcpiFinishGpe(sc->ec_gpehandle, sc->ec_gpebit);
        if (ACPI_FAILURE(Status))
            device_printf(sc->ec_dev, "reenabling runtime GPE failed: %s\n",
                          AcpiFormatException(Status));
    }
}

/**
 * acpi_dev_pm_get_state - Get preferred power state of ACPI device.
 * @dev: Device whose preferred target power state to return.
 * @adev: ACPI device node corresponding to @dev.
 * @target_state: System state to match the resultant device state.
 * @d_min_p: Location to store the highest power state available to the device.
 * @d_max_p: Location to store the lowest power state available to the device.
 *
 * Find the lowest power (highest number) and highest power (lowest number) ACPI
 * device power states that the device can be in while the system is in the
 * state represented by @target_state.  Store the integer numbers representing
 * those stats in the memory locations pointed to by @d_max_p and @d_min_p,
 * respectively.
 *
 * Callers must ensure that @dev and @adev are valid pointers and that @adev
 * actually corresponds to @dev before using this function.
 *
 * Returns 0 on success or -ENODATA when one of the ACPI methods fails or
 * returns a value that doesn't make sense.  The memory locations pointed to by
 * @d_max_p and @d_min_p are only modified on success.
 */
static int acpi_dev_pm_get_state(struct device *dev, struct acpi_device *adev,
				 u32 target_state, int *d_min_p, int *d_max_p)
{
	char method[] = { '_', 'S', '0' + target_state, 'D', '\0' };
	acpi_handle handle = adev->handle;
	unsigned long long ret;
	int d_min, d_max;
	bool wakeup = false;
	acpi_status status;

	/*
	 * If the system state is S0, the lowest power state the device can be
	 * in is D3cold, unless the device has _S0W and is supposed to signal
	 * wakeup, in which case the return value of _S0W has to be used as the
	 * lowest power state available to the device.
	 */
	d_min = ACPI_STATE_D0;
	d_max = ACPI_STATE_D3_COLD;

	/*
	 * If present, _SxD methods return the minimum D-state (highest power
	 * state) we can use for the corresponding S-states.  Otherwise, the
	 * minimum D-state is D0 (ACPI 3.x).
	 */
	if (target_state > ACPI_STATE_S0) {
		/*
		 * We rely on acpi_evaluate_integer() not clobbering the integer
		 * provided if AE_NOT_FOUND is returned.
		 */
		ret = d_min;
		status = acpi_evaluate_integer(handle, method, NULL, &ret);
		if ((ACPI_FAILURE(status) && status != AE_NOT_FOUND)
		    || ret > ACPI_STATE_D3_COLD)
			return -ENODATA;

		/*
		 * We need to handle legacy systems where D3hot and D3cold are
		 * the same and 3 is returned in both cases, so fall back to
		 * D3cold if D3hot is not a valid state.
		 */
		if (!adev->power.states[ret].flags.valid) {
			if (ret == ACPI_STATE_D3_HOT)
				ret = ACPI_STATE_D3_COLD;
			else
				return -ENODATA;
		}
		d_min = ret;
		wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid
			&& adev->wakeup.sleep_state >= target_state;
	} else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) !=
			PM_QOS_FLAGS_NONE) {
		wakeup = adev->wakeup.flags.valid;
	}

	/*
	 * If _PRW says we can wake up the system from the target sleep state,
	 * the D-state returned by _SxD is sufficient for that (we assume a
	 * wakeup-aware driver if wake is set).  Still, if _SxW exists
	 * (ACPI 3.x), it should return the maximum (lowest power) D-state that
	 * can wake the system.  _S0W may be valid, too.
	 */
	if (wakeup) {
		method[3] = 'W';
		status = acpi_evaluate_integer(handle, method, NULL, &ret);
		if (status == AE_NOT_FOUND) {
			if (target_state > ACPI_STATE_S0)
				d_max = d_min;
		} else if (ACPI_SUCCESS(status) && ret <= ACPI_STATE_D3_COLD) {
			/* Fall back to D3cold if ret is not a valid state. */
			if (!adev->power.states[ret].flags.valid)
				ret = ACPI_STATE_D3_COLD;

			d_max = ret > d_min ? ret : d_min;
		} else {
			return -ENODATA;
		}
	}

	if (d_min_p)
//.........这里部分代码省略.........

