static ACPI_STATUS
AcpiDsBuildInternalObject (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE Type;
ACPI_FUNCTION_TRACE (DsBuildInternalObject);
*ObjDescPtr = NULL;
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
/*
* This is a named object reference. If this name was
* previously looked up in the namespace, it was stored in this op.
* Otherwise, go ahead and look it up now
*/
if (!Op->Common.Node)
{
Status = AcpiNsLookup (WalkState->ScopeInfo,
Op->Common.Value.String,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node)));
if (ACPI_FAILURE (Status))
{
/* Check if we are resolving a named reference within a package */
if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) &&
((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
{
/*
* We didn't find the target and we are populating elements
* of a package - ignore if slack enabled. Some ASL code
* contains dangling invalid references in packages and
* expects that no exception will be issued. Leave the
* element as a null element. It cannot be used, but it
* can be overwritten by subsequent ASL code - this is
* typically the case.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Ignoring unresolved reference in package [%4.4s]\n",
WalkState->ScopeInfo->Scope.Node->Name.Ascii));
return_ACPI_STATUS (AE_OK);
}
else
{
ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status);
}
return_ACPI_STATUS (Status);
}
}
/* Special object resolution for elements of a package */
if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))
{
/*
* Attempt to resolve the node to a value before we insert it into
* the package. If this is a reference to a common data type,
* resolve it immediately. According to the ACPI spec, package
* elements can only be "data objects" or method references.
* Attempt to resolve to an Integer, Buffer, String or Package.
* If cannot, return the named reference (for things like Devices,
* Methods, etc.) Buffer Fields and Fields will resolve to simple
* objects (int/buf/str/pkg).
*
* NOTE: References to things like Devices, Methods, Mutexes, etc.
* will remain as named references. This behavior is not described
* in the ACPI spec, but it appears to be an oversight.
*/
ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Op->Common.Node);
Status = AcpiExResolveNodeToValue (
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc),
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Special handling for Alias objects. We need to setup the type
* and the Op->Common.Node to point to the Alias target. Note,
* Alias has at most one level of indirection internally.
*/
Type = Op->Common.Node->Type;
if (Type == ACPI_TYPE_LOCAL_ALIAS)
{
Type = ObjDesc->Common.Type;
Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
Op->Common.Node->Object);
}
switch (Type)
{
/*
* For these types, we need the actual node, not the subobject.
* However, the subobject did not get an extra reference count above.
*
* TBD: should ExResolveNodeToValue be changed to fix this?
*/
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_THERMAL:
AcpiUtAddReference (Op->Common.Node->Object);
/*lint -fallthrough */
/*
* For these types, we need the actual node, not the subobject.
* The subobject got an extra reference count in ExResolveNodeToValue.
*/
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_METHOD:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
/* We will create a reference object for these types below */
break;
default:
/*
* All other types - the node was resolved to an actual
* object, we are done.
*/
goto Exit;
}
}
}
/* Create and init a new internal ACPI object */
ObjDesc = AcpiUtCreateInternalObject (
(AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Status = AcpiDsInitObjectFromOp (WalkState, Op, Op->Common.AmlOpcode,
&ObjDesc);
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
Exit:
*ObjDescPtr = ObjDesc;
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsCreateOperand (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Arg,
UINT32 ArgIndex)
{
ACPI_STATUS Status = AE_OK;
char *NameString;
UINT32 NameLength;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_PARSE_OBJECT *ParentOp;
UINT16 Opcode;
ACPI_INTERPRETER_MODE InterpreterMode;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_FUNCTION_TRACE_PTR (DsCreateOperand, Arg);
/* A valid name must be looked up in the namespace */
if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
(Arg->Common.Value.String) &&
!(Arg->Common.Flags & ACPI_PARSEOP_IN_STACK))
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg));
/* Get the entire name string from the AML stream */
Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer,
&NameString, &NameLength);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* All prefixes have been handled, and the name is in NameString */
/*
* Special handling for BufferField declarations. This is a deferred
* opcode that unfortunately defines the field name as the last
* parameter instead of the first. We get here when we are performing
* the deferred execution, so the actual name of the field is already
* in the namespace. We don't want to attempt to look it up again
* because we may be executing in a different scope than where the
* actual opcode exists.
