I'll try to stub out some of the porting functions and run the OS as a basic standalone app. Thanks!
> Date: Mon, 28 Apr 2008 14:16:59 -0700 > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED] > CC: u-boot-users@lists.sourceforge.net > Subject: Re: [U-Boot-Users] Running uC/OS-II on top of u-boot > > Hi, > >> We have a PowerPC 440 EP (from a AMCC Yosemite evaluation kit) >> and we are in the process of evaluating OSes for it. The >> industrial strength ones (like vxWorks) are too much >> feature-wise and money-wise, so we're hoping to try out uC/OS-II. >> >> If someone has tried to do this before, I have a few questions: >> >> - How do you configure it to run on top of u-boot? What commands are used? >> >> - Can the porting layer of uC/OS-II use some of the u-boot functions for PCI >> and ethernet access? >> >> - Are there any existing instructions on how to build (or create a makefile) >> uC/OS-II using the compilers supplied by the ELDK? I keep getting a failure >> to "find entry symbol _start", even if I include the gcc libraries, >> crtbegin.o, etc. >> >> I appreciate any help that I can get with my questions. Thanks! > > I have a Yosemite board, but haven't tried running uCOS-II > on it. > > I would suggest creating a uCOS-II port that starts out life > as a U-Boot stand-alone application. > > This way U-Boot sets up the processor, so your uCOS-II port > doesn't have to deal with that. > > In the U-Boot stand-alone application, you would create the > first uCOS-II task and initialize it. The other tasks > would be in the same image loaded by U-Boot. > > You might even get away with using U-Boots console routines, > however, since they're polled, you might want to create your > own. If you do use them, you might want to use a mutex to > protect the console routine use in multiple tasks. > > This scheme is analogous to starting uCOS-II from DOS in > the Labrosse book. It should be possible to exit from uCOS-II > back to the U-Boot console too. > > Cheers, > Dave _________________________________________________________________ In a rush? Get real-time answers with Windows Live Messenger. http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_realtime_042008 ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
