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
LdLoadResourceElements (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState)
{
ACPI_PARSE_OBJECT *InitializerOp = NULL;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
/*
* Enter the resource name into the namespace. Name must not already exist.
* This opens a scope, so later field names are guaranteed to be new/unique.
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Asl.Namepath,
ACPI_TYPE_LOCAL_RESOURCE, ACPI_IMODE_LOAD_PASS1,
ACPI_NS_NO_UPSEARCH | ACPI_NS_ERROR_IF_FOUND,
WalkState, &Node);
if (ACPI_FAILURE (Status))
{
if (Status == AE_ALREADY_EXISTS)
{
/* Actual node causing the error was saved in ParentMethod */
AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS,
(ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod,
Op->Asl.Namepath, ASL_MSG_FOUND_HERE, Node->Op,
Node->Op->Asl.ExternalName);
return (AE_OK);
}
return (Status);
}
Node->Value = (UINT32) Op->Asl.Value.Integer;
Node->Op = Op;
Op->Asl.Node = Node;
/*
* Now enter the predefined fields, for easy lookup when referenced
* by the source ASL
*/
InitializerOp = ASL_GET_CHILD_NODE (Op);
while (InitializerOp)
{
if (InitializerOp->Asl.ExternalName)
{
Status = AcpiNsLookup (WalkState->ScopeInfo,
InitializerOp->Asl.ExternalName,
ACPI_TYPE_LOCAL_RESOURCE_FIELD,
ACPI_IMODE_LOAD_PASS1,
ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE,
NULL, &Node);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Store the field offset and length in the namespace node
* so it can be used when the field is referenced
*/
Node->Value = InitializerOp->Asl.Value.Tag.BitOffset;
Node->Length = InitializerOp->Asl.Value.Tag.BitLength;
InitializerOp->Asl.Node = Node;
Node->Op = InitializerOp;
}
InitializerOp = ASL_GET_PEER_NODE (InitializerOp);
}
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;
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);
}
static ACPI_STATUS
LdLoadFieldElements (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState)
{
ACPI_PARSE_OBJECT *Child = NULL;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
/* Get the first named field element */
switch (Op->Asl.AmlOpcode)
{
case AML_BANK_FIELD_OP:
Child = UtGetArg (Op, 6);
break;
case AML_INDEX_FIELD_OP:
Child = UtGetArg (Op, 5);
break;
case AML_FIELD_OP:
Child = UtGetArg (Op, 4);
break;
default:
/* No other opcodes should arrive here */
return (AE_BAD_PARAMETER);
}
/* Enter all elements into the namespace */
while (Child)
{
switch (Child->Asl.AmlOpcode)
{
case AML_INT_RESERVEDFIELD_OP:
case AML_INT_ACCESSFIELD_OP:
case AML_INT_CONNECTION_OP:
break;
default:
Status = AcpiNsLookup (WalkState->ScopeInfo,
Child->Asl.Value.String,
ACPI_TYPE_LOCAL_REGION_FIELD,
ACPI_IMODE_LOAD_PASS1,
ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
ACPI_NS_ERROR_IF_FOUND, NULL, &Node);
if (ACPI_FAILURE (Status))
{
if (Status != AE_ALREADY_EXISTS)
{
AslError (ASL_ERROR, ASL_MSG_CORE_EXCEPTION, Child,
Child->Asl.Value.String);
return (Status);
}
else if (Status == AE_ALREADY_EXISTS &&
(Node->Flags & ANOBJ_IS_EXTERNAL))
{
Node->Type = (UINT8) ACPI_TYPE_LOCAL_REGION_FIELD;
}
else
{
/*
* The name already exists in this scope
* But continue processing the elements
*/
AslDualParseOpError (ASL_WARNING, ASL_MSG_EXTERN_COLLISION, Child,
Child->Asl.Value.String, ASL_MSG_EXTERN_FOUND_HERE, Node->Op,
Node->Op->Asl.ExternalName);
}
}
else
{
Child->Asl.Node = Node;
Node->Op = Child;
}
break;
}
