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/test/116_fdtmap_hdr.dts b/tools/binman/test/116_fdtmap_hdr.dts
new file mode 100644
index 0000000..77a2194
--- /dev/null
+++ b/tools/binman/test/116_fdtmap_hdr.dts
@@ -0,0 +1,17 @@
+/dts-v1/;
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ binman {
+ size = <0x400>;
+ u-boot {
+ };
+ fdtmap {
+ };
+ image-header {
+ location = "end";
+ };
+ };
+};