static ACPI_STATUS
LdCommonNamespaceEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
ACPI_OBJECT_TYPE ObjectType;
BOOLEAN ForceNewScope = FALSE;
ACPI_FUNCTION_NAME (LdCommonNamespaceEnd);
/* We are only interested in opcodes that have an associated name */
if (!Op->Asl.Namepath)
{
return (AE_OK);
}
/* Get the type to determine if we should pop the scope */
if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
(Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC))
{
/* TBD: Merge into AcpiDsMapNamedOpcodeToDataType */
ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
}
else
{
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
}
/* Pop scope that was pushed for Resource Templates */
if (Op->Asl.ParseOpcode == PARSEOP_NAME)
{
if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
{
ForceNewScope = TRUE;
}
}
/* Pop the scope stack */
if (ForceNewScope || AcpiNsOpensScope (ObjectType))
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"(%s): Popping scope for Op [%s] %p\n",
AcpiUtGetTypeName (ObjectType), Op->Asl.ParseOpName, Op));
(void) AcpiDsScopeStackPop (WalkState);
}
return (AE_OK);
}
static ACPI_STATUS
XfNamespaceLocateEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd);
/* We are only interested in opcodes that have an associated name */
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
if (!(OpInfo->Flags & AML_NAMED))
{
return_ACPI_STATUS (AE_OK);
}
/* Not interested in name references, we did not open a scope for them */
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL) ||
(Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
{
return_ACPI_STATUS (AE_OK);
}
/* Pop the scope stack if necessary */
if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode)))
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%s: Popping scope for Op %p\n",
AcpiUtGetTypeName (OpInfo->ObjectType), Op));
(void) AcpiDsScopeStackPop (WalkState);
}
return_ACPI_STATUS (AE_OK);
}
static ACPI_STATUS
AcpiDmResourceDescendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_OP_WALK_INFO *Info = Context;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_WALK_STATE *WalkState;
ACPI_OBJECT_TYPE ObjectType;
ACPI_STATUS Status;
WalkState = Info->WalkState;
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
/* Open new scope if necessary */
ObjectType = OpInfo->ObjectType;
if (AcpiNsOpensScope (ObjectType))
{
if (Op->Common.Node)
{
Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
}
/*
* Check if this operator contains a reference to a resource descriptor.
* If so, convert the reference into a symbolic reference.
*/
AcpiDmCheckResourceReference (Op, WalkState);
return (AE_OK);
}
static ACPI_STATUS
AcpiDmCommonAscendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_OP_WALK_INFO *Info = Context;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_OBJECT_TYPE ObjectType;
/* Close scope if necessary */
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
ObjectType = OpInfo->ObjectType;
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
if (AcpiNsOpensScope (ObjectType))
{
(void) AcpiDsScopeStackPop (Info->WalkState);
}
return (AE_OK);
}
static ACPI_STATUS
LdNamespace2Begin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_OBJECT_TYPE ObjectType;
BOOLEAN ForceNewScope = FALSE;
ACPI_PARSE_OBJECT *Arg;
char *Path;
ACPI_NAMESPACE_NODE *TargetNode;
ACPI_FUNCTION_NAME (LdNamespace2Begin);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
Op, Op->Asl.ParseOpName));
/* Ignore Ops with no namespace node */
Node = Op->Asl.Node;
if (!Node)
{
return (AE_OK);
}
/* Get the type to determine if we should push the scope */
if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
(Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC))
{
ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
}
else
{
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
}
/* Push scope for Resource Templates */
if (Op->Asl.ParseOpcode == PARSEOP_NAME)
{
if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
{
ForceNewScope = TRUE;
}
}
/* Push the scope stack */
if (ForceNewScope || AcpiNsOpensScope (ObjectType))
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
if (Op->Asl.ParseOpcode == PARSEOP_ALIAS)
{
/* Complete the alias node by getting and saving the target node */
/* First child is the alias target */
Arg = Op->Asl.Child;
/* Get the target pathname */
Path = Arg->Asl.Namepath;
if (!Path)
{
Status = UtInternalizeName (Arg->Asl.ExternalName, &Path);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
/* Get the NS node associated with the target. It must exist. */
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
WalkState, &TargetNode);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
Op->Asl.ExternalName);
/*
* The name was not found, go ahead and create it.
* This prevents more errors later.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
ACPI_TYPE_ANY,
ACPI_IMODE_LOAD_PASS1, ACPI_NS_NO_UPSEARCH,
WalkState, &(Node));
return (AE_OK);
}
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return (AE_OK);
}
/* Save the target node within the alias node */
Node->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
}
return (AE_OK);
}
static ACPI_STATUS
LdNamespace1Begin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE ObjectType;
ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY;
char *Path;
UINT32 Flags = ACPI_NS_NO_UPSEARCH;
ACPI_PARSE_OBJECT *Arg;
UINT32 i;
BOOLEAN ForceNewScope = FALSE;
ACPI_FUNCTION_NAME (LdNamespace1Begin);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
Op, Op->Asl.ParseOpName));
/*
* We are only interested in opcodes that have an associated name
* (or multiple names)
*/
switch (Op->Asl.AmlOpcode)
{
case AML_BANK_FIELD_OP:
case AML_INDEX_FIELD_OP:
case AML_FIELD_OP:
Status = LdLoadFieldElements (Op, WalkState);
return (Status);
default:
/* All other opcodes go below */
break;
}
/* Check if this object has already been installed in the namespace */
if (Op->Asl.Node)
{
return (AE_OK);
}
Path = Op->Asl.Namepath;
if (!Path)
{
return (AE_OK);
}
/* Map the raw opcode into an internal object type */
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_NAME:
Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */
Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */
/*
* If this name refers to a ResourceTemplate, we will need to open
* a new scope so that the resource subfield names can be entered into
* the namespace underneath this name
*/
if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
{
ForceNewScope = TRUE;
}
/* Get the data type associated with the named object, not the name itself */
/* Log2 loop to convert from Btype (binary) to Etype (encoded) */
ObjectType = 1;
for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2)
{
ObjectType++;
}
break;
case PARSEOP_EXTERNAL:
/*
* "External" simply enters a name and type into the namespace.
* We must be careful to not open a new scope, however, no matter
* what type the external name refers to (e.g., a method)
*
* first child is name, next child is ObjectType
*/
ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer;
ObjectType = ACPI_TYPE_ANY;
/*
* We will mark every new node along the path as "External". This
* allows some or all of the nodes to be created later in the ASL
* code. Handles cases like this:
*
* External (\_SB_.PCI0.ABCD, IntObj)
* Scope (_SB_)
* {
* Device (PCI0)
* {
* }
* }
* Method (X)
* {
* Store (\_SB_.PCI0.ABCD, Local0)
* }
*/
Flags |= ACPI_NS_EXTERNAL;
break;
case PARSEOP_DEFAULT_ARG:
if (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC)
{
Status = LdLoadResourceElements (Op, WalkState);
return_ACPI_STATUS (Status);
}
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
break;
case PARSEOP_SCOPE:
/*
* The name referenced by Scope(Name) must already exist at this point.
* In other words, forward references for Scope() are not supported.
* The only real reason for this is that the MS interpreter cannot
* handle this case. Perhaps someday this case can go away.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/* The name was not found, go ahead and create it */
Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
ACPI_TYPE_LOCAL_SCOPE,
ACPI_IMODE_LOAD_PASS1, Flags,
WalkState, &(Node));
/*
* However, this is an error -- primarily because the MS
* interpreter can't handle a forward reference from the
* Scope() operator.
