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/******************************************************************************
*
* Module Name: asllookup- Namespace lookup
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <contrib/dev/acpica/compiler/aslcompiler.h>
#include "aslcompiler.y.h"
#include <contrib/dev/acpica/include/acparser.h>
#include <contrib/dev/acpica/include/amlcode.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#include <contrib/dev/acpica/include/acdispat.h>
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("asllookup")
/* Local prototypes */
static ACPI_STATUS
LsCompareOneNamespaceObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static ACPI_STATUS
LsDoOneNamespaceObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static BOOLEAN
LkObjectExists (
char *Name);
static void
LkCheckFieldRange (
ACPI_PARSE_OBJECT *Op,
UINT32 RegionBitLength,
UINT32 FieldBitOffset,
UINT32 FieldBitLength,
UINT32 AccessBitWidth);
static ACPI_STATUS
LkNamespaceLocateBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
static ACPI_STATUS
LkNamespaceLocateEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
static ACPI_STATUS
LkIsObjectUsed (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static ACPI_STATUS
LsDoOnePathname (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static ACPI_PARSE_OBJECT *
LkGetNameOp (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* FUNCTION: LsDoOneNamespaceObject
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Dump a namespace object to the namespace output file.
* Called during the walk of the namespace to dump all objects.
*
******************************************************************************/
static ACPI_STATUS
LsDoOneNamespaceObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_PARSE_OBJECT *Op;
Gbl_NumNamespaceObjects++;
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "%5u [%u] %*s %4.4s - %s",
Gbl_NumNamespaceObjects, Level, (Level * 3), " ",
&Node->Name,
AcpiUtGetTypeName (Node->Type));
Op = Node->Op;
ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Node->Object);
if (!Op)
{
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "\n");
return (AE_OK);
}
if ((ObjDesc) &&
(ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) == ACPI_DESC_TYPE_OPERAND))
{
switch (Node->Type)
{
case ACPI_TYPE_INTEGER:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Initial Value 0x%8.8X%8.8X]",
ACPI_FORMAT_UINT64 (ObjDesc->Integer.Value));
break;
case ACPI_TYPE_STRING:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Initial Value \"%s\"]",
ObjDesc->String.Pointer);
break;
default:
/* Nothing to do for other types */
break;
}
}
else
{
switch (Node->Type)
{
case ACPI_TYPE_INTEGER:
if (Op->Asl.ParseOpcode == PARSEOP_NAME)
{
Op = Op->Asl.Child;
}
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING))
{
Op = Op->Asl.Next;
}
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Initial Value 0x%8.8X%8.8X]",
ACPI_FORMAT_UINT64 (Op->Asl.Value.Integer));
break;
case ACPI_TYPE_STRING:
if (Op->Asl.ParseOpcode == PARSEOP_NAME)
{
Op = Op->Asl.Child;
}
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING))
{
Op = Op->Asl.Next;
}
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Initial Value \"%s\"]",
Op->Asl.Value.String);
break;
case ACPI_TYPE_LOCAL_REGION_FIELD:
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING))
{
Op = Op->Asl.Child;
}
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Offset 0x%04X Length 0x%04X bits]",
Op->Asl.Parent->Asl.ExtraValue, (UINT32) Op->Asl.Value.Integer);
break;
case ACPI_TYPE_BUFFER_FIELD:
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_CREATEBYTEFIELD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, " [BYTE ( 8 bit)]");
break;
case PARSEOP_CREATEDWORDFIELD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, " [DWORD (32 bit)]");
break;
case PARSEOP_CREATEQWORDFIELD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, " [QWORD (64 bit)]");
break;
case PARSEOP_CREATEWORDFIELD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, " [WORD (16 bit)]");
break;
case PARSEOP_CREATEBITFIELD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, " [BIT ( 1 bit)]");
break;
case PARSEOP_CREATEFIELD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, " [Arbitrary Bit Field]");
break;
default:
break;
}
break;
case ACPI_TYPE_PACKAGE:
if (Op->Asl.ParseOpcode == PARSEOP_NAME)
{
Op = Op->Asl.Child;
}
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING))
{
Op = Op->Asl.Next;
}
Op = Op->Asl.Child;
if ((Op->Asl.ParseOpcode == PARSEOP_BYTECONST) ||
(Op->Asl.ParseOpcode == PARSEOP_RAW_DATA))
{
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Initial Length 0x%.2X elements]",
Op->Asl.Value.Integer);
}
break;
case ACPI_TYPE_BUFFER:
if (Op->Asl.ParseOpcode == PARSEOP_NAME)
{
Op = Op->Asl.Child;
}
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING))
{
Op = Op->Asl.Next;
}
Op = Op->Asl.Child;
if (Op && (Op->Asl.ParseOpcode == PARSEOP_INTEGER))
{
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Initial Length 0x%.2X bytes]",
Op->Asl.Value.Integer);
}
break;
case ACPI_TYPE_METHOD:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Code Length 0x%.4X bytes]",
