On Sun, Mar 16, 2008 at 1:15 PM, André Schwarz <[EMAIL PROTECTED]> wrote: > All, > > I'm quite stuck in getting our MPC5200B based systems work on 2.6.24+ > ... maybe someone could give me some hints. > Up to now the systems have been running on 2.6.19 without any problems. > > This is what I've done so far : > > - get a recent system with 2.6.19 running and keep the toolchain (gcc > 4.0) including RFS uImage. > - latest bootloader (u-boot 1.3.2) is running fine with dtb support. > - Kernel and RFS images are available via bootp/tftp > - device tree blob seems ok, i.e. u-boot can display the blob and fill > in all clocks correctly. > - Kernel gets called with Kernel, RFS and dtb on suitable adresses > (0x100000, 0x600000, 0x5F0000). > - nothing more happens. It looks like the console isn't working properly > - maybe worse ...
Can you either halt the processor or reset the board and access memory after this point? You should see if you can access __log_buf (Look in System.map for the address and subtract 0xc0000000 to get the physical address). __log_buf should give you clues about how far booting progresses. > The kernel has been build using the "MPC5200 simple" setup. I've added > our board identifier "mv,mvbluecougar" to the list of supported boards > in the "mpc52xx_simple.c" file. This identifier is used in the dtb as > well of course. This should be enough along with a valid device tree > blob, isn't it ? Did I miss anything already ? Yes, this should be enough (on a side note; it should probably be "matrix-vision,bluecougar" unless of''mv' is your company's stock ticker symbol). > > As far as I did understand by reading the docs it should be possible > running a general MPC52xx kernel with a custom dtb ? Is this correct ? That is correct. > The dts file has already been reduced to a minimum, i.e. only the cpu, > pic, xlb and a few nodes like psc1 and psc2 are present. No bestcomm, > pci, ata or "advanced" features like mtd partitions. All I want to get > working is the serial console on "/dev/ttyPSC0". Cheers, g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev