Hi Bob, what is the boot time that you require? With a few optimization tricks like making the kernel XIP from flash and using a patch from celinux to speed up the delay loop calibration you can easily get boot times of a few 100 msecs, depending on your cpu horsepower.
Regards, Erwin Am Mittwoch, den 13.02.2008, 07:03 -0700 schrieb Robert Warner: > Hi > > I'm looking into the prospect of preloading all of the necessary tables > for applications and kernel such that when the device is turned on it > doesn't boot it just starts executing as if it had already gone through > all the booting and application(s) initialization(s). Has this aspect > of system operation with Linux or uCLinux ever been discussed? Search > the web i see instant-on with respect to BIOS (Linux-BIOS) and > SlapshTop's Linux (DeviceVM). > > In the automotive domain embedded systems don't 'boot'. They just start > executing at system start. All tasks and initializations are preloaded. > Some re-initialization of parts of start up are allowed, and at > various points of system operation. Other embedded systems domains also > have the concept of instant-on. > > Obviously, one way to do this is boot the system normally. Record the > current state of the system for all tables preloaded values, saving them > for preloading in the 'instant on release'. I need to think through > this more, but i think it;s clear in what i want to achieve. Just > curious if it's been done with uCLinux recently. > > tia - bob > _______________________________________________ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev -- Dipl.-Ing. Erwin Authried Softwareentwicklung und Systemdesign _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