Op->Asl.AmlSubtreeLength);
break;
case ACPI_TYPE_LOCAL_RESOURCE:
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Desc Offset 0x%.4X Bytes]", Node->Value);
break;
case ACPI_TYPE_LOCAL_RESOURCE_FIELD:
if (Node->Flags & 0x80)
{
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Field Offset 0x%.4X Bits 0x%.4X Bytes]",
Node->Value, Node->Value / 8);
}
else
{
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT,
" [Field Offset 0x%.4X Bytes]", Node->Value);
}
break;
default:
/* Nothing to do for other types */
break;
}
}
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "\n");
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LsSetupNsList
*
* PARAMETERS: Handle - local file handle
*
* RETURN: None
*
* DESCRIPTION: Set the namespace output file to the input handle
*
******************************************************************************/
void
LsSetupNsList (
void *Handle)
{
Gbl_NsOutputFlag = TRUE;
Gbl_Files[ASL_FILE_NAMESPACE_OUTPUT].Handle = Handle;
}
/*******************************************************************************
*
* FUNCTION: LsDoOnePathname
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Print the full pathname for a namespace node.
*
******************************************************************************/
static ACPI_STATUS
LsDoOnePathname (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
ACPI_STATUS Status;
ACPI_BUFFER TargetPath;
TargetPath.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
Status = AcpiNsHandleToPathname (Node, &TargetPath);
if (ACPI_FAILURE (Status))
{
return (Status);
}
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "%s\n", TargetPath.Pointer);
ACPI_FREE (TargetPath.Pointer);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LsDisplayNamespace
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Walk the namespace an display information about each node
* in the tree. Information is written to the optional
* namespace output file.
*
******************************************************************************/
ACPI_STATUS
LsDisplayNamespace (
void)
{
ACPI_STATUS Status;
if (!Gbl_NsOutputFlag)
{
return (AE_OK);
}
Gbl_NumNamespaceObjects = 0;
/* File header */
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "Contents of ACPI Namespace\n\n");
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "Count Depth Name - Type\n\n");
/* Walk entire namespace from the root */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, LsDoOneNamespaceObject, NULL,
NULL, NULL);
/* Print the full pathname for each namespace node */
FlPrintFile (ASL_FILE_NAMESPACE_OUTPUT, "\nNamespace pathnames\n\n");
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, LsDoOnePathname, NULL,
NULL, NULL);
return (Status);
}
/*******************************************************************************
*
* FUNCTION: LsCompareOneNamespaceObject
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Compare name of one object.
*
******************************************************************************/
static ACPI_STATUS
LsCompareOneNamespaceObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
/* Simply check the name */
if (*((UINT32 *) (Context)) == Node->Name.Integer)
{
/* Abort walk if we found one instance */
return (AE_CTRL_TRUE);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LkObjectExists
*
* PARAMETERS: Name - 4 char ACPI name
*
* RETURN: TRUE if name exists in namespace
*
* DESCRIPTION: Walk the namespace to find an object
*
******************************************************************************/
static BOOLEAN
LkObjectExists (
char *Name)
{
ACPI_STATUS Status;
/* Walk entire namespace from the supplied root */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, LsCompareOneNamespaceObject, NULL,
Name, NULL);
if (Status == AE_CTRL_TRUE)
{
/* At least one instance of the name was found */
return (TRUE);
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: LkGetNameOp
*
* PARAMETERS: Op - Current Op
*
* RETURN: NameOp associated with the input op
*
* DESCRIPTION: Find the name declaration op associated with the operator
*
******************************************************************************/
static ACPI_PARSE_OBJECT *
LkGetNameOp (
ACPI_PARSE_OBJECT *Op)
{
const ACPI_OPCODE_INFO *OpInfo;
ACPI_PARSE_OBJECT *NameOp = Op;
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
/* Get the NamePath from the appropriate place */
if (OpInfo->Flags & AML_NAMED)
{
/* For nearly all NAMED operators, the name reference is the first child */
NameOp = Op->Asl.Child;
if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
{
/*
* ALIAS is the only oddball opcode, the name declaration
* (alias name) is the second operand
*/
NameOp = Op->Asl.Child->Asl.Next;
}
}
else if (OpInfo->Flags & AML_CREATE)
{
/* Name must appear as the last parameter */
NameOp = Op->Asl.Child;
while (!(NameOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION))
{
NameOp = NameOp->Asl.Next;
}
}
return (NameOp);
}
/*******************************************************************************
*
* FUNCTION: LkIsObjectUsed
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Check for an unreferenced namespace object and emit a warning.
