+++ /dev/null
-/******************************************************************************
- *
- * Module Name: dspkginit - Completion of deferred package initialization
- *
- *****************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2017, 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 "acpi.h"
-#include "accommon.h"
-#include "acnamesp.h"
-#include "amlcode.h"
-#include "acdispat.h"
-#include "acinterp.h"
-
-
-#define _COMPONENT ACPI_NAMESPACE
- ACPI_MODULE_NAME ("dspkginit")
-
-
-/* Local prototypes */
-
-static void
-AcpiDsResolvePackageElement (
- ACPI_OPERAND_OBJECT **Element);
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiDsBuildInternalPackageObj
- *
- * PARAMETERS: WalkState - Current walk state
- * Op - Parser object to be translated
- * ElementCount - Number of elements in the package - this is
- * the NumElements argument to Package()
- * ObjDescPtr - Where the ACPI internal object is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: Translate a parser Op package object to the equivalent
- * namespace object
- *
- * NOTE: The number of elements in the package will be always be the NumElements
- * count, regardless of the number of elements in the package list. If
- * NumElements is smaller, only that many package list elements are used.
- * if NumElements is larger, the Package object is padded out with
- * objects of type Uninitialized (as per ACPI spec.)
- *
- * Even though the ASL compilers do not allow NumElements to be smaller
- * than the Package list length (for the fixed length package opcode), some
- * BIOS code modifies the AML on the fly to adjust the NumElements, and
- * this code compensates for that. This also provides compatibility with
- * other AML interpreters.
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiDsBuildInternalPackageObj (
- ACPI_WALK_STATE *WalkState,
- ACPI_PARSE_OBJECT *Op,
- UINT32 ElementCount,
- ACPI_OPERAND_OBJECT **ObjDescPtr)
-{
- ACPI_PARSE_OBJECT *Arg;
- ACPI_PARSE_OBJECT *Parent;
- ACPI_OPERAND_OBJECT *ObjDesc = NULL;
- ACPI_STATUS Status = AE_OK;
- UINT16 ReferenceCount;
- UINT32 Index;
- UINT32 i;
-
-
- ACPI_FUNCTION_TRACE (DsBuildInternalPackageObj);
-
-
- /* Find the parent of a possibly nested package */
-
- Parent = Op->Common.Parent;
- while ((Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
- (Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP))
- {
- Parent = Parent->Common.Parent;
- }
-
- /*
- * If we are evaluating a Named package object of the form:
- * Name (xxxx, Package)
- * the package object already exists, otherwise it must be created.
- */
- ObjDesc = *ObjDescPtr;
- if (!ObjDesc)
- {
- ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
- *ObjDescPtr = ObjDesc;
- if (!ObjDesc)
- {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- ObjDesc->Package.Node = Parent->Common.Node;
- }
-
- if (ObjDesc->Package.Flags & AOPOBJ_DATA_VALID) /* Just in case */
- {
- return_ACPI_STATUS (AE_OK);
- }
-
- /*
- * Allocate the element array (array of pointers to the individual
- * objects) based on the NumElements parameter. Add an extra pointer slot
- * so that the list is always null terminated.
- */
- ObjDesc->Package.Elements = ACPI_ALLOCATE_ZEROED (
- ((ACPI_SIZE) ElementCount + 1) * sizeof (void *));
-
- if (!ObjDesc->Package.Elements)
- {
- AcpiUtDeleteObjectDesc (ObjDesc);
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- ObjDesc->Package.Count = ElementCount;
- Arg = Op->Common.Value.Arg;
- Arg = Arg->Common.Next;
-
- if (Arg)
- {
- ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
- }
-
- /*
- * Initialize the elements of the package, up to the NumElements count.
- * Package is automatically padded with uninitialized (NULL) elements
- * if NumElements is greater than the package list length. Likewise,
- * Package is truncated if NumElements is less than the list length.
- */
- for (i = 0; Arg && (i < ElementCount); i++)
- {
- if (Arg->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
- {
- if (Arg->Common.Node->Type == ACPI_TYPE_METHOD)
- {
- /*
- * A method reference "looks" to the parser to be a method
- * invocation, so we special case it here
- */
- Arg->Common.AmlOpcode = AML_INT_NAMEPATH_OP;
- Status = AcpiDsBuildInternalObject (
- WalkState, Arg, &ObjDesc->Package.Elements[i]);
- }
- else
- {
- /* This package element is already built, just get it */
-
- ObjDesc->Package.Elements[i] =
- ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node);
- }
- }
- else
- {
- Status = AcpiDsBuildInternalObject (
- WalkState, Arg, &ObjDesc->Package.Elements[i]);
- if (Status == AE_NOT_FOUND)
- {
- ACPI_ERROR ((AE_INFO, "%-48s", "****DS namepath not found"));
- }
-
- /*
- * Initialize this package element. This function handles the
- * resolution of named references within the package.