Child = Child->Asl.Next;
}
return (AE_OK);
}
ACPI_STATUS
MtMethodAnalysisWalkBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;
ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack;
ACPI_PARSE_OBJECT *Next;
UINT32 RegisterNumber;
UINT32 i;
char LocalName[] = "Local0";
char ArgName[] = "Arg0";
ACPI_PARSE_OBJECT *ArgNode;
ACPI_PARSE_OBJECT *NextType;
ACPI_PARSE_OBJECT *NextParamType;
UINT8 ActualArgs = 0;
/* Build cross-reference output file if requested */
if (AslGbl_CrossReferenceOutput)
{
OtXrefWalkPart1 (Op, Level, MethodInfo);
}
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_METHOD:
AslGbl_TotalMethods++;
/* Create and init method info */
MethodInfo = UtLocalCalloc (sizeof (ASL_METHOD_INFO));
MethodInfo->Next = WalkInfo->MethodStack;
MethodInfo->Op = Op;
WalkInfo->MethodStack = MethodInfo;
/*
* Special handling for _PSx methods. Dependency rules (same scope):
*
* 1) _PS0 - One of these must exist: _PS1, _PS2, _PS3
* 2) _PS1/_PS2/_PS3: A _PS0 must exist
*/
if (ACPI_COMPARE_NAMESEG (METHOD_NAME__PS0, Op->Asl.NameSeg))
{
/* For _PS0, one of _PS1/_PS2/_PS3 must exist */
if ((!ApFindNameInScope (METHOD_NAME__PS1, Op)) &&
(!ApFindNameInScope (METHOD_NAME__PS2, Op)) &&
(!ApFindNameInScope (METHOD_NAME__PS3, Op)))
{
AslError (ASL_WARNING, ASL_MSG_MISSING_DEPENDENCY, Op,
"_PS0 requires one of _PS1/_PS2/_PS3 in same scope");
}
}
else if (
ACPI_COMPARE_NAMESEG (METHOD_NAME__PS1, Op->Asl.NameSeg) ||
ACPI_COMPARE_NAMESEG (METHOD_NAME__PS2, Op->Asl.NameSeg) ||
ACPI_COMPARE_NAMESEG (METHOD_NAME__PS3, Op->Asl.NameSeg))
{
/* For _PS1/_PS2/_PS3, a _PS0 must exist */
if (!ApFindNameInScope (METHOD_NAME__PS0, Op))
{
sprintf (AslGbl_MsgBuffer,
"%4.4s requires _PS0 in same scope", Op->Asl.NameSeg);
AslError (ASL_WARNING, ASL_MSG_MISSING_DEPENDENCY, Op,
AslGbl_MsgBuffer);
}
}
/* Get the name node */
Next = Op->Asl.Child;
/* Get the NumArguments node */
Next = Next->Asl.Next;
MethodInfo->NumArguments = (UINT8)
(((UINT8) Next->Asl.Value.Integer) & 0x07);
/* Get the SerializeRule and SyncLevel nodes, ignored here */
Next = Next->Asl.Next;
MethodInfo->ShouldBeSerialized = (UINT8) Next->Asl.Value.Integer;
Next = Next->Asl.Next;
ArgNode = Next;
/* Get the ReturnType node */
Next = Next->Asl.Next;
NextType = Next->Asl.Child;
while (NextType)
{
/* Get and map each of the ReturnTypes */
MethodInfo->ValidReturnTypes |= AnMapObjTypeToBtype (NextType);
NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
NextType = NextType->Asl.Next;
}
/* Get the ParameterType node */
Next = Next->Asl.Next;
NextType = Next->Asl.Child;
while (NextType)
{
if (NextType->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)
{
NextParamType = NextType->Asl.Child;
while (NextParamType)
{
MethodInfo->ValidArgTypes[ActualArgs] |=
AnMapObjTypeToBtype (NextParamType);
NextParamType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
NextParamType = NextParamType->Asl.Next;
}
}
else
{
MethodInfo->ValidArgTypes[ActualArgs] =
AnMapObjTypeToBtype (NextType);
NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
ActualArgs++;
}
NextType = NextType->Asl.Next;
}
if ((MethodInfo->NumArguments) &&
(MethodInfo->NumArguments != ActualArgs))
{
/* error: Param list did not match number of args */
}
/* Allow numarguments == 0 for Function() */
if ((!MethodInfo->NumArguments) && (ActualArgs))
{
MethodInfo->NumArguments = ActualArgs;
ArgNode->Asl.Value.Integer |= ActualArgs;
}
/*
* Actual arguments are initialized at method entry.
