newbie: Kernel panic: No init found

From: Oliver Fuchs (olivers.lists_at_gmx.net)
Date: 06/18/04 

Date: Fri, 18 Jun 2004 15:14:57 +0200

Hi all,

newbie needs help.

I try to get up a custom board (MPC857T; SDRAM 16MB; ttyS0:SMC1; eth0:SCC1).
I have ported U-Boot-1.1.1 and the kernel (2.4.20...) but the kernel
seems to fail mounting the RAM disk as rootfs.
Has anyone an idea what's wrong?

Thanks in advance
Oliver

some helpful prints: 

---
U-Boot 1.1.1 (Jun 18 2004 - 11:44:16)
CPU:   unknown MPC86x (0x06000000) at 50 MHz: 4 kB I-Cache 4 kB D-Cache 
FEC present
          *** Warning: CPU Core has Silicon Bugs -- Check the Errata ***
ONU-S
I2C:   ready
DRAM:  16 MB RAM test passed
Top of RAM usable for U-Boot at: 01000000
Reserving 159k for U-Boot at: 00fd8000
Reserving 1028k for malloc() at: 00ed7000
Reserving 60 Bytes for Board Info at: 00ed6fc4
Reserving 48 Bytes for Global Data at: 00ed6f94
Stack Pointer at: 00ed6f78
New Stack Pointer is: 00ed6f78
relocate_code( 00ed6f78, 00ed6f94, 00fd8000
Now running in RAM - U-Boot at: 00fd8000
...
=> setenv serverip 192.168.156.22
=> setenv ipaddr 192.168.156.40
=> setenv bootargs root=/dev/ram0
=> tftpboot 00100000 oliver/uImage
Using SCC ETHERNET device
Load address: 0x100000
Loading:...done
=> tftpboot 00200000 oliver/rootfs
Using SCC ETHERNET device
Load address: 0x200000
Loading: ...done
=> bootm 00100000 00200000
## Booting image at 00100000 ...
    Image Name:   Linux-2.4.20-rthal5
    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
    Data Size:    558103 Bytes = 545 kB
    Load Address: 00000000
    Entry Point:  00000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 00200000 ...
    Image Name:   Ramdisk image from eldk
    Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
    Data Size:    1459536 Bytes =  1.4 MB
    Load Address: 00000000
    Entry Point:  00000000
    Verifying Checksum ... OK
    Loading Ramdisk to 00d71000, end 00ed5550 ... OK
Linux version 2.4.20-rthal5 (oliver@r522susi) (gcc version 2.95.4 
20010319 (prerelease/franzo/20011204)) #13 Mo Jun 14 1
3:35:42 CEST 2004
On node 0 totalpages: 4096
zone(0): 4096 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/ram0
Decrementer Frequency = 187500000/60
Warning: real time clock seems stuck!
Calibrating delay loop... 49.76 BogoMIPS
Memory: 14764k available (1044k kernel code, 328k data, 44k init, 0k 
highmem)
...
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: loaded (max 8 devices)
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 1024 bind 1024)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
mounting empty RAMFS as root fs SUCCESS
VFS: Mounted root (ramfs filesystem).
Freeing unused kernel memory: 44k init
Warning: unable to open an initial console.
Kernel panic: No init found.  Try passing init= option to kernel.
  <0>Rebooting in 180 seconds..

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