linux-kernel - Unable to mount root fs on unknown-block(1,0)

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Message-ID: <4622FA61.4000901@alcatel-lucent.com>
Date:	Mon, 16 Apr 2007 12:24:01 +0800
From:	gshan <gshan@...atel-lucent.com>
To:	linux-kernel@...r.kernel.org
Subject: Unable to mount root fs on unknown-block(1,0)

Hi Folks,

I got problem to boot linux 2.6.25 using u-boot-1.1.4, any ideas?

-------------------------

U-Boot 1.1.4 (Apr 14 2007 - 00:57:01)

CPU:   XPC850xxZTB at 50 MHz: 2 kB I-Cache 1 kB D-Cache
Board: ### No HW ID - assuming TQM8xxL
DRAM:   8 MB
FLASH:  4 MB
In:    serial
Out:   serial
Err:   serial
Net:   SCC ETHERNET
Hit any key to stop autoboot:  0
Using SCC ETHERNET device
TFTP from server 90.0.0.1; our IP address is 90.0.0.2
Filename 'uImage'.
Load address: 0x100000
Loading: #################################################################
         #################################################################
         ################################
done
Bytes transferred = 825541 (c98c5 hex)

=> printenv
bootdelay=5
baudrate=9600
loads_echo=1
ethact=SCC ETHERNET
netmask=0xff000000
vlan=0xffff
nvlan=0xffff
clocks_in_mhz=1
bootcmd=tftp 0x100000 uImage
autostart=no
filesize=c98c5
fileaddr=100000
ipaddr=90.0.0.2
serverip=90.0.0.1
bootargs=root=/dev/ram rw
stdin=serial
stdout=serial
stderr=serial

Environment size: 293/16380 bytes
=> bdinfo
memstart    = 0x00000000
memsize     = 0x00800000
flashstart  = 0x10000000
flashsize   = 0x00400000
flashoffset = 0x00021000
sramstart   = 0x00000000
sramsize    = 0x00800000
immr_base   = 0xFFF00000
bootflags   = 0x00000001
intfreq     =     50 MHz
busfreq     =     50 MHz
ethaddr     = 00:00:00:00:00:00
IP addr     = 90.0.0.2
baudrate    =   9600 bps

=> tftp 0x200000 aaa
Using SCC ETHERNET device
TFTP from server 90.0.0.1; our IP address is 90.0.0.2
Filename 'aaa'.
Load address: 0x200000
Loading: #
done
Bytes transferred = 776 (308 hex)
=> bootm 0x100000 0x200000
## Booting image at 00100000 ...
   Image Name:   Linux-2.6.15
   Created:      2007-04-15  16:56:44 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    825477 Bytes = 806.1 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 00200000 ...
   Image Name:   ramdisk
   Created:      2007-04-15  17:31:31 UTC
   Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
   Data Size:    712 Bytes =  0.7 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Ramdisk to 007b8000, end 007b82c8 ... OK
Linux version 2.6.15 (root@...alhost.localdomain) (gcc version 4.0.0 
(DENX ELDK 4.0 4.0.0)) #182 Mon Apr 16 00:56:43 CST 2007
Built 1 zonelists
Kernel command line: root=/dev/ram rw
PID hash table entries: 64 (order: 6, 1024 bytes)
50
Decrementer Frequency = 187500000/60
Console: colour dummy device 80x25
Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)
Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
Memory: 6236k available (1408k kernel code, 364k data, 84k init, 0k highmem)
Mount-cache hash table entries: 512
checking if image is initramfs...it isn't (no cpio magic); looks like an 
initrd
Freeing initrd memory: 0k freed
NET: Registered protocol family 16
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
Generic RTC Driver v1.07
Serial: CPM driver $Revision: 0.01 $
ttyCPM0 at MMIO 0xfff00a80 (irq = 20) is a CPM UART
RAMDISK driver initialized: 2 RAM disks of 1024K size 1024 blocksize
loop: loaded (max 8 devices)
eth0: CPM ENET Version 0.2 on SCC1, 00:00:00:00:00:00
NET: Registered protocol family 2
IP route cache hash table entries: 128 (order: -3, 512 bytes)
TCP established hash table entries: 512 (order: -1, 2048 bytes)
TCP bind hash table entries: 512 (order: -1, 2048 bytes)
TCP: Hash tables configured (established 512 bind 512)
TCP reno registered
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
RAMDISK: Compressed image found at block 0
Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(1,0)
 <0>Rebooting in 180 seconds..

Thanks,
Gavin

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