static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
					struct thermal_cooling_device *cdev,
					bool bind)
{
	struct acpi_device *device = cdev->devdata;
	struct acpi_thermal *tz = thermal->devdata;
	struct acpi_device *dev;
	acpi_status status;
	acpi_handle handle;
	int i;
	int j;
	int trip = -1;
	int result = 0;

	if (tz->trips.critical.flags.valid)
		trip++;

	if (tz->trips.hot.flags.valid)
		trip++;

	if (tz->trips.passive.flags.valid) {
		trip++;
		for (i = 0; i < tz->trips.passive.devices.count;
		    i++) {
			handle = tz->trips.passive.devices.handles[i];
			status = acpi_bus_get_device(handle, &dev);
			if (ACPI_FAILURE(status) || dev != device)
				continue;
			if (bind)
				result =
					thermal_zone_bind_cooling_device
					(thermal, trip, cdev,
					 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
			else
				result =
					thermal_zone_unbind_cooling_device
					(thermal, trip, cdev);
			if (result)
				goto failed;
		}
	}

	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
		if (!tz->trips.active[i].flags.valid)
			break;
		trip++;
		for (j = 0;
		    j < tz->trips.active[i].devices.count;
		    j++) {
			handle = tz->trips.active[i].devices.handles[j];
			status = acpi_bus_get_device(handle, &dev);
			if (ACPI_FAILURE(status) || dev != device)
				continue;
			if (bind)
				result = thermal_zone_bind_cooling_device
					(thermal, trip, cdev,
					 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
			else
				result = thermal_zone_unbind_cooling_device
					(thermal, trip, cdev);
			if (result)
				goto failed;
		}
	}

	for (i = 0; i < tz->devices.count; i++) {
		handle = tz->devices.handles[i];
		status = acpi_bus_get_device(handle, &dev);
		if (ACPI_SUCCESS(status) && (dev == device)) {
			if (bind)
				result = thermal_zone_bind_cooling_device
						(thermal, -1, cdev,
						 THERMAL_NO_LIMIT,
						 THERMAL_NO_LIMIT);
			else
				result = thermal_zone_unbind_cooling_device
						(thermal, -1, cdev);
			if (result)
				goto failed;
		}
	}

failed:
	return result;
}

void
AcpiPsGetNextNamepath (
    ACPI_PARSE_STATE        *ParserState,
    ACPI_PARSE_OBJECT       *Arg,
    UINT32                  *ArgCount,
    BOOLEAN                 MethodCall)
{
    NATIVE_CHAR             *Path;
    ACPI_PARSE_OBJECT       *NameOp;
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *MethodNode = NULL;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_GENERIC_STATE      ScopeInfo;


    FUNCTION_TRACE ("PsGetNextNamepath");


    Path = AcpiPsGetNextNamestring (ParserState);
    if (!Path || !MethodCall)
    {
        /* Null name case, create a null namepath object */

        AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
        Arg->Value.Name = Path;
        return_VOID;
    }


    if (MethodCall)
    {
        /*
         * Lookup the name in the internal namespace
         */
        ScopeInfo.Scope.Node = NULL;
        Node = ParserState->StartNode;
        if (Node)
        {
            ScopeInfo.Scope.Node = Node;
        }

        /*
         * Lookup object.  We don't want to add anything new to the namespace
         * here, however.  So we use MODE_EXECUTE.  Allow searching of the
         * parent tree, but don't open a new scope -- we just want to lookup the
         * object  (MUST BE mode EXECUTE to perform upsearch)
         */
        Status = AcpiNsLookup (&ScopeInfo, Path, ACPI_TYPE_ANY, IMODE_EXECUTE,
                                NS_SEARCH_PARENT | NS_DONT_OPEN_SCOPE, NULL,
                                &Node);
        if (ACPI_SUCCESS (Status))
        {
            if (Node->Type == ACPI_TYPE_METHOD)
            {
                MethodNode = Node;
                ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "method - %p Path=%p\n",
                    MethodNode, Path));

                NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
                if (NameOp)
                {
                    /* Change arg into a METHOD CALL and attach name to it */

                    AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);

                    NameOp->Value.Name = Path;

                    /* Point METHODCALL/NAME to the METHOD Node */

                    NameOp->Node = MethodNode;
                    AcpiPsAppendArg (Arg, NameOp);

                    if (!(ACPI_OPERAND_OBJECT  *) MethodNode->Object)
                    {
                        return_VOID;
                    }

                    *ArgCount = ((ACPI_OPERAND_OBJECT  *) MethodNode->Object)->Method.ParamCount;
                }

                return_VOID;
            }

            /*
             * Else this is normal named object reference.
             * Just init the NAMEPATH object with the pathname.
             * (See code below)
             */
        }
    }

    /*
     * Either we didn't find the object in the namespace, or the object is
     * something other than a control method.  Just initialize the Op with the
     * pathname.
     */
    AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
    Arg->Value.Name = Path;


//.........这里部分代码省略.........

