David H. Lynch Jr. wrote: > Clint Thomas wrote: > >> Hey guys, >> >> I have gone through the Linuxppc embedded and dev lists for >> information related to what I am trying to do, but was unable to find >> exactly what i'm looking for. >> >> Basically, the system I want linux running on does not require the >> initialization of hardware that U-boot provides, or at least it does >> not need it to boot the linux kernel. I want to load an uncompressed >> linux kernel into memory and start the execution of the kernel, >> without using any kind of bootloader. Is this possible? Or does linux >> need some kind of firmware or other software to tell it to start >> executing? Thanks for any info you might have. > > > You system powers on. It starts executing whatever is at the reset > vector, Something has to get you from the ppc powering up and going to > never never land, to starting to execute Linux. > The steps to get from Power on to booting Linux may not be that > complicated, Much of what needs to be done can likely be included as > part of the code for your board in arch/ppc/boot/simple. > But something still has to be done. > > In my instance I am dealing with a Xilinx V4 (not an ML403). A > small "monitor" program is automatically loaded as part of the FPGA > .bit image. On power on it starts executing.
Curious, how long does the V4 take to load up it's brain? (using a serial EEprom?) > It sets up the CPU, cache, and very minimal hardware > configuration, and then loads Linux out of flash and executes it. > > Linux does not have to have alot setup to boot. But something has > to to some minimal initial setup, get Linux into the memory of your > system, and jump to it. > >> >> Clinton Thomas >> cthomas at soneticom.com >> >> >>------------------------------------------------------------------------ >> >>_______________________________________________ >>Linuxppc-embedded mailing list >>Linuxppc-embedded at ozlabs.org >>https://ozlabs.org/mailman/listinfo/linuxppc-embedded >> > > >-- >Dave Lynch DLA Systems >Software Development: Embedded Linux >717.627.3770 dhlii at dlasys.net http://www.dlasys.net >fax: 1.253.369.9244 Cell: 1.717.587.7774 >Over 25 years' experience in platforms, languages, and technologies too >numerous to list. > >"Any intelligent fool can make things bigger and more complex... It takes a >touch of genius - and a lot of courage to move in the opposite direction." >Albert Einstein > > >------------------------------------------------------------------------ > >_______________________________________________ >Linuxppc-embedded mailing list >Linuxppc-embedded at ozlabs.org >https://ozlabs.org/mailman/listinfo/linuxppc-embedded > Frank Bennett */Technical Contractor/* /Triad Systems Engineering 200 West Mountain Avenue, Suite 103C Ft. Collins, CO 80521 /http://www.traidsyseng.com <http://www.triadsyseng.com> frank.bennett at triadsyseng.com <mailto:frank.bennett at triadsyseng.com>/ /office: 970-493-7586 cell: 970-402-9269 "I think there's a world market for about five computers." -- attr. Thomas J. Watson (Chairman of the Board, IBM), 1943 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060728/87d89ccf/attachment.htm