*/
AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
Op->Asl.ExternalName);
AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op,
Op->Asl.ExternalName);
goto FinishNode;
}
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return_ACPI_STATUS (Status);
}
/* We found a node with this name, now check the type */
switch (Node->Type)
{
case ACPI_TYPE_LOCAL_SCOPE:
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* These are acceptable types - they all open a new scope */
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These types we will allow, but we will change the type.
* This enables some existing code of the form:
*
* Name (DEB, 0)
* Scope (DEB) { ... }
*
* Which is used to workaround the fact that the MS interpreter
* does not allow Scope() forward references.
*/
sprintf (MsgBuffer, "%s [%s], changing type to [Scope]",
Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
/* Switch the type to scope, open the new scope */
Node->Type = ACPI_TYPE_LOCAL_SCOPE;
Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
default:
/* All other types are an error */
sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
/*
* However, switch the type to be an actual scope so
* that compilation can continue without generating a whole
* cascade of additional errors. Open the new scope.
*/
Node->Type = ACPI_TYPE_LOCAL_SCOPE;
Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
}
Status = AE_OK;
goto FinishNode;
default:
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
break;
}
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n",
Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType)));
/* The name must not already exist */
Flags |= ACPI_NS_ERROR_IF_FOUND;
/*
* Enter the named type into the internal namespace. We enter the name
* as we go downward in the parse tree. Any necessary subobjects that
* involve arguments to the opcode must be created as we go back up the
* parse tree later.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
if (Status == AE_ALREADY_EXISTS)
{
/* The name already exists in this scope */
if (Node->Type == ACPI_TYPE_LOCAL_SCOPE)
{
/* Allow multiple references to the same scope */
Node->Type = (UINT8) ObjectType;
Status = AE_OK;
}
else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
{
/*
* Allow one create on an object or segment that was
* previously declared External
*/
Node->Flags &= ~ANOBJ_IS_EXTERNAL;
Node->Type = (UINT8) ObjectType;
/* Just retyped a node, probably will need to open a scope */
if (AcpiNsOpensScope (ObjectType))
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
Status = AE_OK;
}
else
{
/* Valid error, object already exists */
AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
Op->Asl.ExternalName);
return_ACPI_STATUS (AE_OK);
}
}
else
{
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return_ACPI_STATUS (Status);
}
}
if (ForceNewScope)
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
FinishNode:
/*
* Point the parse node to the new namespace node, and point
* the Node back to the original Parse node
*/
Op->Asl.Node = Node;
Node->Op = Op;
/* Set the actual data type if appropriate (EXTERNAL term only) */
if (ActualObjectType != ACPI_TYPE_ANY)
{
Node->Type = (UINT8) ActualObjectType;
Node->Value = ASL_EXTERNAL_METHOD;
}
if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
{
/*
* Get the method argument count from "Extra" and save
* it in the namespace node
*/
Node->Value = (UINT32) Op->Asl.Extra;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsLoad1BeginOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT **OutOp)
{
ACPI_PARSE_OBJECT *Op;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE ObjectType;
char *Path;
UINT32 Flags;
ACPI_FUNCTION_TRACE (DsLoad1BeginOp);
Op = WalkState->Op;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
/* We are only interested in opcodes that have an associated name */
if (Op)
{
if (!(WalkState->OpInfo->Flags & AML_NAMED))
{
*OutOp = Op;
return_ACPI_STATUS (AE_OK);
}
/* Check if this object has already been installed in the namespace */
if (Op->Common.Node)
{
*OutOp = Op;
return_ACPI_STATUS (AE_OK);
}
}
Path = AcpiPsGetNextNamestring (&WalkState->ParserState);
/* Map the raw opcode into an internal object type */
ObjectType = WalkState->OpInfo->ObjectType;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"State=%p Op=%p [%s]\n", WalkState, Op, AcpiUtGetTypeName (ObjectType)));
switch (WalkState->Opcode)
{
case AML_SCOPE_OP:
/*
* The target name of the Scope() operator must exist at this point so
* that we can actually open the scope to enter new names underneath it.
* Allow search-to-root for single namesegs.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &(Node));
#ifdef ACPI_ASL_COMPILER
if (Status == AE_NOT_FOUND)
{
/*
* Table disassembly:
* Target of Scope() not found. Generate an External for it, and
* insert the name into the namespace.
*/
AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_DEVICE, 0, 0);
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
WalkState, &Node);
}
#endif
if (ACPI_FAILURE (Status))
{
ACPI_ERROR_NAMESPACE (Path, Status);
return_ACPI_STATUS (Status);
}
/*
* Check to make sure that the target is
* one of the opcodes that actually opens a scope
*/
switch (Node->Type)
{
case ACPI_TYPE_ANY:
case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* These are acceptable types */
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These types we will allow, but we will change the type.
* This enables some existing code of the form:
*
* Name (DEB, 0)
* Scope (DEB) { ... }
*
* Note: silently change the type here. On the second pass,
* we will report a warning
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Type override - [%4.4s] had invalid type (%s) "
"for Scope operator, changed to type ANY\n",
AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));
Node->Type = ACPI_TYPE_ANY;
WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
break;
case ACPI_TYPE_METHOD:
/*
* Allow scope change to root during execution of module-level
* code. Root is typed METHOD during this time.
*/
if ((Node == AcpiGbl_RootNode) &&
(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
{
break;
}
/*lint -fallthrough */
default:
/* All other types are an error */
ACPI_ERROR ((AE_INFO,
"Invalid type (%s) for target of "
"Scope operator [%4.4s] (Cannot override)",
AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
break;
default:
/*
* For all other named opcodes, we will enter the name into
* the namespace.
*
* Setup the search flags.
* Since we are entering a name into the namespace, we do not want to
* enable the search-to-root upsearch.
*
* There are only two conditions where it is acceptable that the name
* already exists:
* 1) the Scope() operator can reopen a scoping object that was
* previously defined (Scope, Method, Device, etc.)
* 2) Whenever we are parsing a deferred opcode (OpRegion, Buffer,
* BufferField, or Package), the name of the object is already
* in the namespace.
*/
if (WalkState->DeferredNode)
{
/* This name is already in the namespace, get the node */
Node = WalkState->DeferredNode;
Status = AE_OK;
break;
}
/*
* If we are executing a method, do not create any namespace objects
* during the load phase, only during execution.
