>> Trouble is that grub-install now rightfully warns about the lack of
>> platform-specific install. >> What do we have to do to register the image at u-boot? >> Put it in specific location? > > EFI provides three very nice things: > - Standardised partition and filesystem type for bootloaders. > - Standardised runtime services for updating selected boot image. > - Standardised "removable media" bootloader path. > > U-Boot has neither, and different platforms use different mechanisms to > affect boot images - some "prime" the enviroment with a uEnv.txt, some > search around a predefined set of filesystems for boot scripts, some > require you to manually "setenv" from within U-Boot. Is environment stored in flash? > > Debian use a special package called flash-kernel to abstract these things > away. > Can we use it? > So in short, I think the only sane thing grub-install can do for arm-uboot, > is what I already have it do - generate an image with the required modules > embedded. If that's the only thing we do, then the warning should be kept. > Now, maybe it shouldn't be grub/arm-uboot/core.img, but that was > what I ended up using. > I'd prefer to keep this file and make a copy if necessarry. >> Also you spoke about relocatable image but AFAICT header always >> specifies load address. Do you have a way around it? > > Well, it's not so much a way around it as somthing that almost ampounts > to a new port (certainly a new image type). > The proper fix would be to generate it as an ELF image _instead_, and use > U-Boot's ELF loader support to load it properly. > It's not really a new port. We already have ports using several image formats, e.g. i386-pc, sparc64-ieee1275, mips-loongson. Doesn't U-boot terminate services if it loads an ELF? How good is its ELF support? Does it handle relocations correctly? If it doesn't we can use -fPIC for kernel.
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