On Tue, Aug 06, 2013 at 11:22:22AM -0500, Dennis Gilmore wrote:
[snip]
The only way I could see having us write a file to disk with the environment working is if all boards implement standard variable to define the memory locations and that is compiled into the u-boot binary.
some variables that would need to be compiled in
fdt_addr fdt_addr_r
Why two?
kernel_addr_r ramdisk_addr_r pxefile_addr_r scr_addr_r uenv_addr_r
this should allow for for people to use boot.scr uEnv.txt or pxe/extlinux
This is what I think we need to work towards. A board opting into this standard must set CONFIG_CMD_A/B/C (or maybe we add a CONFIG_SUPPORT_GENERIC_LINUX_DISTRO that does this in one of the fallback files, whatever) and provide the following variables PLUS a, and this needs some thinking I think, auto-boot tries to load said file from ... ?
We cannot provide a built-in environment that works for every distro and case, we want the distro to tell us things it knows, and we'll tell it what it can't easily know.