*/
if (WalkState->MethodNode)
{
Node = NULL;
Status = AE_OK;
break;
}
Flags = ACPI_NS_NO_UPSEARCH;
if ((WalkState->Opcode != AML_SCOPE_OP) &&
(!(WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)))
{
if (WalkState->NamespaceOverride)
{
Flags |= ACPI_NS_OVERRIDE_IF_FOUND;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Override allowed\n",
AcpiUtGetTypeName (ObjectType)));
}
else
{
Flags |= ACPI_NS_ERROR_IF_FOUND;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
AcpiUtGetTypeName (ObjectType)));
}
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"[%s] Both Find or Create allowed\n",
AcpiUtGetTypeName (ObjectType)));
}
/*
* Enter the named type into the internal namespace. We enter the name
* as we go downward in the parse tree. Any necessary subobjects that
* involve arguments to the opcode must be created as we go back up the
* parse tree later.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
if (Status == AE_ALREADY_EXISTS)
{
/* The name already exists in this scope */
if (Node->Flags & ANOBJ_IS_EXTERNAL)
{
/*
* Allow one create on an object or segment that was
* previously declared External
*/
Node->Flags &= ~ANOBJ_IS_EXTERNAL;
Node->Type = (UINT8) ObjectType;
/* Just retyped a node, probably will need to open a scope */
if (AcpiNsOpensScope (ObjectType))
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
Status = AE_OK;
}
}
if (ACPI_FAILURE (Status))
{
ACPI_ERROR_NAMESPACE (Path, Status);
return_ACPI_STATUS (Status);
}
}
break;
}
/* Common exit */
if (!Op)
{
/* Create a new op */
Op = AcpiPsAllocOp (WalkState->Opcode);
if (!Op)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
/* Initialize the op */
#if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
Op->Named.Path = ACPI_CAST_PTR (UINT8, Path);
#endif
if (Node)
{
/*
* Put the Node in the "op" object that the parser uses, so we
* can get it again quickly when this scope is closed
*/
Op->Common.Node = Node;
Op->Named.Name = Node->Name.Integer;
}
AcpiPsAppendArg (AcpiPsGetParentScope (&WalkState->ParserState), Op);
*OutOp = Op;
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiNsLookup (
ACPI_GENERIC_STATE *ScopeInfo,
char *Pathname,
ACPI_OBJECT_TYPE Type,
ACPI_INTERPRETER_MODE InterpreterMode,
UINT32 Flags,
ACPI_WALK_STATE *WalkState,
ACPI_NAMESPACE_NODE **ReturnNode)
{
ACPI_STATUS Status;
char *Path = Pathname;
ACPI_NAMESPACE_NODE *PrefixNode;
ACPI_NAMESPACE_NODE *CurrentNode = NULL;
ACPI_NAMESPACE_NODE *ThisNode = NULL;
UINT32 NumSegments;
UINT32 NumCarats;
ACPI_NAME SimpleName;
ACPI_OBJECT_TYPE TypeToCheckFor;
ACPI_OBJECT_TYPE ThisSearchType;
UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT;
UINT32 LocalFlags;
ACPI_FUNCTION_TRACE (NsLookup);
if (!ReturnNode)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
LocalFlags = Flags &
~(ACPI_NS_ERROR_IF_FOUND | ACPI_NS_OVERRIDE_IF_FOUND |
ACPI_NS_SEARCH_PARENT);
*ReturnNode = ACPI_ENTRY_NOT_FOUND;
AcpiGbl_NsLookupCount++;
if (!AcpiGbl_RootNode)
{
return_ACPI_STATUS (AE_NO_NAMESPACE);
}
/* Get the prefix scope. A null scope means use the root scope */
if ((!ScopeInfo) ||
(!ScopeInfo->Scope.Node))
{
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Null scope prefix, using root node (%p)\n",
AcpiGbl_RootNode));
PrefixNode = AcpiGbl_RootNode;
}
else
{
PrefixNode = ScopeInfo->Scope.Node;
if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
{
ACPI_ERROR ((AE_INFO, "%p is not a namespace node [%s]",
PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));
return_ACPI_STATUS (AE_AML_INTERNAL);
}
if (!(Flags & ACPI_NS_PREFIX_IS_SCOPE))
{
/*
* This node might not be a actual "scope" node (such as a
* Device/Method, etc.) It could be a Package or other object
* node. Backup up the tree to find the containing scope node.
*/
while (!AcpiNsOpensScope (PrefixNode->Type) &&
PrefixNode->Type != ACPI_TYPE_ANY)
{
PrefixNode = PrefixNode->Parent;
}
}
}
/* Save type. TBD: may be no longer necessary */
TypeToCheckFor = Type;
/*
* Begin examination of the actual pathname
*/
if (!Pathname)
{
/* A Null NamePath is allowed and refers to the root */
NumSegments = 0;
ThisNode = AcpiGbl_RootNode;
Path = "";
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Null Pathname (Zero segments), Flags=%X\n", Flags));
}
else
{
/*
* Name pointer is valid (and must be in internal name format)
*
* Check for scope prefixes:
*
* As represented in the AML stream, a namepath consists of an
* optional scope prefix followed by a name segment part.
*
* If present, the scope prefix is either a Root Prefix (in
* which case the name is fully qualified), or one or more
* Parent Prefixes (in which case the name's scope is relative
* to the current scope).
*/
if (*Path == (UINT8) AML_ROOT_PREFIX)
{
/* Pathname is fully qualified, start from the root */
ThisNode = AcpiGbl_RootNode;
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
/* Point to name segment part */
Path++;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Path is absolute from root [%p]\n", ThisNode));
}
else
{
/* Pathname is relative to current scope, start there */
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Searching relative to prefix scope [%4.4s] (%p)\n",
AcpiUtGetNodeName (PrefixNode), PrefixNode));
/*
* Handle multiple Parent Prefixes (carat) by just getting
* the parent node for each prefix instance.
*/
ThisNode = PrefixNode;
NumCarats = 0;
while (*Path == (UINT8) AML_PARENT_PREFIX)
{
/* Name is fully qualified, no search rules apply */
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
/*
* Point past this prefix to the name segment
* part or the next Parent Prefix
*/
Path++;
/* Backup to the parent node */
NumCarats++;
ThisNode = ThisNode->Parent;
if (!ThisNode)
{
/* Current scope has no parent scope */
ACPI_ERROR ((AE_INFO,
"%s: Path has too many parent prefixes (^) "
"- reached beyond root node", Pathname));
return_ACPI_STATUS (AE_NOT_FOUND);
}
}
if (SearchParentFlag == ACPI_NS_NO_UPSEARCH)
{
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Search scope is [%4.4s], path has %u carat(s)\n",
AcpiUtGetNodeName (ThisNode), NumCarats));
}
}
/*
* Determine the number of ACPI name segments in this pathname.
*
* The segment part consists of either:
* - A Null name segment (0)
* - A DualNamePrefix followed by two 4-byte name segments
* - A MultiNamePrefix followed by a byte indicating the
* number of segments and the segments themselves.
* - A single 4-byte name segment
*
* Examine the name prefix opcode, if any, to determine the number of
* segments.
*/
switch (*Path)
{
case 0:
/*
* Null name after a root or parent prefixes. We already
* have the correct target node and there are no name segments.
*/
NumSegments = 0;
Type = ThisNode->Type;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Prefix-only Pathname (Zero name segments), Flags=%X\n",
Flags));
break;
case AML_DUAL_NAME_PREFIX:
/* More than one NameSeg, search rules do not apply */
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
/* Two segments, point to first name segment */
NumSegments = 2;
Path++;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Dual Pathname (2 segments, Flags=%X)\n", Flags));
break;
case AML_MULTI_NAME_PREFIX_OP:
/* More than one NameSeg, search rules do not apply */
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
/* Extract segment count, point to first name segment */
Path++;
NumSegments = (UINT32) (UINT8) *Path;
Path++;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Multi Pathname (%u Segments, Flags=%X)\n",
NumSegments, Flags));
break;
default:
/*
* Not a Null name, no Dual or Multi prefix, hence there is
* only one name segment and Pathname is already pointing to it.
*/
NumSegments = 1;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Simple Pathname (1 segment, Flags=%X)\n", Flags));
break;
}
ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path));
}
/*
* Search namespace for each segment of the name. Loop through and
* verify (or add to the namespace) each name segment.
*
* The object type is significant only at the last name
* segment. (We don't care about the types along the path, only
* the type of the final target object.)
