binman: Add an image header
It is useful to be able to quickly locate the FDT map in the image. An
easy way to do this is with a pointer at the start or end of the image.
Add an 'image header' entry, which places a magic number followed by a
pointer to the FDT map. This can be located at the start or end of the
image, or at a chosen location.
As part of this, update GetSiblingImagePos() to detect missing siblings.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/README b/tools/binman/README
index 8a5f332..ef62d1f 100644
--- a/tools/binman/README
+++ b/tools/binman/README
@@ -640,7 +640,9 @@
Alternatively, an FDT map entry can be used to add a special FDT containing
just the information about the image. This is preceded by a magic string so can
-be located anywhere in the image.
+be located anywhere in the image. An image header (typically at the start or end
+of the image) can be used to point to the FDT map. See fdtmap and image-header
+entries for more information.
Compression
@@ -817,7 +819,6 @@
- Add an option to decode an image into the constituent binaries
- Support building an image for a board (-b) more completely, with a
configurable build directory
-- Support putting the FDT in an image with a suitable magic number
- Support listing files in images
- Support logging of binman's operations, with different levels of verbosity
- Support updating binaries in an image (with no size change / repacking)