C++ ACPI_EXCEPTION函数代码示例

ACPI_STATUS
AcpiEnterSleepStatePrep (
    UINT8                   SleepState)
{
    ACPI_STATUS             Status;
    ACPI_OBJECT_LIST        ArgList;
    ACPI_OBJECT             Arg;


    ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep);


    /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */

    Status = AcpiGetSleepTypeData (SleepState,
                    &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Execute the _PTS method (Prepare To Sleep) */

    ArgList.Count = 1;
    ArgList.Pointer = &Arg;
    Arg.Type = ACPI_TYPE_INTEGER;
    Arg.Integer.Value = SleepState;

    Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL);
    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
    {
        return_ACPI_STATUS (Status);
    }

    /* Setup the argument to the _SST method (System STatus) */

    switch (SleepState)
    {
    case ACPI_STATE_S0:
        Arg.Integer.Value = ACPI_SST_WORKING;
        break;

    case ACPI_STATE_S1:
    case ACPI_STATE_S2:
    case ACPI_STATE_S3:
        Arg.Integer.Value = ACPI_SST_SLEEPING;
        break;

    case ACPI_STATE_S4:
        Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT;
        break;

    default:
        Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */
        break;
    }

    /*
     * Set the system indicators to show the desired sleep state.
     * _SST is an optional method (return no error if not found)
     */
    Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While executing method _SST"));
    }

    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiDsInitializeObjects (
    UINT32                  TableIndex,
    ACPI_NAMESPACE_NODE     *StartNode)
{
    ACPI_STATUS             Status;
    ACPI_INIT_WALK_INFO     Info;
    ACPI_TABLE_HEADER       *Table;
    ACPI_OWNER_ID           OwnerId;


    ACPI_FUNCTION_TRACE (DsInitializeObjects);


    Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "**** Starting initialization of namespace objects ****\n"));
    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:"));

    /* Set all init info to zero */

    ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));

    Info.OwnerId = OwnerId;
    Info.TableIndex = TableIndex;

    /* Walk entire namespace from the supplied root */

    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * We don't use AcpiWalkNamespace since we do not want to acquire
     * the namespace reader lock.
     */
    Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, StartNode, ACPI_UINT32_MAX,
                ACPI_NS_WALK_UNLOCK, AcpiDsInitOneObject, NULL, &Info, NULL);
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
    }
    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);

    Status = AcpiGetTableByIndex (TableIndex, &Table);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
        "\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
        Table->Signature, OwnerId, Info.ObjectCount,
        Info.DeviceCount, Info.MethodCount, Info.OpRegionCount));

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "%u Methods, %u Regions\n", Info.MethodCount, Info.OpRegionCount));

    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiEvInitializeGpeBlock (
    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
    ACPI_GPE_BLOCK_INFO     *GpeBlock,
    void                    *Ignored)
{
    ACPI_STATUS             Status;
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    UINT32                  GpeEnabledCount;
    UINT32                  GpeIndex;
    UINT32                  i;
    UINT32                  j;


    ACPI_FUNCTION_TRACE (EvInitializeGpeBlock);


    /*
     * Ignore a null GPE block (e.g., if no GPE block 1 exists), and
     * any GPE blocks that have been initialized already.
     */
    if (!GpeBlock || GpeBlock->Initialized)
    {
        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Enable all GPEs that have a corresponding method and have the
     * ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
     * must be enabled via the acpi_enable_gpe() interface.
     */
    GpeEnabledCount = 0;

    for (i = 0; i < GpeBlock->RegisterCount; i++)
    {
        for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
        {
            /* Get the info block for this particular GPE */

            GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
            GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];

            /*
             * Ignore GPEs that have no corresponding _Lxx/_Exx method
             * and GPEs that are used to wake the system
             */
            if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == ACPI_GPE_DISPATCH_NONE) ||
                (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == ACPI_GPE_DISPATCH_HANDLER) ||
                (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == ACPI_GPE_DISPATCH_RAW_HANDLER) ||
                (GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
            {
                continue;
            }