*/
ThisSearchType = ACPI_TYPE_ANY;
CurrentNode = ThisNode;
while (NumSegments && CurrentNode)
{
NumSegments--;
if (!NumSegments)
{
/* This is the last segment, enable typechecking */
ThisSearchType = Type;
/*
* Only allow automatic parent search (search rules) if the caller
* requested it AND we have a single, non-fully-qualified NameSeg
*/
if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&
(Flags & ACPI_NS_SEARCH_PARENT))
{
LocalFlags |= ACPI_NS_SEARCH_PARENT;
}
/* Set error flag according to caller */
if (Flags & ACPI_NS_ERROR_IF_FOUND)
{
LocalFlags |= ACPI_NS_ERROR_IF_FOUND;
}
/* Set override flag according to caller */
if (Flags & ACPI_NS_OVERRIDE_IF_FOUND)
{
LocalFlags |= ACPI_NS_OVERRIDE_IF_FOUND;
}
}
/* Extract one ACPI name from the front of the pathname */
ACPI_MOVE_32_TO_32 (&SimpleName, Path);
/* Try to find the single (4 character) ACPI name */
Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,
InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/* Name not found in ACPI namespace */
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Name [%4.4s] not found in scope [%4.4s] %p\n",
(char *) &SimpleName, (char *) &CurrentNode->Name,
CurrentNode));
}
*ReturnNode = ThisNode;
return_ACPI_STATUS (Status);
}
/* More segments to follow? */
if (NumSegments > 0)
{
/*
* If we have an alias to an object that opens a scope (such as a
* device or processor), we need to dereference the alias here so
* that we can access any children of the original node (via the
* remaining segments).
*/
if (ThisNode->Type == ACPI_TYPE_LOCAL_ALIAS)
{
if (!ThisNode->Object)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
if (AcpiNsOpensScope (((ACPI_NAMESPACE_NODE *)
ThisNode->Object)->Type))
{
ThisNode = (ACPI_NAMESPACE_NODE *) ThisNode->Object;
}
}
}
/* Special handling for the last segment (NumSegments == 0) */
else
{
/*
* Sanity typecheck of the target object:
*
* If 1) This is the last segment (NumSegments == 0)
* 2) And we are looking for a specific type
* (Not checking for TYPE_ANY)
* 3) Which is not an alias
* 4) Which is not a local type (TYPE_SCOPE)
* 5) And the type of target object is known (not TYPE_ANY)
* 6) And target object does not match what we are looking for
*
* Then we have a type mismatch. Just warn and ignore it.
*/
if ((TypeToCheckFor != ACPI_TYPE_ANY) &&
(TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) &&
(TypeToCheckFor != ACPI_TYPE_LOCAL_METHOD_ALIAS) &&
(TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) &&
(ThisNode->Type != ACPI_TYPE_ANY) &&
(ThisNode->Type != TypeToCheckFor))
{
/* Complain about a type mismatch */
ACPI_WARNING ((AE_INFO,
"NsLookup: Type mismatch on %4.4s (%s), searching for (%s)",
ACPI_CAST_PTR (char, &SimpleName),
AcpiUtGetTypeName (ThisNode->Type),
AcpiUtGetTypeName (TypeToCheckFor)));
}
/*
* If this is the last name segment and we are not looking for a
* specific type, but the type of found object is known, use that
* type to (later) see if it opens a scope.
*/
if (Type == ACPI_TYPE_ANY)
{
Type = ThisNode->Type;
}
}
/* Point to next name segment and make this node current */
Path += ACPI_NAME_SIZE;
CurrentNode = ThisNode;
}
ACPI_STATUS
AcpiDsExecBeginOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT **OutOp)
{
ACPI_PARSE_OBJECT *Op;
ACPI_STATUS Status = AE_OK;
UINT32 OpcodeClass;
ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
Op = WalkState->Op;
if (!Op)
{
Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
Op = *OutOp;
WalkState->Op = Op;
WalkState->Opcode = Op->Common.AmlOpcode;
WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"(%s) Popping scope for Op %p\n",
AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
Status = AcpiDsScopeStackPop (WalkState);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
}
}
if (Op == WalkState->Origin)
{
if (OutOp)
{
*OutOp = Op;
}
return_ACPI_STATUS (AE_OK);
}
/*
* If the previous opcode was a conditional, this opcode
* must be the beginning of the associated predicate.
* Save this knowledge in the current scope descriptor
*/
if ((WalkState->ControlState) &&
(WalkState->ControlState->Common.State ==
ACPI_CONTROL_CONDITIONAL_EXECUTING))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Exec predicate Op=%p State=%p\n",
Op, WalkState));
WalkState->ControlState->Common.State =
ACPI_CONTROL_PREDICATE_EXECUTING;
/* Save start of predicate */
WalkState->ControlState->Control.PredicateOp = Op;
}
OpcodeClass = WalkState->OpInfo->Class;
/* We want to send namepaths to the load code */
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
OpcodeClass = AML_CLASS_NAMED_OBJECT;
}
/*
* Handle the opcode based upon the opcode type
*/
switch (OpcodeClass)
{
case AML_CLASS_CONTROL:
Status = AcpiDsExecBeginControlOp (WalkState, Op);
break;
case AML_CLASS_NAMED_OBJECT:
if (WalkState->WalkType & ACPI_WALK_METHOD)
{
/*
* Found a named object declaration during method execution;
* we must enter this object into the namespace. The created
* object is temporary and will be deleted upon completion of
* the execution of this method.
*
* Note 10/2010: Except for the Scope() op. This opcode does
* not actually create a new object, it refers to an existing
* object. However, for Scope(), we want to indeed open a
* new scope.
*/
if (Op->Common.AmlOpcode != AML_SCOPE_OP)
{
Status = AcpiDsLoad2BeginOp (WalkState, NULL);
}
else
{
Status = AcpiDsScopeStackPush (
Op->Named.Node, Op->Named.Node->Type, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
}
break;
case AML_CLASS_EXECUTE:
case AML_CLASS_CREATE:
break;
default:
break;
}
/* Nothing to do here during method execution */
return_ACPI_STATUS (Status);
ErrorExit:
Status = AcpiDsMethodError (Status, WalkState);
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
AcpiDmXrefDescendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_OP_WALK_INFO *Info = Context;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_WALK_STATE *WalkState;
ACPI_OBJECT_TYPE ObjectType;
ACPI_OBJECT_TYPE ObjectType2;
ACPI_STATUS Status;
char *Path = NULL;
ACPI_PARSE_OBJECT *NextOp;
ACPI_NAMESPACE_NODE *Node;
ACPI_OPERAND_OBJECT *Object;
WalkState = Info->WalkState;
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
ObjectType = OpInfo->ObjectType;
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
if ((!(OpInfo->Flags & AML_NAMED)) &&
(!(OpInfo->Flags & AML_CREATE)) &&
(Op->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
{
goto Exit;
}
/* Get the NamePath from the appropriate place */
if (OpInfo->Flags & AML_NAMED)
{
if ((Op->Common.AmlOpcode == AML_ALIAS_OP) ||
(Op->Common.AmlOpcode == AML_SCOPE_OP))
{
/*
* Only these two operators refer to an existing name,
* first argument
*/
Path = (char *) Op->Named.Path;
}
}
else if (OpInfo->Flags & AML_CREATE)
{
/* Referenced Buffer Name is the first child */
NextOp = Op->Common.Value.Arg;
if (NextOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
Path = NextOp->Common.Value.String;
}
}
else
{
Path = Op->Common.Value.String;
}
if (!Path)
{
goto Exit;
}
/*
* Lookup the name in the namespace. Name must exist at this point, or it
* is an invalid reference.
*
* The namespace is also used as a lookup table for references to resource
* descriptors and the fields within them.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
WalkState, &Node);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
AcpiDmAddToExternalList (Path, (UINT8) ObjectType, 0);
/*
* We could install this into the namespace, but we catch duplicate
* externals when they are added to the list.