*/
if ((WalkState->DeferredNode) &&
(WalkState->DeferredNode->Type == ACPI_TYPE_BUFFER_FIELD) &&
(ArgIndex == (UINT32) ((WalkState->Opcode == AML_CREATE_FIELD_OP) ? 3 : 2)))
{
ObjDesc = ACPI_CAST_PTR (
ACPI_OPERAND_OBJECT, WalkState->DeferredNode);
Status = AE_OK;
}
else /* All other opcodes */
{
/*
* Differentiate between a namespace "create" operation
* versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
* IMODE_EXECUTE) in order to support the creation of
* namespace objects during the execution of control methods.
*/
ParentOp = Arg->Common.Parent;
OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);
if ((OpInfo->Flags & AML_NSNODE) &&
(ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&
(ParentOp->Common.AmlOpcode != AML_REGION_OP) &&
(ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
{
/* Enter name into namespace if not found */
InterpreterMode = ACPI_IMODE_LOAD_PASS2;
}
else
{
/* Return a failure if name not found */
InterpreterMode = ACPI_IMODE_EXECUTE;
}
Status = AcpiNsLookup (WalkState->ScopeInfo, NameString,
ACPI_TYPE_ANY, InterpreterMode,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
WalkState,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc));
/*
* The only case where we pass through (ignore) a NOT_FOUND
* error is for the CondRefOf opcode.
*/
if (Status == AE_NOT_FOUND)
{
if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP)
{
/*
* For the Conditional Reference op, it's OK if
* the name is not found; We just need a way to
* indicate this to the interpreter, set the
* object to the root
*/
ObjDesc = ACPI_CAST_PTR (
ACPI_OPERAND_OBJECT, AcpiGbl_RootNode);
Status = AE_OK;
}
else
{
/*
* We just plain didn't find it -- which is a
* very serious error at this point
*/
Status = AE_AML_NAME_NOT_FOUND;
}
}
if (ACPI_FAILURE (Status))
{
ACPI_ERROR_NAMESPACE (NameString, Status);
}
}
/* Free the namestring created above */
ACPI_FREE (NameString);
/* Check status from the lookup */
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Put the resulting object onto the current object stack */
Status = AcpiDsObjStackPush (ObjDesc, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
}
else
{
/* Check for null name case */
if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
!(Arg->Common.Flags & ACPI_PARSEOP_IN_STACK))
{
/*
* If the name is null, this means that this is an
* optional result parameter that was not specified
* in the original ASL. Create a Zero Constant for a
* placeholder. (Store to a constant is a Noop.)
*/
Opcode = AML_ZERO_OP; /* Has no arguments! */
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Null namepath: Arg=%p\n", Arg));
}
else
{
Opcode = Arg->Common.AmlOpcode;
}
/* Get the object type of the argument */
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
if (OpInfo->ObjectType == ACPI_TYPE_INVALID)
{
return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
}
if ((OpInfo->Flags & AML_HAS_RETVAL) || (Arg->Common.Flags & ACPI_PARSEOP_IN_STACK))
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Argument previously created, already stacked\n"));
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (
WalkState->Operands [WalkState->NumOperands - 1], WalkState));
/*
* Use value that was already previously returned
* by the evaluation of this argument
*/
Status = AcpiDsResultPop (&ObjDesc, WalkState);
if (ACPI_FAILURE (Status))
{
/*
* Only error is underflow, and this indicates
* a missing or null operand!
*/
ACPI_EXCEPTION ((AE_INFO, Status,
"Missing or null operand"));
return_ACPI_STATUS (Status);
}
}
else
{
/* Create an ACPI_INTERNAL_OBJECT for the argument */
ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize the new object */
Status = AcpiDsInitObjectFromOp (
WalkState, Arg, Opcode, &ObjDesc);
if (ACPI_FAILURE (Status))
{
AcpiUtDeleteObjectDesc (ObjDesc);
return_ACPI_STATUS (Status);
}
}
/* Put the operand object on the object stack */
Status = AcpiDsObjStackPush (ObjDesc, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
}
return_ACPI_STATUS (AE_OK);
}
static acpi_status
acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
union acpi_operand_object **obj_desc_ptr)
{
union acpi_operand_object *obj_desc;
acpi_status status;
acpi_object_type type;
ACPI_FUNCTION_TRACE(ds_build_internal_object);
*obj_desc_ptr = NULL;
if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
/*
* This is a named object reference. If this name was
* previously looked up in the namespace, it was stored in this op.
