On Sat, Mar 12, 2016 at 10:13:43PM +0100, Mateusz Kulikowski wrote: > On 12.03.2016 00:58, Daniel Glöckner wrote: > > It is also confusing to have the "add" instruction in there without an > > explanation, especially because having it at offset 4 instead of 0 defeats > > its original purpose (MZ EXE signature for EFI). > > My bad, I should have put it the other way around: > add x13, x18, #0x16, > b _start > > Will do that for v3
The Dragonboard doesn't have an EFI BIOS, so we don't need that signature. I'd replace it with a ".long 0" (after the branch instruction of course), as it is done in Linux when CONFIG_EFI is not defined. > > I know the goal is to eventually replace Little Kernel, but how about > > using the device tree passed by it? We could add some code to head.S that > > saves x0 in sp_el0 and abuse CONFIG_OF_HOSTFILE to retrieve it. > > I prefer not to (at least for now) - It will not give us significant benefits > (image will be a bit smaller and boot slightly faster, but it's not an issue > as U-Boot replaces huge kernel image) and will just confuse people > that already are using it. Is it fine with you? No need to ask me. I'm not a regular on this list. Best regards, Daniel -- Dipl.-Math. Daniel Glöckner, emlix GmbH, http://www.emlix.com Fon +49 551 30664-0, Fax +49 551 30664-11, Bertha-von-Suttner-Straße 9, 37085 Göttingen, Germany Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160 Geschäftsführung: Dr. Uwe Kracke, Ust-IdNr.: DE 205 198 055 emlix - your embedded linux partner _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
