The boot sequence for the DM355 is: RBL -> rom boot loader which loads... UBL-> user boot loader which loads... u-boot-> which loads uImage-> which loads the rest of linux.
1) using (fdisk, cfdisk, ???) create 3 partitions on the card: p1)a partition for the 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? Ext2 does work. 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 4) find somewhere in the early bocks to insert the UBL. Edit the entry in step 3 to reflect it's location and size. One of the major problems is that UBL needs to be modified to find U-Boot on SD card. The uboot shipped with dvsdk only boots off of nand. 5) 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. 6) copy (using dd) uboot into p1 7) copy (using dd) uImage into p2 8) copy filesystem into p3 Any comments would be much appreciated. Chris -- Chris _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