//.........这里部分代码省略.........

		acpi_db_generate_gpe(acpi_gbl_db_args[1], acpi_gbl_db_args[2]);
		break;

	case CMD_GPES:

		acpi_db_display_gpes();
		break;

	case CMD_SCI:

		acpi_db_generate_sci();
		break;

	case CMD_SLEEP:

		status = acpi_db_sleep(acpi_gbl_db_args[1]);
		break;

		/* File I/O commands. */

	case CMD_CLOSE:

		acpi_db_close_debug_file();
		break;

	case CMD_LOAD:{
			struct acpi_new_table_desc *list_head = NULL;

			status =
			    ac_get_all_tables_from_file(acpi_gbl_db_args[1],
							ACPI_GET_ALL_TABLES,
							&list_head);
			if (ACPI_SUCCESS(status)) {
				acpi_db_load_tables(list_head);
			}
		}
		break;

	case CMD_OPEN:

		acpi_db_open_debug_file(acpi_gbl_db_args[1]);
		break;

		/* User space commands. */

	case CMD_TERMINATE:

		acpi_db_set_output_destination(ACPI_DB_REDIRECTABLE_OUTPUT);
		acpi_ut_subsystem_shutdown();

		/*
		 * TBD: [Restructure] Need some way to re-initialize without
		 * re-creating the semaphores!
		 */

		acpi_gbl_db_terminate_loop = TRUE;
		/*  acpi_initialize (NULL); */
		break;

	case CMD_THREADS:

		acpi_db_create_execution_threads(acpi_gbl_db_args[1],
						 acpi_gbl_db_args[2],
						 acpi_gbl_db_args[3]);
		break;

//.........这里部分代码省略.........
        break;

    case CMD_SLEEP:

        Status = AcpiDbSleep (AcpiGbl_DbArgs[1]);
        break;

    case CMD_STATS:

        Status = AcpiDbDisplayStatistics (AcpiGbl_DbArgs[1]);
        break;

    case CMD_STOP:

        return (AE_NOT_IMPLEMENTED);

    case CMD_TABLES:

        AcpiDbDisplayTableInfo (AcpiGbl_DbArgs[1]);
        break;

    case CMD_TEMPLATE:

        AcpiDbDisplayTemplate (AcpiGbl_DbArgs[1]);
        break;

    case CMD_TERMINATE:

        AcpiDbSetOutputDestination (ACPI_DB_REDIRECTABLE_OUTPUT);
        AcpiUtSubsystemShutdown ();

        /*
         * TBD: [Restructure] Need some way to re-initialize without
         * re-creating the semaphores!
         */

        /*  AcpiInitialize (NULL);  */
        break;

    case CMD_THREADS:

        AcpiDbCreateExecutionThreads (AcpiGbl_DbArgs[1], AcpiGbl_DbArgs[2],
            AcpiGbl_DbArgs[3]);
        break;

    case CMD_TRACE:

        (void) AcpiDebugTrace (AcpiGbl_DbArgs[1],0,0,1);
        break;

    case CMD_TREE:

        AcpiDbDisplayCallingTree ();
        break;

    case CMD_TYPE:

        AcpiDbDisplayObjectType (AcpiGbl_DbArgs[1]);
        break;

    case CMD_UNLOAD:

        AcpiDbUnloadAcpiTable (AcpiGbl_DbArgs[1]);
        break;

    case CMD_EXIT:
    case CMD_QUIT:

        if (Op)
        {
            AcpiOsPrintf ("Method execution terminated\n");
            return (AE_CTRL_TERMINATE);
        }

        if (!AcpiGbl_DbOutputToFile)
        {
            AcpiDbgLevel = ACPI_DEBUG_DEFAULT;
        }

