>
> Did you face any mmc problem when booting dom0?
>
> After I did some io mappings, I could finally get Linux kernel booting
> message now. But it seems it still has some problems with mmc0:
>
> mmc0: unrecognised SCR structure version 1
> mmc0: error -22 whilst initializing SD card
>

Chen,

Make sure you have
CONFIG_MMC=y
CONFIG_MMC_OMAP_HS=y
in your linux config.

We faced something similar with LK 3.8 omap2plus_defconfig.

Sincerely,
Andrii Anisov.