ACPI_STATUS
AcpiNsInitializeDevices (
void)
{
ACPI_STATUS Status;
ACPI_DEVICE_WALK_INFO Info;
ACPI_FUNCTION_TRACE (NsInitializeDevices);
/* Init counters */
Info.DeviceCount = 0;
Info.Num_STA = 0;
Info.Num_INI = 0;
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Initializing Device/Processor/Thermal objects "
"and executing _INI/_STA methods:\n"));
/* Tree analysis: find all subtrees that contain _INI methods */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
/* Allocate the evaluation information block */
Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info.EvaluateInfo)
{
Status = AE_NO_MEMORY;
goto ErrorExit;
}
/*
* Execute the "global" _INI method that may appear at the root. This
* support is provided for Windows compatibility (Vista+) and is not
* part of the ACPI specification.
*/
Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
Info.EvaluateInfo->Parameters = NULL;
Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info.EvaluateInfo);
if (ACPI_SUCCESS (Status))
{
Info.Num_INI++;
}
/* Walk namespace to execute all _INIs on present devices */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
/*
* Any _OSI requests should be completed by now. If the BIOS has
* requested any Windows OSI strings, we will always truncate
* I/O addresses to 16 bits -- for Windows compatibility.
*/
if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
{
AcpiGbl_TruncateIoAddresses = TRUE;
}
ACPI_FREE (Info.EvaluateInfo);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
" Executed %u _INI methods requiring %u _STA executions "
"(examined %u objects)\n",
Info.Num_INI, Info.Num_STA, Info.DeviceCount));
return_ACPI_STATUS (Status);
ErrorExit:
ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
AcpiNsInitOneDevice (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
UINT32 Flags;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *DeviceNode;
ACPI_FUNCTION_TRACE (NsInitOneDevice);
/* We are interested in Devices, Processors and ThermalZones only */
DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
(DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
(DeviceNode->Type != ACPI_TYPE_THERMAL))
{
return_ACPI_STATUS (AE_OK);
}
/*
* Because of an earlier namespace analysis, all subtrees that contain an
* _INI method are tagged.
*
* If this device subtree does not contain any _INI methods, we
* can exit now and stop traversing this entire subtree.
*/
if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
{
return_ACPI_STATUS (AE_CTRL_DEPTH);
}
/*
* Run _STA to determine if this device is present and functioning. We
* must know this information for two important reasons (from ACPI spec):
*
* 1) We can only run _INI if the device is present.
* 2) We must abort the device tree walk on this subtree if the device is
* not present and is not functional (we will not examine the children)
*
* The _STA method is not required to be present under the device, we
* assume the device is present if _STA does not exist.
*/
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
Status = AcpiUtExecute_STA (DeviceNode, &Flags);
if (ACPI_FAILURE (Status))
{
/* Ignore error and move on to next device */
return_ACPI_STATUS (AE_OK);
}
/*
* Flags == -1 means that _STA was not found. In this case, we assume that
* the device is both present and functional.
*
* From the ACPI spec, description of _STA:
*
* "If a device object (including the processor object) does not have an
* _STA object, then OSPM assumes that all of the above bits are set (in
* other words, the device is present, ..., and functioning)"
*/
if (Flags != ACPI_UINT32_MAX)
{
WalkInfo->Num_STA++;
}
/*
* Examine the PRESENT and FUNCTIONING status bits
*
* Note: ACPI spec does not seem to specify behavior for the present but
* not functioning case, so we assume functioning if present.
*/
if (!(Flags & ACPI_STA_DEVICE_PRESENT))
{
/* Device is not present, we must examine the Functioning bit */
if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
{
/*
* Device is not present but is "functioning". In this case,
* we will not run _INI, but we continue to examine the children
* of this device.
*
* From the ACPI spec, description of _STA: (Note - no mention
* of whether to run _INI or not on the device in question)
*
* "_STA may return bit 0 clear (not present) with bit 3 set
* (device is functional). This case is used to indicate a valid
* device for which no device driver should be loaded (for example,
* a bridge device.) Children of this device may be present and
* valid. OSPM should continue enumeration below a device whose
* _STA returns this bit combination"
*/
return_ACPI_STATUS (AE_OK);
}
else
{
/*
* Device is not present and is not functioning. We must abort the
* walk of this subtree immediately -- don't look at the children
* of such a device.
