dswload.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"

Include dependency graph for dswload.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_DISPATCHER

Functions
ACPI_STATUS	AcpiDsInitCallbacks (ACPI_WALK_STATE *WalkState, UINT32 PassNumber)
ACPI_STATUS	AcpiDsLoad1BeginOp (ACPI_WALK_STATE *WalkState, ACPI_PARSE_OBJECT **OutOp)
ACPI_STATUS	AcpiDsLoad1EndOp (ACPI_WALK_STATE *WalkState)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_DISPATCHER

Definition at line 55 of file dswload.c.

Function Documentation

AcpiDsInitCallbacks()

ACPI_STATUS AcpiDsInitCallbacks	(	ACPI_WALK_STATE *	WalkState,
		UINT32	PassNumber
	)

Definition at line 73 of file dswload.c.

{

    switch (PassNumber)
    {
    case 0:

        /* Parse only - caller will setup callbacks */

        WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
                                        ACPI_PARSE_DELETE_TREE |
                                        ACPI_PARSE_DISASSEMBLE;
        WalkState->DescendingCallback = NULL;
        WalkState->AscendingCallback  = NULL;
        break;

    case 1:

        /* Load pass 1 */

        WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
                                        ACPI_PARSE_DELETE_TREE;
        WalkState->DescendingCallback = AcpiDsLoad1BeginOp;
        WalkState->AscendingCallback  = AcpiDsLoad1EndOp;
        break;

    case 2:

        /* Load pass 2 */

        WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
                                        ACPI_PARSE_DELETE_TREE;
        WalkState->DescendingCallback = AcpiDsLoad2BeginOp;
        WalkState->AscendingCallback  = AcpiDsLoad2EndOp;
        break;

    case 3:

        /* Execution pass */

        WalkState->ParseFlags        |= ACPI_PARSE_EXECUTE  |
                                        ACPI_PARSE_DELETE_TREE;
        WalkState->DescendingCallback = AcpiDsExecBeginOp;
        WalkState->AscendingCallback  = AcpiDsExecEndOp;
        break;

    default:

        return (AE_BAD_PARAMETER);
    }

    return (AE_OK);
}

Referenced by AcpiDsInitAmlWalk().

AcpiDsLoad1BeginOp()

ACPI_STATUS AcpiDsLoad1BeginOp	(	ACPI_WALK_STATE *	WalkState,
		ACPI_PARSE_OBJECT **	OutOp
	)

Definition at line 144 of file dswload.c.

{
    ACPI_PARSE_OBJECT       *Op;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_STATUS             Status;
    ACPI_OBJECT_TYPE        ObjectType;
    char                    *Path;
    UINT32                  Flags;


    ACPI_FUNCTION_TRACE_PTR (DsLoad1BeginOp, WalkState->Op);


    Op = WalkState->Op;
    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));

    /* We are only interested in opcodes that have an associated name */

    if (Op)
    {
        if (!(WalkState->OpInfo->Flags & AML_NAMED))
        {
            *OutOp = Op;
            return_ACPI_STATUS (AE_OK);
        }

        /* Check if this object has already been installed in the namespace */

        if (Op->Common.Node)
        {
            *OutOp = Op;
            return_ACPI_STATUS (AE_OK);
        }
    }

    Path = AcpiPsGetNextNamestring (&WalkState->ParserState);

    /* Map the raw opcode into an internal object type */

    ObjectType = WalkState->OpInfo->ObjectType;

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "State=%p Op=%p [%s]\n", WalkState, Op,
        AcpiUtGetTypeName (ObjectType)));

    switch (WalkState->Opcode)
    {
    case AML_SCOPE_OP:
        /*
         * The target name of the Scope() operator must exist at this point so
         * that we can actually open the scope to enter new names underneath it.
         * Allow search-to-root for single namesegs.
         */
        Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
            ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &(Node));
#ifdef ACPI_ASL_COMPILER
        if (Status == AE_NOT_FOUND)
        {
            /*
             * Table disassembly:
             * Target of Scope() not found. Generate an External for it, and
             * insert the name into the namespace.
             */
            AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_DEVICE, 0, 0);
            Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
               ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
               WalkState, &Node);
        }
#endif
        if (ACPI_FAILURE (Status))
        {
            ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, Path, Status);
            return_ACPI_STATUS (Status);
        }

        /*
         * Check to make sure that the target is
         * one of the opcodes that actually opens a scope
         */
        switch (Node->Type)
        {
        case ACPI_TYPE_ANY:
        case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
        case ACPI_TYPE_DEVICE:
        case ACPI_TYPE_POWER:
        case ACPI_TYPE_PROCESSOR:
        case ACPI_TYPE_THERMAL:

            /* These are acceptable types */
            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) { ... }
             *
             * Note: silently change the type here. On the second pass,
             * we will report a warning
             */
            ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                "Type override - [%4.4s] had invalid type (%s) "
                "for Scope operator, changed to type ANY\n",
                AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));