* We have to be careful, because some types and names are
* typically or always unreferenced, we don't want to issue
* excessive warnings.
*
******************************************************************************/
static ACPI_STATUS
LkIsObjectUsed (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
/* Referenced flag is set during the namespace xref */
if (Node->Flags & ANOBJ_IS_REFERENCED)
{
return (AE_OK);
}
/*
* Ignore names that start with an underscore,
* these are the reserved ACPI names and are typically not referenced,
* they are called by the host OS.
*/
if (Node->Name.Ascii[0] == '_')
{
return (AE_OK);
}
/* There are some types that are typically not referenced, ignore them */
switch (Node->Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_POWER:
case ACPI_TYPE_LOCAL_RESOURCE:
return (AE_OK);
default:
break;
}
/* All others are valid unreferenced namespace objects */
if (Node->Op)
{
AslError (ASL_WARNING2, ASL_MSG_NOT_REFERENCED, LkGetNameOp (Node->Op), NULL);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LkFindUnreferencedObjects
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Namespace walk to find objects that are not referenced in any
* way. Must be called after the namespace has been cross
* referenced.
*
******************************************************************************/
void
LkFindUnreferencedObjects (
void)
{
/* Walk entire namespace from the supplied root */
(void) AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, LkIsObjectUsed, NULL,
NULL, NULL);
}
/*******************************************************************************
*
* FUNCTION: LkCrossReferenceNamespace
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Perform a cross reference check of the parse tree against the
* namespace. Every named referenced within the parse tree
* should be get resolved with a namespace lookup. If not, the
* original reference in the ASL code is invalid -- i.e., refers
* to a non-existent object.
*
* NOTE: The ASL "External" operator causes the name to be inserted into the
* namespace so that references to the external name will be resolved
* correctly here.
*
******************************************************************************/
ACPI_STATUS
LkCrossReferenceNamespace (
void)
{
ACPI_WALK_STATE *WalkState;
DbgPrint (ASL_DEBUG_OUTPUT, "\nCross referencing namespace\n\n");
/*
* Create a new walk state for use when looking up names
* within the namespace (Passed as context to the callbacks)
*/
WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
if (!WalkState)
{
return AE_NO_MEMORY;
}
/* Walk the entire parse tree */
TrWalkParseTree (RootNode, ASL_WALK_VISIT_TWICE, LkNamespaceLocateBegin,
LkNamespaceLocateEnd, WalkState);
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: LkCheckFieldRange
*
* PARAMETERS: RegionBitLength - Length of entire parent region
* FieldBitOffset - Start of the field unit (within region)
* FieldBitLength - Entire length of field unit
* AccessBitWidth - Access width of the field unit
*
* RETURN: None
*
* DESCRIPTION: Check one field unit to make sure it fits in the parent
* op region.
*
* Note: AccessBitWidth must be either 8,16,32, or 64
*
******************************************************************************/
static void
LkCheckFieldRange (
ACPI_PARSE_OBJECT *Op,
UINT32 RegionBitLength,
UINT32 FieldBitOffset,
UINT32 FieldBitLength,
UINT32 AccessBitWidth)
{
UINT32 FieldEndBitOffset;
/*
* Check each field unit against the region size. The entire
* field unit (start offset plus length) must fit within the
* region.