*
* From the ACPI spec, description of _INI:
*
* "If the _STA method indicates that the device is not present,
* OSPM will not run the _INI and will not examine the children
* of the device for _INI methods"
*/
return_ACPI_STATUS (AE_CTRL_DEPTH);
}
}
/*
* The device is present or is assumed present if no _STA exists.
* Run the _INI if it exists (not required to exist)
*
* Note: We know there is an _INI within this subtree, but it may not be
* under this particular device, it may be lower in the branch.
*/
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
Info->PrefixNode = DeviceNode;
Info->RelativePathname = METHOD_NAME__INI;
Info->Parameters = NULL;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info);
if (ACPI_SUCCESS (Status))
{
WalkInfo->Num_INI++;
}
#ifdef ACPI_DEBUG_OUTPUT
else if (Status != AE_NOT_FOUND)
{
/* Ignore error and move on to next device */
char *ScopeName = AcpiNsGetExternalPathname (Info->Node);
ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
ScopeName));
ACPI_FREE (ScopeName);
}
#endif
/* Ignore errors from above */
Status = AE_OK;
/*
* The _INI method has been run if present; call the Global Initialization
* Handler for this device.
*/
if (AcpiGbl_InitHandler)
{
Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEvaluateObject (
ACPI_HANDLE Handle,
ACPI_STRING Pathname,
ACPI_OBJECT_LIST *ExternalParams,
ACPI_BUFFER *ReturnBuffer)
{
ACPI_STATUS Status;
ACPI_EVALUATE_INFO *Info;
ACPI_SIZE BufferSpaceNeeded;
UINT32 i;
ACPI_FUNCTION_TRACE (AcpiEvaluateObject);
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Convert and validate the device handle */
Info->PrefixNode = AcpiNsValidateHandle (Handle);
if (!Info->PrefixNode)
{
Status = AE_BAD_PARAMETER;
goto Cleanup;
}
/*
* Get the actual namespace node for the target object.
* Handles these cases:
*
* 1) Null node, valid pathname from root (absolute path)
* 2) Node and valid pathname (path relative to Node)
* 3) Node, Null pathname
*/
if ((Pathname) &&
(ACPI_IS_ROOT_PREFIX (Pathname[0])))
{
/* The path is fully qualified, just evaluate by name */
Info->PrefixNode = NULL;
}
else if (!Handle)
{
/*
* A handle is optional iff a fully qualified pathname is specified.
* Since we've already handled fully qualified names above, this is
* an error.
*/
if (!Pathname)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Both Handle and Pathname are NULL"));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Null Handle with relative pathname [%s]", Pathname));
}
Status = AE_BAD_PARAMETER;
goto Cleanup;
}
Info->RelativePathname = Pathname;
/*
* Convert all external objects passed as arguments to the
* internal version(s).
*/
if (ExternalParams && ExternalParams->Count)
{
Info->ParamCount = (UINT16) ExternalParams->Count;
/* Warn on impossible argument count */
if (Info->ParamCount > ACPI_METHOD_NUM_ARGS)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
"Excess arguments (%u) - using only %u",
Info->ParamCount, ACPI_METHOD_NUM_ARGS));
Info->ParamCount = ACPI_METHOD_NUM_ARGS;
}
/*
* Allocate a new parameter block for the internal objects
* Add 1 to count to allow for null terminated internal list
*/
Info->Parameters = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) Info->ParamCount + 1) * sizeof (void *));
if (!Info->Parameters)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Convert each external object in the list to an internal object */
for (i = 0; i < Info->ParamCount; i++)
{
Status = AcpiUtCopyEobjectToIobject (
&ExternalParams->Pointer[i], &Info->Parameters[i]);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
}
Info->Parameters[Info->ParamCount] = NULL;
}
#if 0
/*
* Begin incoming argument count analysis. Check for too few args
* and too many args.
*/
switch (AcpiNsGetType (Info->Node))
{
case ACPI_TYPE_METHOD:
/* Check incoming argument count against the method definition */
if (Info->ObjDesc->Method.ParamCount > Info->ParamCount)
{
ACPI_ERROR ((AE_INFO,
"Insufficient arguments (%u) - %u are required",
Info->ParamCount,
Info->ObjDesc->Method.ParamCount));
Status = AE_MISSING_ARGUMENTS;
goto Cleanup;
}
else if (Info->ObjDesc->Method.ParamCount < Info->ParamCount)
{
ACPI_WARNING ((AE_INFO,
"Excess arguments (%u) - only %u are required",
Info->ParamCount,
Info->ObjDesc->Method.ParamCount));
/* Just pass the required number of arguments */
Info->ParamCount = Info->ObjDesc->Method.ParamCount;
}
/*
* Any incoming external objects to be passed as arguments to the
* method must be converted to internal objects
*/
if (Info->ParamCount)
{
/*
* Allocate a new parameter block for the internal objects
* Add 1 to count to allow for null terminated internal list
*/
Info->Parameters = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) Info->ParamCount + 1) * sizeof (void *));
if (!Info->Parameters)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Convert each external object in the list to an internal object */
for (i = 0; i < Info->ParamCount; i++)
{
Status = AcpiUtCopyEobjectToIobject (
&ExternalParams->Pointer[i], &Info->Parameters[i]);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
}
Info->Parameters[Info->ParamCount] = NULL;
}
break;
default:
/* Warn if arguments passed to an object that is not a method */
if (Info->ParamCount)
{
ACPI_WARNING ((AE_INFO,
"%u arguments were passed to a non-method ACPI object",
Info->ParamCount));
}
break;
}
#endif
/* Now we can evaluate the object */
Status = AcpiNsEvaluate (Info);
/*
* If we are expecting a return value, and all went well above,
* copy the return value to an external object.
*/
if (ReturnBuffer)
{
if (!Info->ReturnObject)
{
ReturnBuffer->Length = 0;
}
else
{
if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
ACPI_DESC_TYPE_NAMED)
{
/*
* If we received a NS Node as a return object, this means that
* the object we are evaluating has nothing interesting to
* return (such as a mutex, etc.) We return an error because
* these types are essentially unsupported by this interface.
* We don't check up front because this makes it easier to add
* support for various types at a later date if necessary.
*/
Status = AE_TYPE;
Info->ReturnObject = NULL; /* No need to delete a NS Node */
ReturnBuffer->Length = 0;
}
if (ACPI_SUCCESS (Status))
{
/* Dereference Index and RefOf references */
AcpiNsResolveReferences (Info);
/* Get the size of the returned object */
Status = AcpiUtGetObjectSize (Info->ReturnObject,
&BufferSpaceNeeded);
if (ACPI_SUCCESS (Status))
{
/* Validate/Allocate/Clear caller buffer */
Status = AcpiUtInitializeBuffer (ReturnBuffer,
BufferSpaceNeeded);
if (ACPI_FAILURE (Status))
{
/*
* Caller's buffer is too small or a new one can't
* be allocated
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Needed buffer size %X, %s\n",
(UINT32) BufferSpaceNeeded,
AcpiFormatException (Status)));
}
else
{
/* We have enough space for the object, build it */
Status = AcpiUtCopyIobjectToEobject (
Info->ReturnObject, ReturnBuffer);
}
}
}
}
}
if (Info->ReturnObject)
{
/*
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
AcpiExEnterInterpreter ();
/* Remove one reference on the return object (should delete it) */
AcpiUtRemoveReference (Info->ReturnObject);
AcpiExExitInterpreter ();
}
Cleanup:
/* Free the input parameter list (if we created one) */
if (Info->Parameters)
{
/* Free the allocated parameter block */
AcpiUtDeleteInternalObjectList (Info->Parameters);
}
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
static void ACPI_SYSTEM_XFACE
AcpiEvAsynchExecuteGpeMethod (
void *Context)
{
ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
ACPI_STATUS Status = AE_OK;
ACPI_EVALUATE_INFO *Info;
ACPI_GPE_NOTIFY_INFO *Notify;
ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod);
/* Do the correct dispatch - normal method or implicit notify */
switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags))
{
case ACPI_GPE_DISPATCH_NOTIFY:
/*
* Implicit notify.
