In message 200604261502.02751.ngustavson@emacinc.com you wrote:
So what is your problem - you have the image, and want to write it to flash. Why would you need any additional tools for that?
Because I want to write it through the uClinux MTD layer, which has nothing to do with u-boot, other than the fact that the flashing utility needs to calculate a checksum and verify it against the package, which is the "ubootian" format created by mkimage.
Maybe you explain in more detail what you intend to do. I don't see why "the flashing utility needs to calculate a checksum" - the uImage file already has two checksums, so no new calculation should be needed.
If you use the MTD layer as a blockdevice, you will probably have a file system there; then you can just use "cp" as "flashing utility" and "mkimage -l" to verify the checksums after writing.
If you use a character device, you can just use "cp" as "flashing utility" and "mkimage -l" to verify the checksums after writing; probably an additional step will be nedded to reead back the MTD character device in a file, making sure only the original amount of data is read back; a tiny shell script based on "ls" and "cut" and "dd" will do).
I have no idea what you could need special tools for.
This is really a question for both the uClinux and u-boot communities.
Actually this has nothing to do with uClinux, and very little with U-Boot.
If a section of what I'm asking does not apply to your work then please ignore it.
You post her, I reply here.
Best regards,
Wolfgang Denk