On 10/19/07, aauer1 <[EMAIL PROTECTED]> wrote: > > > > Grant Likely-2 wrote: > > > > On 10/19/07, aauer1 <[EMAIL PROTECTED]> wrote: > >> > >> Hello > >> > >> I'm trying to boot a Linux Kernel 2.6.23-rc2 from Grant Likely (thanks > >> for > >> the great work) on a Xilinx ML403 board. I want to use the second > >> partition > >> of the Compact Flash Card as root filesystem. But the boot process hangs > >> at > >> the initialization of the SystemACE module. A strange effect is that the > >> DONE LED (configuration of the FPGA is done) turns off. So, this means > >> that > >> the FPGA loses his configuration. > >> Has anybody recognized a similar problem with the SystemACE module?? > >> > >> The boot log: > >> ======== > > [snipped] > >> [ 0.268807] uartlite.0: ttyUL0 at MMIO 0x40600000 (irq = 2) is a > >> uartlite > >> [ 0.270399] console [ttyUL0] enabled > >> [ 1.762725] RAMDISK driver initialized: 8 RAM disks of 8192K size 1024 > >> blocke > >> [ 1.852062] Registering Xilinx SystemACE driver, major=254 > >> [ 1.919734] xsysace xsysace.0: ace_probe(c01638e0) > > > > Yes, I've seen that. It means something went wrong with the setup and > > caused the sysace to reload the FPGA. Is the systemace base address > > and bus width set correctly? > > > > > > The base address is the same as in the system.mhs file of my hardware > design. So, I think it should be correct. The bus width is set to 16 bits > (hardware design). So far as I can see, the sysace driver defines a 16 bit > data bus (hard coded), too.
Hmmm; that's all very odd. I don't know what could be causing that. > A paper of BlueCat Linux says that there is a problem with the System ACE > hardware module: > "Due to a known problem of the opb_sysace IP Core programmed into the FPGA > (incorrect operation in the interrupt mode) the SystemACE Compact Flash > device is supported in the polling mode." > > Does anyone know something about the bug in the SystemACE IP core?? I don't know about the old xilinx supplied sysace driver, but the new xsysace.c driver is robust enough to work around missed interrupts. I don't know of any other problems with the opb_sysace IP core. Cheers, g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. [EMAIL PROTECTED] (403) 399-0195 _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
