dmrestag.c

acpi tools for linux include acpiexec and acpixtract

    AcpiNsInternalizeName (Pathname, &InternalPath);
    ACPI_FREE (Pathname);
    return (InternalPath);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmUpdateResourceName
 *
 * PARAMETERS:  ResourceNode        - Node for a resource descriptor
 *
 * RETURN:      Stores new name in the ResourceNode
 *
 * DESCRIPTION: Create a new, unique name for a resource descriptor. Used by
 *              both the disassembly of the descriptor itself and any symbolic
 *              references to the descriptor. Ignored if a unique name has
 *              already been assigned to the resource.
 *
 * NOTE: Single threaded, suitable for applications only!
 *
 ******************************************************************************/

static void
AcpiDmUpdateResourceName (
    ACPI_NAMESPACE_NODE     *ResourceNode)
{
    char                    Name[ACPI_NAME_SIZE];


    /* Ignore if a unique name has already been assigned */

    if (ResourceNode->Name.Integer != ACPI_DEFAULT_RESNAME)
    {
        return;
    }

    /* Generate a new ACPI name for the descriptor */

    Name[0] = '_';
    Name[1] = AcpiGbl_Prefix[AcpiGbl_NextPrefix];
    Name[2] = AcpiUtHexToAsciiChar (AcpiGbl_NextResourceId, 4);
    Name[3] = AcpiUtHexToAsciiChar (AcpiGbl_NextResourceId, 0);

    /* Update globals for next name */

    AcpiGbl_NextResourceId++;
    if (AcpiGbl_NextResourceId >= 256)
    {
        AcpiGbl_NextResourceId = 0;
        AcpiGbl_NextPrefix++;
        if (AcpiGbl_NextPrefix > ACPI_NUM_RES_PREFIX)
        {
            AcpiGbl_NextPrefix = 0;
        }
    }

    /* Change the resource descriptor name */

    ResourceNode->Name.Integer = *(UINT32 *) Name;
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmGetResourceTag
 *
 * PARAMETERS:  BitIndex            - Index into the resource descriptor
 *              Resource            - Pointer to the raw resource data
 *              ResourceIndex       - Index correspoinding to the resource type
 *
 * RETURN:      Pointer to the resource tag (ACPI_NAME). NULL if no match.
 *
 * DESCRIPTION: Convert a BitIndex into a symbolic resource tag.
 *
 ******************************************************************************/

static char *
AcpiDmGetResourceTag (
    UINT32                  BitIndex,
    AML_RESOURCE            *Resource,
    UINT8                   ResourceIndex)
{
    ACPI_RESOURCE_TAG       *TagList;
    char                    *Tag = NULL;


    /* Get the tag list for this resource descriptor type */

    TagList = AcpiGbl_ResourceTags[ResourceIndex];
    if (!TagList)
    {
        /* There are no tags for this resource type */

        return (NULL);
    }

    /*
     * Handle the type-specific flags field for the address descriptors.
     * Kindof brute force, but just blindly search for an index match.
     */
    switch (Resource->DescriptorType)
    {
    case ACPI_RESOURCE_NAME_ADDRESS16:
    case ACPI_RESOURCE_NAME_ADDRESS32:
    case ACPI_RESOURCE_NAME_ADDRESS64:
    case ACPI_RESOURCE_NAME_EXTENDED_ADDRESS64:

        if (Resource->Address.ResourceType == ACPI_ADDRESS_TYPE_MEMORY_RANGE)
        {
            Tag = AcpiDmSearchTagList (BitIndex, AcpiDmMemoryFlagTags);
        }
        else if (Resource->Address.ResourceType == ACPI_ADDRESS_TYPE_IO_RANGE)
        {
            Tag = AcpiDmSearchTagList (BitIndex, AcpiDmIoFlagTags);
        }

        /* If we found a match, all done. Else, drop to normal search below */

        if (Tag)
        {
            return (Tag);
        }
        break;

    default:
        break;
    }

    /* Search the tag list for this descriptor type */

    Tag = AcpiDmSearchTagList (BitIndex, TagList);
    return (Tag);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmSearchTagList
 *
 * PARAMETERS:  BitIndex            - Index into the resource descriptor
 *              TagList             - List to search
 *
 * RETURN:      Pointer to a tag (ACPI_NAME). NULL if no match found.
 *
 * DESCRIPTION: Search a tag list for a match to the input BitIndex. Matches
 *              a fixed offset to a symbolic resource tag name.
 *
 ******************************************************************************/

static char *
AcpiDmSearchTagList (
    UINT32                  BitIndex,
    ACPI_RESOURCE_TAG       *TagList)
{