*/
FieldEndBitOffset = FieldBitOffset + FieldBitLength;
if (FieldEndBitOffset > RegionBitLength)
{
/* Field definition itself is beyond the end-of-region */
AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL);
return;
}
/*
* Now check that the field plus AccessWidth doesn't go beyond
* the end-of-region. Assumes AccessBitWidth is a power of 2
*/
FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth);
if (FieldEndBitOffset > RegionBitLength)
{
/* Field definition combined with the access is beyond EOR */
AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL);
}
}
/*******************************************************************************
*
* FUNCTION: LkNamespaceLocateBegin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback used during cross-reference. For named
* object references, attempt to locate the name in the
* namespace.
*
* NOTE: ASL references to named fields within resource descriptors are
* resolved to integer values here. Therefore, this step is an
* important part of the code generation. We don't know that the
* name refers to a resource descriptor until now.
*
******************************************************************************/
static ACPI_STATUS
LkNamespaceLocateBegin (
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;
char *Path;
UINT8 PassedArgs;
ACPI_PARSE_OBJECT *NextOp;
ACPI_PARSE_OBJECT *OwningOp;
ACPI_PARSE_OBJECT *SpaceIdOp;
UINT32 MinimumLength;
UINT32 Temp;
const ACPI_OPCODE_INFO *OpInfo;
UINT32 Flags;
ACPI_FUNCTION_TRACE_PTR (LkNamespaceLocateBegin, Op);
/*
* If this node is the actual declaration of a name
* [such as the XXXX name in "Method (XXXX)"],
* we are not interested in it here. We only care about names that are
* references to other objects within the namespace and the parent objects
* of name declarations
*/
if (Op->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)
{
return (AE_OK);
}
/* We are only interested in opcodes that have an associated name */
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
if ((!(OpInfo->Flags & AML_NAMED)) &&
(!(OpInfo->Flags & AML_CREATE)) &&
(Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) &&
(Op->Asl.ParseOpcode != PARSEOP_NAMESEG) &&
(Op->Asl.ParseOpcode != PARSEOP_METHODCALL))
{
return (AE_OK);
}
/*
* One special case: CondRefOf operator - we don't care if the name exists
* or not at this point, just ignore it, the point of the operator is to
* determine if the name exists at runtime.
*/
if ((Op->Asl.Parent) &&
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF))
{
return (AE_OK);
}
/*
* We must enable the "search-to-root" for single NameSegs, but
* we have to be very careful about opening up scopes
*/
Flags = ACPI_NS_SEARCH_PARENT;
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
{
/*
* These are name references, do not push the scope stack
* for them.
*/
Flags |= ACPI_NS_DONT_OPEN_SCOPE;
}
/* Get the NamePath from the appropriate place */
if (OpInfo->Flags & AML_NAMED)
{
/* For nearly all NAMED operators, the name reference is the first child */
Path = Op->Asl.Child->Asl.Value.String;
if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
{
/*
* ALIAS is the only oddball opcode, the name declaration
* (alias name) is the second operand
*/
Path = Op->Asl.Child->Asl.Next->Asl.Value.String;
}
}
else if (OpInfo->Flags & AML_CREATE)
{
/* Name must appear as the last parameter */
NextOp = Op->Asl.Child;
while (!(NextOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION))
{
NextOp = NextOp->Asl.Next;
}
Path = NextOp->Asl.Value.String;
}
else
{
Path = Op->Asl.Value.String;
}
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Type=%s\n", AcpiUtGetTypeName (ObjectType)));
/*
* Lookup the name in the namespace. Name must exist at this point, or it
* is an invalid reference.
*
* The namespace is also used as a lookup table for references to resource
* descriptors and the fields within them.
*/
Gbl_NsLookupCount++;
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/*
* We didn't find the name reference by path -- we can qualify this
* a little better before we print an error message
*/
if (strlen (Path) == ACPI_NAME_SIZE)
{
/* A simple, one-segment ACPI name */
if (LkObjectExists (Path))
{
/*
* There exists such a name, but we couldn't get to it
* from this scope
*/
AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op,
Op->Asl.ExternalName);
}
else
{
/* The name doesn't exist, period */
AslError (ASL_ERROR, ASL_MSG_NOT_EXIST,
Op, Op->Asl.ExternalName);
}
}
else
{
/* Check for a fully qualified path */
if (Path[0] == AML_ROOT_PREFIX)
{
/* Gave full path, the object does not exist */
AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op,
Op->Asl.ExternalName);
}
else
{
/*
* We can't tell whether it doesn't exist or just
* can't be reached.
