Arm bootloader choice
robert.jarzmik at free.fr
Mon Nov 7 13:00:40 EST 2011
I have to choose a bootloader to flash on my board.
I'd like to have :
- the bootloader able to read the kernel and initrd from the flash (a linux
kernel driver is available)
- the bootloader able to bootstrap the linux kernel (obviously)
- optionnaly the bootloader able to output data on USB port
- optionnaly and even better the bootloader to accept input on USB port to boot
a "USB provided kernel"
The board is based on a PXA27x, the flash is a MSystems docg3.
The boot sequence would be :
- PXA27x starts up
- at memory 0 is the IPL from the docg3
- IPL sets up RAM (refresh, etc ...), if comming out of suspend jump
- IPL load SPL from docg3
- SPL starts
The SPL we're talking about is where I want to fit the bootloader.
My questions are :
- is there a bootloader capable of integrating kernel drivers ?
- if there are many (RedBoot ? U-Boot ?), which one would you choose if you
were me and why ?
- as I might to have to adapt the booloader (add flash driver, ...), is there a
simple way to test it, before I flash it to replace the former SPL, assuming I
have a linux kernel booted and functionnal by another way (kexec ? other ?)
Thanks in advance for your advices.
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