* Otherwise, go ahead and look it up now
*/
if (!op->common.node) {
status = acpi_ns_lookup(walk_state->scope_info,
op->common.value.string,
ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT |
ACPI_NS_DONT_OPEN_SCOPE, NULL,
ACPI_CAST_INDIRECT_PTR(struct
acpi_namespace_node,
&(op->
common.
node)));
if (ACPI_FAILURE(status)) {
/* Check if we are resolving a named reference within a package */
if ((status == AE_NOT_FOUND)
&& (acpi_gbl_enable_interpreter_slack)
&&
((op->common.parent->common.aml_opcode ==
AML_PACKAGE_OP)
|| (op->common.parent->common.aml_opcode ==
AML_VAR_PACKAGE_OP))) {
/*
* We didn't find the target and we are populating elements
* of a package - ignore if slack enabled. Some ASL code
* contains dangling invalid references in packages and
* expects that no exception will be issued. Leave the
* element as a null element. It cannot be used, but it
* can be overwritten by subsequent ASL code - this is
* typically the case.
*/
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Ignoring unresolved reference in package [%4.4s]\n",
walk_state->
scope_info->scope.
node->name.ascii));
return_ACPI_STATUS(AE_OK);
} else {
ACPI_ERROR_NAMESPACE(op->common.value.
string, status);
}
return_ACPI_STATUS(status);
}
}
/* Special object resolution for elements of a package */
if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
(op->common.parent->common.aml_opcode ==
AML_VAR_PACKAGE_OP)) {
/*
* Attempt to resolve the node to a value before we insert it into
* the package. If this is a reference to a common data type,
* resolve it immediately. According to the ACPI spec, package
* elements can only be "data objects" or method references.
* Attempt to resolve to an Integer, Buffer, String or Package.
* If cannot, return the named reference (for things like Devices,
* Methods, etc.) Buffer Fields and Fields will resolve to simple
* objects (int/buf/str/pkg).
*
* NOTE: References to things like Devices, Methods, Mutexes, etc.
* will remain as named references. This behavior is not described
* in the ACPI spec, but it appears to be an oversight.
*/
obj_desc =
ACPI_CAST_PTR(union acpi_operand_object,
op->common.node);
status =
acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
(struct
acpi_namespace_node,
&obj_desc),
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Special handling for Alias objects. We need to setup the type
* and the Op->Common.Node to point to the Alias target. Note,
* Alias has at most one level of indirection internally.
*/
type = op->common.node->type;
if (type == ACPI_TYPE_LOCAL_ALIAS) {
type = obj_desc->common.type;
op->common.node =
ACPI_CAST_PTR(struct acpi_namespace_node,
op->common.node->object);
}
ACPI_STATUS
AcpiDsBuildInternalObject (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (DsBuildInternalObject);
*ObjDescPtr = NULL;
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
/*
* This is a named object reference. If this name was
* previously looked up in the namespace, it was stored in
* this op. Otherwise, go ahead and look it up now
*/
if (!Op->Common.Node)
{
/* Check if we are resolving a named reference within a package */
if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP))
{
/*
* We won't resolve package elements here, we will do this
* after all ACPI tables are loaded into the namespace. This
* behavior supports both forward references to named objects
* and external references to objects in other tables.
*/
goto CreateNewObject;
}
else
{
Status = AcpiNsLookup (WalkState->ScopeInfo,
Op->Common.Value.String,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
ACPI_CAST_INDIRECT_PTR (
ACPI_NAMESPACE_NODE, &(Op->Common.Node)));
if (ACPI_FAILURE (Status))
{
ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
Op->Common.Value.String, Status);
return_ACPI_STATUS (Status);
}
}
}
}
CreateNewObject:
/* Create and init a new internal ACPI object */
ObjDesc = AcpiUtCreateInternalObject (
(AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Status = AcpiDsInitObjectFromOp (
WalkState, Op, Op->Common.AmlOpcode, &ObjDesc);
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*
* Handling for unresolved package reference elements.