*/
AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
Op->Asl.ExternalName);
}
}
Status = AE_OK;
}
return (Status);
}
/* Check for a reference vs. name declaration */
if (!(OpInfo->Flags & AML_NAMED) &&
!(OpInfo->Flags & AML_CREATE))
{
/* This node has been referenced, mark it for reference check */
Node->Flags |= ANOBJ_IS_REFERENCED;
}
/* Attempt to optimize the NamePath */
OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node);
/*
* 1) Dereference an alias (A name reference that is an alias)
* Aliases are not nested, the alias always points to the final object
*/
if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) &&
(Node->Type == ACPI_TYPE_LOCAL_ALIAS))
{
/* This node points back to the original PARSEOP_ALIAS */
NextOp = Node->Op;
/* The first child is the alias target op */
NextOp = NextOp->Asl.Child;
/* That in turn points back to original target alias node */
if (NextOp->Asl.Node)
{
Node = NextOp->Asl.Node;
}
/* Else - forward reference to alias, will be resolved later */
}
/* 2) Check for a reference to a resource descriptor */
if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
(Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
{
/*
* This was a reference to a field within a resource descriptor. Extract
* the associated field offset (either a bit or byte offset depending on
* the field type) and change the named reference into an integer for
* AML code generation
*/
Temp = Node->Value;
if (Node->Flags & ANOBJ_IS_BIT_OFFSET)
{
Op->Asl.CompileFlags |= NODE_IS_BIT_OFFSET;
}
/* Perform BitOffset <--> ByteOffset conversion if necessary */
switch (Op->Asl.Parent->Asl.AmlOpcode)
{
case AML_CREATE_FIELD_OP:
/* We allow a Byte offset to Bit Offset conversion for this op */
if (!(Op->Asl.CompileFlags & NODE_IS_BIT_OFFSET))
{
/* Simply multiply byte offset times 8 to get bit offset */
Temp = ACPI_MUL_8 (Temp);
}
break;
case AML_CREATE_BIT_FIELD_OP:
/* This op requires a Bit Offset */
if (!(Op->Asl.CompileFlags & NODE_IS_BIT_OFFSET))
{
AslError (ASL_ERROR, ASL_MSG_BYTES_TO_BITS, Op, NULL);
}
break;
case AML_CREATE_BYTE_FIELD_OP:
case AML_CREATE_WORD_FIELD_OP:
case AML_CREATE_DWORD_FIELD_OP:
case AML_CREATE_QWORD_FIELD_OP:
case AML_INDEX_OP:
/* These Ops require Byte offsets */
if (Op->Asl.CompileFlags & NODE_IS_BIT_OFFSET)
{
AslError (ASL_ERROR, ASL_MSG_BITS_TO_BYTES, Op, NULL);
}
break;
default:
/* Nothing to do for other opcodes */
break;
}
/* Now convert this node to an integer whose value is the field offset */
Op->Asl.AmlLength = 0;
Op->Asl.ParseOpcode = PARSEOP_INTEGER;
Op->Asl.Value.Integer = (UINT64) Temp;
Op->Asl.CompileFlags |= NODE_IS_RESOURCE_FIELD;
OpcGenerateAmlOpcode (Op);
}
/* 3) Check for a method invocation */
else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) &&
(Node->Type == ACPI_TYPE_METHOD) &&
(Op->Asl.Parent) &&
(Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
{
/*
* A reference to a method within one of these opcodes is not an
* invocation of the method, it is simply a reference to the method.
*/
if ((Op->Asl.Parent) &&
((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) ||
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_DEREFOF) ||
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE)))
{
return (AE_OK);
}
/*
* There are two types of method invocation:
* 1) Invocation with arguments -- the parser recognizes this
* as a METHODCALL.
* 2) Invocation with no arguments --the parser cannot determine that
* this is a method invocation, therefore we have to figure it out
* here.
*/
if (Node->Type != ACPI_TYPE_METHOD)
{
sprintf (MsgBuffer, "%s is a %s",
Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer);
return (AE_OK);
}
/* Save the method node in the caller's op */
Op->Asl.Node = Node;
if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)
{
return (AE_OK);
}
/*
* This is a method invocation, with or without arguments.
