On 29.12.2013 19:47, Ian Campbell wrote: > The current arm-uboot image type is hardcoded to run at address > 0x08000000 which means that it cannot be used on ARM systems which do > not have RAM starting from address 0 (which is many of them). This is a > bit of a problem for distros. > > The following series attempts to address this by only performing a > partial link of the arm-uboot kernel.img at build time and enhancing > grub-mkimage to finalise the link to a specific address while building > the core.img. > > I have test this on a Midway system, which has RAM at address 0, linking > to a variety of addresses (0x{0,1,4}8000000) and on a cubieboard2 which > has RAM at 0x40000000-0x80000000 linked at 0x48000000. (there is an > unrelated issue on cubieboard2 relating to the scan for the uboot API > signature, which I'm still investigating, but I hacked around it here > and things worked fine otherwise). > Is there a way to make uboot to load GRUB at some appropriate address. We can do relocations in the startup code if needed. > I have done build only tests of arm64-efi, i386-pc and x86_64-efi. After > running grub-mkimage under faketime the resulting binaries are bit for > bit identical in every case (faketime due to the timestamp in the PE > header). > > I haven't yet integrated this into grub-install, I need to think a bit > more about how to automagically determine the correct link address for a > given platform. > > If no target address is given then the existing hardcoded address > (0x08000000) is used as the default. > > Please CC on any replies since I'm not subscribed. > > Ian. > >
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