* These are elements that are namepaths.
*/
if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP))
{
ObjDesc->Reference.Resolved = TRUE;
if ((Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
!ObjDesc->Reference.Node)
{
/*
* Name was unresolved above.
* Get the prefix node for later lookup
*/
ObjDesc->Reference.Node = WalkState->ScopeInfo->Scope.Node;
ObjDesc->Reference.Aml = Op->Common.Aml;
ObjDesc->Reference.Resolved = FALSE;
}
}
*ObjDescPtr = ObjDesc;
return_ACPI_STATUS (Status);
}
acpi_status
acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
union acpi_parse_object ** out_op)
{
union acpi_parse_object *op;
struct acpi_namespace_node *node;
acpi_status status;
acpi_object_type object_type;
char *path;
u32 flags;
ACPI_FUNCTION_TRACE(ds_load1_begin_op);
op = walk_state->op;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
walk_state));
/* We are only interested in opcodes that have an associated name */
if (op) {
if (!(walk_state->op_info->flags & AML_NAMED)) {
*out_op = op;
return_ACPI_STATUS(AE_OK);
}
/* Check if this object has already been installed in the namespace */
if (op->common.node) {
*out_op = op;
return_ACPI_STATUS(AE_OK);
}
}
path = acpi_ps_get_next_namestring(&walk_state->parser_state);
/* Map the raw opcode into an internal object type */
object_type = walk_state->op_info->object_type;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"State=%p Op=%p [%s]\n", walk_state, op,
acpi_ut_get_type_name(object_type)));
switch (walk_state->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 =
acpi_ns_lookup(walk_state->scope_info, path, object_type,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
walk_state, &(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.
*/
acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
status =
acpi_ns_lookup(walk_state->scope_info, path,
object_type, ACPI_IMODE_LOAD_PASS1,
ACPI_NS_SEARCH_PARENT, walk_state,
&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 (Scope)\n",
path,
acpi_ut_get_type_name(node->type)));
node->type = ACPI_TYPE_ANY;
walk_state->scope_info->common.value = ACPI_TYPE_ANY;
break;
default:
/* All other types are an error */
ACPI_ERROR((AE_INFO,
"Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
acpi_ut_get_type_name(node->type), path));
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 (op_region, Buffer,
* buffer_field, or Package), the name of the object is already
* in the namespace.
*/
if (walk_state->deferred_node) {
/* This name is already in the namespace, get the node */
node = walk_state->deferred_node;
status = AE_OK;
break;
}
/*
* If we are executing a method, do not create any namespace objects
* during the load phase, only during execution.
*/
if (walk_state->method_node) {
node = NULL;
status = AE_OK;
break;
}
flags = ACPI_NS_NO_UPSEARCH;
if ((walk_state->opcode != AML_SCOPE_OP) &&
(!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
flags |= ACPI_NS_ERROR_IF_FOUND;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"[%s] Cannot already exist\n",
acpi_ut_get_type_name(object_type)));
} else {
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"[%s] Both Find or Create allowed\n",
acpi_ut_get_type_name(object_type)));
}
/*
* 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 =
acpi_ns_lookup(walk_state->scope_info, path, object_type,
ACPI_IMODE_LOAD_PASS1, flags, walk_state,
&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 = (u8) object_type;
/* Just retyped a node, probably will need to open a scope */
if (acpi_ns_opens_scope(object_type)) {
status =
acpi_ds_scope_stack_push
(node, object_type,
walk_state);
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 = acpi_ps_alloc_op(walk_state->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(u8, 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;
}
acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
op);
*out_op = op;
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);
}
static ACPI_STATUS
AcpiDsBuildInternalObject (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (DsBuildInternalObject);
*ObjDescPtr = NULL;
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
/*
* This is a named object reference. If this name was
* previously looked up in the namespace, it was stored in this op.
