I am trying to create a bootable SD card. Do the following steps make sense?
1) using (fdisk, cfdisk, ???) create 3 partitions on the card:
p1)a partition for the UBL (uboot)
p2)a partition for uImage
p3)a partition for the filesystem
2) on partition 3, do a mkfs.ext2.
I know not to use a logging fs on an sd card, but I would be
interested in other ideas. jaffs perhaps?
3) using hexedit, modify the first clear block (on a multiple of 512)
to have the following:
0 0xA1AC EDxx Magic number (0xA1ACEDxx)
4 Entry Point Address of UBL Entry point address for the user
boot-loader (absolute address)
8 Number of blocks in UBL Number of blocks (size of user
boot-loader in number of blocks)
12 Starting Block # of UBL Block number where user boot-loader is located
where the last value points to p1
4) Modify uboot so that it can boot off of an SD card. I have a patch
to make the 644x? boot off of SD, and I'm hoping it's a
straightforward port to the DM355. I also have a tech support request
in to TI, but those seem to disappear for me.
Any comments would be much appreciated.
Chris
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