TDA2: Dual partition layout for enhanced software upgrade and support rolback

Hello:

   For safety software upgrade, we expect to use two partition, partition A and B based on NAND.

1.   A and B both contain the whole image
2. when A is active, new software is download to B,and then active B.

my question:

1.  does current TI has the sample solution for this ?
2. does the u-boot already support this to read the partitions alternatively and load image correctly?
3. For linux image in each partition, we also expect to use dual FS partition for linux upgrade, please have look at  https://wiki.yoctoproject.org/wiki/System_Update   
   1. does TI already support it in SDK
   2. Any sample for share?

Thanks!