        AcpiDbCloseDebugFile ();
        AcpiGbl_DbTerminateThreads = TRUE;
        return (AE_CTRL_TERMINATE);

    case CMD_NOT_FOUND:
    default:

        AcpiOsPrintf ("Unknown Command\n");
        return (AE_CTRL_TRUE);
    }

    if (ACPI_SUCCESS (Status))
    {
        Status = AE_CTRL_TRUE;
    }

    /* Add all commands that come here to the history buffer */

    AcpiDbAddToHistory (InputBuffer);
    return (Status);
}

static void acpi_bus_osc_support(void)
{
	u32 capbuf[2];
	struct acpi_osc_context context = {
		.uuid_str = sb_uuid_str,
		.rev = 1,
		.cap.length = 8,
		.cap.pointer = capbuf,
	};
	acpi_handle handle;

	capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
	capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
			defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
#endif

#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
#endif

#ifdef ACPI_HOTPLUG_OST
	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
#endif

	if (!ghes_disable)
		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
		return;
	if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
		u32 *capbuf_ret = context.ret.pointer;
		if (context.ret.length > OSC_SUPPORT_DWORD)
			osc_sb_apei_support_acked =
				capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
		kfree(context.ret.pointer);
	}
	/* do we need to check other returned cap? Sounds no */
}

/* --------------------------------------------------------------------------
                             Notification Handling
   -------------------------------------------------------------------------- */

/**
 * acpi_bus_notify
 * ---------------
 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
 */
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
{
	struct acpi_device *device = NULL;
	struct acpi_driver *driver;

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
			  type, handle));

	switch (type) {

	case ACPI_NOTIFY_BUS_CHECK:
		/* TBD */
		break;

	case ACPI_NOTIFY_DEVICE_CHECK:
		/* TBD */
		break;

	case ACPI_NOTIFY_DEVICE_WAKE:
		/* TBD */
		break;

	case ACPI_NOTIFY_EJECT_REQUEST:
		/* TBD */
		break;

	case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
		/* TBD: Exactly what does 'light' mean? */
		break;

	case ACPI_NOTIFY_FREQUENCY_MISMATCH:
		/* TBD */
		break;

	case ACPI_NOTIFY_BUS_MODE_MISMATCH:
		/* TBD */
		break;

	case ACPI_NOTIFY_POWER_FAULT:
		/* TBD */
		break;

	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received unknown/unsupported notification [%08x]\n",
				  type));
		break;
	}

	acpi_bus_get_device(handle, &device);
	if (device) {
//.........这里部分代码省略.........

ACPI_STATUS
AcpiUtOsiImplementation (
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     *StringDesc;
    ACPI_OPERAND_OBJECT     *ReturnDesc;
    UINT32                  ReturnValue;
    UINT32                  i;


    ACPI_FUNCTION_TRACE (UtOsiImplementation);


    /* Validate the string input argument */

    StringDesc = WalkState->Arguments[0].Object;
    if (!StringDesc || (StringDesc->Common.Type != ACPI_TYPE_STRING))
    {
        return_ACPI_STATUS (AE_TYPE);
    }

    /* Create a return object */

    ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
    if (!ReturnDesc)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Default return value is 0, NOT SUPPORTED */

    ReturnValue = 0;

    /* Compare input string to static table of supported interfaces */

    for (i = 0; i < ACPI_ARRAY_LENGTH (AcpiInterfacesSupported); i++)
    {
        if (!ACPI_STRCMP (StringDesc->String.Pointer,
                AcpiInterfacesSupported[i].Name))
        {
            /*
             * The interface is supported.
             * Update the OsiData if necessary. We keep track of the latest
             * version of Windows that has been requested by the BIOS.
             */
            if (AcpiInterfacesSupported[i].Value > AcpiGbl_OsiData)
            {
                AcpiGbl_OsiData = AcpiInterfacesSupported[i].Value;
            }

            ReturnValue = ACPI_UINT32_MAX;
            goto Exit;
        }
    }

    /*
     * Did not match the string in the static table, call the host OSL to
     * check for a match with one of the optional strings (such as
     * "Module Device", "3.0 Thermal Model", etc.)
     */
    Status = AcpiOsValidateInterface (StringDesc->String.Pointer);
    if (ACPI_SUCCESS (Status))
    {
        /* The interface is supported */

        ReturnValue = ACPI_UINT32_MAX;
    }


Exit:
    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO,
        "ACPI: BIOS _OSI(%s) is %ssupported\n",
        StringDesc->String.Pointer, ReturnValue == 0 ? "not " : ""));

