Clint, check the interrupt sub-system of your design. What you describe typically happens when the PPC does not get any interrupts from the UART. It's most likely a mismatch between your hardware and the xparameters.h.
- Peter Clint Thomas wrote: > Hey guys, > > I've run through the loops to try and figure what could be wrong with > this system. The board in question is modeled after the Xilinx ML300 > board. It uses a Xilinx System ACE chip to load a FPGA / Kernel image > from compact flash. Originally, I was trying to use the CompactFlash > as the root file system, but because of issues in either the design or > software, this would only work if SysAce was in polled I/O mode. To > circumvent this, I built my root filesystem into an initrd image and > built a single ELF file with the Kernel and RFS, then strapped that to > the FPGA bit file to make a single FPGA/Kernel/RFS SysAce file. > > Upon decompression, the Linux kernel boots quickly and loads all of > the device drivers. However when it gets to the prompt, it starts > slowing down. Output and input to and from the board becomes very very > slow (it displays 2 characters roughly every 20 seconds). Originally I > believed this to be the CPU still polling SystemAce, so I disabled the > Linux System ACE drivers to remove that as a possibility, however > after doing this, the problem still persists, even with the RFS in > ram! Has anybody encountered a similar situation to this before, with > possible insight towards a solution? Thank you for your time. > > Clinton Thomas > cthomas at soneticom.com > > >------------------------------------------------------------------------ > >_______________________________________________ >Linuxppc-embedded mailing list >Linuxppc-embedded at ozlabs.org >https://ozlabs.org/mailman/listinfo/linuxppc-embedded > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060828/988b4c29/attachment.htm