* Dispatch a DEVICE_WAKE notify to the appropriate handler.
* NOTE: the request is queued for execution after this method
* completes. The notify handlers are NOT invoked synchronously
* from this thread -- because handlers may in turn run other
* control methods.
*
* June 2012: Expand implicit notify mechanism to support
* notifies on multiple device objects.
*/
Notify = GpeEventInfo->Dispatch.NotifyList;
while (ACPI_SUCCESS (Status) && Notify)
{
Status = AcpiEvQueueNotifyRequest (
Notify->DeviceNode, ACPI_NOTIFY_DEVICE_WAKE);
Notify = Notify->Next;
}
break;
case 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 = GpeEventInfo->Dispatch.MethodNode;
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 (GpeEventInfo->Dispatch.MethodNode)));
}
break;
default:
goto ErrorExit; /* Should never happen */
}
/* Defer enabling of GPE until all notify handlers are done */
Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
AcpiEvAsynchEnableGpe, GpeEventInfo);
if (ACPI_SUCCESS (Status))
{
return_VOID;
}
ErrorExit:
AcpiEvAsynchEnableGpe (GpeEventInfo);
return_VOID;
}
ACPI_STATUS
AcpiNsInitializeDevices (
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_DEVICE_WALK_INFO Info;
ACPI_HANDLE Handle;
ACPI_FUNCTION_TRACE (NsInitializeDevices);
if (!(Flags & ACPI_NO_DEVICE_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Initializing ACPI Devices\n"));
/* Init counters */
Info.DeviceCount = 0;
Info.Num_STA = 0;
Info.Num_INI = 0;
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Initializing Device/Processor/Thermal objects "
"and executing _INI/_STA methods:\n"));
/* Tree analysis: find all subtrees that contain _INI methods */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
/* Allocate the evaluation information block */
Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info.EvaluateInfo)
{
Status = AE_NO_MEMORY;
goto ErrorExit;
}
/*
* Execute the "global" _INI method that may appear at the root.
* This support is provided for Windows compatibility (Vista+) and
* is not part of the ACPI specification.
*/
Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
Info.EvaluateInfo->Parameters = NULL;
Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info.EvaluateInfo);
if (ACPI_SUCCESS (Status))
{
Info.Num_INI++;
}
/*
* Execute \_SB._INI.
* There appears to be a strict order requirement for \_SB._INI,
* which should be evaluated before any _REG evaluations.
*/
Status = AcpiGetHandle (NULL, "\\_SB", &Handle);
if (ACPI_SUCCESS (Status))
{
memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO));
Info.EvaluateInfo->PrefixNode = Handle;
Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
Info.EvaluateInfo->Parameters = NULL;
Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info.EvaluateInfo);
if (ACPI_SUCCESS (Status))
{
Info.Num_INI++;
}
}
}
/*
* Run all _REG methods
*
* Note: Any objects accessed by the _REG methods will be automatically
* initialized, even if they contain executable AML (see the call to
* AcpiNsInitializeObjects below).
*
* Note: According to the ACPI specification, we actually needn't execute
* _REG for SystemMemory/SystemIo operation regions, but for PCI_Config
* operation regions, it is required to evaluate _REG for those on a PCI
* root bus that doesn't contain _BBN object. So this code is kept here
* in order not to break things.
*/
if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Executing _REG OpRegion methods\n"));
Status = AcpiEvInitializeOpRegions ();
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
}
if (!(Flags & ACPI_NO_DEVICE_INIT))
{
/* Walk namespace to execute all _INIs on present devices */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
/*
* Any _OSI requests should be completed by now. If the BIOS has
* requested any Windows OSI strings, we will always truncate
* I/O addresses to 16 bits -- for Windows compatibility.