*/
#if 0
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
ACPI_IMODE_LOAD_PASS1, ACPI_NS_DONT_OPEN_SCOPE,
WalkState, &Node);
#endif
}
}
/*
* Found the node in external table, add it to external list
* Node->OwnerId == 0 indicates built-in ACPI Names, _OS_ etc
*/
else if (Node->OwnerId && WalkState->OwnerId != Node->OwnerId)
{
ObjectType2 = ObjectType;
Object = AcpiNsGetAttachedObject (Node);
if (Object)
{
ObjectType2 = Object->Common.Type;
}
if (ObjectType2 == ACPI_TYPE_METHOD)
{
AcpiDmAddToExternalList (Path, ACPI_TYPE_METHOD,
Object->Method.ParamCount);
}
else
{
AcpiDmAddToExternalList (Path, (UINT8) ObjectType2, 0);
}
Op->Common.Node = Node;
}
else
{
Op->Common.Node = Node;
}
Exit:
/* Open new scope if necessary */
if (AcpiNsOpensScope (ObjectType))
{
if (Op->Common.Node)
{
Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
}
return (AE_OK);
}
static ACPI_STATUS
AcpiDmLoadDescendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_OP_WALK_INFO *Info = Context;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_WALK_STATE *WalkState;
ACPI_OBJECT_TYPE ObjectType;
ACPI_STATUS Status;
char *Path = NULL;
ACPI_PARSE_OBJECT *NextOp;
ACPI_NAMESPACE_NODE *Node;
char FieldPath[5];
BOOLEAN PreDefined = FALSE;
UINT8 PreDefineIndex = 0;
WalkState = Info->WalkState;
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
ObjectType = OpInfo->ObjectType;
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
/* Only interested in operators that create new names */
if (!(OpInfo->Flags & AML_NAMED) &&
!(OpInfo->Flags & AML_CREATE))
{
goto Exit;
}
/* Get the NamePath from the appropriate place */
if (OpInfo->Flags & AML_NAMED)
{
/* For all named operators, get the new name */
Path = (char *) Op->Named.Path;
if (!Path && Op->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
{
*ACPI_CAST_PTR (UINT32, &FieldPath[0]) = Op->Named.Name;
FieldPath[4] = 0;
Path = FieldPath;
}
}
else if (OpInfo->Flags & AML_CREATE)
{
/* New name is the last child */
NextOp = Op->Common.Value.Arg;
while (NextOp->Common.Next)
{
NextOp = NextOp->Common.Next;
}
Path = NextOp->Common.Value.String;
}
if (!Path)
{
goto Exit;
}
/* Insert the name into the namespace */
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_LOAD_PASS2, ACPI_NS_DONT_OPEN_SCOPE,
WalkState, &Node);
Op->Common.Node = Node;
if (ACPI_SUCCESS (Status))
{
/* Check if it's a predefined node */
while (AcpiGbl_PreDefinedNames[PreDefineIndex].Name)
{
if (!ACPI_STRNCMP (Node->Name.Ascii,
AcpiGbl_PreDefinedNames[PreDefineIndex].Name, 4))
{
PreDefined = TRUE;
break;
}
PreDefineIndex++;
}
/*
* Set node owner id if it satisfies all the following conditions:
* 1) Not a predefined node, _SB_ etc
* 2) Not the root node
* 3) Not a node created by Scope
*/
if (!PreDefined && Node != AcpiGbl_RootNode &&
Op->Common.AmlOpcode != AML_SCOPE_OP)
{
Node->OwnerId = WalkState->OwnerId;
}
}
Exit:
if (AcpiNsOpensScope (ObjectType))
{
if (Op->Common.Node)
{
Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
}
return (AE_OK);
}
static ACPI_STATUS
LdNamespace1Begin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *MethodOp;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE ObjectType;
ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY;
char *Path;
UINT32 Flags = ACPI_NS_NO_UPSEARCH;
ACPI_PARSE_OBJECT *Arg;
UINT32 i;
BOOLEAN ForceNewScope = FALSE;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_PARSE_OBJECT *ParentOp;
ACPI_FUNCTION_NAME (LdNamespace1Begin);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
Op, Op->Asl.ParseOpName));
/*
* We are only interested in opcodes that have an associated name
* (or multiple names)
*/
switch (Op->Asl.AmlOpcode)
{
case AML_BANK_FIELD_OP:
case AML_INDEX_FIELD_OP:
case AML_FIELD_OP:
Status = LdLoadFieldElements (Op, WalkState);
return (Status);
case AML_INT_CONNECTION_OP:
if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP)
{
break;
}
Arg = Op->Asl.Child;
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
WalkState, &Node);
if (ACPI_FAILURE (Status))
{
break;
}
if (Node->Type == ACPI_TYPE_BUFFER)
{
Arg->Asl.Node = Node;
Arg = Node->Op->Asl.Child; /* Get namepath */
Arg = Arg->Asl.Next; /* Get actual buffer */
Arg = Arg->Asl.Child; /* Buffer length */
Arg = Arg->Asl.Next; /* RAW_DATA buffer */
}
break;
default:
/* All other opcodes go below */
break;
}
/* Check if this object has already been installed in the namespace */
if (Op->Asl.Node)
{
return (AE_OK);
}
/* Check for a possible illegal forward reference */
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING))
{
/*
* Op->Asl.Namepath will be NULL for these opcodes.
* These opcodes are guaranteed to have a parent.
* Examine the parent opcode.
*/
Status = AE_OK;
ParentOp = Op->Asl.Parent;
OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Asl.AmlOpcode);
/*
* Exclude all operators that actually declare a new name:
* Name (ABCD, 1) -> Ignore (AML_CLASS_NAMED_OBJECT)
* We only want references to named objects:
* Store (2, WXYZ) -> Attempt to resolve the name
*/
if (OpInfo->Class == AML_CLASS_NAMED_OBJECT)
{
return (AE_OK);
}
/*
* Check if the referenced object exists at this point during
* the load:
* 1) If it exists, then this cannot be a forward reference.
* 2) If it does not exist, it could be a forward reference or
* it truly does not exist (and no external declaration).
*/
Status = AcpiNsLookup (WalkState->ScopeInfo,
Op->Asl.Value.Name, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
WalkState, &Node);
if (Status == AE_NOT_FOUND)
{
/*
* This is either a foward reference or the object truly
* does not exist. The two cases can only be differentiated
* during the cross-reference stage later. Mark the Op/Name
* as not-found for now to indicate the need for further
* processing.
*
* Special case: Allow forward references from elements of
* Package objects. This provides compatibility with other
* ACPI implementations. To correctly implement this, the
* ACPICA table load defers package resolution until the entire
* namespace has been loaded.
*/
if ((ParentOp->Asl.ParseOpcode != PARSEOP_PACKAGE) &&
(ParentOp->Asl.ParseOpcode != PARSEOP_VAR_PACKAGE))
{
Op->Asl.CompileFlags |= OP_NOT_FOUND_DURING_LOAD;
}
return (AE_OK);
}
return (Status);
}
Path = Op->Asl.Namepath;
if (!Path)
{
return (AE_OK);
}
/* Map the raw opcode into an internal object type */
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_NAME:
Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */
Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */
/*
* If this name refers to a ResourceTemplate, we will need to open
* a new scope so that the resource subfield names can be entered into
* the namespace underneath this name
*/
if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC)
{
ForceNewScope = TRUE;
}
/* Get the data type associated with the named object, not the name itself */
/* Log2 loop to convert from Btype (binary) to Etype (encoded) */
ObjectType = 1;
for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2)
{
ObjectType++;
}
break;
case PARSEOP_EXTERNAL:
/*
* "External" simply enters a name and type into the namespace.
