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Fedora Embedded at foss.in 2010
- 1. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? foss.in/2010 - Fedora Embedded and QEMU/ARM hands on ƒ—leem ens—ri Fedora IUth he™em˜er PHIH Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 2. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? 1 egend— 2 pedor— im˜edded ƒsq ! ƒpe™i—l snterest qroup 3 ƒome ˜—™kground 4 e ˜—si™ h—ndsEon with iw…Ge‚w 5 pedor— e‚w snfr—stru™ture 6 uestionsc Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 3. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Agenda pedor— im˜edded ƒsq ! ƒpe™i—l snterest qroup ƒome ˜—™kground knowlege e ˜—si™ h—ndsEon with iw…Ge‚w pedor— e‚w snfr—stru™ture Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 4. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Fedora Embedded SIG Special Interest Group qo—ls E httpXGGfedor—proje™tForgGwikiGƒsqsGim˜edded Create high quality packages of cross-compilers and related tools Provide packaging guidelines Make distribution releases on sub architectures „—rgeted pl—tformsG—r™hesX e‚wD e†‚QPD e†‚D fl—™k(nD „sqggD ‚„iwƒD others por this t—lk we will fo™us on e‚w —r™hite™ture Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 5. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Why Fedora on ARM architecture? Multiple reasons! PHHUX £ WV7 of one ˜illion mo˜ile phones sold e—™h ye—r use —t le—st one e‚w pro™essorF PHHWX £ WH7 of —ll em˜edded QPE˜it ‚sƒg pro™essors —re e‚w pro™essorsF PHIHX £ S fillion e‚wW pro™essors h—ve ˜een shipped so f—r e‚w pro™essors to enter server m—rkets E w—rvell9s —nnoun™ement e‚w pro™essorE i—gle based on Cortex A15 architecture, it has hardware virtualization support! yv€g is — one ˜ig proje™t whi™h interested to use pedor— e‚w port Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 6. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Some background €l—tform G pro™essor sele™tion for — vinuxGem˜edded proje™t at-least 32bit processor processor should have a MMU non-MMU based processors can use ucLinux however you have to modify applications too oating point unit which optional and can be emulated by libraries Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 7. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Why do we need a boot loader? „here is — lot of work done ˜y ˜oot lo—derF uernel —ssumes th—t — lot of system initi—liz—tion is —lre—dy doneX conguring memory sub-system. loading kernel image at the correct memory address loading initial RAM disk ( optional ) initializing boot parameters obtaining the ARM Linux machine type initializing register variables for entry into kernel ‡riting ™ode for —ll this isX highly error prone, repetitive, cumbersome and boring a readymade bootloader generally just ts in Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 8. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Why do we need Linux Kernel? vinuxD ofE™ourseD is ypen ƒour™e †endor sndependen™e €yƒsˆ ™ompli—n™e †—ried r—rdw—re ƒupport linux kernel h—s m—ny devi™e drivers —lre—dy ˜uilt ˜y someone provide us with well dened device interfaces does the grunt work of hardware level interfacing with the devices driver works on another hardware with usually very few changes Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 9. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? About QEMU iw… is —n emul—tor for popul—r g€… x86, ARM, PowerPC, Sparc32/64, MIPS and ColdFire AVR32 support is in progress at http://repo.or.cz/w/qemu/avr32.git It also simulates peripheral devices, basically a complete System on Chip. ‡h—t m—kes iw… spe™i—l for doing em˜edded systems developmentc No need of actual hardware for prototyping. Its greener- no need of any power source. Many projects already use QEMU Android, MeeGo, etc. Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 10. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Hands-on. We will discuss the following: hevelopment setup up ARM toolchain, QEMU etc. ‡h—t h—ppens —t system resetc Initialization. Bootloader. Kernel. Initial root lesystem. Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 11. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? System setup pedor— e‚w „ool™h—in ARMv5 only - http://fedoraproject.org/wiki/Architectures/ARM/CrossToolchain iw…Ge‚w mkim—ge E tool to ™re—te ˜oot im—ges other tools bridge-utils ( optional ) koji Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 12. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? What happens when an ARM based board is powered ON? …nderst—nd the memory m—p for ‚ew —nd ‚yw ƒt—rtup ™ode First instruction Vector table Stack initialization Relocating the RAM to a dierent address Running from RAM Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 13. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Hands on: „—rget h—rdw—re E †ers—tile€f E emul—ted iw… vets m—ke — minim—listi™ linux ˜—sed system on e‚w pollowing steps —re involvedX Compile and congure U-Boot boot-loader Compile and congure Linux Kernel Create a root le-system We will use Busybox for shell command interface Shove all of them into a one big chunk to be ashed onto memory Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 14. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? What we learn from this excercise? sts — gre—t le—rning experien™e rowever its not produ™tive in the long termF st doesn9t s™—le to thous—nds of softw—re p—™k—gesF pedor— e‚w port solves this pro˜elmX Proven packaging technology already in use in many of the most popular distros Reduce development time and time to market for your next device Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 15. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Fedora ARM Infrastructure ƒene™— gentre for hevelopment of ypen „e™hnology @ghy„A —t the ƒ™hool of gomputer ƒtudies —t ƒene™— gollegeD „orontoF httpXGGzenitFsene™—™FonF™—GwikiGindexFphpGpedor—•e‚w•ƒe™ond—ry• httpXGGzenitFsene™—™FonF™—GwikiGindexFphpGpedor—•e‚w•uoji•fuild v—test newsX http://fedora-arm.blogspot.com/ http://paulfedora.wordpress.com/ gurrent st—tus p—ge http://arm.koji.fedoraproject.org/status/ ‚e™ent video ˜y €—ul ‡h—len http://fsoss.senecac.on.ca/2010/node/24 Embedded and QEMU/ARM hands o Saleem Ansari foss.in/2010 - Fedora
- 16. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Bulding packages for Fedora ARM gre—te or (x —n existing ƒ‚€w p—™k—ge ƒ™hedule — ˜uild on e‚w uoji to ™re—te ‚€w ghe™k —nd (x if ne™ess—ry e‚w uoji we˜ interf—™e wore on rowto use koji http://fedoraproject.org/wiki/Koji Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 17. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Contributing to Fedora/ARM fedor—proje™tForgGwikiGer™hite™turesGe‚wGrow„oemu w—iling list https://admin.fedoraproject.org/mailman/listinfo/arm s‚g E 5fedor—E—rm on ir™FfreenodeFnet sssues not yet resolvedX https://bugzilla.redhat.com/show_bug.cgi?id=ARMTracker wore info —tX http://fedoraproject.org/wiki/Architectures/ARM/Team_and_Develo Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 18. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Current state of aairs in Fedora/ARM pedor— IQ rele—se for e‚w will hopefully ˜e ne—r ˆm—sF „he def—ult tool™h—in is still for e‚wvS —nd doesn9t support h—rdfp so m—y of the modern e‚w g€…s —ren9t optim—lly used plo—ting point support in the pedor—Ge‚w ™ross tool™h—inX Discussion is on for which of soft/softfp or hardfp to select for upcoming ARMv7 toolchain yv€g @™urrently the only one e—ger to use pedor— e‚w for — l—rge s™—le proje™tA they seem to be aiming to jump from F-11 to F-14, for their next release its not clear if that includes XO-1.75 ( the OLPC's ARM target ). Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 19. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Questions? Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o
- 20. Agenda Fedora Embedded SIG Special Interest Group Some background A basic hands-on with QEMU/ARM Fedora ARM Infrastructure Questions? Thank you! tuxdn— —t 5fedor—E—rm on ir™FfreenodeFnet Saleem Ansari foss.in/2010 - Fedora Embedded and QEMU/ARM hands o