*/
if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
{
AcpiGbl_TruncateIoAddresses = TRUE;
}
ACPI_FREE (Info.EvaluateInfo);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
" Executed %u _INI methods requiring %u _STA executions "
"(examined %u objects)\n",
Info.Num_INI, Info.Num_STA, Info.DeviceCount));
}
return_ACPI_STATUS (Status);
ErrorExit:
ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEvExecuteRegMethod (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function)
{
ACPI_EVALUATE_INFO *Info;
ACPI_OPERAND_OBJECT *Args[3];
ACPI_OPERAND_OBJECT *RegionObj2;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvExecuteRegMethod);
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
if (RegionObj2->Extra.Method_REG == NULL)
{
return_ACPI_STATUS (AE_OK);
}
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->PrefixNode = RegionObj2->Extra.Method_REG;
Info->RelativePathname = NULL;
Info->Parameters = Args;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
/*
* The _REG method has two arguments:
*
* Arg0 - Integer:
* Operation region space ID Same value as RegionObj->Region.SpaceId
*
* Arg1 - Integer:
* connection status 1 for connecting the handler, 0 for disconnecting
* the handler (Passed as a parameter)
*/
Args[0] = AcpiUtCreateIntegerObject ((UINT64) RegionObj->Region.SpaceId);
if (!Args[0])
{
Status = AE_NO_MEMORY;
goto Cleanup1;
}
Args[1] = AcpiUtCreateIntegerObject ((UINT64) Function);
if (!Args[1])
{
Status = AE_NO_MEMORY;
goto Cleanup2;
}
Args[2] = NULL; /* Terminate list */
/* Execute the method, no return value */
ACPI_DEBUG_EXEC (
AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL));
Status = AcpiNsEvaluate (Info);
AcpiUtRemoveReference (Args[1]);
Cleanup2:
AcpiUtRemoveReference (Args[0]);
Cleanup1:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEvaluateObject (
ACPI_HANDLE Handle,
ACPI_STRING Pathname,
ACPI_OBJECT_LIST *ExternalParams,
ACPI_BUFFER *ReturnBuffer)
{
ACPI_STATUS Status;
ACPI_EVALUATE_INFO *Info;
ACPI_SIZE BufferSpaceNeeded;
UINT32 i;
ACPI_FUNCTION_TRACE (AcpiEvaluateObject);
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->Pathname = Pathname;
/* Convert and validate the device handle */
Info->PrefixNode = AcpiNsValidateHandle (Handle);
if (!Info->PrefixNode)
{
Status = AE_BAD_PARAMETER;
goto Cleanup;
}
/*
* If there are parameters to be passed to a control method, the external
* objects must all be converted to internal objects
*/
if (ExternalParams && ExternalParams->Count)
{
/*
* Allocate a new parameter block for the internal objects
* Add 1 to count to allow for null terminated internal list
*/
Info->Parameters = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) ExternalParams->Count + 1) * sizeof (void *));
if (!Info->Parameters)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Convert each external object in the list to an internal object */
for (i = 0; i < ExternalParams->Count; i++)
{
Status = AcpiUtCopyEobjectToIobject (
&ExternalParams->Pointer[i], &Info->Parameters[i]);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
}
Info->Parameters[ExternalParams->Count] = NULL;
}
/*
* Three major cases:
* 1) Fully qualified pathname
* 2) No handle, not fully qualified pathname (error)
* 3) Valid handle
*/
if ((Pathname) &&
(AcpiNsValidRootPrefix (Pathname[0])))
{
/* The path is fully qualified, just evaluate by name */
Info->PrefixNode = NULL;
Status = AcpiNsEvaluate (Info);
}
else if (!Handle)
{
/*
* A handle is optional iff a fully qualified pathname is specified.
* Since we've already handled fully qualified names above, this is
* an error
*/
if (!Pathname)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Both Handle and Pathname are NULL"));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Null Handle with relative pathname [%s]", Pathname));
}
Status = AE_BAD_PARAMETER;
}
else
{
/* We have a namespace a node and a possible relative path */
Status = AcpiNsEvaluate (Info);
}
/*
* If we are expecting a return value, and all went well above,
* copy the return value to an external object.
