This is awesome! I wonder how they achieved it. Normal boot times for Beagleboard are at least 15-20 seconds.
Perhaps it is using some sort of software suspend/resume functionality? I suspect initializing memory by copying an image directly from flash after U-boot starts up would be about this fast.
Would something like uswsusp/tuxonice (software suspend to RAM or disk) be capable of assisting in quick boot times?
Step 1: Build fully functioning embedded system and boot it.
Step 2: Suspend it in the state you want it be in on boot
Step 3: Hack u-boot to directly load the suspended image
Has anyone done something like this? Is it feasible?
I just saw the link posted by joezydeco (above). It has good links to information on this particular avenue of optimization, particularly: http://elinux.org/Suspend_To_Disk_For_ARM
Perhaps it is using some sort of software suspend/resume functionality? I suspect initializing memory by copying an image directly from flash after U-boot starts up would be about this fast.