            Status = AcpiEvAddGpeReference (GpeEventInfo);
            if (ACPI_FAILURE (Status))
            {
                ACPI_EXCEPTION ((AE_INFO, Status,
                    "Could not enable GPE 0x%02X",
                    GpeIndex + GpeBlock->BlockBaseNumber));
                continue;
            }

            GpeEnabledCount++;
        }
    }

    if (GpeEnabledCount)
    {
        ACPI_INFO ((AE_INFO,
            "Enabled %u GPEs in block %02X to %02X", GpeEnabledCount,
            (UINT32) GpeBlock->BlockBaseNumber,
            (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1))));
    }

    GpeBlock->Initialized = TRUE;
    return_ACPI_STATUS (AE_OK);
}

static ACPI_STATUS
AcpiDbExecuteMethod (
    ACPI_DB_METHOD_INFO     *Info,
    ACPI_BUFFER             *ReturnObj)
{
    ACPI_STATUS             Status;
    ACPI_OBJECT_LIST        ParamObjects;
    ACPI_OBJECT             Params[ACPI_DEBUGGER_MAX_ARGS + 1];
    UINT32                  i;


    ACPI_FUNCTION_TRACE (DbExecuteMethod);


    if (AcpiGbl_DbOutputToFile && !AcpiDbgLevel)
    {
        AcpiOsPrintf ("Warning: debug output is not enabled!\n");
    }

    ParamObjects.Count = 0;
    ParamObjects.Pointer = NULL;

    /* Pass through any command-line arguments */

    if (Info->Args && Info->Args[0])
    {
        /* Get arguments passed on the command line */

        for (i = 0; (Info->Args[i] && *(Info->Args[i])); i++)
        {
            /* Convert input string (token) to an actual ACPI_OBJECT */

            Status = AcpiDbConvertToObject (Info->Types[i],
                Info->Args[i], &Params[i]);
            if (ACPI_FAILURE (Status))
            {
                ACPI_EXCEPTION ((AE_INFO, Status,
                    "While parsing method arguments"));
                goto Cleanup;
            }
        }

        ParamObjects.Count = i;
        ParamObjects.Pointer = Params;
    }

    /* Prepare for a return object of arbitrary size */

    ReturnObj->Pointer = AcpiGbl_DbBuffer;
    ReturnObj->Length  = ACPI_DEBUG_BUFFER_SIZE;

    /* Do the actual method execution */

    AcpiGbl_MethodExecuting = TRUE;
    Status = AcpiEvaluateObject (NULL, Info->Pathname,
        &ParamObjects, ReturnObj);

    AcpiGbl_CmSingleStep = FALSE;
    AcpiGbl_MethodExecuting = FALSE;

    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status,
            "while executing %s from debugger", Info->Pathname));

        if (Status == AE_BUFFER_OVERFLOW)
        {
            ACPI_ERROR ((AE_INFO,
                "Possible overflow of internal debugger "
                "buffer (size 0x%X needed 0x%X)",
                ACPI_DEBUG_BUFFER_SIZE, (UINT32) ReturnObj->Length));
        }
    }

Cleanup:
    AcpiDbDeleteObjects (ParamObjects.Count, Params);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDsGetPredicateValue (
    ACPI_WALK_STATE         *WalkState,
    ACPI_OPERAND_OBJECT     *ResultObj)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;


    ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);


    WalkState->ControlState->Common.State = 0;

    if (ResultObj)
    {
        Status = AcpiDsResultPop (&ObjDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "Could not get result from predicate evaluation"));

            return_ACPI_STATUS (Status);
        }
    }
    else
    {
        Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        ObjDesc = WalkState->Operands [0];
    }

    if (!ObjDesc)
    {
        ACPI_ERROR ((AE_INFO,
            "No predicate ObjDesc=%p State=%p",
            ObjDesc, WalkState));

        return_ACPI_STATUS (AE_AML_NO_OPERAND);
    }

    /*
     * Result of predicate evaluation must be an Integer
     * object. Implicitly convert the argument if necessary.
     */
    Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
    {
        ACPI_ERROR ((AE_INFO,
            "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
            ObjDesc, WalkState, ObjDesc->Common.Type));