- */
- AcpiDsInitPackageElement (0, ObjDesc->Package.Elements[i],
- NULL, &ObjDesc->Package.Elements[i]);
- }
-
- if (*ObjDescPtr)
- {
- /* Existing package, get existing reference count */
-
- ReferenceCount = (*ObjDescPtr)->Common.ReferenceCount;
- if (ReferenceCount > 1)
- {
- /* Make new element ref count match original ref count */
- /* TBD: Probably need an AcpiUtAddReferences function */
-
- for (Index = 0; Index < ((UINT32) ReferenceCount - 1); Index++)
- {
- AcpiUtAddReference ((ObjDesc->Package.Elements[i]));
- }
- }
- }
-
- Arg = Arg->Common.Next;
- }
-
- /* Check for match between NumElements and actual length of PackageList */
-
- if (Arg)
- {
- /*
- * NumElements was exhausted, but there are remaining elements in
- * the PackageList. Truncate the package to NumElements.
- *
- * Note: technically, this is an error, from ACPI spec: "It is an
- * error for NumElements to be less than the number of elements in
- * the PackageList". However, we just print a message and no
- * exception is returned. This provides compatibility with other
- * ACPI implementations. Some firmware implementations will alter
- * the NumElements on the fly, possibly creating this type of
- * ill-formed package object.
- */
- while (Arg)
- {
- /*
- * We must delete any package elements that were created earlier
- * and are not going to be used because of the package truncation.
- */
- if (Arg->Common.Node)
- {
- AcpiUtRemoveReference (
- ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node));
- Arg->Common.Node = NULL;
- }
-
- /* Find out how many elements there really are */
-
- i++;
- Arg = Arg->Common.Next;
- }
-
- ACPI_INFO ((
- "Actual Package length (%u) is larger than "
- "NumElements field (%u), truncated",
- i, ElementCount));
- }
- else if (i < ElementCount)
- {
- /*
- * Arg list (elements) was exhausted, but we did not reach
- * NumElements count.
- *
- * Note: this is not an error, the package is padded out
- * with NULLs.
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Package List length (%u) smaller than NumElements "
- "count (%u), padded with null elements\n",
- i, ElementCount));
- }
-
- ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
- Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);
- return_ACPI_STATUS (Status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiDsInitPackageElement
- *
- * PARAMETERS: ACPI_PKG_CALLBACK
- *
- * RETURN: Status
- *
- * DESCRIPTION: Resolve a named reference element within a package object
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiDsInitPackageElement (
- UINT8 ObjectType,
- ACPI_OPERAND_OBJECT *SourceObject,
- ACPI_GENERIC_STATE *State,
- void *Context)
-{
- ACPI_OPERAND_OBJECT **ElementPtr;
-
-
- if (!SourceObject)
- {
- return (AE_OK);
- }
-
- /*
- * The following code is a bit of a hack to workaround a (current)
- * limitation of the ACPI_PKG_CALLBACK interface. We need a pointer
- * to the location within the element array because a new object
- * may be created and stored there.
- */
- if (Context)
- {
- /* A direct call was made to this function */
-
- ElementPtr = (ACPI_OPERAND_OBJECT **) Context;
- }
- else
- {
- /* Call came from AcpiUtWalkPackageTree */
-
- ElementPtr = State->Pkg.ThisTargetObj;
- }
-
- /* We are only interested in reference objects/elements */
-
- if (SourceObject->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
- {
- /* Attempt to resolve the (named) reference to a namespace node */
-
- AcpiDsResolvePackageElement (ElementPtr);
- }
- else if (SourceObject->Common.Type == ACPI_TYPE_PACKAGE)
- {
- SourceObject->Package.Flags |= AOPOBJ_DATA_VALID;
- }
-
- return (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiDsResolvePackageElement
- *
- * PARAMETERS: ElementPtr - Pointer to a reference object
- *
- * RETURN: Possible new element is stored to the indirect ElementPtr
- *
- * DESCRIPTION: Resolve a package element that is a reference to a named
- * object.
