El Fri, Mar 05, 2010 at 07:09:11AM -0500 Rishi Dhupar ha dit:
Strange question but I am using an OMAP 3530 and the boot process currently is from TI's X-Loader to U-Boot to Linux.
What I want is to have two different versions of U-Boot, an extremely optimized and small one (to reduce boot time) but then also a debug version that has a built in device test suite and allows updating of the Linux kernel.
The optimized version would boot first and then check if a GPIO is set, if so then it would boot into the debug U-Boot to perform tests or software updates.
Anyone do anything like this or is it even possible?
i think it should be possible, but i wonder if you really need this. do you have hard data that suggest that the test suite or allowing to update the linux slows down U-Boot significantly?
in my environment i use scripts stored in environment variables to update the kernel and the rootfs, afaik this doesn't add any overhead at all. the test suite you mentioned might be a different issue depending on its size, as it has to be copied from flash to RAM at boot time. if it's just adds a few kB i think it shouldn't be relevant, especially on your high-profile system
best regards