Mikhail Zaturenskiy wrote: > On Thu, Jul 2, 2009 at 2:10 AM, Frank > Svendsbøe<frank.svends...@gmail.com> wrote: >> On Wed, Jul 1, 2009 at 10:14 PM, Mikhail >> Zaturenskiy<mzaturenskiy...@gmail.com> wrote: >> Hmm... according to "Kernel command line: console=ttyCPM0,9600n8 >> loglevel=7" you haven't >> specified where root is. Add root=/dev/ram to the kernel command line, >> and specify where the >> init process is located (for instance init=/sbin/init). >> >> I haven't tried Denks ramdisk image. You can create one for yourself >> using dd, gzip and U-Boots >> mkimage tool. If the ramdisk image is larger than 4MB, you must either >> change the default >> CONFIG_BLK_DEV_RAM_SIZE=4096, or set ramdisk size in the kernel command line. >> >> Btw, I use an older kernel than you use, but I have these defined: >> CONFIG_BLK_DEV=y >> CONFIG_BLK_DEV_LOOP=y >> CONFIG_BLK_DEV_RAM=y >> CONFIG_BLK_DEV_RAM_COUNT=16 >> CONFIG_BLK_DEV_RAM_SIZE=4096 >> >> Maybe they're obsolete now, but you can try to add them to your defconfig >> file. >> >> Good luck ;-) >> > > Thanks Frank, this seems to be leading me down the right path. I tried > some of those defines out yesterday and they got the kernel to at > least attempt to load the ramdisk, so I'm getting somewhere. Also > added root=/dev/ram (also tried /dev/ram0) and init=/sbin/init but for > now things are failing before processing those args. > > I haven't tried CONFIG_BLK_DEV or CONFIG_BLK_DEV_LOOP and am still > playing around with the values for CONFIG_BLK_DEV_RAM_COUNT and > CONFIG_BLK_DEV_RAM_SIZE. Strangely, the DEV_RAM defines are completely > missing from my config so I have to put them in manually... (as > opposed to via menuconfig). I'll post back when it's working or when > I've tried all of this and still am getting some error.
If you don't have CONFIG_BLK_DEV defined, you can't have CONFIG_BLK_DEV_RAM_COUNT or CONFIG_BLK_DEV_RAM_SIZE. Use 'menuconfig' to help straighten this out. > Meanwhile a side question - why does BLK_DEV_RAM_COUNT default to 16? This is just the number of unique RAM disk devices supported. -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