- *
- ******************************************************************************/
-
-static void
-AcpiDsResolvePackageElement (
- ACPI_OPERAND_OBJECT **ElementPtr)
-{
- ACPI_STATUS Status;
- ACPI_GENERIC_STATE ScopeInfo;
- ACPI_OPERAND_OBJECT *Element = *ElementPtr;
- ACPI_NAMESPACE_NODE *ResolvedNode;
- char *ExternalPath = NULL;
- ACPI_OBJECT_TYPE Type;
-
-
- ACPI_FUNCTION_TRACE (DsResolvePackageElement);
-
-
- /* Check if reference element is already resolved */
-
- if (Element->Reference.Resolved)
- {
- return_VOID;
- }
-
- /* Element must be a reference object of correct type */
-
- ScopeInfo.Scope.Node = Element->Reference.Node; /* Prefix node */
-
- Status = AcpiNsLookup (&ScopeInfo,
- (char *) Element->Reference.Aml, /* Pointer to AML path */
- ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
- ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
- NULL, &ResolvedNode);
- if (ACPI_FAILURE (Status))
- {
- Status = AcpiNsExternalizeName (ACPI_UINT32_MAX,
- (char *) Element->Reference.Aml,
- NULL, &ExternalPath);
-
- ACPI_EXCEPTION ((AE_INFO, Status,
- "Could not find/resolve named package element: %s", ExternalPath));
-
- ACPI_FREE (ExternalPath);
- *ElementPtr = NULL;
- return_VOID;
- }
- else if (ResolvedNode->Type == ACPI_TYPE_ANY)
- {
- /* Named reference not resolved, return a NULL package element */
-
- ACPI_ERROR ((AE_INFO,
- "Could not resolve named package element [%4.4s] in [%4.4s]",
- ResolvedNode->Name.Ascii, ScopeInfo.Scope.Node->Name.Ascii));
- *ElementPtr = NULL;
- return_VOID;
- }
-#if 0
- else if (ResolvedNode->Flags & ANOBJ_TEMPORARY)
- {
- /*
- * A temporary node found here indicates that the reference is
- * to a node that was created within this method. We are not
- * going to allow it (especially if the package is returned
- * from the method) -- the temporary node will be deleted out
- * from under the method. (05/2017).
- */
- ACPI_ERROR ((AE_INFO,
- "Package element refers to a temporary name [%4.4s], "
- "inserting a NULL element",
- ResolvedNode->Name.Ascii));
- *ElementPtr = NULL;
- return_VOID;
- }
-#endif
-
- /*
- * Special handling for Alias objects. We need ResolvedNode to point
- * to the Alias target. This effectively "resolves" the alias.
- */
- if (ResolvedNode->Type == ACPI_TYPE_LOCAL_ALIAS)
- {
- ResolvedNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
- ResolvedNode->Object);
- }
-
- /* Update the reference object */
-
- Element->Reference.Resolved = TRUE;
- Element->Reference.Node = ResolvedNode;
- Type = Element->Reference.Node->Type;
-
- /*
- * 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.
- */
- Status = AcpiExResolveNodeToValue (&ResolvedNode, NULL);
- if (ACPI_FAILURE (Status))
- {
- return_VOID;
- }
-
-#if 0
-/* TBD - alias support */
- /*
- * 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);
- }
-#endif
-
- switch (Type)
- {
- /*
- * These object types are a result of named references, so we will
- * leave them as reference objects. In other words, these types
- * have no intrinsic "value".
- */
- case ACPI_TYPE_DEVICE:
- case ACPI_TYPE_THERMAL:
-
- /* TBD: This may not be necesssary */
-
- AcpiUtAddReference (ResolvedNode->Object);
- break;
-
- case ACPI_TYPE_MUTEX:
- case ACPI_TYPE_METHOD:
- case ACPI_TYPE_POWER:
- case ACPI_TYPE_PROCESSOR:
- case ACPI_TYPE_EVENT:
- case ACPI_TYPE_REGION:
-
- break;
-
- default:
- /*
- * For all other types - the node was resolved to an actual
- * operand object with a value, return the object
- */
- *ElementPtr = (ACPI_OPERAND_OBJECT *) ResolvedNode;
- break;
- }
-
- return_VOID;
-}
projects / reactos.git / blobdiff