* Count the number of arguments, each appears as a child
* under the parent node
*/
Op->Asl.ParseOpcode = PARSEOP_METHODCALL;
UtSetParseOpName (Op);
PassedArgs = 0;
NextOp = Op->Asl.Child;
while (NextOp)
{
PassedArgs++;
NextOp = NextOp->Asl.Next;
}
if (Node->Value != ASL_EXTERNAL_METHOD)
{
/*
* Check the parsed arguments with the number expected by the
* method declaration itself
*/
if (PassedArgs != Node->Value)
{
sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName,
Node->Value);
if (PassedArgs < Node->Value)
{
AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer);
}
else
{
AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer);
}
}
}
}
/* 4) Check for an ASL Field definition */
else if ((Op->Asl.Parent) &&
((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) ||
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD)))
{
/*
* Offset checking for fields. If the parent operation region has a
* constant length (known at compile time), we can check fields
* defined in that region against the region length. This will catch
* fields and field units that cannot possibly fit within the region.
*
* Note: Index fields do not directly reference an operation region,
* thus they are not included in this check.
*/
if (Op == Op->Asl.Parent->Asl.Child)
{
/*
* This is the first child of the field node, which is
* the name of the region. Get the parse node for the
* region -- which contains the length of the region.
*/
OwningOp = Node->Op;
Op->Asl.Parent->Asl.ExtraValue =
ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer);
/* Examine the field access width */
switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer)
{
case AML_FIELD_ACCESS_ANY:
case AML_FIELD_ACCESS_BYTE:
case AML_FIELD_ACCESS_BUFFER:
default:
MinimumLength = 1;
break;
case AML_FIELD_ACCESS_WORD:
MinimumLength = 2;
break;
case AML_FIELD_ACCESS_DWORD:
MinimumLength = 4;
break;
case AML_FIELD_ACCESS_QWORD:
MinimumLength = 8;
break;
}
/*
* Is the region at least as big as the access width?
* Note: DataTableRegions have 0 length
*/
if (((UINT32) OwningOp->Asl.Value.Integer) &&
((UINT32) OwningOp->Asl.Value.Integer < MinimumLength))
{
AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL);
}
/*
* Check EC/CMOS/SMBUS fields to make sure that the correct
* access type is used (BYTE for EC/CMOS, BUFFER for SMBUS)
*/
SpaceIdOp = OwningOp->Asl.Child->Asl.Next;
switch ((UINT32) SpaceIdOp->Asl.Value.Integer)
{
case ACPI_ADR_SPACE_EC:
case ACPI_ADR_SPACE_CMOS:
if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BYTE)
{
AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL);
}
break;
case ACPI_ADR_SPACE_SMBUS:
case ACPI_ADR_SPACE_IPMI:
if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BUFFER)
{
AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL);
}
break;
default:
/* Nothing to do for other address spaces */
break;
}
}
else
{
/*
* This is one element of the field list. Check to make sure
* that it does not go beyond the end of the parent operation region.
*
* In the code below:
* Op->Asl.Parent->Asl.ExtraValue - Region Length (bits)
* Op->Asl.ExtraValue - Field start offset (bits)
* Op->Asl.Child->Asl.Value.Integer32 - Field length (bits)
* Op->Asl.Child->Asl.ExtraValue - Field access width (bits)
*/
if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child)
{
LkCheckFieldRange (Op,
Op->Asl.Parent->Asl.ExtraValue,
Op->Asl.ExtraValue,
(UINT32) Op->Asl.Child->Asl.Value.Integer,
Op->Asl.Child->Asl.ExtraValue);
}
}
}
Op->Asl.Node = Node;
return (Status);
}
/*******************************************************************************
*
* FUNCTION: LkNamespaceLocateEnd
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback used during cross reference. We only
* need to worry about scope management here.
*
******************************************************************************/
static ACPI_STATUS
LkNamespaceLocateEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_FUNCTION_TRACE (LkNamespaceLocateEnd);
/* We are only interested in opcodes that have an associated name */
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
if (!(OpInfo->Flags & AML_NAMED))
{
return (AE_OK);
}
/* Not interested in name references, we did not open a scope for them */
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
{
return (AE_OK);
}
/* Pop the scope stack if necessary */
if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode)))
{
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%s: Popping scope for Op %p\n",
AcpiUtGetTypeName (OpInfo->ObjectType), Op));
(void) AcpiDsScopeStackPop (WalkState);
}
return (AE_OK);
}