* Otherwise, go ahead and look it up now
*/
if (!Op->Common.Node)
{
Status = AcpiNsLookup (WalkState->ScopeInfo,
Op->Common.Value.String,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node)));
if (ACPI_FAILURE (Status))
{
/* Check if we are resolving a named reference within a package */
if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) &&
((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
{
/*
* We didn't find the target and we are populating elements
* of a package - ignore if slack enabled. Some ASL code
* contains dangling invalid references in packages and
* expects that no exception will be issued. Leave the
* element as a null element. It cannot be used, but it
* can be overwritten by subsequent ASL code - this is
* typically the case.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Ignoring unresolved reference in package [%4.4s]\n",
WalkState->ScopeInfo->Scope.Node->Name.Ascii));
return_ACPI_STATUS (AE_OK);
}
else
{
ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status);
}
return_ACPI_STATUS (Status);
}
}
}
/* Create and init a new internal ACPI object */
ObjDesc = AcpiUtCreateInternalObject (
(AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Status = AcpiDsInitObjectFromOp (WalkState, Op, Op->Common.AmlOpcode,
&ObjDesc);
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
*ObjDescPtr = ObjDesc;
return_ACPI_STATUS (AE_OK);
}
static acpi_status
acpi_ds_get_field_names(struct acpi_create_field_info *info,
struct acpi_walk_state *walk_state,
union acpi_parse_object *arg)
{
acpi_status status;
u64 position;
union acpi_parse_object *child;
ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info);
/* First field starts at bit zero */
info->field_bit_position = 0;
/* Process all elements in the field list (of parse nodes) */
while (arg) {
/*
* Four types of field elements are handled:
* 1) name - Enters a new named field into the namespace
* 2) offset - specifies a bit offset
* 3) access_as - changes the access mode/attributes
* 4) connection - Associate a resource template with the field
*/
switch (arg->common.aml_opcode) {
case AML_INT_RESERVEDFIELD_OP:
position = (u64) info->field_bit_position
+ (u64) arg->common.value.size;
if (position > ACPI_UINT32_MAX) {
ACPI_ERROR((AE_INFO,
"Bit offset within field too large (> 0xFFFFFFFF)"));
return_ACPI_STATUS(AE_SUPPORT);
}
info->field_bit_position = (u32) position;
break;
case AML_INT_ACCESSFIELD_OP:
case AML_INT_EXTACCESSFIELD_OP:
/*
* Get new access_type, access_attribute, and access_length fields
* -- to be used for all field units that follow, until the
* end-of-field or another access_as keyword is encountered.
* NOTE. These three bytes are encoded in the integer value
* of the parseop for convenience.
*
* In field_flags, preserve the flag bits other than the
* ACCESS_TYPE bits.
*/
/* access_type (byte_acc, word_acc, etc.) */
info->field_flags = (u8)
((info->
field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
((u8)((u32)(arg->common.value.integer & 0x07))));
/* access_attribute (attrib_quick, attrib_byte, etc.) */
info->attribute =
(u8)((arg->common.value.integer >> 8) & 0xFF);
/* access_length (for serial/buffer protocols) */
info->access_length =
(u8)((arg->common.value.integer >> 16) & 0xFF);
break;
case AML_INT_CONNECTION_OP:
/*
* Clear any previous connection. New connection is used for all
* fields that follow, similar to access_as
*/
info->resource_buffer = NULL;
info->connection_node = NULL;
info->pin_number_index = 0;
/*
* A Connection() is either an actual resource descriptor (buffer)
* or a named reference to a resource template
*/
child = arg->common.value.arg;
if (child->common.aml_opcode == AML_INT_BYTELIST_OP) {
info->resource_buffer = child->named.data;
info->resource_length =
(u16)child->named.value.integer;
} else {
/* Lookup the Connection() namepath, it should already exist */
status = acpi_ns_lookup(walk_state->scope_info,
child->common.value.
name, ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE,
ACPI_NS_DONT_OPEN_SCOPE,
walk_state,
&info->connection_node);
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE(child->common.
value.name,
status);
return_ACPI_STATUS(status);
}
}
break;
case AML_INT_NAMEDFIELD_OP:
/* Lookup the name, it should already exist */
status = acpi_ns_lookup(walk_state->scope_info,
(char *)&arg->named.name,
info->field_type,
ACPI_IMODE_EXECUTE,
ACPI_NS_DONT_OPEN_SCOPE,
walk_state, &info->field_node);
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE((char *)&arg->named.name,
status);
return_ACPI_STATUS(status);
} else {
arg->common.node = info->field_node;
info->field_bit_length = arg->common.value.size;
/*
* If there is no object attached to the node, this node was
* just created and we need to create the field object.