    /* Complete the return value */

    ReturnDesc->Integer.Value = ReturnValue;
    WalkState->ReturnDesc = ReturnDesc;
    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiUtAcquireMutex (
    ACPI_MUTEX_HANDLE       MutexId)
{
    ACPI_STATUS             Status;
    ACPI_THREAD_ID          ThisThreadId;


    ACPI_FUNCTION_NAME (UtAcquireMutex);


    if (MutexId > ACPI_MAX_MUTEX)
    {
        return (AE_BAD_PARAMETER);
    }

    ThisThreadId = AcpiOsGetThreadId ();

#ifdef ACPI_MUTEX_DEBUG
    {
        UINT32                  i;
        /*
         * Mutex debug code, for internal debugging only.
         *
         * Deadlock prevention. Check if this thread owns any mutexes of value
         * greater than or equal to this one. If so, the thread has violated
         * the mutex ordering rule. This indicates a coding error somewhere in
         * the ACPI subsystem code.
         */
        for (i = MutexId; i < ACPI_NUM_MUTEX; i++)
        {
            if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId)
            {
                if (i == MutexId)
                {
                    ACPI_ERROR ((AE_INFO,
                        "Mutex [%s] already acquired by this thread [%u]",
                        AcpiUtGetMutexName (MutexId),
                        (UINT32) ThisThreadId));

                    return (AE_ALREADY_ACQUIRED);
                }

                ACPI_ERROR ((AE_INFO,
                    "Invalid acquire order: Thread %u owns [%s], wants [%s]",
                    (UINT32) ThisThreadId, AcpiUtGetMutexName (i),
                    AcpiUtGetMutexName (MutexId)));

                return (AE_ACQUIRE_DEADLOCK);
            }
        }
    }
#endif

    ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
        "Thread %u attempting to acquire Mutex [%s]\n",
        (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId)));

    Status = AcpiOsAcquireMutex (AcpiGbl_MutexInfo[MutexId].Mutex,
                ACPI_WAIT_FOREVER);
    if (ACPI_SUCCESS (Status))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u acquired Mutex [%s]\n",
            (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId)));

        AcpiGbl_MutexInfo[MutexId].UseCount++;
        AcpiGbl_MutexInfo[MutexId].ThreadId = ThisThreadId;
    }
    else
    {
        ACPI_EXCEPTION ((AE_INFO, Status,
            "Thread %u could not acquire Mutex [0x%X]",
            (UINT32) ThisThreadId, MutexId));
    }

    return (Status);
}

static ACPI_STATUS
EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event, u_int gen_count)
{
    static int	no_intr = 0;
    ACPI_STATUS	Status;
    int		count, i, need_poll, slp_ival;

    ACPI_SERIAL_ASSERT(ec);
    Status = AE_NO_HARDWARE_RESPONSE;
    need_poll = cold || rebooting || ec_polled_mode || sc->ec_suspending;

    /* Wait for event by polling or GPE (interrupt). */
    if (need_poll) {
        count = (ec_timeout * 1000) / EC_POLL_DELAY;
        if (count == 0)
            count = 1;
        DELAY(10);
        for (i = 0; i < count; i++) {
            Status = EcCheckStatus(sc, "poll", Event);
            if (ACPI_SUCCESS(Status))
                break;
            DELAY(EC_POLL_DELAY);
        }
    } else {
        slp_ival = hz / 1000;
        if (slp_ival != 0) {
            count = ec_timeout;
        } else {
            /* hz has less than 1 ms resolution so scale timeout. */
            slp_ival = 1;
            count = ec_timeout / (1000 / hz);
        }

        /*
         * Wait for the GPE to signal the status changed, checking the
         * status register each time we get one.  It's possible to get a
         * GPE for an event we're not interested in here (i.e., SCI for
         * EC query).
         */
        for (i = 0; i < count; i++) {
            if (gen_count == sc->ec_gencount)
                tsleep(sc, 0, "ecgpe", slp_ival);
            /*
             * Record new generation count.  It's possible the GPE was
             * just to notify us that a query is needed and we need to
             * wait for a second GPE to signal the completion of the
             * event we are actually waiting for.
             */
            Status = EcCheckStatus(sc, "sleep", Event);
            if (ACPI_SUCCESS(Status)) {
                if (gen_count == sc->ec_gencount)
                    no_intr++;
                else
                    no_intr = 0;
                break;
            }
            gen_count = sc->ec_gencount;
        }

