On Thu May 19, 2022 at 9:35 PM AEST, Alper Nebi Yasak wrote:
- I noticed that ATF generation for ARM64 Rockchip is done via a Python script instead of binman. I don't currently know how to change that over to binman, but is that something worth pursuing as part of this?
Simon was working on that in [1] (see patches 22-26 which weren't applied), but images produced by that don't exactly work (see comments on earlier versions [2]). Then, things got stalled/postponed because of various issues in binman AFAICT.
The crux of the problem there is the binman-wise design of splitting bl31.elf into parts and putting them into the FIT. I have some weird ideas about generic mechanisms that would allow us to do it nicely, but nothing I could flesh out.
Recently I've been thinking we might be able to sidestep it by putting the unsplit ELF directly into FIT (as a new IH_TYPE_ELF for mkimage?) and do the split-loading at runtime. I didn't have time to experiment on that, though. I'd appreciate it if you tried, but don't worry about it if you don't have the time.
[1] binman: rockchip: Migrate from rockchip SPL_FIT_GENERATOR script https://lore.kernel.org/u-boot/20220306031917.3005215-1-sjg@chromium.org/
[2] rockchip: Support building the all output files in binman https://lore.kernel.org/u-boot/CAPnjgZ37wnb4r7zkkBMfAeGDir147R4kxMwUWAE0nj6i...
Thanks for the information and links to previous attempts.
Unfortunately, I don't think I have either the knowledge or the time to be look into the FIT image generation to that extent in the near future (which is why I didn't try to tackle it in this patch set).