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 ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/u-boot-users