        Status = AE_AML_OPERAND_TYPE;
        goto Cleanup;
    }

    /* Truncate the predicate to 32-bits if necessary */

    AcpiExTruncateFor32bitTable (LocalObjDesc);

    /*
     * Save the result of the predicate evaluation on
     * the control stack
     */
    if (LocalObjDesc->Integer.Value)
    {
        WalkState->ControlState->Common.Value = TRUE;
    }
    else
    {
        /*
         * Predicate is FALSE, we will just toss the
         * rest of the package
         */
        WalkState->ControlState->Common.Value = FALSE;
        Status = AE_CTRL_FALSE;
    }

    /* Predicate can be used for an implicit return value */

    (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);


Cleanup:
//.........这里部分代码省略.........

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_gpe_initialize
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
 *
 ******************************************************************************/
acpi_status acpi_ev_gpe_initialize(void)
{
	u32 register_count0 = 0;
	u32 register_count1 = 0;
	u32 gpe_number_max = 0;
	acpi_status status;

	ACPI_FUNCTION_TRACE(ev_gpe_initialize);

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * Initialize the GPE Block(s) defined in the FADT
	 *
	 * 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."
	 */

	/*
	 * 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 (acpi_gbl_FADT.gpe0_block_length &&
	    acpi_gbl_FADT.xgpe0_block.address) {

		/* GPE block 0 exists (has both length and address > 0) */

		register_count0 = (u16)(acpi_gbl_FADT.gpe0_block_length / 2);

		gpe_number_max =
		    (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;

		/* Install GPE Block 0 */

		status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
						  &acpi_gbl_FADT.xgpe0_block,
						  register_count0, 0,
						  acpi_gbl_FADT.sci_interrupt,
						  &acpi_gbl_gpe_fadt_blocks[0]);

		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Could not create GPE Block 0"));
		}
	}

	if (acpi_gbl_FADT.gpe1_block_length &&
	    acpi_gbl_FADT.xgpe1_block.address) {

		/* GPE block 1 exists (has both length and address > 0) */

		register_count1 = (u16)(acpi_gbl_FADT.gpe1_block_length / 2);

		/* Check for GPE0/GPE1 overlap (if both banks exist) */

		if ((register_count0) &&
		    (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
			ACPI_ERROR((AE_INFO,
				    "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
				    "(GPE %u to %u) - Ignoring GPE1",
				    gpe_number_max, acpi_gbl_FADT.gpe1_base,
				    acpi_gbl_FADT.gpe1_base +
				    ((register_count1 *
				      ACPI_GPE_REGISTER_WIDTH) - 1)));

			/* Ignore GPE1 block by setting the register count to zero */

			register_count1 = 0;
		} else {
			/* Install GPE Block 1 */

			status =
//.........这里部分代码省略.........

void
AcpiEvDetachRegion (
    ACPI_OPERAND_OBJECT     *RegionObj,
    BOOLEAN                 AcpiNsIsLocked)
{
    ACPI_OPERAND_OBJECT     *HandlerObj;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *StartDesc;
    ACPI_OPERAND_OBJECT     **LastObjPtr;
    ACPI_ADR_SPACE_SETUP    RegionSetup;
    void                    **RegionContext;
    ACPI_OPERAND_OBJECT     *RegionObj2;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (EvDetachRegion);


    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
    if (!RegionObj2)
    {
        return_VOID;
    }
    RegionContext = &RegionObj2->Extra.RegionContext;

    /* Get the address handler from the region object */

    HandlerObj = RegionObj->Region.Handler;
    if (!HandlerObj)
    {
        /* This region has no handler, all done */

        return_VOID;
    }

    /* Find this region in the handler's list */

    ObjDesc = HandlerObj->AddressSpace.RegionList;
    StartDesc = ObjDesc;
    LastObjPtr = &HandlerObj->AddressSpace.RegionList;

    while (ObjDesc)
    {
        /* Is this the correct Region? */

        if (ObjDesc == RegionObj)
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
                "Removing Region %p from address handler %p\n",
                RegionObj, HandlerObj));

