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MVME2306: Kernel panic

Hi all,

I install Potato PowerPC PReP on a MVME2306 diskless board.
Install program run correctly, kernel an base system are on the server
Now I want to boot but I don't know how to specifie that root fs is a nfs
Boot parameters seems to be ignored.
What is wrong ??


here is the boot sequence : (/tftpboot/vmlinuz.2300 is a link on
/nfsroot/boot/vmlinuz-2.2.14 and I want to mount /nfsroot as root fs)

Copyright Motorola Inc. 1988 - 1997, All Rights Reserved

PPC1 Debugger/Diagnostics Release Version 3.5 - 01/30/98 RM01
COLD Start

Local Memory Found =02000000 (&33554432)

MPU Clock Speed =300Mhz

BUS Clock Speed =67Mhz

Reset Vector Location  : ROM Bank A
Mezzanine Configuration: Single-MPU
Current 60X-Bus Master : MPU0
Idle MPU(s)            : NONE

System Memory: 32MB, ECC Enabled (ECC-Memory Detected)
L2Cache:       NONE

SelfTest/Boots about to Begin... Press <BREAK> at anytime to Abort ALL

NetBoot about to Begin... Press <ESC> to Bypass, <SPC> to Continue

Network Booting from: DEC21140, Controller 0, Device 0
Device Name: /pci@80000000/pci1011,9@e,0:0,0
Loading: /tftpboot/vmlinuz.2300

Client IP Address      =
Server IP Address      =
Gateway IP Address     =
Subnet IP Address Mask =
Boot File Name         = /tftpboot/vmlinuz.2300
Argument File Name     =

Network Boot File load in progress... To abort hit <BREAK>

Bytes Received =&712708, Bytes Loaded =&712708
Bytes/Second   =&237569, Elapsed Time =3 Second(s)

Residual-Data Located at: $01F88000
loaded at:     00005400 0001C220
relocated to:  00800000 00816E20
board data at: 01F88000 01F8EA0C
relocated to:  00810314 00816D20
zimage at:     00010400 000B1235
relocated to:  00817000 008B7E35
avail ram:     00400000 00800000

Linux/PPC load: root=/dev/nfs nfsroot=
Uncompressing Linux...done.
Now booting the kernel
PReP architecture
Total memory = 32MB; using 128kB for hash table (at c01a0000)
Linux version 2.2.15pre3 (root@drow.res.cmu.edu) (gcc version 2.95.2
19991109 (D
ebian GNU/Linux)) #1 Tue Feb 8 17:24:45 EST 2000
Boot arguments: root=/dev/nfs nfsroot=
OpenPIC Version 1.2 (2 CPUs and 16 IRQ sources) at fc000000
OpenPIC timer frequency is 8333656 Hz
time_init: decrementer frequency = 999983400/60 (15MHz)
Calibrating delay loop... 209.72 BogoMIPS
Memory: 30616k available (1064k kernel code, 980k data, 108k init)
Dentry hash table entries: 4096 (order 3, 32k)
Buffer cache hash table entries: 32768 (order 5, 128k)
Page cache hash table entries: 8192 (order 3, 32k)
POSIX conformance testing by UNIFIX
PCI: Probing PCI hardware
Setting PCI interrupts for a "MVME 2300"
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Unix domain sockets 1.0 for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
TCP: Hash tables configured (ehash 32768 bhash 32768)
Starting kswapd v 1.5
pc_keyb: controller jammed (0xFF).
pc_keyb: controller jammed (0xFF).
    1 or 2 mn !!!!
pc_keyb: controller jammed (0xFF).
pc_keyb: controller jammed (0xFF).
Keyboard timed out[1]
Keyboard timeout[2]
 MANY_PORTS enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
pty: 256 Unix98 ptys configured
Real Time Clock Driver v1.09
Macintosh non-volatile memory driver v1.0
RAM disk driver initialized:  16 RAM disks of 4096K size
loop: registered device at major 7
W82C105: IDE controller on PCI bus 00 dev 59
W82C105: 100% native mode on irq 16
    ide0: BM-DMA at 0xfffffc0-0xfffffc7, BIOS settings: hda:pio, hdb:pio
SL82C105 command word: 5
IDE timing: 00000909, resetting to PIO0 timing
IDE control/status register: 00ff0091
hda: no response (status = 0xff), resetting drive
hda: no response (status = 0xff)
hdb: no response (status = 0xff), resetting drive
hdb: no response (status = 0xff)
hda: no response (status = 0xff), resetting drive
hda: no response (status = 0xff)
hdb: no response (status = 0xff), resetting drive
hdb: no response (status = 0xff)
Floppy drive(s): fd0 is 2.88M
floppy0: no floppy controllers found
scsi : 0 hosts.
scsi : detected total.
pcnet32.c: PCI bios is present, checking for devices...
eth0: DC21140 at 0xfffdf80 (PCI bus 0, device 14), h/w address
      and requires IRQ18 (provided by PCI BIOS).
de4x5.c:V0.544 1999/5/8 davies@maniac.ultranet.com
VFS: Cannot open root device 00:00
Kernel panic: VFS: Unable to mount root fs on 00:00
Rebooting in 180 seconds..

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