*/
if (ReturnBuffer)
{
if (!Info->ReturnObject)
{
ReturnBuffer->Length = 0;
}
else
{
if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
ACPI_DESC_TYPE_NAMED)
{
/*
* If we received a NS Node as a return object, this means that
* the object we are evaluating has nothing interesting to
* return (such as a mutex, etc.) We return an error because
* these types are essentially unsupported by this interface.
* We don't check up front because this makes it easier to add
* support for various types at a later date if necessary.
*/
Status = AE_TYPE;
Info->ReturnObject = NULL; /* No need to delete a NS Node */
ReturnBuffer->Length = 0;
}
if (ACPI_SUCCESS (Status))
{
/* Dereference Index and RefOf references */
AcpiNsResolveReferences (Info);
/* Get the size of the returned object */
Status = AcpiUtGetObjectSize (Info->ReturnObject,
&BufferSpaceNeeded);
if (ACPI_SUCCESS (Status))
{
/* Validate/Allocate/Clear caller buffer */
Status = AcpiUtInitializeBuffer (ReturnBuffer,
BufferSpaceNeeded);
if (ACPI_FAILURE (Status))
{
/*
* Caller's buffer is too small or a new one can't
* be allocated
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Needed buffer size %X, %s\n",
(UINT32) BufferSpaceNeeded,
AcpiFormatException (Status)));
}
else
{
/* We have enough space for the object, build it */
Status = AcpiUtCopyIobjectToEobject (Info->ReturnObject,
ReturnBuffer);
}
}
}
}
}
if (Info->ReturnObject)
{
/*
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
AcpiExEnterInterpreter ();
/* Remove one reference on the return object (should delete it) */
AcpiUtRemoveReference (Info->ReturnObject);
AcpiExExitInterpreter ();
}
Cleanup:
/* Free the input parameter list (if we created one) */
if (Info->Parameters)
{
/* Free the allocated parameter block */
AcpiUtDeleteInternalObjectList (Info->Parameters);
}
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
static void
AcpiNsExecModuleCode (
ACPI_OPERAND_OBJECT *MethodObj,
ACPI_EVALUATE_INFO *Info)
{
ACPI_OPERAND_OBJECT *ParentObj;
ACPI_NAMESPACE_NODE *ParentNode;
ACPI_OBJECT_TYPE Type;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (NsExecModuleCode);
/*
* Get the parent node. We cheat by using the NextObject field
* of the method object descriptor.
*/
ParentNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
MethodObj->Method.NextObject);
Type = AcpiNsGetType (ParentNode);
/*
* Get the region handler and save it in the method object. We may need
* this if an operation region declaration causes a _REG method to be run.
*
* We can't do this in AcpiPsLinkModuleCode because
* AcpiGbl_RootNode->Object is NULL at PASS1.
*/
if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object)
{
MethodObj->Method.Dispatch.Handler =
ParentNode->Object->Device.Handler;
}
/* Must clear NextObject (AcpiNsAttachObject needs the field) */
MethodObj->Method.NextObject = NULL;
/* Initialize the evaluation information block */
ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
Info->PrefixNode = ParentNode;
/*
* Get the currently attached parent object. Add a reference, because the
* ref count will be decreased when the method object is installed to
* the parent node.