* All other ArgX "registers" can be used as locals, so we
* track their initialization.
*/
for (i = 0; i < MethodInfo->NumArguments; i++)
{
MethodInfo->ArgInitialized[i] = TRUE;
}
break;
case PARSEOP_METHODCALL:
/* Check for a recursive method call */
if (MethodInfo &&
(Op->Asl.Node == MethodInfo->Op->Asl.Node))
{
if (MethodInfo->CreatesNamedObjects)
{
/*
* This is an error, as it will fail at runtime on all ACPI
* implementations. Any named object declarations will be
* executed twice, causing failure the second time. Note,
* this is independent of whether the method is declared
* Serialized, because the same thread is attempting to
* reenter the method, and this will always succeed.
*/
AslDualParseOpError (ASL_ERROR, ASL_MSG_ILLEGAL_RECURSION, Op,
Op->Asl.Value.String, ASL_MSG_FOUND_HERE, MethodInfo->Op,
MethodInfo->Op->Asl.ExternalName);
}
else
{
/* Method does not create objects, issue a remark */
AslError (ASL_REMARK, ASL_MSG_RECURSION, Op, Op->Asl.ExternalName);
}
}
break;
case PARSEOP_LOCAL0:
case PARSEOP_LOCAL1:
case PARSEOP_LOCAL2:
case PARSEOP_LOCAL3:
case PARSEOP_LOCAL4:
case PARSEOP_LOCAL5:
case PARSEOP_LOCAL6:
case PARSEOP_LOCAL7:
if (!MethodInfo)
{
/*
* Local was used outside a control method, or there was an error
* in the method declaration.
*/
AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD,
Op, Op->Asl.ExternalName);
return (AE_ERROR);
}
RegisterNumber = (Op->Asl.AmlOpcode & 0x0007);
/*
* If the local is being used as a target, mark the local
* initialized
*/
if (Op->Asl.CompileFlags & OP_IS_TARGET)
{
MethodInfo->LocalInitialized[RegisterNumber] = TRUE;
}
/*
* Otherwise, this is a reference, check if the local
* has been previously initialized.
*
* The only operator that accepts an uninitialized value is ObjectType()
*/
else if ((!MethodInfo->LocalInitialized[RegisterNumber]) &&
(Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))
{
LocalName[strlen (LocalName) -1] = (char) (RegisterNumber + 0x30);
AslError (ASL_ERROR, ASL_MSG_LOCAL_INIT, Op, LocalName);
}
break;
case PARSEOP_ARG0:
case PARSEOP_ARG1:
case PARSEOP_ARG2:
case PARSEOP_ARG3:
case PARSEOP_ARG4:
case PARSEOP_ARG5:
case PARSEOP_ARG6:
if (!MethodInfo)
{
/*
* Arg was used outside a control method, or there was an error
* in the method declaration.
*/
AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD,
Op, Op->Asl.ExternalName);
return (AE_ERROR);
}
RegisterNumber = (Op->Asl.AmlOpcode & 0x000F) - 8;
ArgName[strlen (ArgName) -1] = (char) (RegisterNumber + 0x30);
/*
* If the Arg is being used as a target, mark the local
* initialized
*/
if (Op->Asl.CompileFlags & OP_IS_TARGET)
{
MethodInfo->ArgInitialized[RegisterNumber] = TRUE;
}
/*
* Otherwise, this is a reference, check if the Arg
* has been previously initialized.
