[U-Boot] eMMC 4.41 boot partition booting issue

harsha kiran kj.h.kiran at us.abb.com
Fri Apr 24 22:50:13 CEST 2015


Hi Starr,

I think i figured out how to access the GP partitions on the new new uboot.
Solution:
1)We can only have access to one partition at a time from uboot.

2) GP partitions have to be partitioned again to be from kernel
(/dev/mmcblk0gp0p1,/dev/mmcblk0gp1p1,/dev/mmcblk0gp2p1,/dev/mmcblk0gp3p1)..
If you just have mmcblk0gp0, mmcblk0gp1, mmcblk0gp2, mmcblk0gp3 uboot cannot
access them. 

3) in uboot, by default mmc part will display the user data partition
information.

4) To access GP1 partition issue the following commands..

mmc rescan
mmc partconf 1 0 0x7 0x4               (1 = emmc, 0= bootack, 0x7= user data
boot part, 0x4 = Access to GP1)
mmc part 
-----------Now mmc part will display the gp1p1 data.
similarly for GP2
mmc rescan
mmc partconf 1 0 0x7 0x5               (1 = emmc, 0= bootack, 0x7= user data
boot part, 0x5 = Access to GP2)
mmc part 


Thanks,
Harsha



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