ACPI_TABLE_DESC *
AcpiTbUninstallTable (
ACPI_TABLE_DESC *TableDesc)
{
ACPI_TABLE_DESC *NextDesc;
ACPI_FUNCTION_TRACE_PTR (TbUninstallTable, TableDesc);
if (!TableDesc)
{
return_PTR (NULL);
}
/* Unlink the descriptor from the doubly linked list */
if (TableDesc->Prev)
{
TableDesc->Prev->Next = TableDesc->Next;
}
else
{
/* Is first on list, update list head */
AcpiGbl_TableLists[TableDesc->Type].Next = TableDesc->Next;
}
if (TableDesc->Next)
{
TableDesc->Next->Prev = TableDesc->Prev;
}
/* Free the memory allocated for the table itself */
AcpiTbDeleteSingleTable (TableDesc);
/* Free the owner ID associated with this table */
AcpiUtReleaseOwnerId (&TableDesc->OwnerId);
/* Free the table descriptor */
NextDesc = TableDesc->Next;
ACPI_FREE (TableDesc);
/* Return pointer to the next descriptor */
return_PTR (NextDesc);
}
ACPI_STATUS
AcpiTbReleaseOwnerId (
UINT32 TableIndex)
{
ACPI_STATUS Status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE (TbReleaseOwnerId);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
{
AcpiUtReleaseOwnerId (
&(AcpiGbl_RootTableList.Tables[TableIndex].OwnerId));
Status = AE_OK;
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDbDisassembleMethod (
char *Name)
{
ACPI_STATUS Status;
ACPI_PARSE_OBJECT *Op;
ACPI_WALK_STATE *WalkState;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_NAMESPACE_NODE *Method;
Method = AcpiDbConvertToNode (Name);
if (!Method)
{
return (AE_BAD_PARAMETER);
}
if (Method->Type != ACPI_TYPE_METHOD)
{
ACPI_ERROR ((AE_INFO, "%s (%s): Object must be a control method",
Name, AcpiUtGetTypeName (Method->Type)));
return (AE_BAD_PARAMETER);
}
ObjDesc = Method->Object;
Op = AcpiPsCreateScopeOp ();
if (!Op)
{
return (AE_NO_MEMORY);
}
/* Create and initialize a new walk state */
WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
if (!WalkState)
{
return (AE_NO_MEMORY);
}
Status = AcpiDsInitAmlWalk (WalkState, Op, NULL,
ObjDesc->Method.AmlStart,
ObjDesc->Method.AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Status = AcpiUtAllocateOwnerId (&ObjDesc->Method.OwnerId);
WalkState->OwnerId = ObjDesc->Method.OwnerId;
/* Push start scope on scope stack and make it current */
Status = AcpiDsScopeStackPush (Method,
Method->Type, WalkState);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Parse the entire method AML including deferred operators */
WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
Status = AcpiPsParseAml (WalkState);
(void) AcpiDmParseDeferredOps (Op);
/* Now we can disassemble the method */
AcpiGbl_DbOpt_verbose = FALSE;
AcpiDmDisassemble (NULL, Op, 0);
AcpiGbl_DbOpt_verbose = TRUE;
AcpiPsDeleteParseTree (Op);
/* Method cleanup */
AcpiNsDeleteNamespaceSubtree (Method);
AcpiNsDeleteNamespaceByOwner (ObjDesc->Method.OwnerId);
AcpiUtReleaseOwnerId (&ObjDesc->Method.OwnerId);
return (AE_OK);
}
void
AcpiDsTerminateControlMethod (
ACPI_OPERAND_OBJECT *MethodDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_FUNCTION_TRACE_PTR (DsTerminateControlMethod, WalkState);
/* MethodDesc is required, WalkState is optional */
if (!MethodDesc)
{
return_VOID;
}
if (WalkState)
{
/* Delete all arguments and locals */
AcpiDsMethodDataDeleteAll (WalkState);
/*
* If method is serialized, release the mutex and restore the
* current sync level for this thread
*/
if (MethodDesc->Method.Mutex)
{
/* Acquisition Depth handles recursive calls */
MethodDesc->Method.Mutex->Mutex.AcquisitionDepth--;
if (!MethodDesc->Method.Mutex->Mutex.AcquisitionDepth)
{
WalkState->Thread->CurrentSyncLevel =
MethodDesc->Method.Mutex->Mutex.OriginalSyncLevel;
AcpiOsReleaseMutex (MethodDesc->Method.Mutex->Mutex.OsMutex);
MethodDesc->Method.Mutex->Mutex.ThreadId = 0;
}
}
/*
* Delete any namespace objects created anywhere within the
* namespace by the execution of this method. Unless:
* 1) This method is a module-level executable code method, in which
* case we want make the objects permanent.
* 2) There are other threads executing the method, in which case we
* will wait until the last thread has completed.
*/
if (!(MethodDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL) &&
(MethodDesc->Method.ThreadCount == 1))
{
/* Delete any direct children of (created by) this method */
AcpiNsDeleteNamespaceSubtree (WalkState->MethodNode);
/*
* Delete any objects that were created by this method
* elsewhere in the namespace (if any were created).
* Use of the ACPI_METHOD_MODIFIED_NAMESPACE optimizes the
* deletion such that we don't have to perform an entire
* namespace walk for every control method execution.
