On Mon, May 02, 2022 at 08:35:55AM +0200, Ahmad Fatoum wrote: > There is, but I'd check first if it's possible to boot from eMMC only > as a fallback if SD boot failed. On some bootroms, this is possible > and can easily be scripted in barebox with $global.bootsource > and $global.bootsource_instance variables. When I type "magicvars" I have no global.boosource. Is that a "no bootsource in your bootrom" or has this a fetaure to be enabled as a CONFIG_ at compile time? However, booting from internal MMC is normal use case, SD-Cards are only inserted for updates and if some invalid SD-Card is inserted and system does not boot because of that I can live with that. > title BeagleBone Black - M2M > version 5.17 > options rootwait > linux /boot/zImage > devicetree /boot/am335x-boneblack.dtb > linux-appendroot true > > This way, you can just type boot mmc1.1 to boot. linux-appendroot > will have barebox add a root= option pointing at the device it read > the bootloader spec file from. You'll want to set CONFIG_MMCBLKDEV_ROOTARG=y > to get root=/dev/mmcblk* fixups instead of partuuid (which might be the > same if you have the exact same image on SD and eMMC). I already investigated bootloader spec but have it much more complicated in memory. This is darn simple and allows me to boot from different partitions with this same identical setup, right? I will go for it. I have no CONFIG_MMCBLKDEV_ROOTARG=y, UUID is fine since all roots are individually formatted, no same image. But alas, the rootfs is not appended. I created an entry just like you proposed and this happens: barebox@TI AM335x BeagleBone black:/ boot mmc1.2 ext4 ext40: EXT2 rev 1, inode_size 256, descriptor size 64 Booting entry 'BeagleBone Black - M2M (/mnt/mmc1.2/loader/entries/boneblack.conf)' blspec: booting BeagleBone Black - M2M from mmc1 Loading ARM Linux zImage '/mnt/mmc1.2//boot/zImage' Loading devicetree from '/mnt/mmc1.2//boot/am335x-boneblack.dtb' commandline: console=ttyS0,115200n8 rootwait [...] Waiting for root device ... What could I do about this? > boot already accepts multiple boot targets to try in order, Okay, I was just not aware somehow. To use it for that. So /env/nv/boot.default will take "mmc0.1 bootchooser" with bootchooser deciding between internal mmc1.1 and mmc1.2. If i get bootloader spec booting to fly. > if detect mmc0; then > boot mmc0.1 > fi > > boot mmc1.1 Where is this scripting stuff going into? It is not boot.default (gives me errors like "no entry if ... found"), is this going into entry boot.default points to? Since I have bootloader spec not running yet, I have "insidem2m_sd bootchooser" in /env/nv/boot.default. This works well, if no SD-Card is inserted and I get a nasty red error with both variants. Without the detect mechanism in insidem2m_sd I get Booting entry 'insidem2m_sd' mount: No such file or directory could not open /mnt/mmc0.1/boot/zImage: No such file or directory ERROR: Booting entry 'insidem2m_sd' failed Booting entry 'bootchooser' with this detect mechanism I get Booting entry 'insidem2m_sd' detect: Connection timed out ERROR: Running script '/env/boot/insidem2m_sd' failed: error -127 ERROR: Booting entry 'insidem2m_sd' failed Booting entry 'bootchooser' Each time it goes to bootchooser which successfully boots internal MMC... When SD-Card is inserted it chooses it successfully in both ways, so both variants work well. > On less recent kernels, the order might change, but at least now it's > fixed (with aliases). I spent the whole day to update Kernel, bootloader, rescue SD-Cards, Install scripts so now internal mmc is mmcblk1, external SD-Card is mmcblk0 (5.10.12 -> 5.10.63). Like barebox was alaways. Kind Regards Konstantin Kletschke -- INSIDE M2M GmbH Konstantin Kletschke Berenbosteler Straße 76 B 30823 Garbsen Telefon: +49 (0) 5137 90950136 Mobil: +49 (0) 151 15256238 Fax: +49 (0) 5137 9095010 konstantin.kletschke@xxxxxxxxxxxxx http://www.inside-m2m.de Geschäftsführung: Michael Emmert, Ingo Haase, Dr. Fred Könemann, Derek Uhlig HRB: 111204, AG Hannover _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
