Porting of Linux on MPC8260 custom build board

Porting of Linux on MPC8260 custom build board

[Heiko Schocher]

Hello Batsayan Das,

[...]
> zone(2): 0 pages.
> Kernel command line: root=/dev/mtdblock2

I think you do not use NFS as root fs.
Try something like root=/dev/nfs in the Kernel
command line, or read

http://www.denx.de/wiki/view/DULG/LinuxNfsRoot

Best regards
Heiko

Porting of Linux on MPC8260 custom build board

[batsayan.das]

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Hello,

Linux is able to uncompress into SDRAM. We mapped SDRAM from 0x0. It is
getting stuck at mounting root fs. We have mounted the root fs by NSF.
Possibly it is not able to contact the server where it's FS is mounted.
Pls find the following log and help me to bring up Linux. Our board has
single ethernet and uses FCC1 with LXT971 driver. The board does not have
BCSR.

**********************LOG START*********************

U-BOOT=> boot,\b \bm 04000000

## Booting image at 04000000 ...
   Image Name:   Linux-2.4.25
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    661935 Bytes = 646.4 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Current stack ends at 0x07B87CA8 => set upper limit to 0x00800000
## cmdline at 0x007FFF00 ... 0x007FFF13
bd address  = 0x07B87FB4
memstart    = 0x00000000
memsize     = 0x08000000
flashstart  = 0xFE000000
flashsize   = 0x00100000
flashoffset = 0x00032000
sramstart   = 0xFFF00000
sramsize    = 0x00200000
immr_base   = 0xF0000000
bootflags   = 0x00000001
vco         =    248 MHz
sccfreq     =     62 MHz
brgfreq     = 15.500 MHz
intfreq     =    186 MHz
cpmfreq     =    124 MHz
busfreq     =     62 MHz
ethaddr     = 00:0B:17:00:00:00
IP addr     = 172.18.16.220
baudrate    =  57600 bps
No initrd
## Transferring control to Linux (at address 00000000) ...
Memory BAT mapping: BAT2=128Mb, BAT3=0Mb, residual: 0Mb
Linux version 2.4.25 (cdot@myserver.com) (gcc version 3.3.3 (DENX ELDK
3.1.1 3.3.3-9)) #3 Wed Jan 4 15:48:00 IST 2006
On node 0 totalpages: 32768
zone(0): 32768 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/mtdblock2
Warning: real time clock seems stuck!
Calibrating delay loop... 123.69 BogoMIPS
Memory: 127932k available (1136k kernel code, 400k data, 52k init, 0k
highmem)
Dentry cache hash table entries: 16384 (order: 5, 131072 bytes)
Inode cache hash table entries: 8192 (order: 4, 65536 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 8192 (order: 3, 32768 bytes)
Page-cache hash table entries: 32768 (order: 5, 131072 bytes)
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
JFFS2 version 2.2. (C) 2001-2003 Red Hat, Inc.
CPM UART driver version 0.01
ttyS0 on SMC1 at 0x0000, BRG7
ttyS1 on SMC2 at 0x0040, BRG8
ttyS2 on SCC1 at 0x8000, BRG1
ttyS3 on SCC2 at 0x8100, BRG2
pty: 256 Unix98 ptys configured
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 1024 buckets, 8Kbytes
TCP: Hash tables configured (established 8192 bind 16384)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Cannot open root device "mtdblock2" or 1f:02
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 1f:02
 <0>Rebooting in 180 seconds..
***************************LOG END*******************************

Thanks
Batsayan Das


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Re: Porting of Linux on MPC8260 custom build board

[Sinan Akman]

batsayan.das@tcs.com wrote:

>
> [...] We have mounted the root fs by NSF.

    Really ? The following boot command says you intended otherwise !

> Kernel command line: root=/dev/mtdblock2

    [...]

> Please append a correct "root=" boot option

    Indeed ! Provide the correct root option to mount over nfs.

    Denx FAQ covers all these.

    Regards

    Sinan Akman