        /*
         * We finished waiting for the GPE and it never arrived.  Try to
         * read the register once and trust whatever value we got.  This is
         * the best we can do at this point.
         */
        if (ACPI_FAILURE(Status))
            Status = EcCheckStatus(sc, "sleep_end", Event);
    }
    if (!need_poll && no_intr > 10) {
        device_printf(sc->ec_dev,
                      "not getting interrupts, switched to polled mode\n");
        ec_polled_mode = 1;
    }
    if (ACPI_FAILURE(Status))
        CTR0(KTR_ACPI, "error: ec wait timed out");
    return (Status);
}

static ACPI_STATUS
EcSpaceHandler(UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 Width,
               UINT64 *Value, void *Context, void *RegionContext)
{
    struct acpi_ec_softc	*sc = (struct acpi_ec_softc *)Context;
    ACPI_PHYSICAL_ADDRESS	EcAddr;
    UINT8			*EcData;
    ACPI_STATUS			Status;

    ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);

    if (Function != ACPI_READ && Function != ACPI_WRITE)
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    if (Width % 8 != 0 || Value == NULL || Context == NULL)
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    if (Address + Width / 8 > 256)
        return_ACPI_STATUS (AE_BAD_ADDRESS);

    /*
     * If booting, check if we need to run the query handler.  If so, we
     * we call it directly here since our thread taskq is not active yet.
     */
    if (cold || rebooting || sc->ec_suspending) {
        if ((EC_GET_CSR(sc) & EC_EVENT_SCI)) {
            CTR0(KTR_ACPI, "ec running gpe handler directly");
            EcGpeQueryHandler(sc);
        }
    }

    /* Serialize with EcGpeQueryHandler() at transaction granularity. */
    Status = EcLock(sc);
    if (ACPI_FAILURE(Status))
        return_ACPI_STATUS (Status);

    /* If we can't start burst mode, continue anyway. */
    Status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
    if (ACPI_SUCCESS(Status)) {
        if (EC_GET_DATA(sc) == EC_BURST_ACK) {
            CTR0(KTR_ACPI, "ec burst enabled");
            sc->ec_burstactive = TRUE;
        }
    }

    /* Perform the transaction(s), based on Width. */
    EcAddr = Address;
    EcData = (UINT8 *)Value;
    if (Function == ACPI_READ)
        *Value = 0;
    do {
        switch (Function) {
        case ACPI_READ:
            Status = EcRead(sc, EcAddr, EcData);
            break;
        case ACPI_WRITE:
            Status = EcWrite(sc, EcAddr, *EcData);
            break;
        }
        if (ACPI_FAILURE(Status))
            break;
        EcAddr++;
        EcData++;
    } while (EcAddr < Address + Width / 8);

    if (sc->ec_burstactive) {
        sc->ec_burstactive = FALSE;
        if (ACPI_SUCCESS(EcCommand(sc, EC_COMMAND_BURST_DISABLE)))
            CTR0(KTR_ACPI, "ec disabled burst ok");
    }

    EcUnlock(sc);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
DisplayOneDevice (ACPI_HANDLE ObjHandle, UINT32 Level, void *Context,
                  void **RetVal)
{
  ACPI_STATUS Status;
  ACPI_DEVICE_INFO *Info;
  ACPI_BUFFER Path;
  ACPI_BUFFER Result;
  ACPI_OBJECT Obj;
  char Buffer[256];
  uint8 prt_buf[1024];
  ACPI_BUFFER Prt = { .Length = sizeof (prt_buf), .Pointer = prt_buf };
  ACPI_PCI_ROUTING_TABLE *prtd;
  uint32 addr=0;
  uint32 fun = 0;
  bool pcibus=FALSE;
  u8 busnum;

  Path.Length = sizeof (Buffer);
  Path.Pointer = Buffer;