*/
if (MethodDesc->Method.InfoFlags & ACPI_METHOD_MODIFIED_NAMESPACE)
{
AcpiNsDeleteNamespaceByOwner (MethodDesc->Method.OwnerId);
MethodDesc->Method.InfoFlags &= ~ACPI_METHOD_MODIFIED_NAMESPACE;
}
}
}
/* Decrement the thread count on the method */
if (MethodDesc->Method.ThreadCount)
{
MethodDesc->Method.ThreadCount--;
}
else
{
ACPI_ERROR ((AE_INFO,
"Invalid zero thread count in method"));
}
/* Are there any other threads currently executing this method? */
if (MethodDesc->Method.ThreadCount)
{
/*
* Additional threads. Do not release the OwnerId in this case,
* we immediately reuse it for the next thread executing this method
*/
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"*** Completed execution of one thread, %u threads remaining\n",
MethodDesc->Method.ThreadCount));
}
else
{
/* This is the only executing thread for this method */
/*
* Support to dynamically change a method from NotSerialized to
* Serialized if it appears that the method is incorrectly written and
* does not support multiple thread execution. The best example of this
* is if such a method creates namespace objects and blocks. A second
* thread will fail with an AE_ALREADY_EXISTS exception.
*
* This code is here because we must wait until the last thread exits
* before marking the method as serialized.
*/
if (MethodDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED_PENDING)
{
if (WalkState)
{
ACPI_INFO ((AE_INFO,
"Marking method %4.4s as Serialized because of AE_ALREADY_EXISTS error",
WalkState->MethodNode->Name.Ascii));
}
/*
* Method tried to create an object twice and was marked as
* "pending serialized". The probable cause is that the method
* cannot handle reentrancy.
*
* The method was created as NotSerialized, but it tried to create
* a named object and then blocked, causing the second thread
* entrance to begin and then fail. Workaround this problem by
* marking the method permanently as Serialized when the last
* thread exits here.
*/
MethodDesc->Method.InfoFlags &= ~ACPI_METHOD_SERIALIZED_PENDING;
MethodDesc->Method.InfoFlags |= ACPI_METHOD_SERIALIZED;
MethodDesc->Method.SyncLevel = 0;
}
/* No more threads, we can free the OwnerId */
if (!(MethodDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL))
{
AcpiUtReleaseOwnerId (&MethodDesc->Method.OwnerId);
}
}
return_VOID;
}
ACPI_STATUS
AcpiTbInitTableDescriptor (
ACPI_TABLE_TYPE TableType,
ACPI_TABLE_DESC *TableInfo)
{
ACPI_TABLE_LIST *ListHead;
ACPI_TABLE_DESC *TableDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE_U32 (TbInitTableDescriptor, TableType);
/* Allocate a descriptor for this table */
TableDesc = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_TABLE_DESC));
if (!TableDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Get a new owner ID for the table */
Status = AcpiUtAllocateOwnerId (&TableDesc->OwnerId);
if (ACPI_FAILURE (Status))
{
goto ErrorExit1;
}
/* Install the table into the global data structure */
ListHead = &AcpiGbl_TableLists[TableType];
/*
* Two major types of tables: 1) Only one instance is allowed. This
* includes most ACPI tables such as the DSDT. 2) Multiple instances of
* the table are allowed. This includes SSDT and PSDTs.
*/
if (ACPI_IS_SINGLE_TABLE (AcpiGbl_TableData[TableType].Flags))
{
/*
* Only one table allowed, and a table has alread been installed
* at this location, so return an error.
*/
if (ListHead->Next)
{
Status = AE_ALREADY_EXISTS;
goto ErrorExit2;
}
TableDesc->Next = ListHead->Next;
ListHead->Next = TableDesc;
if (TableDesc->Next)
{
TableDesc->Next->Prev = TableDesc;
}
ListHead->Count++;
}
else
{
/*
* Link the new table in to the list of tables of this type.
* Insert at the end of the list, order IS IMPORTANT.
*
* TableDesc->Prev & Next are already NULL from calloc()
*/
ListHead->Count++;
if (!ListHead->Next)
{
ListHead->Next = TableDesc;
}
else
{
TableDesc->Next = ListHead->Next;
while (TableDesc->Next->Next)
{
TableDesc->Next = TableDesc->Next->Next;
}
TableDesc->Next->Next = TableDesc;
TableDesc->Prev = TableDesc->Next;
TableDesc->Next = NULL;
}
}
/* Finish initialization of the table descriptor */
TableDesc->LoadedIntoNamespace = FALSE;
TableDesc->Type = (UINT8) TableType;
TableDesc->Pointer = TableInfo->Pointer;
TableDesc->Length = TableInfo->Length;
TableDesc->Allocation = TableInfo->Allocation;
TableDesc->AmlStart = (UINT8 *) (TableDesc->Pointer + 1),
TableDesc->AmlLength = (UINT32)
(TableDesc->Length - (UINT32) sizeof (ACPI_TABLE_HEADER));
/*
* Set the appropriate global pointer (if there is one) to point to the
* newly installed table
*/
if (AcpiGbl_TableData[TableType].GlobalPtr)
{
*(AcpiGbl_TableData[TableType].GlobalPtr) = TableInfo->Pointer;
}
/* Return Data */
TableInfo->OwnerId = TableDesc->OwnerId;
TableInfo->InstalledDesc = TableDesc;
return_ACPI_STATUS (AE_OK);
/* Error exit with cleanup */
ErrorExit2:
AcpiUtReleaseOwnerId (&TableDesc->OwnerId);
ErrorExit1:
ACPI_FREE (TableDesc);
return_ACPI_STATUS (Status);
}
