C++ AcpiExStore函数代码示例

static void
AeDoOneOverride (
    char                    *Pathname,
    char                    *ValueString,
    ACPI_OPERAND_OBJECT     *ObjDesc,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_HANDLE             Handle;
    ACPI_STATUS             Status;
    UINT64                  Value;


    AcpiOsPrintf ("Value Override: %s, ", Pathname);

    /*
     * Get the namespace node associated with the override
     * pathname from the init file.
     */
    Status = AcpiGetHandle (NULL, Pathname, &Handle);
    if (ACPI_FAILURE (Status))
    {
        AcpiOsPrintf ("%s\n", AcpiFormatException (Status));
        return;
    }

    /* Extract the 64-bit integer */

    Status = AcpiUtStrtoul64 (ValueString,
        (ACPI_STRTOUL_BASE16 | ACPI_STRTOUL_64BIT), &Value);
    if (ACPI_FAILURE (Status))
    {
        AcpiOsPrintf ("%s %s\n", ValueString,
            AcpiFormatException (Status));
        return;
    }

    ObjDesc->Integer.Value = Value;

    /*
     * At the point this function is called, the namespace is fully
     * built and initialized. We can simply store the new object to
     * the target node.
     */
    AcpiExEnterInterpreter ();
    Status = AcpiExStore (ObjDesc, Handle, WalkState);
    AcpiExExitInterpreter ();

    if (ACPI_FAILURE (Status))
    {
        AcpiOsPrintf ("%s\n", AcpiFormatException (Status));
        return;
    }

    AcpiOsPrintf ("New value: 0x%8.8X%8.8X\n",
        ACPI_FORMAT_UINT64 (Value));
}

//.........这里部分代码省略.........
         * reference operand to an actual integer.
         */
        Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "While resolving operands for [%s]",
                AcpiPsGetOpcodeName (WalkState->Opcode)));

            goto Cleanup;
        }

        /*
         * TempDesc is now guaranteed to be an Integer object --
         * Perform the actual increment or decrement
         */
        if (WalkState->Opcode == AML_INCREMENT_OP)
        {
            ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1;
        }
        else
        {
            ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1;
        }

        /* Finished with this Integer object */

        AcpiUtRemoveReference (TempDesc);

        /*
         * Store the result back (indirectly) through the original
         * Reference object
         */
        Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
        break;

    case AML_OBJECT_TYPE_OP:            /* ObjectType (SourceObject) */
        /*
         * Note: The operand is not resolved at this point because we want to
         * get the associated object, not its value. For example, we don't
         * want to resolve a FieldUnit to its value, we want the actual
         * FieldUnit object.
         */

        /* Get the type of the base object */

        Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
        if (ACPI_FAILURE (Status))
        {
            goto Cleanup;
        }

        /* Allocate a descriptor to hold the type. */

        ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type);
        if (!ReturnDesc)
        {
            Status = AE_NO_MEMORY;
            goto Cleanup;
        }
        break;

    case AML_SIZE_OF_OP:            /* SizeOf (SourceObject)  */
        /*
         * Note: The operand is not resolved at this point because we want to
         * get the associated object, not its value.

//.........这里部分代码省略.........
                ACPI_ERROR ((AE_INFO,
                    "Integer too large to convert to BCD: 0x%8.8X%8.8X",
                    ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value)));
                Status = AE_AML_NUMERIC_OVERFLOW;
                goto Cleanup;
            }
            break;

        case AML_COND_REF_OF_OP:        /* CondRefOf (SourceObject, Result)  */
            /*
             * This op is a little strange because the internal return value is
             * different than the return value stored in the result descriptor
             * (There are really two return values)
             */
            if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
            {
                /*
                 * This means that the object does not exist in the namespace,
                 * return FALSE
                 */
                ReturnDesc->Integer.Value = 0;
                goto Cleanup;
            }

            /* Get the object reference, store it, and remove our reference */

            Status = AcpiExGetObjectReference (Operand[0],
                &ReturnDesc2, WalkState);
            if (ACPI_FAILURE (Status))
            {
                goto Cleanup;
            }

            Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
            AcpiUtRemoveReference (ReturnDesc2);

            /* The object exists in the namespace, return TRUE */

            ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
            goto Cleanup;


        default:

            /* No other opcodes get here */

            break;
        }
        break;

    case AML_STORE_OP:              /* Store (Source, Target) */
        /*
         * A store operand is typically a number, string, buffer or lvalue
         * Be careful about deleting the source object,
         * since the object itself may have been stored.
         */
        Status = AcpiExStore (Operand[0], Operand[1], WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        /* It is possible that the Store already produced a return object */

        if (!WalkState->ResultObj)
        {

//.........这里部分代码省略.........
        {
            Length = 0;
        }

        /* Truncate request if larger than the actual String/Buffer */

        else if ((Index + Length) > Operand[0]->String.Length)
        {
            Length = (ACPI_SIZE) Operand[0]->String.Length -
                        (ACPI_SIZE) Index;
        }

        /* Strings always have a sub-pointer, not so for buffers */

        switch ((Operand[0])->Common.Type)
        {
        case ACPI_TYPE_STRING:

            /* Always allocate a new buffer for the String */

            Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
            if (!Buffer)
            {
                Status = AE_NO_MEMORY;
                goto Cleanup;
            }
            break;

        case ACPI_TYPE_BUFFER:

            /* If the requested length is zero, don't allocate a buffer */

            if (Length > 0)
            {
                /* Allocate a new buffer for the Buffer */

                Buffer = ACPI_ALLOCATE_ZEROED (Length);
                if (!Buffer)
                {
                    Status = AE_NO_MEMORY;
                    goto Cleanup;
                }
            }
            break;

        default:                        /* Should not happen */

            Status = AE_AML_OPERAND_TYPE;
            goto Cleanup;
        }

        if (Buffer)
        {
            /* We have a buffer, copy the portion requested */

            ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
                         Length);
        }

        /* Set the length of the new String/Buffer */

        ReturnDesc->String.Pointer = Buffer;
        ReturnDesc->String.Length = (UINT32) Length;

        /* Mark buffer initialized */

        ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
        break;


    default:

        ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
            WalkState->Opcode));
        Status = AE_AML_BAD_OPCODE;
        goto Cleanup;
    }

    /* Store the result in the target */

    Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);

Cleanup:

    /* Delete return object on error */

    if (ACPI_FAILURE (Status) || WalkState->ResultObj)
    {
        AcpiUtRemoveReference (ReturnDesc);
        WalkState->ResultObj = NULL;
    }

    /* Set the return object and exit */

    else
    {
        WalkState->ResultObj = ReturnDesc;
    }
    return_ACPI_STATUS (Status);
}

//.........这里部分代码省略.........
        /* Table cannot extend beyond the buffer */

        if (Length > ObjDesc->Buffer.Length)
        {
            return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
        }
        if (Length < sizeof (ACPI_TABLE_HEADER))
        {
            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
        }

        /*
         * Copy the table from the buffer because the buffer could be modified
         * or even deleted in the future
         */
        TableDesc.Pointer = ACPI_ALLOCATE (Length);
        if (!TableDesc.Pointer)
        {
            return_ACPI_STATUS (AE_NO_MEMORY);
        }

        ACPI_MEMCPY (TableDesc.Pointer, Table, Length);
        TableDesc.Address = ACPI_TO_INTEGER (TableDesc.Pointer);
        break;


    default:
        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
    }

    /* Validate table checksum (will not get validated in TbAddTable) */

    Status = AcpiTbVerifyChecksum (TableDesc.Pointer, Length);
    if (ACPI_FAILURE (Status))
    {
        ACPI_FREE (TableDesc.Pointer);
        return_ACPI_STATUS (Status);
    }

    /* Complete the table descriptor */

    TableDesc.Length = Length;
    TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED;

    /* Install the new table into the local data structures */

    Status = AcpiTbAddTable (&TableDesc, &TableIndex);
    if (ACPI_FAILURE (Status))
    {
        /* Delete allocated table buffer */

