Hi folks,
we'd like to use U-Boot (1.0) on our S3C2410 and NS9750 ARM920 platforms, but will be using NAND flash only. If i'm informed correctly NAND Booting is not yet supported in U-Boot. Therefore I would have to add this myself and want to share my ideas before.
o The relocation in cpu/arm920t/start.S (after relocate:) needs to be replaced by generic code reading the bootloader blocks from NAND and put them in RAM. The NAND_read_block functions are processor/board specific and need to be placed somewhere in board/smdk2410/ etc. o As the S3C2410 reads only the first 4kB of the NAND itself, this code must be placed altogether in the first 4kB o The linker script needs to be modified to put _start, _armboot_start, _armboot_end and _TEXT_BASE in the first 4kB, too, so u-boot can be placed correctly at the end of the RAM o for NAND flashes only, the relocation code may need only the number of blocks to read or may determine that itself by _armboot_end. But using a "block list" programmed into, U-Boot could be used on smart media cards with part of the boot-loader in the filesystem, too.
Any comments?
Best regards,