  Status = AcpiGetName (ObjHandle, ACPI_FULL_PATHNAME, &Path);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 ("%s: \n", Path.Pointer);
  }
  Status = AcpiGetObjectInfo (ObjHandle, &Info);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 ("    ");
    if (Info->Flags & ACPI_PCI_ROOT_BRIDGE) {
      DLOG_COM1 (" PCI_ROOT");
      busnum = 0;
      pcibus = TRUE;
    }
    if (Info->Valid & ACPI_VALID_STA)
      DLOG_COM1 (" STA %.8X", Info->CurrentStatus);
    if (Info->Valid & ACPI_VALID_ADR) {
      DLOG_COM1 (" ADR %.8X", Info->Address);
      addr = Info->Address >> 16;
      fun = Info->Address & 0x7;
    }
    if (Info->Valid & ACPI_VALID_HID)
      DLOG_COM1 (" HID %s", Info->HardwareId.String);
    if (Info->Valid & ACPI_VALID_UID)
      DLOG_COM1 (" UID %s", Info->UniqueId.String);
    if (Info->Valid & ACPI_VALID_CID)
      DLOG_COM1 (" CID");

    ACPI_FREE (Info);
  }

  Result.Length = sizeof (Obj);
  Result.Pointer = &Obj;
  Status =
    AcpiEvaluateObjectTyped (ObjHandle, "_DDN", NULL, &Result,
                             ACPI_TYPE_STRING);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 (" DDN=%s", Obj.String.Pointer);
  }

  Result.Length = sizeof (Obj);
  Result.Pointer = &Obj;
  Status =
    AcpiEvaluateObjectTyped (ObjHandle, "_STR", NULL, &Result,
                             ACPI_TYPE_STRING);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 (" STR=%s", Obj.String.Pointer);
  }

  Result.Length = sizeof (Obj);
  Result.Pointer = &Obj;
  Status =
    AcpiEvaluateObjectTyped (ObjHandle, "_MLS", NULL, &Result,
                             ACPI_TYPE_STRING);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 (" MLS=%s", Obj.String.Pointer);
  }

  Status =
    AcpiEvaluateObjectTyped (ObjHandle, "_BBN", NULL, &Result,
                             ACPI_TYPE_INTEGER);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 (" BBN=%d", Obj.Integer.Value);
  } else if (Status != AE_NOT_FOUND)
    DLOG_COM1 (" bbnERR=%d", Status);

  Status =
    AcpiEvaluateObjectTyped (ObjHandle, "_PXM", NULL, &Result,
                             ACPI_TYPE_INTEGER);
  if (ACPI_SUCCESS (Status)) {
    DLOG_COM1 (" PXM=%d", Obj.Integer.Value);
  } else if (Status != AE_NOT_FOUND)
    DLOG_COM1 (" pxmERR=%d", Status);


  DLOG_COM1 ("\n");

  for (;;) {
    Status = AcpiGetIrqRoutingTable (ObjHandle, &Prt);
    if (ACPI_FAILURE (Status)) {
      if (Status == AE_BUFFER_OVERFLOW) {
//.........这里部分代码省略.........

static int __init pnpacpi_add_device(struct acpi_device *device)
{
	acpi_handle temp = NULL;
	acpi_status status;
	struct pnp_dev *dev;

	/*
	 * If a PnPacpi device is not present , the device
	 * driver should not be loaded.
	 */
	status = acpi_get_handle(device->handle, "_CRS", &temp);
	if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
	    is_exclusive_device(device) || (!device->status.present))
		return 0;

	dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
	if (!dev)
		return -ENOMEM;

	dev->data = device->handle;
	/* .enabled means the device can decode the resources */
	dev->active = device->status.enabled;
	status = acpi_get_handle(device->handle, "_SRS", &temp);
	if (ACPI_SUCCESS(status))
		dev->capabilities |= PNP_CONFIGURABLE;
	dev->capabilities |= PNP_READ;
	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
		dev->capabilities |= PNP_WRITE;
	if (device->flags.removable)
		dev->capabilities |= PNP_REMOVABLE;
	status = acpi_get_handle(device->handle, "_DIS", &temp);
	if (ACPI_SUCCESS(status))
		dev->capabilities |= PNP_DISABLE;

	if (strlen(acpi_device_name(device)))
		strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	else
		strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));

	if (dev->active)
		pnpacpi_parse_allocated_resource(dev);

	if (dev->capabilities & PNP_CONFIGURABLE)
		pnpacpi_parse_resource_option_data(dev);

	if (device->flags.compatible_ids) {
		struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
		int i;

		for (i = 0; i < cid_list->count; i++) {
			if (!ispnpidacpi(cid_list->id[i].value))
				continue;
			pnp_add_id(dev, cid_list->id[i].value);
		}
	}