*
* The only operator that accepts an uninitialized value is ObjectType()
*/
else if ((!MethodInfo->ArgInitialized[RegisterNumber]) &&
(Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))
{
AslError (ASL_ERROR, ASL_MSG_ARG_INIT, Op, ArgName);
}
/* Flag this arg if it is not a "real" argument to the method */
if (RegisterNumber >= MethodInfo->NumArguments)
{
AslError (ASL_REMARK, ASL_MSG_NOT_PARAMETER, Op, ArgName);
}
break;
case PARSEOP_RETURN:
if (!MethodInfo)
{
/*
* Probably was an error in the method declaration,
* no additional error here
*/
ACPI_WARNING ((AE_INFO, "%p, No parent method", Op));
return (AE_ERROR);
}
/*
* A child indicates a possible return value. A simple Return or
* Return() is marked with OP_IS_NULL_RETURN by the parser so
* that it is not counted as a "real" return-with-value, although
* the AML code that is actually emitted is Return(0). The AML
* definition of Return has a required parameter, so we are
* forced to convert a null return to Return(0).
*/
if ((Op->Asl.Child) &&
(Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG) &&
(!(Op->Asl.Child->Asl.CompileFlags & OP_IS_NULL_RETURN)))
{
MethodInfo->NumReturnWithValue++;
}
else
{
MethodInfo->NumReturnNoValue++;
}
break;
case PARSEOP_BREAK:
case PARSEOP_CONTINUE:
Next = Op->Asl.Parent;
while (Next)
{
if (Next->Asl.ParseOpcode == PARSEOP_WHILE)
{
break;
}
Next = Next->Asl.Parent;
}
if (!Next)
{
AslError (ASL_ERROR, ASL_MSG_NO_WHILE, Op, NULL);
}
break;
case PARSEOP_STALL:
/* We can range check if the argument is an integer */
if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_INTEGER) &&
(Op->Asl.Child->Asl.Value.Integer > ACPI_UINT8_MAX))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_TIME, Op, NULL);
}
break;
case PARSEOP_DEVICE:
if (!ApFindNameInDeviceTree (METHOD_NAME__HID, Op) &&
!ApFindNameInDeviceTree (METHOD_NAME__ADR, Op))
{
AslError (ASL_WARNING, ASL_MSG_MISSING_DEPENDENCY, Op,
"Device object requires a _HID or _ADR in same scope");
}
break;
case PARSEOP_EVENT:
case PARSEOP_MUTEX:
case PARSEOP_OPERATIONREGION:
case PARSEOP_POWERRESOURCE:
case PARSEOP_PROCESSOR:
case PARSEOP_THERMALZONE:
/*
* The first operand is a name to be created in the namespace.
* Check against the reserved list.
*/
i = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
if (i < ACPI_VALID_RESERVED_NAME_MAX)
{
AslError (ASL_ERROR, ASL_MSG_RESERVED_USE,
Op, Op->Asl.ExternalName);
}
break;
case PARSEOP_NAME:
/* Typecheck any predefined names statically defined with Name() */
ApCheckForPredefinedObject (Op, Op->Asl.NameSeg);
/* Special typechecking for _HID */
if (!strcmp (METHOD_NAME__HID, Op->Asl.NameSeg))
{
Next = Op->Asl.Child->Asl.Next;
AnCheckId (Next, ASL_TYPE_HID);
}
/* Special typechecking for _CID */
else if (!strcmp (METHOD_NAME__CID, Op->Asl.NameSeg))
{
Next = Op->Asl.Child->Asl.Next;
if ((Next->Asl.ParseOpcode == PARSEOP_PACKAGE) ||
(Next->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE))
{
Next = Next->Asl.Child;
while (Next)
{
AnCheckId (Next, ASL_TYPE_CID);
Next = Next->Asl.Next;
}
}
else
{
AnCheckId (Next, ASL_TYPE_CID);
}
}
break;
default:
break;
}
/* Check for named object creation within a non-serialized method */
MtCheckNamedObjectInMethod (Op, MethodInfo);
return (AE_OK);
}