        AcpiTbDeleteTable (&TableDesc);
        return_ACPI_STATUS (Status);
    }

    /*
     * Add the table to the namespace.
     *
     * Note: Load the table objects relative to the root of the namespace.
     * This appears to go against the ACPI specification, but we do it for
     * compatibility with other ACPI implementations.
     */
    Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle);
    if (ACPI_FAILURE (Status))
    {
        /* On error, TablePtr was deallocated above */

        return_ACPI_STATUS (Status);
    }

    /* Store the DdbHandle into the Target operand */

    Status = AcpiExStore (DdbHandle, Target, WalkState);
    if (ACPI_FAILURE (Status))
    {
        (void) AcpiExUnloadTable (DdbHandle);

        /* TablePtr was deallocated above */

        AcpiUtRemoveReference (DdbHandle);
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Dynamic OEM Table Load:"));
    AcpiTbPrintTableHeader (0, TableDesc.Pointer);

    /* Remove the reference by added by AcpiExStore above */

    AcpiUtRemoveReference (DdbHandle);

    /* Invoke table handler if present */

    if (AcpiGbl_TableHandler)
    {
        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, TableDesc.Pointer,
                    AcpiGbl_TableHandlerContext);
    }

    return_ACPI_STATUS (Status);
}

//.........这里部分代码省略.........

        DdbHandle = AcpiUtCreateIntegerObject ((UINT64) 0);
        if (!DdbHandle)
        {
            return_ACPI_STATUS (AE_NO_MEMORY);
        }

        *ReturnDesc = DdbHandle;
        return_ACPI_STATUS (AE_OK);
    }

    /* Default nodes */

    StartNode = WalkState->ScopeInfo->Scope.Node;
    ParentNode = AcpiGbl_RootNode;

    /* RootPath (optional parameter) */

    if (Operand[3]->String.Length > 0)
    {
        /*
         * Find the node referenced by the RootPathString.  This is the
         * location within the namespace where the table will be loaded.
         */
        Status = AcpiNsGetNode (StartNode, Operand[3]->String.Pointer,
                    ACPI_NS_SEARCH_PARENT, &ParentNode);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /* ParameterPath (optional parameter) */

    if (Operand[4]->String.Length > 0)
    {
        if ((Operand[4]->String.Pointer[0] != '\\') &&
            (Operand[4]->String.Pointer[0] != '^'))
        {
            /*
             * Path is not absolute, so it will be relative to the node
             * referenced by the RootPathString (or the NS root if omitted)
             */
            StartNode = ParentNode;
        }

        /* Find the node referenced by the ParameterPathString */

        Status = AcpiNsGetNode (StartNode, Operand[4]->String.Pointer,
                    ACPI_NS_SEARCH_PARENT, &ParameterNode);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /* Load the table into the namespace */

    Status = AcpiExAddTable (TableIndex, ParentNode, &DdbHandle);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Parameter Data (optional) */

    if (ParameterNode)
    {
        /* Store the parameter data into the optional parameter object */

        Status = AcpiExStore (Operand[5],
                    ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode),
                    WalkState);
        if (ACPI_FAILURE (Status))
        {
            (void) AcpiExUnloadTable (DdbHandle);

            AcpiUtRemoveReference (DdbHandle);
            return_ACPI_STATUS (Status);
        }
    }

    Status = AcpiGetTableByIndex (TableIndex, &Table);
    if (ACPI_SUCCESS (Status))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Dynamic OEM Table Load:"));
        AcpiTbPrintTableHeader (0, Table);
    }

    /* Invoke table handler if present */

    if (AcpiGbl_TableHandler)
    {
        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
                    AcpiGbl_TableHandlerContext);
    }

    *ReturnDesc = DdbHandle;
    return_ACPI_STATUS  (Status);
}

//.........这里部分代码省略.........
            ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD;
            break;

        case ACPI_TYPE_BUFFER:

            if (Index >= Operand[0]->Buffer.Length)
            {
                Length = Operand[0]->Buffer.Length;
                Status = AE_AML_BUFFER_LIMIT;
            }

            ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD;
            break;

        case ACPI_TYPE_PACKAGE:

            if (Index >= Operand[0]->Package.Count)
            {
                Length = Operand[0]->Package.Count;
                Status = AE_AML_PACKAGE_LIMIT;
            }

            ReturnDesc->Reference.TargetType = ACPI_TYPE_PACKAGE;
            ReturnDesc->Reference.Where = &Operand[0]->Package.Elements [Index];
            break;

        default:

            Status = AE_AML_INTERNAL;
            goto Cleanup;
        }

        /* Failure means that the Index was beyond the end of the object */

        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
                ACPI_FORMAT_UINT64 (Index), (UINT32) Length));
            goto Cleanup;
        }

        /*
         * Save the target object and add a reference to it for the life
         * of the index
         */
        ReturnDesc->Reference.Object = Operand[0];
        AcpiUtAddReference (Operand[0]);

        /* Store the reference to the Target */

        Status = AcpiExStore (ReturnDesc, Operand[2], WalkState);

        /* Return the reference */

        WalkState->ResultObj = ReturnDesc;
        goto Cleanup;

    default:

        ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
            WalkState->Opcode));
        Status = AE_AML_BAD_OPCODE;
        break;
    }


StoreResultToTarget:

    if (ACPI_SUCCESS (Status))
    {
        /*
         * Store the result of the operation (which is now in ReturnDesc) into
         * the Target descriptor.
         */
        Status = AcpiExStore (ReturnDesc, Operand[2], WalkState);
        if (ACPI_FAILURE (Status))
        {
            goto Cleanup;
        }

        if (!WalkState->ResultObj)
        {
            WalkState->ResultObj = ReturnDesc;
        }
    }


Cleanup:

    /* Delete return object on error */

    if (ACPI_FAILURE (Status))
    {
        AcpiUtRemoveReference (ReturnDesc);
        WalkState->ResultObj = NULL;
    }

    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiExOpcode_2A_2T_1R (
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
    ACPI_OPERAND_OBJECT     *ReturnDesc1 = NULL;
    ACPI_OPERAND_OBJECT     *ReturnDesc2 = NULL;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_2T_1R,
        AcpiPsGetOpcodeName (WalkState->Opcode));


    /* Execute the opcode */

    switch (WalkState->Opcode)
    {
    case AML_DIVIDE_OP:

        /* Divide (Dividend, Divisor, RemainderResult QuotientResult) */

        ReturnDesc1 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
        if (!ReturnDesc1)
        {
            Status = AE_NO_MEMORY;
            goto Cleanup;
        }

        ReturnDesc2 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
        if (!ReturnDesc2)
        {
            Status = AE_NO_MEMORY;
            goto Cleanup;
        }

        /* Quotient to ReturnDesc1, remainder to ReturnDesc2 */

        Status = AcpiUtDivide (Operand[0]->Integer.Value,
                               Operand[1]->Integer.Value,
                               &ReturnDesc1->Integer.Value,
                               &ReturnDesc2->Integer.Value);
        if (ACPI_FAILURE (Status))
        {
            goto Cleanup;
        }
        break;

    default:

        ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
            WalkState->Opcode));
        Status = AE_AML_BAD_OPCODE;
        goto Cleanup;
    }

    /* Store the results to the target reference operands */

    Status = AcpiExStore (ReturnDesc2, Operand[2], WalkState);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    Status = AcpiExStore (ReturnDesc1, Operand[3], WalkState);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

Cleanup:
    /*
     * Since the remainder is not returned indirectly, remove a reference to
     * it. Only the quotient is returned indirectly.
     */
    AcpiUtRemoveReference (ReturnDesc2);

    if (ACPI_FAILURE (Status))
    {
        /* Delete the return object */

        AcpiUtRemoveReference (ReturnDesc1);
    }

    /* Save return object (the remainder) on success */

    else
    {
        WalkState->ResultObj = ReturnDesc1;
    }

    return_ACPI_STATUS (Status);
}