[U-Boot-Users] RAMDISK image in flash not getting mounted - Memec Powerpc405 board

[Shamile Khan]

Hi,

Yeah that was the problem. So now it boots all the way. I
am not sure what this Simple Ramdisk-Image is composed of
as I do not get to a promt. I get nothing on the terminal.

Shamile 

--- Kyle Harris <kharris at nexus-tech.net> wrote:
> Shamile,
> 
> Do you have the proper fs (e.g. ext2, minix, or whatever
> your ramdisk is) 
> support configured in the kernel? Looks like it finds the
> ramdisk but can't 
> decipher contents.
> 
> HTH, Kyle.
> 
> On Wednesday 05 November 2003 07:59 pm, Shamile Khan
> wrote:
> 
> > Hi,
> >
> > I am trying to get Linux to boot with U-boot using a
> flash
> > based initrd image. I am using a Memec Virtex II Pro
> board
> > which has a Powerpc 405 processor embedded in an FPGA.
> I
> > have u-boot running. My flash is 8 Megs and is
> organized as
> > follows:
> >
> > 0xFE000000 - U-boot
> > 0xFE100000 - Linux u-boot kernel (vmlinux.PPCBoot)
> created
> > using latest sources from ppckernel.org
> > 0xFE200000 - Simple Ramdisk-Image
> (simple-ramdisk.PPCBoot )
> > from DENX.de
> >
> > The boot arguments I pass using u-boot are
> > bootargs=console=ttyS0,115200 mem=32M root=/dev/ram rw
> >
> > Some relevant kernel configuration parameters are
> (using
> > xilinx_ml300 as base)
> >
> > # Block devices
> > CONFIG_BLK_DEV_RAM=y
> > CONFIG_BLK_DEV_RAM_SIZE=4096
> > CONFIG_BLK_DEV_INITRD=y
> >
> > # File systems
> > CONFIG_TMPFS=y
> > CONFIG_RAMFS=y
> >
> > However when I use "bootm fe100000 fe200000" to boot
> linux,
> > I get all the way to the end of the boot process at
> which
> > point I get this message:
> >
> > RAMDISK: Compressed image found at block 0
> > Freeing initrd memory: 554k freed
> > Kernel panic: VFS: Unable to mount root fs on 01:00
> >
> > Seems like it located the RAMDISK image but is not able
> to
> > mount it. Any ideas on what is causing this to occur.
> >
> > I did a backtrace using gdb over abatron  and heres
> what I
> > get (breakpoints don't seem to work for me though
> although
> > I can get a stach trace)
> > #0  0xc000678c in __delay ()
> > #1  0xc0014734 in panic (fmt=0x1cfde0 <Address 0x1cfde0
> out
> > of bounds>) at
> >
>
/home/shamile/ecsi-linux/kernel/src-linuxppc_2_4_devel/include/asm/delay.h:
> >42 #2  0xc00fcac8 in mount_block_root (name=0xc00d5ea4
> > "/dev/root", flags=32768) at init/do_mounts.c:376
> > #3  0xc00fd4d4 in mount_root () at init/do_mounts.c:789
> > #4  0xc0002888 in prepare_namespace () at
> > init/do_mounts.c:917
> > #5  0xc0002458 in init (unused=0xc2c1) at
> init/main.c:556
> > #6  0xc0006f60 in arch_kernel_thread ()
> >
> > Thanks,
> > Shamile
> >
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