On Mon, Oct 07, 2019 at 11:10:24AM +0200, Krzysztof Kozlowski wrote: > On Sat, Oct 05, 2019 at 05:47:43PM +0200, Philippe Mathieu-Daudé wrote: > > Hi all, > > > > Yesterday Peter Maydell asked on IRC if I had any working Exynos4 > > image. I looked at some old backuped notes and could boot Guenter > > initrd with BusyBox. > > I'll use this cover letter to share my notes, they might help to > > have this board fully usable again. > > > > This board is listed as "Odd Fixes". Since we have it covered, I > > thought it was worthwhile to have it covered by tests to avoid > > more regressions. > > > > Frédéric Basse used this board last year: > > https://fredericb.info/2018/03/emulating-exynos-4210-bootrom-in-qemu.html > > > > I'll have a look a these particular commits he added: > > > > - https://github.com/frederic/qemu-exynos-bootrom/commit/9be5c9f2253dbc04ee > > > > sd: add sd clock support to SDHC_CLKCON > > > > - https://github.com/frederic/qemu-exynos-bootrom/commit/6f045949ee2fdec624 > > > > sd: always reply to ACMD41 (SD_APP_OP_COND) > > > > Guenter also carries on this patch: > > > > - https://github.com/groeck/qemu/commit/0a80543cc910d > > > > hw/timer/exynos4210_mct: Initialize timer before starting it > > > > When booting a recent Linux kernel, the qemu message "Timer with period > > zero, disabling" is seen, apparently because a timer is started before > > being initialized. Fix the problem by initializing the offending timer > > before starting it. > > > > It might also be interesting to use Krzysztof's initramfs image: > > https://github.com/krzk/tools/blob/master/run-qemu.sh#L29 > > I haven't been working on QEMU since 2 years but I can try to find that > initramfs image. > > The recent initramfs I create, is for testing kernel under my Buildbot. > I take standard initramfs from Arch ARM and then I add some more stuff: > Source/instruction is here: > https://github.com/krzk/tools/tree/master/buildbot/initramfs > and the script making it for each boot is here: > https://github.com/krzk/tools/blob/master/buildbot/build-slave-deploy.sh#L50 > https://github.com/krzk/tools/blob/master/pi/make-initramfs.sh >
I checked my initramfs. I created it simply from a running Arch ARM instance with `fakeroot mkinitcpio -g file.cpio.gz` You could automatize the process by: 1. Downloading and extracting http://os.archlinuxarm.org/os/ArchLinuxARM-odroid-latest.tar.gz, 2. Running mkinitcpio or creating initramfs manually (e.g. my script above). Best regards, Krzysztof