            Node->Type = ACPI_TYPE_ANY;
            WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
            break;

        case ACPI_TYPE_METHOD:
            /*
             * Allow scope change to root during execution of module-level
             * code. Root is typed METHOD during this time.
             */
            if ((Node == AcpiGbl_RootNode) &&
                (WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
            {
                break;
            }

            ACPI_FALLTHROUGH;

        default:

            /* All other types are an error */

            ACPI_ERROR ((AE_INFO,
                "Invalid type (%s) for target of "
                "Scope operator [%4.4s] (Cannot override)",
                AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
        break;

    default:
        /*
         * For all other named opcodes, we will enter the name into
         * the namespace.
         *
         * Setup the search flags.
         * Since we are entering a name into the namespace, we do not want to
         * enable the search-to-root upsearch.
         *
         * There are only two conditions where it is acceptable that the name
         * already exists:
         *    1) the Scope() operator can reopen a scoping object that was
         *       previously defined (Scope, Method, Device, etc.)
         *    2) Whenever we are parsing a deferred opcode (OpRegion, Buffer,
         *       BufferField, or Package), the name of the object is already
         *       in the namespace.
         */
        if (WalkState->DeferredNode)
        {
            /* This name is already in the namespace, get the node */

            Node = WalkState->DeferredNode;
            Status = AE_OK;
            break;
        }

        /*
         * If we are executing a method, do not create any namespace objects
         * during the load phase, only during execution.
         */
        if (WalkState->MethodNode)
        {
            Node = NULL;
            Status = AE_OK;
            break;
        }

        Flags = ACPI_NS_NO_UPSEARCH;
        if ((WalkState->Opcode != AML_SCOPE_OP) &&
            (!(WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)))
        {
            if (WalkState->NamespaceOverride)
            {
                Flags |= ACPI_NS_OVERRIDE_IF_FOUND;
                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Override allowed\n",
                    AcpiUtGetTypeName (ObjectType)));
            }
            else
            {
                Flags |= ACPI_NS_ERROR_IF_FOUND;
                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
                    AcpiUtGetTypeName (ObjectType)));
            }
        }
        else
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                "[%s] Both Find or Create allowed\n",
                AcpiUtGetTypeName (ObjectType)));
        }

        /*
         * 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->Flags & ANOBJ_IS_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;
                }
            }

            if (ACPI_FAILURE (Status))
            {
                ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, Path, Status);
                return_ACPI_STATUS (Status);
            }
        }
        break;
    }

    /* Common exit */

    if (!Op)
    {
        /* Create a new op */

        Op = AcpiPsAllocOp (WalkState->Opcode, WalkState->Aml);
        if (!Op)
        {
            return_ACPI_STATUS (AE_NO_MEMORY);
        }
    }

    /* Initialize the op */

#ifdef ACPI_CONSTANT_EVAL_ONLY
    Op->Named.Path = Path;
#endif

    if (Node)
    {
        /*
         * Put the Node in the "op" object that the parser uses, so we
         * can get it again quickly when this scope is closed
         */
        Op->Common.Node = Node;
        Op->Named.Name = Node->Name.Integer;
    }

    AcpiPsAppendArg (AcpiPsGetParentScope (&WalkState->ParserState), Op);
    *OutOp = Op;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiDsInitCallbacks().

AcpiDsLoad1EndOp()

ACPI_STATUS AcpiDsLoad1EndOp

(

ACPI_WALK_STATE *

WalkState

)

Definition at line 443 of file dswload.c.

{
    ACPI_PARSE_OBJECT       *Op;
    ACPI_OBJECT_TYPE        ObjectType;
    ACPI_STATUS             Status = AE_OK;
#ifdef ACPI_ASL_COMPILER
    UINT8                   ParamCount;
#endif


    ACPI_FUNCTION_TRACE (DsLoad1EndOp);


    Op = WalkState->Op;
    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));

    /*
     * Disassembler: handle create field operators here.
     *
     * CreateBufferField is a deferred op that is typically processed in load
     * pass 2. However, disassembly of control method contents walk the parse
     * tree with ACPI_PARSE_LOAD_PASS1 and AML_CREATE operators are processed
     * in a later walk. This is a problem when there is a control method that
     * has the same name as the AML_CREATE object. In this case, any use of the
     * name segment will be detected as a method call rather than a reference
     * to a buffer field.
     *
     * This earlier creation during disassembly solves this issue by inserting
     * the named object in the ACPI namespace so that references to this name
     * would be a name string rather than a method call.
     */
    if ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) &&
        (WalkState->OpInfo->Flags & AML_CREATE))
    {
        Status = AcpiDsCreateBufferField (Op, WalkState);
        return_ACPI_STATUS (Status);
    }

