Hi Ottinger,

Perhaps you can enable CONFIG_CMD_FS_GENERIC=y in your config and try to use the generic commands - size, load, save, ls, ln, fstype, fstypes?

Regards, Jonathan

On Tue, 30 May 2023 at 22:07, Ottinger Georg g.ottinger@abatec.at wrote:

Hi Everybody,

I am currently evaluating filesystems that can be used reliable on eMMC storage, which support transparent compression.

I see that U-Boot supports btrfs. But I don't understand how to load for example a kernel image from the fs, I was expecting 'btrload' as an analog to 'ext4load' or 'fatload'.

Is there a reason why this commands are not implemented?

When I do patch the file cmd/btfs.c to add 'btrload' I do get a working U-Boot capable of loading DT and kernal image from btrfs.

''' char subvolname[1];

int do_btr_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) {

subvolname[0] = '\0';

return do_load(cmdtp, flag, argc, argv, FS_TYPE_BTRFS); }

U_BOOT_CMD( btrload, 7, 0, do_btr_fsload, "load binary file from a btr filesystem", "<interface> [<dev[:part]>] <addr> <filename>\n" " - Load binary file 'filename' from 'dev' on 'interface'\n" " to address 'addr' from better filesystem.\n" " the load stops on end of file.\n" " All numeric parameters are assumed to be hex." ); '''

Are there any known stability issues, why 'btrload' and 'btrfs' are not included in the current U-Boot? Or is there an alternative to 'btrload' to load a kernelimage from fs to ram?

thanks, Georg

Georg Ottinger

Software Engineer

RESEARCH & DEVELOPMENT

ABATEC GmbH

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