diff options
Diffstat (limited to 'usr/src/cmd/acpi/iasl/aslload.c')
| -rw-r--r-- | usr/src/cmd/acpi/iasl/aslload.c | 982 |
1 files changed, 982 insertions, 0 deletions
diff --git a/usr/src/cmd/acpi/iasl/aslload.c b/usr/src/cmd/acpi/iasl/aslload.c new file mode 100644 index 0000000000..99ec1bfe06 --- /dev/null +++ b/usr/src/cmd/acpi/iasl/aslload.c @@ -0,0 +1,982 @@ +/****************************************************************************** + * + * Module Name: dswload - Dispatcher namespace load callbacks + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2016, 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 "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; + + + /* 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); + ACPI_FREE (WalkState); + 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: + case AML_INT_CONNECTION_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 and length in the namespace node + * so it can be used when the field is referenced + */ + Node->Value = InitializerOp->Asl.Value.Tag.BitOffset; + Node->Length = InitializerOp->Asl.Value.Tag.BitLength; + InitializerOp->Asl.Node = Node; + Node->Op = InitializerOp; + } + + 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_PARSE_OBJECT *MethodOp; + 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); + + case AML_INT_CONNECTION_OP: + + + if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP) + { + break; + } + Arg = Op->Asl.Child; + + Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, + WalkState, &Node); + if (ACPI_FAILURE (Status)) + { + break; + } + + if (Node->Type == ACPI_TYPE_BUFFER) + { + Arg->Asl.Node = Node; + + Arg = Node->Op->Asl.Child; /* Get namepath */ + Arg = Arg->Asl.Next; /* Get actual buffer */ + Arg = Arg->Asl.Child; /* Buffer length */ + Arg = Arg->Asl.Next; /* RAW_DATA buffer */ + } + break; + + 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)); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* + * 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); + } + else /* Status AE_OK */ + { + /* + * Do not allow references to external scopes from the DSDT. + * This is because the DSDT is always loaded first, and the + * external reference cannot be resolved -- causing a runtime + * error because Scope() must be resolved immediately. + * 10/2015. + */ + if ((Node->Flags & ANOBJ_IS_EXTERNAL) && + (ACPI_COMPARE_NAME (Gbl_TableSignature, "DSDT"))) + { + /* However, allowed if the reference is within a method */ + + MethodOp = Op->Asl.Parent; + while (MethodOp && + (MethodOp->Asl.ParseOpcode != PARSEOP_METHOD)) + { + MethodOp = MethodOp->Asl.Parent; + } + + if (!MethodOp) + { + /* Not in a control method, error */ + + AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL); + } + } + } + + /* 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 if (!(Node->Flags & ANOBJ_IS_EXTERNAL) && + (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) + { + /* + * Allow externals in same scope as the definition of the + * actual object. Similar to C. Allows multiple definition + * blocks that refer to each other in the same file. + */ + Status = AE_OK; + } + else if ((Node->Flags & ANOBJ_IS_EXTERNAL) && + (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) && + (ObjectType == ACPI_TYPE_ANY)) + { + /* Allow update of externals of unknown type. */ + + if (AcpiNsOpensScope (ActualObjectType)) + { + Node->Type = (UINT8) ActualObjectType; + Status = AE_OK; + } + else + { + sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName, + AcpiUtGetTypeName (Node->Type)); + AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer); + return_ACPI_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); +} |