On 07/20/2011 12:27 AM, Hamo wrote:
Thanks. Since we want to make use of the romstage code, we need a CPU
that supports boot from SPI or Nor Flash (because we need to run code
in the rom) and a board that has a SPI or Nor Flash on it.
There are ARM boards around that use a SPI or NOR flash to store the
init and bootloader but most new boards and tablets store it in NAND or
eMMC with support for SD Card, serial or USB boot as well. The boot
device order is set by pin straps. If the cpu doesn't see a boot string
it will scan the next peripheral port until it finds one.
http://www.mini-box.com/mini2440v2 is an old ARM9 dev board that is
still readily available the uses a 2MB NOR Flash for init and
bootloader. Most ARM systems that will make use of coreboot won't have a
separate SPI or NOR flash to hold the init and bootloader. But you have
to start somewhere. We'll just have to make this work from on-board
NAND, eMMC or SD Card later.
-Bari
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