* We must be careful to not open a new scope, however, no matter
* what type the external name refers to (e.g., a method)
*
* first child is name, next child is ObjectType
*/
ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer;
ObjectType = ACPI_TYPE_ANY;
/*
* We will mark every new node along the path as "External". This
* allows some or all of the nodes to be created later in the ASL
* code. Handles cases like this:
*
* External (\_SB_.PCI0.ABCD, IntObj)
* Scope (_SB_)
* {
* Device (PCI0)
* {
* }
* }
* Method (X)
* {
* Store (\_SB_.PCI0.ABCD, Local0)
* }
*/
Flags |= ACPI_NS_EXTERNAL;
break;
case PARSEOP_DEFAULT_ARG:
if (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)
{
Status = LdLoadResourceElements (Op, WalkState);
return_ACPI_STATUS (Status);
}
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
break;
case PARSEOP_SCOPE:
/*
* The name referenced by Scope(Name) must already exist at this point.
* In other words, forward references for Scope() are not supported.
* The only real reason for this is that the MS interpreter cannot
* handle this case. Perhaps someday this case can go away.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/* The name was not found, go ahead and create it */
Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
ACPI_TYPE_LOCAL_SCOPE,
ACPI_IMODE_LOAD_PASS1, Flags,
WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* However, this is an error -- primarily because the MS
* interpreter can't handle a forward reference from the
* Scope() operator.
*/
AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
Op->Asl.ExternalName);
AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op,
Op->Asl.ExternalName);
goto FinishNode;
}
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return_ACPI_STATUS (Status);
}
else /* Status AE_OK */
{
/*
* Do not allow references to external scopes from the DSDT.
* This is because the DSDT is always loaded first, and the
* external reference cannot be resolved -- causing a runtime
* error because Scope() must be resolved immediately.
* 10/2015.
*/
if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(ACPI_COMPARE_NAME (Gbl_TableSignature, "DSDT")))
{
/* However, allowed if the reference is within a method */
MethodOp = Op->Asl.Parent;
while (MethodOp &&
(MethodOp->Asl.ParseOpcode != PARSEOP_METHOD))
{
MethodOp = MethodOp->Asl.Parent;
}
if (!MethodOp)
{
/* Not in a control method, error */
AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL);
}
}
}
/* We found a node with this name, now check the type */
switch (Node->Type)
{
case ACPI_TYPE_LOCAL_SCOPE:
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* These are acceptable types - they all open a new scope */
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These types we will allow, but we will change the type.
* This enables some existing code of the form:
*
* Name (DEB, 0)
* Scope (DEB) { ... }
*
* Which is used to workaround the fact that the MS interpreter
* does not allow Scope() forward references.
*/
sprintf (MsgBuffer, "%s [%s], changing type to [Scope]",
Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
/* Switch the type to scope, open the new scope */
Node->Type = ACPI_TYPE_LOCAL_SCOPE;
Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
default:
/* All other types are an error */
sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
/*
* However, switch the type to be an actual scope so
* that compilation can continue without generating a whole
* cascade of additional errors. Open the new scope.
*/
Node->Type = ACPI_TYPE_LOCAL_SCOPE;
Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
}
Status = AE_OK;
goto FinishNode;
default:
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
break;
}
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n",
Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType)));
/* The name must not already exist */
Flags |= ACPI_NS_ERROR_IF_FOUND;
/*
* Enter the named type into the internal namespace. We enter the name
* as we go downward in the parse tree. Any necessary subobjects that
* involve arguments to the opcode must be created as we go back up the
* parse tree later.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
if (Status == AE_ALREADY_EXISTS)
{
/* The name already exists in this scope */
if (Node->Type == ACPI_TYPE_LOCAL_SCOPE)
{
/* Allow multiple references to the same scope */
Node->Type = (UINT8) ObjectType;
Status = AE_OK;
}
else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
{
/*
* Allow one create on an object or segment that was
* previously declared External
*/
Node->Flags &= ~ANOBJ_IS_EXTERNAL;
Node->Type = (UINT8) ObjectType;
/* Just retyped a node, probably will need to open a scope */
if (AcpiNsOpensScope (ObjectType))
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
Status = AE_OK;
}
else if (!(Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
{
/*
* Allow externals in same scope as the definition of the
* actual object. Similar to C. Allows multiple definition
* blocks that refer to each other in the same file.
*/
Status = AE_OK;
}
else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) &&
(ObjectType == ACPI_TYPE_ANY))
{
/* Allow update of externals of unknown type. */
if (AcpiNsOpensScope (ActualObjectType))
{
Node->Type = (UINT8) ActualObjectType;
Status = AE_OK;
}
else
{
sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
return_ACPI_STATUS (AE_OK);
}
}
else
{
/* Valid error, object already exists */
AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
Node->Op->Asl.ExternalName);
return_ACPI_STATUS (AE_OK);
}
}
else
{
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return_ACPI_STATUS (Status);
}
}
if (ForceNewScope)
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
FinishNode:
/*
* Point the parse node to the new namespace node, and point
* the Node back to the original Parse node
*/
Op->Asl.Node = Node;
Node->Op = Op;
/* Set the actual data type if appropriate (EXTERNAL term only) */
if (ActualObjectType != ACPI_TYPE_ANY)
{
Node->Type = (UINT8) ActualObjectType;
Node->Value = ASL_EXTERNAL_METHOD;
}
if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
{
/*
* Get the method argument count from "Extra" and save
* it in the namespace node
*/
Node->Value = (UINT32) Op->Asl.Extra;
}
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
LdNamespace1Begin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *MethodOp;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE ObjectType;
ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY;
char *Path;
UINT32 Flags = ACPI_NS_NO_UPSEARCH;
ACPI_PARSE_OBJECT *Arg;
UINT32 i;
BOOLEAN ForceNewScope = FALSE;
ACPI_OWNER_ID OwnerId = 0;
ACPI_FUNCTION_NAME (LdNamespace1Begin);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
Op, Op->Asl.ParseOpName));
if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK)
{
/*
* Allocate an OwnerId for this block. This helps identify the owners
* of each namespace node. This is used in determining whether if
* certain external declarations cause redefinition errors.
*/
Status = AcpiUtAllocateOwnerId (&OwnerId);
WalkState->OwnerId = OwnerId;
if (ACPI_FAILURE (Status))
{
AslCoreSubsystemError (Op, Status,
"Failure to allocate owner ID to this definition block.", FALSE);
return_ACPI_STATUS (Status);
}
}
/*
* We are only interested in opcodes that have an associated name
* (or multiple names)
*/
switch (Op->Asl.AmlOpcode)
{
case AML_BANK_FIELD_OP:
case AML_INDEX_FIELD_OP:
case AML_FIELD_OP:
Status = LdLoadFieldElements (Op, WalkState);
return (Status);
case AML_INT_CONNECTION_OP:
if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP)
{
break;
}
Arg = Op->Asl.Child;
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
WalkState, &Node);
if (ACPI_FAILURE (Status))
{
break;
}
if (Node->Type == ACPI_TYPE_BUFFER)
{
Arg->Asl.Node = Node;
Arg = Node->Op->Asl.Child; /* Get namepath */
Arg = Arg->Asl.Next; /* Get actual buffer */
Arg = Arg->Asl.Child; /* Buffer length */
Arg = Arg->Asl.Next; /* RAW_DATA buffer */
}
break;
default:
/* All other opcodes go below */
break;
}
/* Check if this object has already been installed in the namespace */
if (Op->Asl.Node)
{
return (AE_OK);
}
Path = Op->Asl.Namepath;
if (!Path)
{
return (AE_OK);
}
/* Map the raw opcode into an internal object type */
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_NAME:
Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */
Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */
/*
* If this name refers to a ResourceTemplate, we will need to open
* a new scope so that the resource subfield names can be entered into
* the namespace underneath this name
*/
if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC)
{
ForceNewScope = TRUE;
}
/* Get the data type associated with the named object, not the name itself */
/* Log2 loop to convert from Btype (binary) to Etype (encoded) */
ObjectType = 1;
for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2)
{
ObjectType++;
}
break;
case PARSEOP_EXTERNAL:
/*
* "External" simply enters a name and type into the namespace.