            /* This is it, remove it from the handler's list */

            *LastObjPtr = ObjDesc->Region.Next;
            ObjDesc->Region.Next = NULL;        /* Must clear field */

            if (AcpiNsIsLocked)
            {
                Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
                if (ACPI_FAILURE (Status))
                {
                    return_VOID;
                }
            }

            /* Now stop region accesses by executing the _REG method */

            Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_DISCONNECT);
            if (ACPI_FAILURE (Status))
            {
                ACPI_EXCEPTION ((AE_INFO, Status, "from region _REG, [%s]",
                    AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            }

            if (AcpiNsIsLocked)
            {
                Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
                if (ACPI_FAILURE (Status))
                {
                    return_VOID;
                }
            }

            /*
             * If the region has been activated, call the setup handler with
             * the deactivate notification
             */
            if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
            {
                RegionSetup = HandlerObj->AddressSpace.Setup;
                Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE,
                    HandlerObj->AddressSpace.Context, RegionContext);

                /*
                 * RegionContext should have been released by the deactivate
                 * operation. We don't need access to it anymore here.
                 */
                if (RegionContext)
                {
                    *RegionContext = NULL;
//.........这里部分代码省略.........

acpi_status
acpi_ds_initialize_objects(u32 table_index,
			   struct acpi_namespace_node * start_node)
{
	acpi_status status;
	struct acpi_init_walk_info info;
	struct acpi_table_header *table;
	acpi_owner_id owner_id;

	ACPI_FUNCTION_TRACE(ds_initialize_objects);

	status = acpi_tb_get_owner_id(table_index, &owner_id);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "**** Starting initialization of namespace objects ****\n"));
	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));

	/* Set all init info to zero */

	ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));

	info.owner_id = owner_id;
	info.table_index = table_index;

	/* Walk entire namespace from the supplied root */

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * We don't use acpi_walk_namespace since we do not want to acquire
	 * the namespace reader lock.
	 */
	status =
	    acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
				   ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object,
				   NULL, &info, NULL);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
	}
	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

	status = acpi_get_table_by_index(table_index, &table);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
			      "\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
			      table->signature, owner_id, info.object_count,
			      info.device_count, info.method_count,
			      info.op_region_count));

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "%u Methods, %u Regions\n", info.method_count,
			  info.op_region_count));

	return_ACPI_STATUS(AE_OK);
}

static acpi_status
acpi_ds_init_one_object(acpi_handle obj_handle,
			u32 level, void *context, void **return_value)
{
	struct acpi_init_walk_info *info =
	    (struct acpi_init_walk_info *)context;
	struct acpi_namespace_node *node =
	    (struct acpi_namespace_node *)obj_handle;
	acpi_object_type type;
	acpi_status status;

	ACPI_FUNCTION_ENTRY();

	/*
	 * We are only interested in NS nodes owned by the table that
	 * was just loaded
	 */
	if (node->owner_id != info->owner_id) {
		return (AE_OK);
	}

	info->object_count++;

	/* And even then, we are only interested in a few object types */

	type = acpi_ns_get_type(obj_handle);

	switch (type) {
	case ACPI_TYPE_REGION:

		status = acpi_ds_initialize_region(obj_handle);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"During Region initialization %p [%4.4s]",
					obj_handle,
					acpi_ut_get_node_name(obj_handle)));
		}

		info->op_region_count++;
		break;

	case ACPI_TYPE_METHOD:

		info->method_count++;
		break;

	case ACPI_TYPE_DEVICE:

		info->device_count++;
		break;

	default:
		break;
	}

	/*
	 * We ignore errors from above, and always return OK, since
	 * we don't want to abort the walk on a single error.
	 */
	return (AE_OK);
}

static int read_capabilities(struct acpi_power_meter_resource *resource)
{
	int res = 0;
	int i;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	struct acpi_buffer state = { 0, NULL };
	struct acpi_buffer format = { sizeof("NNNNNNNNNNN"), "NNNNNNNNNNN" };
	union acpi_object *pss;
	acpi_string *str;
	acpi_status status;

	status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMC", NULL,
				      &buffer);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMC"));
		return -ENODEV;
	}

	pss = buffer.pointer;
	if (!pss ||
	    pss->type != ACPI_TYPE_PACKAGE ||
	    pss->package.count != 14) {
		dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
			"Invalid _PMC data\n");
		res = -EFAULT;
		goto end;
	}