*/
ParentObj = AcpiNsGetAttachedObject (ParentNode);
if (ParentObj)
{
AcpiUtAddReference (ParentObj);
}
/* Install the method (module-level code) in the parent node */
Status = AcpiNsAttachObject (ParentNode, MethodObj,
ACPI_TYPE_METHOD);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/* Execute the parent node as a control method */
Status = AcpiNsEvaluate (Info);
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Executed module-level code at %p\n",
MethodObj->Method.AmlStart));
/* Delete a possible implicit return value (in slack mode) */
if (Info->ReturnObject)
{
AcpiUtRemoveReference (Info->ReturnObject);
}
/* Detach the temporary method object */
AcpiNsDetachObject (ParentNode);
/* Restore the original parent object */
if (ParentObj)
{
Status = AcpiNsAttachObject (ParentNode, ParentObj, Type);
}
else
{
ParentNode->Type = (UINT8) Type;
}
Exit:
if (ParentObj)
{
AcpiUtRemoveReference (ParentObj);
}
return_VOID;
}
ACPI_STATUS
AcpiEvExecuteRegMethod (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function)
{
ACPI_EVALUATE_INFO *Info;
ACPI_OPERAND_OBJECT *Args[3];
ACPI_OPERAND_OBJECT *RegionObj2;
const ACPI_NAME *RegNamePtr = ACPI_CAST_PTR (ACPI_NAME, METHOD_NAME__REG);
ACPI_NAMESPACE_NODE *MethodNode;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvExecuteRegMethod);
if (!AcpiGbl_NamespaceInitialized ||
RegionObj->Region.Handler == NULL)
{
return_ACPI_STATUS (AE_OK);
}
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* Find any "_REG" method associated with this region definition.
* The method should always be updated as this function may be
* invoked after a namespace change.
*/
Node = RegionObj->Region.Node->Parent;
Status = AcpiNsSearchOneScope (
*RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode);
if (ACPI_SUCCESS (Status))
{
/*
* The _REG method is optional and there can be only one per
* region definition. This will be executed when the handler is
* attached or removed.
*/
RegionObj2->Extra.Method_REG = MethodNode;
}
if (RegionObj2->Extra.Method_REG == NULL)
{
return_ACPI_STATUS (AE_OK);
}
/* _REG(DISCONNECT) should be paired with _REG(CONNECT) */
if ((Function == ACPI_REG_CONNECT &&
RegionObj->Common.Flags & AOPOBJ_REG_CONNECTED) ||
(Function == ACPI_REG_DISCONNECT &&
!(RegionObj->Common.Flags & AOPOBJ_REG_CONNECTED)))
{
return_ACPI_STATUS (AE_OK);
}
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->PrefixNode = RegionObj2->Extra.Method_REG;
Info->RelativePathname = NULL;
Info->Parameters = Args;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
/*
* The _REG method has two arguments:
*
* Arg0 - Integer:
* Operation region space ID Same value as RegionObj->Region.SpaceId
*
* Arg1 - Integer:
* connection status 1 for connecting the handler, 0 for disconnecting
* the handler (Passed as a parameter)
*/
Args[0] = AcpiUtCreateIntegerObject ((UINT64) RegionObj->Region.SpaceId);
if (!Args[0])
{
Status = AE_NO_MEMORY;
goto Cleanup1;
}
Args[1] = AcpiUtCreateIntegerObject ((UINT64) Function);
if (!Args[1])
{
Status = AE_NO_MEMORY;
goto Cleanup2;
}
Args[2] = NULL; /* Terminate list */
/* Execute the method, no return value */
ACPI_DEBUG_EXEC (
AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL));
Status = AcpiNsEvaluate (Info);
AcpiUtRemoveReference (Args[1]);
if (ACPI_FAILURE (Status))
{
goto Cleanup2;
}
if (Function == ACPI_REG_CONNECT)
{
RegionObj->Common.Flags |= AOPOBJ_REG_CONNECTED;
}
else
{
RegionObj->Common.Flags &= ~AOPOBJ_REG_CONNECTED;
}
Cleanup2:
AcpiUtRemoveReference (Args[0]);
Cleanup1:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
static void ACPI_SYSTEM_XFACE
AcpiEvAsynchExecuteGpeMethod (
void *Context)
{
ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
ACPI_STATUS Status;
ACPI_GPE_EVENT_INFO *LocalGpeEventInfo;
ACPI_EVALUATE_INFO *Info;
ACPI_GPE_NOTIFY_INFO *Notify;
ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod);
/* Allocate a local GPE block */
LocalGpeEventInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_EVENT_INFO));
if (!LocalGpeEventInfo)
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"while handling a GPE"));
return_VOID;
}
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (LocalGpeEventInfo);
return_VOID;
}
/* Must revalidate the GpeNumber/GpeBlock */
if (!AcpiEvValidGpeEvent (GpeEventInfo))
{
Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
ACPI_FREE (LocalGpeEventInfo);
return_VOID;
}
/*
* 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))
{
ACPI_FREE (LocalGpeEventInfo);
return_VOID;
}
/* Do the correct dispatch - normal method or implicit notify */
switch (LocalGpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)
{
case ACPI_GPE_DISPATCH_NOTIFY:
/*
* Implicit notify.
