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Diffstat (limited to 'sys/contrib/dev/acpica/compiler/asllookup.c')
| -rw-r--r-- | sys/contrib/dev/acpica/compiler/asllookup.c | 1370 |
1 files changed, 1370 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/compiler/asllookup.c b/sys/contrib/dev/acpica/compiler/asllookup.c new file mode 100644 index 0000000..a970f12 --- /dev/null +++ b/sys/contrib/dev/acpica/compiler/asllookup.c @@ -0,0 +1,1370 @@ +/****************************************************************************** + * + * Module Name: asllookup- Namespace lookup + * $Revision: 1.103 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, 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. + * + *****************************************************************************/ + + +#include <contrib/dev/acpica/compiler/aslcompiler.h> +#include "aslcompiler.y.h" + +#include <contrib/dev/acpica/acparser.h> +#include <contrib/dev/acpica/amlcode.h> +#include <contrib/dev/acpica/acnamesp.h> +#include <contrib/dev/acpica/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); + + +/******************************************************************************* + * + * 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, "%5d [%d] %*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); +} + + +void +LsSetupNsList (void * Handle) +{ + + Gbl_NsOutputFlag = TRUE; + Gbl_Files[ASL_FILE_NAMESPACE_OUTPUT].Handle = Handle; +} + + +/******************************************************************************* + * + * 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); + 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, + 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 + * + ******************************************************************************/ + +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); +} + + +/******************************************************************************* + * + * 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); + } + + /* + * 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 */ + + if ((Op->Asl.Parent) && + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) + { + /* Ignore not found if parent is CondRefOf */ + + return (AE_OK); + } + + 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 */ + + if ((Op->Asl.Parent) && + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) + { + /* Ignore not found if parent is CondRefOf */ + + return (AE_OK); + } + + 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 %d", 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 REGION_EC: + case REGION_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 REGION_SMBUS: + + 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); +} + + |