* Otherwise, this was a lookup of an existing node and we
* don't want to create the field object again.
*/
if (!acpi_ns_get_attached_object
(info->field_node)) {
status = acpi_ex_prep_field_value(info);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
}
/* Keep track of bit position for the next field */
position = (u64) info->field_bit_position
+ (u64) arg->common.value.size;
if (position > ACPI_UINT32_MAX) {
ACPI_ERROR((AE_INFO,
"Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
ACPI_CAST_PTR(char,
&info->field_node->
name)));
return_ACPI_STATUS(AE_SUPPORT);
}
info->field_bit_position += info->field_bit_length;
info->pin_number_index++; /* Index relative to previous Connection() */
break;
default:
ACPI_ERROR((AE_INFO,
"Invalid opcode in field list: 0x%X",
arg->common.aml_opcode));
return_ACPI_STATUS(AE_AML_BAD_OPCODE);
}
arg = arg->common.next;
}
acpi_status
acpi_ds_create_buffer_field(union acpi_parse_object *op,
struct acpi_walk_state *walk_state)
{
union acpi_parse_object *arg;
struct acpi_namespace_node *node;
acpi_status status;
union acpi_operand_object *obj_desc;
union acpi_operand_object *second_desc = NULL;
u32 flags;
ACPI_FUNCTION_TRACE(ds_create_buffer_field);
/*
* Get the name_string argument (name of the new buffer_field)
*/
if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
/* For create_field, name is the 4th argument */
arg = acpi_ps_get_arg(op, 3);
} else {
/* For all other create_XXXField operators, name is the 3rd argument */
arg = acpi_ps_get_arg(op, 2);
}
if (!arg) {
return_ACPI_STATUS(AE_AML_NO_OPERAND);
}
if (walk_state->deferred_node) {
node = walk_state->deferred_node;
status = AE_OK;
} else {
/* Execute flag should always be set when this function is entered */
if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
return_ACPI_STATUS(AE_AML_INTERNAL);
}
/* Creating new namespace node, should not already exist */
flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
ACPI_NS_ERROR_IF_FOUND;
/*
* Mark node temporary if we are executing a normal control
* method. (Don't mark if this is a module-level code method)
*/
if (walk_state->method_node &&
!(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
flags |= ACPI_NS_TEMPORARY;
}
/* Enter the name_string into the namespace */
status =
acpi_ns_lookup(walk_state->scope_info,
arg->common.value.string, ACPI_TYPE_ANY,
ACPI_IMODE_LOAD_PASS1, flags, walk_state,
&node);
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
return_ACPI_STATUS(status);
}
}
/*
* We could put the returned object (Node) on the object stack for later,
* but for now, we will put it in the "op" object that the parser uses,
* so we can get it again at the end of this scope.
*/
op->common.node = node;
/*
* If there is no object attached to the node, this node was just created
* and we need to create the field object. Otherwise, this was a lookup
* of an existing node and we don't want to create the field object again.
*/
obj_desc = acpi_ns_get_attached_object(node);
if (obj_desc) {
return_ACPI_STATUS(AE_OK);
}
/*
* The Field definition is not fully parsed at this time.
* (We must save the address of the AML for the buffer and index operands)
*/
/* Create the buffer field object */
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD);
if (!obj_desc) {
status = AE_NO_MEMORY;
goto cleanup;
}
/*
* Remember location in AML stream of the field unit opcode and operands --
* since the buffer and index operands must be evaluated.
