/******************************************************************************
*
* Module Name: dswload - Dispatcher namespace load callbacks
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __ASLLOAD_C__
#include "aslcompiler.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "aslcompiler.y.h"
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslload")
/* Local prototypes */
static ACPI_STATUS
LdLoadFieldElements (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState);
static ACPI_STATUS
LdLoadResourceElements (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState);
static ACPI_STATUS
LdNamespace1Begin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
static ACPI_STATUS
LdNamespace2Begin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
static ACPI_STATUS
LdCommonNamespaceEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
/*******************************************************************************
*
* FUNCTION: LdLoadNamespace
*
* PARAMETERS: RootOp - Root of the parse tree
*
* RETURN: Status
*
* DESCRIPTION: Perform a walk of the parse tree that in turn loads all of the
* named ASL/AML objects into the namespace. The namespace is
* constructed in order to resolve named references and references
* to named fields within resource templates/descriptors.
*
******************************************************************************/
ACPI_STATUS
LdLoadNamespace (
ACPI_PARSE_OBJECT *RootOp)
{
ACPI_WALK_STATE *WalkState;
DbgPrint (ASL_DEBUG_OUTPUT, "\nCreating namespace\n\n");
/* Create a new walk state */
WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
if (!WalkState)
{
return AE_NO_MEMORY;
}
/* Walk the entire parse tree, first pass */
TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace1Begin,
LdCommonNamespaceEnd, WalkState);
/* Second pass to handle forward references */
TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace2Begin,
LdCommonNamespaceEnd, WalkState);
/* Dump the namespace if debug is enabled */
AcpiNsDumpTables (ACPI_NS_ALL, ACPI_UINT32_MAX);
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: LdLoadFieldElements
*
* PARAMETERS: Op - Parent node (Field)
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Enter the named elements of the field (children of the parent)
* into the namespace.
*
******************************************************************************/
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:
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);
}
/*
* The name already exists in this scope
* But continue processing the elements
*/
AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Child,
Child->Asl.Value.String);
}
else
{
Child->Asl.Node = Node;
Node->Op = Child;
}
break;
}
Child = Child->Asl.Next;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LdLoadResourceElements
*
* PARAMETERS: Op - Parent node (Resource Descriptor)
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Enter the named elements of the resource descriptor (children
* of the parent) into the namespace.
*
* NOTE: In the real AML namespace, these named elements never exist. But
* we simply use the namespace here as a symbol table so we can look
* them up as they are referenced.
*
******************************************************************************/
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 */
AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS,
(ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod, Op->Asl.Namepath);
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 in the namespace node so it
* can be used when the field is referenced
*/
Node->Value = (UINT32) InitializerOp->Asl.Value.Integer;
InitializerOp->Asl.Node = Node;
Node->Op = InitializerOp;
/* Pass thru the field type (Bitfield or Bytefield) */
if (InitializerOp->Asl.CompileFlags & NODE_IS_BIT_OFFSET)
{
Node->Flags |= ANOBJ_IS_BIT_OFFSET;
}
}
InitializerOp = ASL_GET_PEER_NODE (InitializerOp);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LdNamespace1Begin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback used during the parse tree walk. If this
* is a named AML opcode, enter into the namespace
*
******************************************************************************/
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);
}
/*******************************************************************************
*
* FUNCTION: LdNamespace2Begin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback used during the pass 2 parse tree walk.
* Second pass resolves some forward references.
*
* Notes:
* Currently only needs to handle the Alias operator.
* Could be used to allow forward references from the Scope() operator, but
* the MS interpreter does not allow this, so this compiler does not either.
*
******************************************************************************/
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);
}
/*******************************************************************************
*
* FUNCTION: LdCommonNamespaceEnd
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback used during the loading of the namespace,
* We only need to worry about managing the scope stack here.
*
******************************************************************************/
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);
}