binman: Plumb expanded entries through fully

Add support for this feature in the control, image and section modules, so
that expanded entries will be selected by default. So far there are no
expanded entry types, so this is a nop.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/control.py

@@ -28,7 +28,7 @@ images = OrderedDict()
 #    value: Text for the help
 missing_blob_help = {}
 
-def _ReadImageDesc(binman_node):
+def _ReadImageDesc(binman_node, use_expanded):
     """Read the image descriptions from the /binman node
 
     This normally produces a single Image object called 'image'. But if
@@ -36,15 +36,17 @@ def _ReadImageDesc(binman_node):
 
     Args:
         binman_node: Node object of the /binman node
+        use_expanded: True if the FDT will be updated with the entry information
     Returns:
         OrderedDict of Image objects, each of which describes an image
     """
     images = OrderedDict()
     if 'multiple-images' in binman_node.props:
         for node in binman_node.subnodes:
-            images[node.name] = Image(node.name, node)
+            images[node.name] = Image(node.name, node,
+                                      use_expanded=use_expanded)
     else:
-        images['image'] = Image('image', binman_node)
+        images['image'] = Image('image', binman_node, use_expanded=use_expanded)
     return images
 
 def _FindBinmanNode(dtb):
@@ -399,7 +401,7 @@ def ReplaceEntries(image_fname, input_fname, indir, entry_paths,
     return image
 
 
-def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
+def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt, use_expanded):
     """Prepare the images to be processed and select the device tree
 
     This function:
@@ -413,6 +415,9 @@ def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
         dtb_fname: Filename of the device tree file to use (.dts or .dtb)
         selected_images: List of images to output, or None for all
         update_fdt: True to update the FDT wth entry offsets, etc.
+        use_expanded: True to use expanded versions of entries, if available.
+            So if 'u-boot' is called for, we use 'u-boot-expanded' instead. This
+            is needed if update_fdt is True (although tests may disable it)
 
     Returns:
         OrderedDict of images:
@@ -438,7 +443,7 @@ def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
         raise ValueError("Device tree '%s' does not have a 'binman' "
                             "node" % dtb_fname)
 
-    images = _ReadImageDesc(node)
+    images = _ReadImageDesc(node, use_expanded)
 
     if select_images:
         skip = []
@@ -611,6 +616,13 @@ def Binman(args):
         elf.debug = args.debug
         cbfs_util.VERBOSE = args.verbosity > 2
         state.use_fake_dtb = args.fake_dtb
+
+        # Normally we replace the 'u-boot' etype with 'u-boot-expanded', etc.
+        # When running tests this can be disabled using this flag. When not
+        # updating the FDT in image, it is not needed by binman, but we use it
+        # for consistency, so that the images look the same to U-Boot at
+        # runtime.
+        use_expanded = not args.no_expanded
         try:
             tools.SetInputDirs(args.indir)
             tools.PrepareOutputDir(args.outdir, args.preserve)
@@ -618,7 +630,7 @@ def Binman(args):
             state.SetEntryArgs(args.entry_arg)
 
             images = PrepareImagesAndDtbs(dtb_fname, args.image,
-                                          args.update_fdt)
+                                          args.update_fdt, use_expanded)
             missing = False
             for image in images.values():
                 missing |= ProcessImage(image, args.update_fdt, args.map,

tools/binman/etype/section.py

@@ -84,7 +84,8 @@ class Entry_section(Entry):
         for node in self._node.subnodes:
             if node.name.startswith('hash') or node.name.startswith('signature'):
                 continue
-            entry = Entry.Create(self, node)
+            entry = Entry.Create(self, node,
+                                 expanded=self.GetImage().use_expanded)
             entry.ReadNode()
             entry.SetPrefix(self._name_prefix)
             self._entries[node.name] = entry

tools/binman/image.py

@@ -47,9 +47,23 @@ class Image(section.Entry_section):
             exception). This should be used if the Image is being loaded from
             a file rather than generated. In that case we obviously don't need
             the entry arguments since the contents already exists.
+        use_expanded: True if we are updating the FDT wth entry offsets, etc.
+            and should use the expanded versions of the U-Boot entries.
+            Any entry type that includes a devicetree must put it in a
+            separate entry so that it will be updated. For example. 'u-boot'
+            normally just picks up 'u-boot.bin' which includes the
+            devicetree, but this is not updateable, since it comes into
+            binman as one piece and binman doesn't know that it is actually
+            an executable followed by a devicetree. Of course it could be
+            taught this, but then when reading an image (e.g. 'binman ls')
+            it may need to be able to split the devicetree out of the image
+            in order to determine the location of things. Instead we choose
+            to ignore 'u-boot-bin' in this case, and build it ourselves in
+            binman with 'u-boot-dtb.bin' and 'u-boot.dtb'. See
+            Entry_u_boot_expanded and Entry_blob_phase for details.
     """
     def __init__(self, name, node, copy_to_orig=True, test=False,
-                 ignore_missing=False):
+                 ignore_missing=False, use_expanded=False):
         super().__init__(None, 'section', node, test=test)
         self.copy_to_orig = copy_to_orig
         self.name = 'main-section'
@@ -59,6 +73,7 @@ class Image(section.Entry_section):
         self.fdtmap_data = None
         self.allow_repack = False
         self._ignore_missing = ignore_missing
+        self.use_expanded = use_expanded
         if not test:
             self.ReadNode()