*/
second_desc = obj_desc->common.next_object;
second_desc->extra.aml_start = op->named.data;
second_desc->extra.aml_length = op->named.length;
obj_desc->buffer_field.node = node;
/* Attach constructed field descriptors to parent node */
status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
cleanup:
/* Remove local reference to the object */
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
ACPI_STATUS
AcpiNsConvertToReference (
ACPI_NAMESPACE_NODE *Scope,
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject)
{
ACPI_OPERAND_OBJECT *NewObject = NULL;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_GENERIC_STATE ScopeInfo;
char *Name;
ACPI_FUNCTION_NAME (NsConvertToReference);
/* Convert path into internal presentation */
Status = AcpiNsInternalizeName (OriginalObject->String.Pointer, &Name);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Find the namespace node */
ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Scope);
Status = AcpiNsLookup (&ScopeInfo, Name,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
if (ACPI_FAILURE (Status))
{
/* Check if we are resolving a named reference within a package */
ACPI_ERROR_NAMESPACE (&ScopeInfo,
OriginalObject->String.Pointer, Status);
goto ErrorExit;
}
/* Create and init a new internal ACPI object */
NewObject = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
if (!NewObject)
{
Status = AE_NO_MEMORY;
goto ErrorExit;
}
NewObject->Reference.Node = Node;
NewObject->Reference.Object = Node->Object;
NewObject->Reference.Class = ACPI_REFCLASS_NAME;
/*
* Increase reference of the object if needed (the object is likely a
* null for device nodes).
*/
AcpiUtAddReference (Node->Object);
ErrorExit:
ACPI_FREE (Name);
*ReturnObject = NewObject;
return (AE_OK);
}
static acpi_status
acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
union acpi_operand_object **obj_desc_ptr)
{
union acpi_operand_object *obj_desc;
acpi_status status;
ACPI_FUNCTION_TRACE(ds_build_internal_object);
*obj_desc_ptr = NULL;
if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
/*
* This is a named object reference. If this name was
* previously looked up in the namespace, it was stored in this op.
* Otherwise, go ahead and look it up now
*/
if (!op->common.node) {
status = acpi_ns_lookup(walk_state->scope_info,
op->common.value.string,
ACPI_TYPE_ANY,
ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT |
ACPI_NS_DONT_OPEN_SCOPE, NULL,
ACPI_CAST_INDIRECT_PTR(struct
acpi_namespace_node,
&(op->
common.
node)));
if (ACPI_FAILURE(status)) {
/* Check if we are resolving a named reference within a package */
if ((status == AE_NOT_FOUND)
&& (acpi_gbl_enable_interpreter_slack)
&&
((op->common.parent->common.aml_opcode ==
AML_PACKAGE_OP)
|| (op->common.parent->common.aml_opcode ==
AML_VAR_PACKAGE_OP))) {
/*
* We didn't find the target and we are populating elements
* of a package - ignore if slack enabled. Some ASL code
* contains dangling invalid references in packages and
* expects that no exception will be issued. Leave the
* element as a null element. It cannot be used, but it
* can be overwritten by subsequent ASL code - this is
* typically the case.
*/
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Ignoring unresolved reference in package [%4.4s]\n",
walk_state->
scope_info->scope.
node->name.ascii));
return_ACPI_STATUS(AE_OK);
} else {
ACPI_ERROR_NAMESPACE(op->common.value.
string, status);
}
return_ACPI_STATUS(status);
}
}
/* Special object resolution for elements of a package */
if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
(op->common.parent->common.aml_opcode ==
AML_VAR_PACKAGE_OP)) {
/*
* Attempt to resolve the node to a value before we insert it into
* the package. If this is a reference to a common data type,
* resolve it immediately. According to the ACPI spec, package
* elements can only be "data objects" or method references.
* Attempt to resolve to an Integer, Buffer, String or Package.
* If cannot, return the named reference (for things like Devices,
* Methods, etc.) Buffer Fields and Fields will resolve to simple
* objects (int/buf/str/pkg).
*
* NOTE: References to things like Devices, Methods, Mutexes, etc.
* will remain as named references. This behavior is not described
* in the ACPI spec, but it appears to be an oversight.
*/
obj_desc =
ACPI_CAST_PTR(union acpi_operand_object,
op->common.node);
status =
acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
(struct
acpi_namespace_node,
&obj_desc),
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
switch (op->common.node->type) {
/*
* For these types, we need the actual node, not the subobject.
* However, the subobject did not get an extra reference count above.
*
* TBD: should ex_resolve_node_to_value be changed to fix this?
*/
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_THERMAL:
acpi_ut_add_reference(op->common.node->object);
/*lint -fallthrough */
/*
* For these types, we need the actual node, not the subobject.
* The subobject got an extra reference count in ex_resolve_node_to_value.
*/
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_METHOD:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
/* We will create a reference object for these types below */
break;
default:
/*
* All other types - the node was resolved to an actual
* object, we are done.
*/
goto exit;
}
}