	/* Grab all the integer data at once */
	state.length = sizeof(struct acpi_power_meter_capabilities);
	state.pointer = &resource->caps;

	status = acpi_extract_package(pss, &format, &state);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "Invalid data"));
		res = -EFAULT;
		goto end;
	}

	if (resource->caps.units) {
		dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
			"Unknown units %llu.\n",
			resource->caps.units);
		res = -EINVAL;
		goto end;
	}

	/* Grab the string data */
	str = &resource->model_number;

	for (i = 11; i < 14; i++) {
		union acpi_object *element = &(pss->package.elements[i]);

		if (element->type != ACPI_TYPE_STRING) {
			res = -EINVAL;
			goto error;
		}

		*str = kzalloc(sizeof(u8) * (element->string.length + 1),
			       GFP_KERNEL);
		if (!*str) {
			res = -ENOMEM;
			goto error;
		}

		strncpy(*str, element->string.pointer, element->string.length);
		str++;
	}

	dev_info(&resource->acpi_dev->dev, "Found ACPI power meter.\n");
	goto end;
error:
	str = &resource->model_number;
	for (i = 0; i < 3; i++, str++)
		kfree(*str);
end:
	kfree(buffer.pointer);
	return res;
}

ACPI_STATUS
AcpiEvPciConfigRegionSetup (
    ACPI_HANDLE             Handle,
    UINT32                  Function,
    void                    *HandlerContext,
    void                    **RegionContext)
{
    ACPI_STATUS             Status = AE_OK;
    UINT64                  PciValue;
    ACPI_PCI_ID             *PciId = *RegionContext;
    ACPI_OPERAND_OBJECT     *HandlerObj;
    ACPI_NAMESPACE_NODE     *ParentNode;
    ACPI_NAMESPACE_NODE     *PciRootNode;
    ACPI_NAMESPACE_NODE     *PciDeviceNode;
    ACPI_OPERAND_OBJECT     *RegionObj = (ACPI_OPERAND_OBJECT  *) Handle;


    ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup);


    HandlerObj = RegionObj->Region.Handler;
    if (!HandlerObj)
    {
        /*
         * No installed handler. This shouldn't happen because the dispatch
         * routine checks before we get here, but we check again just in case.
         */
        ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
            "Attempting to init a region %p, with no handler\n", RegionObj));
        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    *RegionContext = NULL;
    if (Function == ACPI_REGION_DEACTIVATE)
    {
        if (PciId)
        {
            ACPI_FREE (PciId);
        }
        return_ACPI_STATUS (Status);
    }

    ParentNode = RegionObj->Region.Node->Parent;

    /*
     * Get the _SEG and _BBN values from the device upon which the handler
     * is installed.
     *
     * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
     * This is the device the handler has been registered to handle.
     */

    /*
     * If the AddressSpace.Node is still pointing to the root, we need
     * to scan upward for a PCI Root bridge and re-associate the OpRegion
     * handlers with that device.
     */
    if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode)
    {
        /* Start search from the parent object */

        PciRootNode = ParentNode;
        while (PciRootNode != AcpiGbl_RootNode)
        {
            /* Get the _HID/_CID in order to detect a RootBridge */

            if (AcpiEvIsPciRootBridge (PciRootNode))
            {
                /* Install a handler for this PCI root bridge */
              