    /* We are only interested in opcodes that have an associated name */

    if (!(WalkState->OpInfo->Flags & (AML_NAMED | AML_FIELD)))
    {
        return_ACPI_STATUS (AE_OK);
    }

    /* Get the object type to determine if we should pop the scope */

    ObjectType = WalkState->OpInfo->ObjectType;

    if (WalkState->OpInfo->Flags & AML_FIELD)
    {
        /*
         * If we are executing a method, do not create any namespace objects
         * during the load phase, only during execution.
         */
        if (!WalkState->MethodNode)
        {
            if (WalkState->Opcode == AML_FIELD_OP          ||
                WalkState->Opcode == AML_BANK_FIELD_OP     ||
                WalkState->Opcode == AML_INDEX_FIELD_OP)
            {
                Status = AcpiDsInitFieldObjects (Op, WalkState);
            }
        }
        return_ACPI_STATUS (Status);
    }

    /*
     * If we are executing a method, do not create any namespace objects
     * during the load phase, only during execution.
     */
    if (!WalkState->MethodNode)
    {
        if (Op->Common.AmlOpcode == AML_REGION_OP)
        {
            Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
                (ACPI_ADR_SPACE_TYPE)
                    ((Op->Common.Value.Arg)->Common.Value.Integer),
                WalkState);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }
        }
        else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
        {
            Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
                ACPI_ADR_SPACE_DATA_TABLE, WalkState);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }
        }
    }

    if (Op->Common.AmlOpcode == AML_NAME_OP)
    {
        /* For Name opcode, get the object type from the argument */

        if (Op->Common.Value.Arg)
        {
            ObjectType = (AcpiPsGetOpcodeInfo (
                (Op->Common.Value.Arg)->Common.AmlOpcode))->ObjectType;

            /* Set node type if we have a namespace node */

            if (Op->Common.Node)
            {
                Op->Common.Node->Type = (UINT8) ObjectType;
            }
        }
    }

#ifdef ACPI_ASL_COMPILER
    /*
     * For external opcode, get the object type from the argument and
     * get the parameter count from the argument's next.
     */
    if (AcpiGbl_DisasmFlag &&
        Op->Common.Node &&
        Op->Common.AmlOpcode == AML_EXTERNAL_OP)
    {
        /*
         * Note, if this external is not a method
         * Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
         * Therefore, ParamCount will be 0.
         */
        ParamCount = (UINT8) Op->Common.Value.Arg->Common.Next->Common.Value.Integer;
        ObjectType = (UINT8) Op->Common.Value.Arg->Common.Value.Integer;
        Op->Common.Node->Flags |= ANOBJ_IS_EXTERNAL;
        Op->Common.Node->Type = (UINT8) ObjectType;

        AcpiDmCreateSubobjectForExternal ((UINT8)ObjectType,
            &Op->Common.Node, ParamCount);

        /*
         * Add the external to the external list because we may be
         * emitting code based off of the items within the external list.
         */
        AcpiDmAddOpToExternalList (Op, Op->Named.Path, (UINT8)ObjectType, ParamCount,
           ACPI_EXT_ORIGIN_FROM_OPCODE | ACPI_EXT_RESOLVED_REFERENCE);
    }
#endif

    /*
     * If we are executing a method, do not create any namespace objects
     * during the load phase, only during execution.
     */
    if (!WalkState->MethodNode)
    {
        if (Op->Common.AmlOpcode == AML_METHOD_OP)
        {
            /*
             * MethodOp PkgLength NameString MethodFlags TermList
             *
             * Note: We must create the method node/object pair as soon as we
             * see the method declaration. This allows later pass1 parsing
             * of invocations of the method (need to know the number of
             * arguments.)
             */
            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
                WalkState, Op, Op->Named.Node));

            if (!AcpiNsGetAttachedObject (Op->Named.Node))
            {
                WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
                WalkState->NumOperands = 1;

                Status = AcpiDsCreateOperands (
                    WalkState, Op->Common.Value.Arg);
                if (ACPI_SUCCESS (Status))
                {
                    Status = AcpiExCreateMethod (Op->Named.Data,
                        Op->Named.Length, WalkState);
                }

                WalkState->Operands[0] = NULL;
                WalkState->NumOperands = 0;

                if (ACPI_FAILURE (Status))
                {
                    return_ACPI_STATUS (Status);
                }
            }
        }
    }

    /* Pop the scope stack (only if loading a table) */

    if (!WalkState->MethodNode &&
        Op->Common.AmlOpcode != AML_EXTERNAL_OP &&
        AcpiNsOpensScope (ObjectType))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
            AcpiUtGetTypeName (ObjectType), Op));

        Status = AcpiDsScopeStackPop (WalkState);
    }

    return_ACPI_STATUS (Status);
}

Referenced by AcpiDsInitCallbacks().