Hello Pantelis,
short question to the usage of the mmc command (and also the mmc driver API): is it intended that mmc read / write may fail when the supplied address in RAM is not aligned?
ARMV7 will give output like this:
U-Boot > mmc read 12000002 44 44
MMC read: dev # 0, block # 68, count 68 ... INFO: 24994 of 25000 loops left to DAT0 timeout ERROR: v7_dcache_inval_range - start address is not aligned - 0x12000002 ERROR: v7_dcache_inval_range - stop address is not aligned - 0x12008802 68 blocks read: OK
On my platform (i.MX6 / Cortex A9) the alignment needed is 32 Byte.
Special commands inside the mmc drivers and in env_mmc implement the alignment magic. Shouldn't the mmc do the magic (and if neccesarry provide help using temp buffers if needed) so that all users outside can read / write without caring for special cases?
Markus