                Status = AcpiInstallAddressSpaceHandler (
                    (ACPI_HANDLE) PciRootNode,
                    ACPI_ADR_SPACE_PCI_CONFIG,
                    ACPI_DEFAULT_HANDLER, NULL, NULL);
                if (ACPI_FAILURE (Status))
                {
                    if (Status == AE_SAME_HANDLER)
                    {
                        /*
                         * It is OK if the handler is already installed on the
                         * root bridge. Still need to return a context object
                         * for the new PCI_Config operation region, however.
                         */
                        Status = AE_OK;
                    }
                    else
                    {
                        ACPI_EXCEPTION ((AE_INFO, Status,
                            "Could not install PciConfig handler "
                            "for Root Bridge %4.4s",
                            AcpiUtGetNodeName (PciRootNode)));
                    }
                }
                break;
            }

            PciRootNode = PciRootNode->Parent;
        }

        /* PCI root bridge not found, use namespace root node */
//.........这里部分代码省略.........

static int read_domain_devices(struct acpi_power_meter_resource *resource)
{
	int res = 0;
	int i;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *pss;
	acpi_status status;

	status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMD", NULL,
				      &buffer);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMD"));
		return -ENODEV;
	}

	pss = buffer.pointer;
	if (!pss ||
	    pss->type != ACPI_TYPE_PACKAGE) {
		dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
			"Invalid _PMD data\n");
		res = -EFAULT;
		goto end;
	}

	if (!pss->package.count)
		goto end;

	resource->domain_devices = kzalloc(sizeof(struct acpi_device *) *
					   pss->package.count, GFP_KERNEL);
	if (!resource->domain_devices) {
		res = -ENOMEM;
		goto end;
	}

	resource->holders_dir = kobject_create_and_add("measures",
					&resource->acpi_dev->dev.kobj);
	if (!resource->holders_dir) {
		res = -ENOMEM;
		goto exit_free;
	}

	resource->num_domain_devices = pss->package.count;

	for (i = 0; i < pss->package.count; i++) {
		struct acpi_device *obj;
		union acpi_object *element = &(pss->package.elements[i]);

		/* Refuse non-references */
		if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
			continue;

		/* Create a symlink to domain objects */
		resource->domain_devices[i] = NULL;
		status = acpi_bus_get_device(element->reference.handle,
					     &resource->domain_devices[i]);
		if (ACPI_FAILURE(status))
			continue;

		obj = resource->domain_devices[i];
		get_device(&obj->dev);

		res = sysfs_create_link(resource->holders_dir, &obj->dev.kobj,
				      kobject_name(&obj->dev.kobj));
		if (res) {
			put_device(&obj->dev);
			resource->domain_devices[i] = NULL;
		}
	}

	res = 0;
	goto end;

exit_free:
	kfree(resource->domain_devices);
end:
	kfree(buffer.pointer);
	return res;
}

//.........这里部分代码省略.........
		break;

	case ACPI_NOTIFY_DEVICE_WAKE:
		acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
		break;

	case ACPI_NOTIFY_EJECT_REQUEST:
		acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
		hotplug_event = true;
		break;

	case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
		acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
		/* TBD: Exactly what does 'light' mean? */
		break;

	case ACPI_NOTIFY_FREQUENCY_MISMATCH:
		acpi_handle_err(handle, "Device cannot be configured due "
				"to a frequency mismatch\n");
		break;

	case ACPI_NOTIFY_BUS_MODE_MISMATCH:
		acpi_handle_err(handle, "Device cannot be configured due "
				"to a bus mode mismatch\n");
		break;

	case ACPI_NOTIFY_POWER_FAULT:
		acpi_handle_err(handle, "Device has suffered a power fault\n");
		break;

	default:
		acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
		break;
	}

	adev = acpi_bus_get_acpi_device(handle);
	if (!adev)
		goto err;

	driver = adev->driver;
	if (driver && driver->ops.notify &&
	    (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
		driver->ops.notify(adev, type);

	if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
		return;

	acpi_bus_put_acpi_device(adev);
	return;

 err:
	acpi_evaluate_ost(handle, type, ost_code, NULL);
}

/* --------------------------------------------------------------------------
                             Initialization/Cleanup
   -------------------------------------------------------------------------- */

static int __init acpi_bus_init_irq(void)
{
	acpi_status status;
	char *message = NULL;