	/* clear out the damaged flags */
	if (!dev->active)
		pnp_init_resources(dev);
	pnp_add_device(dev);
	num++;

	return AE_OK;
}

static void acpi_bus_osc_support(void)
{
	u32 capbuf[2];
	struct acpi_osc_context context = {
		.uuid_str = sb_uuid_str,
		.rev = 1,
		.cap.length = 8,
		.cap.pointer = capbuf,
	};
	acpi_handle handle;

	capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
	capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
			defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
	capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
#endif

#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
	capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
#endif
	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
		return;

	if (is_uv_system() && is_kdump_kernel()) {
		/*
		 * There is no need to parse the OS Capabilities table
		 * in the crash kernel. And it should not be done, as
		 * that parsing includes destructive writes to io ports to
		 * initialize UV system controller interrupts.
		 */
		return;
	}

	if (ACPI_SUCCESS(acpi_run_osc(handle, &context)))
		kfree(context.ret.pointer);
	/* do we need to check the returned cap? Sounds no */
}

/* --------------------------------------------------------------------------
                                Event Management
   -------------------------------------------------------------------------- */

#ifdef CONFIG_ACPI_PROC_EVENT
static DEFINE_SPINLOCK(acpi_bus_event_lock);

LIST_HEAD(acpi_bus_event_list);
DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);

extern int event_is_open;

int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
{
	struct acpi_bus_event *event;
	unsigned long flags = 0;

	/* drop event on the floor if no one's listening */
	if (!event_is_open)
		return 0;

	event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
	if (!event)
		return -ENOMEM;

	strcpy(event->device_class, device_class);
	strcpy(event->bus_id, bus_id);
	event->type = type;
	event->data = data;

	spin_lock_irqsave(&acpi_bus_event_lock, flags);
	list_add_tail(&event->node, &acpi_bus_event_list);
	spin_unlock_irqrestore(&acpi_bus_event_lock, flags);

	wake_up_interruptible(&acpi_bus_event_queue);

	return 0;

}

EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);

int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
{
	if (!device)
		return -EINVAL;
	return acpi_bus_generate_proc_event4(device->pnp.device_class,
					     device->pnp.bus_id, type, data);
}

EXPORT_SYMBOL(acpi_bus_generate_proc_event);

int acpi_bus_receive_event(struct acpi_bus_event *event)
{
	unsigned long flags = 0;
	struct acpi_bus_event *entry = NULL;

	DECLARE_WAITQUEUE(wait, current);


	if (!event)
//.........这里部分代码省略.........

ACPI_STATUS
DtCompileGeneric (
    void                    **List)
{
    ACPI_STATUS             Status;
    DT_SUBTABLE             *Subtable;
    DT_SUBTABLE             *ParentTable;
    DT_FIELD                **PFieldList = (DT_FIELD **) List;
    ACPI_DMTABLE_INFO       *Info;


    ParentTable = DtPeekSubtable ();

    /*
     * Compile the "generic" portion of the table. This
     * part of the table is not predefined and any of the generic
     * operators may be used.
     */

    /* Find any and all labels in the entire generic portion */

    DtDetectAllLabels (*PFieldList);

    /* Now we can actually compile the parse tree */

    while (*PFieldList)
    {
        Info = DtGetGenericTableInfo ((*PFieldList)->Name);
        if (!Info)
        {
            sprintf (MsgBuffer, "Generic data type \"%s\" not found",
                (*PFieldList)->Name);
            DtNameError (ASL_ERROR, ASL_MSG_INVALID_FIELD_NAME,
                (*PFieldList), MsgBuffer);

            *PFieldList = (*PFieldList)->Next;
            continue;
        }

        Status = DtCompileTable (PFieldList, Info,
                    &Subtable, TRUE);
        if (ACPI_SUCCESS (Status))
        {
            DtInsertSubtable (ParentTable, Subtable);
        }
        else
        {
            *PFieldList = (*PFieldList)->Next;

            if (Status == AE_NOT_FOUND)
            {
                sprintf (MsgBuffer, "Generic data type \"%s\" not found",
                    (*PFieldList)->Name);
                DtNameError (ASL_ERROR, ASL_MSG_INVALID_FIELD_NAME,
                    (*PFieldList), MsgBuffer);
            }
        }
    }

    return (AE_OK);
}