Hi, On Fri, Mar 20, 2009 at 10:30 PM, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote: > > (i posted on this on the ARM mailing list but i'm still waiting to > hear if my attempt at subscribing to that list was accepted. so i'll > reproduce the problem here and hope for the best.) > > i have a technologic TS-7250 ARM-system with a homegrown in-flash > 2.6.17 kernel and very old busybox-1.2.1 based root filesystem, but it > boots and runs just fine via the RedBoot bootloader. Could you post redboot configuration? And also configs for working and not working kernels? Seems to me that u do not have correct File System support. If u have mounted a wrong partiton for root partition or missed out something from your kernel config. > > the redboot-configured kernel command line is: > > exec -c "console=ttyAM0,115200 root=/dev/mtdblock2" > > so, obviously, /dev/ttyAM0 represents the console serial port and > /dev/mtdblock2 holds the rootfs. during the kernel boot process, you > can see, among other things: > > ... > Serial: AMBA driver $Revision: 1.41 $ > apb:uart1: ttyAM0 at MMIO 0x808c0000 (irq = 52) is a AMBA > apb:uart2: ttyAM1 at MMIO 0x808d0000 (irq = 54) is a AMBA > apb:uart3: ttyAM2 at MMIO 0x808e0000 (irq = 55) is a AMBA > ... > yaffs: dev is 32505858 name is "mtdblock2" > yaffs: Attempting MTD mount on 31.2, "mtdblock2" > Reading data from NAND FLASH without ECC is not recommended > Reading data from NAND FLASH without ECC is not recommended > VFS: Mounted root (yaffs filesystem). > Freeing init memory: 76K > Reading data from NAND FLASH without ECC is not recommended > Reading data from NAND FLASH without ECC is not recommended > mounting ramfs at /dev > mounting /proc > mounting /sys > starting udevd... > ... > > in other words, it all looks good. > > now, what i'm trying to do is, using a custom 2.6.21 source tree > from technologic, build and boot a 2.6.21 kernel. i have access to > the 2.6.17 config file via /proc/config.gz so, reading through that, > i've tried to configure the 2.6.21 source tree as similarly as i can. > that doesn't quite do it as, once i build that new kernel and load it > into RAM via TFTP, i get: > > ... > Serial: AMBA driver $Revision: 1.1.1.1 $ > apb:uart1: ttyAM0 at MMIO 0x808c0000 (irq = 52) is a AMBA > apb:uart2: ttyAM1 at MMIO 0x808d0000 (irq = 54) is a AMBA > apb:uart3: ttyAM2 at MMIO 0x808e0000 (irq = 55) is a AMBA > ... > yaffs: dev is 32505858 name is "mtdblock2" > yaffs: passed flags "" > yaffs: Attempting MTD mount on 31.2, "mtdblock2" > VFS: Mounted root (yaffs filesystem). > Freeing init memory: 96K > Warning: unable to open an initial console. > Kernel panic - not syncing: No init found. Try passing init= option > to kernel. > > from the above, it seems clear that the rootfs was mounted, but > that's as far as i get -- failure to open an initial console. > usually, i interpret that as that i'm missing, say, /dev/console or > something. but this is not as big a jump as going from a 2.4 to a 2.6 > kernel. it's just 2.6.17.10 to 2.6.21, both kernels are trying to use > the same root filesystem, i've done everything i can to configure them > similarly, etc. so i'm kind of stumped. any thoughts as to what i > should be looking for? > > i have access to the config files for both kernels, i can certainly > boot the 2.6.17 kernel and poke around, through things like lsmod and > /proc. i've tried everything i can think of to figure out why i can't > get an initial console. so i'm open to suggestions. > > rday > -- > > ======================================================================== > Robert P. J. Day > Linux Consulting, Training and Annoying Kernel Pedantry: > Have classroom, will lecture. > > http://crashcourse.ca Waterloo, Ontario, CANADA > ======================================================================== > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > Please read the FAQ at http://kernelnewbies.org/FAQ > > good luck, Marek -- as simple as primitive as possible ---------------------------------------------- Marek Beliško - open-nandra Ruská Nová Ves 219 08005 Prešov Slovakia http://open-nandra.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