	/*
	 * Let the system know what interrupt model we are using by
	 * evaluating the \_PIC object, if exists.
	 */

	switch (acpi_irq_model) {
	case ACPI_IRQ_MODEL_PIC:
		message = "PIC";
		break;
	case ACPI_IRQ_MODEL_IOAPIC:
		message = "IOAPIC";
		break;
	case ACPI_IRQ_MODEL_IOSAPIC:
		message = "IOSAPIC";
		break;
	case ACPI_IRQ_MODEL_GIC:
		message = "GIC";
		break;
	case ACPI_IRQ_MODEL_PLATFORM:
		message = "platform specific model";
		break;
	default:
		printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
		return -ENODEV;
	}

	printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);

	status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
		return -ENODEV;
	}

	return 0;
}

ACPI_STATUS
AcpiLeaveSleepState (
    UINT8                   SleepState)
{
    ACPI_OBJECT_LIST        ArgList;
    ACPI_OBJECT             Arg;
    ACPI_STATUS             Status;
    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
    UINT32                  Pm1aControl;
    UINT32                  Pm1bControl;


    ACPI_FUNCTION_TRACE (AcpiLeaveSleepState);


    /*
     * Set SLP_TYPE and SLP_EN to state S0.
     * This is unclear from the ACPI Spec, but it is required
     * by some machines.
     */
    Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
                    &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
    if (ACPI_SUCCESS (Status))
    {
        SleepTypeRegInfo =
            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
        SleepEnableRegInfo =
            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);

        /* Get current value of PM1A control */

        Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
                    &Pm1aControl);
        if (ACPI_SUCCESS (Status))
        {
            /* Clear the SLP_EN and SLP_TYP fields */

            Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
                SleepEnableRegInfo->AccessBitMask);
            Pm1bControl = Pm1aControl;

            /* Insert the SLP_TYP bits */

            Pm1aControl |= (AcpiGbl_SleepTypeA <<
                SleepTypeRegInfo->BitPosition);
            Pm1bControl |= (AcpiGbl_SleepTypeB <<
                SleepTypeRegInfo->BitPosition);

            /* Write the control registers and ignore any errors */

            (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
        }
    }

    /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */

    AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;

    /* Setup parameter object */

    ArgList.Count = 1;
    ArgList.Pointer = &Arg;
    Arg.Type = ACPI_TYPE_INTEGER;

    /* Ignore any errors from these methods */

    Arg.Integer.Value = ACPI_SST_WAKING;
    Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST"));
    }

    Arg.Integer.Value = SleepState;
    Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL);
    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS"));
    }

    Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL);
    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK"));
    }
    /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */

    /*
     * Restore the GPEs:
     * 1) Disable/Clear all GPEs
     * 2) Enable all runtime GPEs
     */
    Status = AcpiHwDisableAllGpes ();
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
    AcpiGbl_SystemAwakeAndRunning = TRUE;

//.........这里部分代码省略.........

static ACPI_STATUS InitializeFullAcpi (void)
{
    ACPI_STATUS             Status;


    /* Initialize the ACPICA subsystem */

    Status = AcpiInitializeSubsystem ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While initializing ACPICA"));
        return (Status);
    }

    /* Initialize the ACPICA Table Manager and get all ACPI tables */

    Status = AcpiInitializeTables (NULL, 0, FALSE);
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While initializing Table Manager"));
        return (Status);
    }

    /* Create the ACPI namespace from ACPI tables */

    Status = AcpiLoadTables ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While loading ACPI tables"));
        return (Status);
    }

    /* Install local handlers */

    Status = InstallHandlers ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While installing handlers"));
        return (Status);
    }

    /* Initialize the ACPI hardware */

    Status = AcpiEnableSubsystem (ACPI_FULL_INITIALIZATION);
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While enabling ACPICA"));
        return (Status);
    }

    /* Complete the ACPI namespace object initialization */

    Status = AcpiInitializeObjects (ACPI_FULL_INITIALIZATION);
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While initializing ACPICA objects"));
        return (Status);
    }

    return (AE_OK);
}