* Dispatch a DEVICE_WAKE notify to the appropriate handler.
* NOTE: the request is queued for execution after this method
* completes. The notify handlers are NOT invoked synchronously
* from this thread -- because handlers may in turn run other
* control methods.
*
* June 2012: Expand implicit notify mechanism to support
* notifies on multiple device objects.
*/
Notify = LocalGpeEventInfo->Dispatch.NotifyList;
while (ACPI_SUCCESS (Status) && Notify)
{
Status = AcpiEvQueueNotifyRequest (Notify->DeviceNode,
ACPI_NOTIFY_DEVICE_WAKE);
Notify = Notify->Next;
}
break;
case 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->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)));
}
break;
default:
return_VOID; /* Should never happen */
}
/* Defer enabling of GPE until all notify handlers are done */
Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
AcpiEvAsynchEnableGpe, LocalGpeEventInfo);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (LocalGpeEventInfo);
}
return_VOID;
}
ACPI_STATUS
AcpiUtEvaluateObject (
ACPI_NAMESPACE_NODE *PrefixNode,
char *Path,
UINT32 ExpectedReturnBtypes,
ACPI_OPERAND_OBJECT **ReturnDesc)
{
ACPI_EVALUATE_INFO *Info;
ACPI_STATUS Status;
UINT32 ReturnBtype;
ACPI_FUNCTION_TRACE (UtEvaluateObject);
/* Allocate the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->PrefixNode = PrefixNode;
Info->Pathname = Path;
/* Evaluate the object/method */
Status = AcpiNsEvaluate (Info);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",
AcpiUtGetNodeName (PrefixNode), Path));
}
else
{
ACPI_ERROR_METHOD ("Method execution failed",
PrefixNode, Path, Status);
}
goto Cleanup;
}
/* Did we get a return object? */
if (!Info->ReturnObject)
{
if (ExpectedReturnBtypes)
{
ACPI_ERROR_METHOD ("No object was returned from",
PrefixNode, Path, AE_NOT_EXIST);
Status = AE_NOT_EXIST;
}
goto Cleanup;
}
/* Map the return object type to the bitmapped type */
switch ((Info->ReturnObject)->Common.Type)
{
case ACPI_TYPE_INTEGER:
ReturnBtype = ACPI_BTYPE_INTEGER;
break;
case ACPI_TYPE_BUFFER:
ReturnBtype = ACPI_BTYPE_BUFFER;
break;
case ACPI_TYPE_STRING:
ReturnBtype = ACPI_BTYPE_STRING;
break;
case ACPI_TYPE_PACKAGE:
ReturnBtype = ACPI_BTYPE_PACKAGE;
break;
default:
ReturnBtype = 0;
break;
}
if ((AcpiGbl_EnableInterpreterSlack) &&
(!ExpectedReturnBtypes))
{
/*
* We received a return object, but one was not expected. This can
* happen frequently if the "implicit return" feature is enabled.
* Just delete the return object and return AE_OK.
*/
AcpiUtRemoveReference (Info->ReturnObject);
goto Cleanup;
}
/* Is the return object one of the expected types? */
if (!(ExpectedReturnBtypes & ReturnBtype))
{
ACPI_ERROR_METHOD ("Return object type is incorrect",
PrefixNode, Path, AE_TYPE);
ACPI_ERROR ((AE_INFO,
"Type returned from %s was incorrect: %s, expected Btypes: %X",
Path, AcpiUtGetObjectTypeName (Info->ReturnObject),
ExpectedReturnBtypes));
/* On error exit, we must delete the return object */
AcpiUtRemoveReference (Info->ReturnObject);
Status = AE_TYPE;
goto Cleanup;
}
/* Object type is OK, return it */
*ReturnDesc = Info->ReturnObject;
Cleanup:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
