On 27.11.25 07:48, Sune Brian wrote: >> But - as you introduced yourself - raw mode loading is broken for most >> boards, specifically the DE0 Nano SoC. It uses sector-based raw mode by >> default with an offset which only works by chance (if at all). If you >> switch to partition ID mode (like the romloader), everything falls >> apart. That's why I sent the other series. It may not yet be correct in >> all details, though. > > Hi Jan, > > No additional trouble on here but just want to > confirm how you run your DE0 board. > > 1) Do you use a pure MMC boot? (no NOR Flash)
Yes. > 2) You follow old boot flash method write > aka placing "u-boot-with-spl.sfp" to A2. > The "boot+rootfs" partition can be empty or > not exist. > So simply the entire sdmmc just contains A2 and > u-boot can't pass SPL phase enter U-Boot phase? > Are you having this trouble in the first place? I shared our wks file [1]: We create a raw partition in a legacy msdos table, set its system ID to 0xa2 (via [2] when we use a hybrid partition table, or classically [3] before that), and put u-boot-with-spl.sfp into it. SPL is picked up by the romloader, but SPL in upstream completely fails to find u-boot proper in that partition. And that is first of all because SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is enabled by default which ignores any partitioning and only uses a hard-coded sector. If one switches to SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE mode, other bugs after 2a00d73d081a surface like no longer built code or wrong offsets inside the partition, and you also end up without u-boot proper being found. Whatever other partitions or partition tables exist on the SD card does not matter for SPL loading u-boot proper. Jan [1] https://gitlab.com/cip-project/cip-core/isar-cip-core/-/blob/fa81b7aa856049af984f404047a2005d251b6072/wic/de0-nano-soc.wks [2] https://gitlab.com/cip-project/cip-core/isar-cip-core/-/blob/fa81b7aa856049af984f404047a2005d251b6072/scripts/lib/wic/plugins/source/de0-nano-soc-firmware.py [3] https://github.com/ilbers/isar/blob/master/meta-isar/scripts/lib/wic/canned-wks/de0-nano-soc.wks.in -- Siemens AG, Foundational Technologies Linux Expert Center