* We must be careful to not open a new scope, however, no matter
* what type the external name refers to (e.g., a method)
*
* first child is name, next child is ObjectType
*/
ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer;
ObjectType = ACPI_TYPE_ANY;
/*
* We will mark every new node along the path as "External". This
* allows some or all of the nodes to be created later in the ASL
* code. Handles cases like this:
*
* External (\_SB_.PCI0.ABCD, IntObj)
* Scope (_SB_)
* {
* Device (PCI0)
* {
* }
* }
* Method (X)
* {
* Store (\_SB_.PCI0.ABCD, Local0)
* }
*/
Flags |= ACPI_NS_EXTERNAL;
break;
case PARSEOP_DEFAULT_ARG:
if (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)
{
Status = LdLoadResourceElements (Op, WalkState);
return_ACPI_STATUS (Status);
}
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
break;
case PARSEOP_SCOPE:
/*
* The name referenced by Scope(Name) must already exist at this point.
* In other words, forward references for Scope() are not supported.
* The only real reason for this is that the MS interpreter cannot
* handle this case. Perhaps someday this case can go away.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/* The name was not found, go ahead and create it */
Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
ACPI_TYPE_LOCAL_SCOPE,
ACPI_IMODE_LOAD_PASS1, Flags,
WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* However, this is an error -- primarily because the MS
* interpreter can't handle a forward reference from the
* Scope() operator.
*/
AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
Op->Asl.ExternalName);
AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op,
Op->Asl.ExternalName);
goto FinishNode;
}
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return_ACPI_STATUS (Status);
}
else /* Status AE_OK */
{
/*
* Do not allow references to external scopes from the DSDT.
* This is because the DSDT is always loaded first, and the
* external reference cannot be resolved -- causing a runtime
* error because Scope() must be resolved immediately.
* 10/2015.
*/
if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(ACPI_COMPARE_NAME (Gbl_TableSignature, "DSDT")))
{
/* However, allowed if the reference is within a method */
MethodOp = Op->Asl.Parent;
while (MethodOp &&
(MethodOp->Asl.ParseOpcode != PARSEOP_METHOD))
{
MethodOp = MethodOp->Asl.Parent;
}
if (!MethodOp)
{
/* Not in a control method, error */
AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL);
}
}
}
/* We found a node with this name, now check the type */
switch (Node->Type)
{
case ACPI_TYPE_LOCAL_SCOPE:
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* These are acceptable types - they all open a new scope */
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These types we will allow, but we will change the type.
* This enables some existing code of the form:
*
* Name (DEB, 0)
* Scope (DEB) { ... }
*
* Which is used to workaround the fact that the MS interpreter
* does not allow Scope() forward references.
*/
sprintf (MsgBuffer, "%s [%s], changing type to [Scope]",
Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
/* Switch the type to scope, open the new scope */
Node->Type = ACPI_TYPE_LOCAL_SCOPE;
Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
default:
/* All other types are an error */
sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
/*
* However, switch the type to be an actual scope so
* that compilation can continue without generating a whole
* cascade of additional errors. Open the new scope.
*/
Node->Type = ACPI_TYPE_LOCAL_SCOPE;
Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
}
Status = AE_OK;
goto FinishNode;
default:
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
break;
}
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n",
Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType)));
/* The name must not already exist */
Flags |= ACPI_NS_ERROR_IF_FOUND;
/*
* Enter the named type into the internal namespace. We enter the name
* as we go downward in the parse tree. Any necessary subobjects that
* involve arguments to the opcode must be created as we go back up the
* parse tree later.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
if (Status == AE_ALREADY_EXISTS)
{
/* The name already exists in this scope */
if (Node->Type == ACPI_TYPE_LOCAL_SCOPE)
{
/* Allow multiple references to the same scope */
Node->Type = (UINT8) ObjectType;
Status = AE_OK;
}
else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
{
/*
* Allow one create on an object or segment that was
* previously declared External only if WalkState->OwnerId and
* Node->OwnerId are different (meaning that the current WalkState
* and the Node are in different tables).
*/
Node->Flags &= ~ANOBJ_IS_EXTERNAL;
Node->Type = (UINT8) ObjectType;
/* Just retyped a node, probably will need to open a scope */
if (AcpiNsOpensScope (ObjectType))
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
Status = AE_OK;
if (Node->OwnerId == WalkState->OwnerId &&
!(Node->Flags & IMPLICIT_EXTERNAL))
{
AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
Node->Op->Asl.ExternalName);
}
if (Node->Flags & IMPLICIT_EXTERNAL)
{
Node->Flags &= ~IMPLICIT_EXTERNAL;
}
}
else if (!(Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
{
/*
* Allow externals in same scope as the definition of the
* actual object. Similar to C. Allows multiple definition
* blocks that refer to each other in the same file. However,
* do not allow name declaration and an external declaration
* within the same table. This is considered a re-declaration.
*/
Status = AE_OK;
if (Node->OwnerId == WalkState->OwnerId)
{
AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
Node->Op->Asl.ExternalName);
}
}
else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
(Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) &&
(ObjectType == ACPI_TYPE_ANY))
{
/*
* Allow update of externals of unknown type.