    /*
     * Walk the null-terminated tag list to find a matching bit offset.
     * We are looking for an exact match.
     */
    for ( ; TagList->Tag; TagList++)
    {
        if (BitIndex == TagList->BitIndex)
        {
            return (TagList->Tag);
        }
    }

    /* A matching offset was not found */

    return (NULL);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmFindResources
 *
 * PARAMETERS:  Root                - Root of the parse tree
 *
 * RETURN:      None
 *
 * DESCRIPTION: Add all ResourceTemplate declarations to the namespace. Each
 *              resource descriptor in each template is given a node -- used
 *              for later conversion of resource references to symbolic refs.
 *
 ******************************************************************************/

void
AcpiDmFindResources (
    ACPI_PARSE_OBJECT       *Root)
{
    ACPI_PARSE_OBJECT       *Op = Root;
    ACPI_PARSE_OBJECT       *Parent;


    /* Walk the entire parse tree */

    while (Op)
    {
        /* We are interested in Buffer() declarations */

        if (Op->Common.AmlOpcode == AML_BUFFER_OP)
        {
            /* And only declarations of the form Name (XXXX, Buffer()... ) */

            Parent = Op->Common.Parent;
            if (Parent->Common.AmlOpcode == AML_NAME_OP)
            {
                /*
                 * If the buffer is a resource template, add the individual
                 * resource descriptors to the namespace, as children of the
                 * buffer node.
                 */
                if (ACPI_SUCCESS (AcpiDmIsResourceTemplate (Op)))
                {
                    Op->Common.DisasmOpcode = ACPI_DASM_RESOURCE;
                    AcpiDmAddResourcesToNamespace (Parent->Common.Node, Op);
                }
            }
        }

        Op = AcpiPsGetDepthNext (Root, Op);
    }
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmAddResourcesToNamespace
 *
 * PARAMETERS:  BufferNode          - Node for the parent buffer
 *              Op                  - Parse op for the buffer
 *
 * RETURN:      None
 *
 * DESCRIPTION: Add an entire resource template to the namespace. Each
 *              resource descriptor is added as a namespace node.
 *
 ******************************************************************************/

static void
AcpiDmAddResourcesToNamespace (
    ACPI_NAMESPACE_NODE     *BufferNode,
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *NextOp;


    /* Get to the ByteData list */

    NextOp = Op->Common.Value.Arg;
    NextOp = NextOp->Common.Next;
    if (!NextOp)
    {
        return;
    }

    /* Set Node and Op to point to each other */

    BufferNode->Op = Op;
    Op->Common.Node = BufferNode;

    /*
     * Insert each resource into the namespace
     * NextOp contains the Aml pointer and the Aml length
     */
    AcpiUtWalkAmlResources ((UINT8 *) NextOp->Named.Data,
        (ACPI_SIZE) NextOp->Common.Value.Integer,
        AcpiDmAddResourceToNamespace, BufferNode);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmAddResourceToNamespace
 *
 * PARAMETERS:  ACPI_WALK_AML_CALLBACK
 *              BufferNode              - Node for the parent buffer
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Add one resource descriptor to the namespace as a child of the
 *              parent buffer. The same name is used for each descriptor. This
 *              is changed later to a unique name if the resource is actually
 *              referenced by an AML operator.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiDmAddResourceToNamespace (
    UINT8                   *Aml,
    UINT32                  Length,
    UINT32                  Offset,
    UINT8                   ResourceIndex,
    void                    *Context)
{
    ACPI_STATUS             Status;
    ACPI_GENERIC_STATE      ScopeInfo;
    ACPI_NAMESPACE_NODE     *Node;


    /* TBD: Don't need to add descriptors that have no tags defined? */

    /* Add the resource to the namespace, as child of the buffer */

    ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Context);
    Status = AcpiNsLookup (&ScopeInfo, "_TMP", ACPI_TYPE_LOCAL_RESOURCE,
                ACPI_IMODE_LOAD_PASS2,
                ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_PREFIX_IS_SCOPE,
                NULL, &Node);
    if (ACPI_FAILURE (Status))
    {
        return (AE_OK);
    }

    /* Set the name to the default, changed later if resource is referenced */

    Node->Name.Integer = ACPI_DEFAULT_RESNAME;

    /* Save the offset of the descriptor (within the original buffer) */

    Node->Value = Offset;
    Node->Length = Length;
    return (AE_OK);
}