* In the case that multiple definition blocks are being
* parsed, updating the OwnerId allows enables subsequent calls
* of this method to understand which table the most recent
* external declaration was seen. Without this OwnerId update,
* code like the following is allowed to compile:
*
* DefinitionBlock("externtest.aml", "DSDT", 0x02, "Intel", "Many", 0x00000001)
* {
* External(ERRS,methodobj)
* Method (MAIN)
* {
* Name(NUM2, 0)
* ERRS(1,2,3)
* }
* }
*
* DefinitionBlock("externtest.aml", "SSDT", 0x02, "Intel", "Many", 0x00000001)
* {
* if (0)
* {
* External(ERRS,methodobj)
* }
* Method (ERRS,3)
* {}
*
* }
*/
Node->OwnerId = WalkState->OwnerId;
if (AcpiNsOpensScope (ActualObjectType))
{
Node->Type = (UINT8) ActualObjectType;
Status = AE_OK;
}
else
{
sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
return_ACPI_STATUS (AE_OK);
}
}
else
{
/* Valid error, object already exists */
AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
Node->Op->Asl.ExternalName);
return_ACPI_STATUS (AE_OK);
}
}
else
{
AslCoreSubsystemError (Op, Status,
"Failure from namespace lookup", FALSE);
return_ACPI_STATUS (Status);
}
}
if (ForceNewScope)
{
Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
FinishNode:
/*
* Point the parse node to the new namespace node, and point
* the Node back to the original Parse node
*/
Op->Asl.Node = Node;
Node->Op = Op;
/* Set the actual data type if appropriate (EXTERNAL term only) */
if (ActualObjectType != ACPI_TYPE_ANY)
{
Node->Type = (UINT8) ActualObjectType;
Node->Value = ASL_EXTERNAL_METHOD;
}
if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
{
/*
* Get the method argument count from "Extra" and save
* it in the namespace node
*/
Node->Value = (UINT32) Op->Asl.Extra;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiPsParseLoop (
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_PARSE_OBJECT *Op = NULL; /* current op */
ACPI_PARSE_STATE *ParserState;
UINT8 *AmlOpStart = NULL;
ACPI_FUNCTION_TRACE_PTR (PsParseLoop, WalkState);
if (WalkState->DescendingCallback == NULL)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
ParserState = &WalkState->ParserState;
WalkState->ArgTypes = 0;
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART)
{
/* We are restarting a preempted control method */
if (AcpiPsHasCompletedScope (ParserState))
{
/*
* We must check if a predicate to an IF or WHILE statement
* was just completed
*/
if ((ParserState->Scope->ParseScope.Op) &&
((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) ||
(ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) &&
(WalkState->ControlState) &&
(WalkState->ControlState->Common.State ==
ACPI_CONTROL_PREDICATE_EXECUTING))
{
/*
* A predicate was just completed, get the value of the
* predicate and branch based on that value
*/
WalkState->Op = NULL;
Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE));
if (ACPI_FAILURE (Status) &&
((Status & AE_CODE_MASK) != AE_CODE_CONTROL))
{
if (Status == AE_AML_NO_RETURN_VALUE)
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Invoked method did not return a value"));
}
ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed"));
return_ACPI_STATUS (Status);
}
Status = AcpiPsNextParseState (WalkState, Op, Status);
}
AcpiPsPopScope (ParserState, &Op,
&WalkState->ArgTypes, &WalkState->ArgCount);
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op));
}
else if (WalkState->PrevOp)
{
/* We were in the middle of an op */
Op = WalkState->PrevOp;
WalkState->ArgTypes = WalkState->PrevArgTypes;
}
}
#endif
/* Iterative parsing loop, while there is more AML to process: */
while ((ParserState->Aml < ParserState->AmlEnd) || (Op))
{
ASL_CV_CAPTURE_COMMENTS (WalkState);
AmlOpStart = ParserState->Aml;
if (!Op)
{
Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op);
if (ACPI_FAILURE (Status))
{
/*
* ACPI_PARSE_MODULE_LEVEL means that we are loading a table by
* executing it as a control method. However, if we encounter
* an error while loading the table, we need to keep trying to
* load the table rather than aborting the table load. Set the
* status to AE_OK to proceed with the table load.
*/
if ((WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL) &&
Status == AE_ALREADY_EXISTS)
{
Status = AE_OK;
}
if (Status == AE_CTRL_PARSE_CONTINUE)
{
continue;
}
if (Status == AE_CTRL_PARSE_PENDING)
{
Status = AE_OK;
}
if (Status == AE_CTRL_TERMINATE)
{
return_ACPI_STATUS (Status);
}
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (AcpiNsOpensScope (
AcpiPsGetOpcodeInfo (WalkState->Opcode)->ObjectType))
{
/*
* If the scope/device op fails to parse, skip the body of
* the scope op because the parse failure indicates that
* the device may not exist.
*/
ACPI_ERROR ((AE_INFO, "Skip parsing opcode %s",
AcpiPsGetOpcodeName (WalkState->Opcode)));
WalkState->ParserState.Aml = WalkState->Aml + 1;
WalkState->ParserState.Aml =
AcpiPsGetNextPackageEnd(&WalkState->ParserState);
WalkState->Aml = WalkState->ParserState.Aml;
}
continue;
}
AcpiExStartTraceOpcode (Op, WalkState);
}
/*
* Start ArgCount at zero because we don't know if there are
* any args yet
*/
WalkState->ArgCount = 0;
switch (Op->Common.AmlOpcode)
{
case AML_BYTE_OP:
case AML_WORD_OP:
case AML_DWORD_OP:
case AML_QWORD_OP:
break;
default:
ASL_CV_CAPTURE_COMMENTS (WalkState);
break;
}
/* Are there any arguments that must be processed? */
if (WalkState->ArgTypes)
{
/* Get arguments */
Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op);
if (ACPI_FAILURE (Status))
{
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if ((WalkState->ControlState) &&
((WalkState->ControlState->Control.Opcode == AML_IF_OP) ||
(WalkState->ControlState->Control.Opcode == AML_WHILE_OP)))
{
/*
* If the if/while op fails to parse, we will skip parsing
* the body of the op.
*/
ParserState->Aml =
WalkState->ControlState->Control.AmlPredicateStart + 1;
ParserState->Aml =
AcpiPsGetNextPackageEnd (ParserState);
WalkState->Aml = ParserState->Aml;
ACPI_ERROR ((AE_INFO, "Skipping While/If block"));
if (*WalkState->Aml == AML_ELSE_OP)
{
ACPI_ERROR ((AE_INFO, "Skipping Else block"));
WalkState->ParserState.Aml = WalkState->Aml + 1;
WalkState->ParserState.Aml =
AcpiPsGetNextPackageEnd (ParserState);
WalkState->Aml = ParserState->Aml;
}
ACPI_FREE(AcpiUtPopGenericState (&WalkState->ControlState));
}
Op = NULL;
continue;
}
}
/* Check for arguments that need to be processed */
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
"Parseloop: argument count: %8.8X\n", WalkState->ArgCount));
if (WalkState->ArgCount)
{
/*
* There are arguments (complex ones), push Op and
* prepare for argument
*/
Status = AcpiPsPushScope (ParserState, Op,
WalkState->ArgTypes, WalkState->ArgCount);
if (ACPI_FAILURE (Status))
{
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
continue;
}
Op = NULL;
continue;
}
/*
* All arguments have been processed -- Op is complete,
* prepare for next
*/
WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (WalkState->OpInfo->Flags & AML_NAMED)
{
if (Op->Common.AmlOpcode == AML_REGION_OP ||
Op->Common.AmlOpcode == AML_DATA_REGION_OP)
{
/*
* Skip parsing of control method or opregion body,
* because we don't have enough info in the first pass
* to parse them correctly.
*
* Completed parsing an OpRegion declaration, we now
* know the length.
*/
Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data);
}
}
if (WalkState->OpInfo->Flags & AML_CREATE)
{
/*
* Backup to beginning of CreateXXXfield declaration (1 for
* Opcode)
*
* BodyLength is unknown until we parse the body
*/
Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data);
}
if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
{
/*
* Backup to beginning of BankField declaration
*
* BodyLength is unknown until we parse the body
*/
Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data);
}
/* This op complete, notify the dispatcher */
if (WalkState->AscendingCallback != NULL)
{
WalkState->Op = Op;
WalkState->Opcode = Op->Common.AmlOpcode;
Status = WalkState->AscendingCallback (WalkState);
Status = AcpiPsNextParseState (WalkState, Op, Status);
if (Status == AE_CTRL_PENDING)
{
Status = AE_OK;
}
else if ((WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL) &&
(ACPI_AML_EXCEPTION(Status) || Status == AE_ALREADY_EXISTS ||
Status == AE_NOT_FOUND))
{
/*
* ACPI_PARSE_MODULE_LEVEL flag means that we are currently
* loading a table by executing it as a control method.
* However, if we encounter an error while loading the table,
* we need to keep trying to load the table rather than
* aborting the table load (setting the status to AE_OK
* continues the table load). If we get a failure at this
* point, it means that the dispatcher got an error while
* trying to execute the Op.
*/
Status = AE_OK;
}
}
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
} /* while ParserState->Aml */
Status = AcpiPsCompleteFinalOp (WalkState, Op, Status);
return_ACPI_STATUS (Status);
}
