Re: Trouble booting Kernel 2.6.12 on powerpc 8540

On Aug 4, 2006, at 8:54 AM, Prashant Yendigeri wrote:

Hi,

I am able to boot linux kernel 2.6.12 on ppc 8540, and also able to =20=

login too. But then i am unable to see any output  when i say ls, =20
mount,ifconfig etc. Only pwd and env seem to work
Whereas if i boot with kernel 2.4.20 and with the same ramdisk =20
which i used to boot 2.6.12, i am able to see eveything, ls, mount =20
outputs etc.

Do you have console=3DttyS0 on the command line to the kernel?

- kumar

I built the ramdisk image using busybox 1.2

This is the boot messages of 2.6.12 :
## Booting image at 01000000 ...
   Image Name:   Linux-2.6.12
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1177413 Bytes =3D  1.1 MB
   Load Address: 00000000
   Entry Point:  000000000
   Verifying ksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 01200000 ...
   Image Name:   MPC85xx ramdisk
   Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
   Data Size:    5887861 Bytes =3D  5.6 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Ramdisk to 0fa16000, end 0ffb3775 ... OK
mpc8540ads_init(): exit
id mach(): done
MMU:enter
MMU:hw init
MMU:mapin
MMU:setio
MMU:exit
setup_arch: enter
setup_arch: bootmem
mpc8540ads_setup_arch()
arch: exit
openpic: enter
             r      ...?.?....=C9=A5?..)55?....?.?..???)5?
] class_hotplug - name =3D ttyw8
[    2.126538] Generic RTC Driver v1.07
[    2.127108] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, =20=

IRQ sharind[    2.130813] ttyS0 at MMIO 0xe0004500 (irq =3D 26) is a =20=

16550A
[    2.152265] ttyS1 at MMIO 0xe0004600 (irq =3D 26) is a 16550A
[    2.158526] io scheduler noop registered
[    2.162574] io scheduler anticipatory registered
[    2.167318] io scheduler deadline registered
[    2.171730] io scheduler cfq registered
[    2.182339] RAMDISK driver initialized: 16 RAM disks of 32768K =20
size 1024 ble[    2.193524] loop: loaded (max 8 devices)
[    2.198105] Equalizer2002: Simon Janes (simon@ncm.com) and David =20=

S. Miller )[    2.207423] tun: Universal TUN/TAP device driver, 1.6
[    2.212597] tun: (C) 1999-2004 Max Krasnyansky [off-list ref]
[    2.219737] mice: PS/2 mouse device common for all mice
[    2.225711] i2c /dev entries driver
[    2.230856] NET: Registered protocol family 2
[    2.245261] IP: routing cache hash table of 2048 buckets, 16Kbytes
[    2.252570] TCP established hash table entries: 16384 (order: 5, =20=

131072 byt)[    2.260355] TCP bind hash table entries: 16384 =20
(order: 4, 65536 bytes)
[    2.267366] TCP: Hash tables configured (established 16384 bind =20
16384)
[    2.274459] NET: Registered protocol family 1
[    2.278943] NET: Registered protocol family 17
[    2.284791] RAMDISK: Compressed image found at block 0
[    4.435668] VFS: Mounted root (ext2 filesystem).
[    4.440693] Freeing unused kernel memory: 84k init
[    4.445614] Reached here
[    4.448201] Reached here 2
[    4.451423] Reached here 3
[    4.454196] going to Exec /sbin/init
init started:  BusyBox v1.2.0 (2006.08.02-10:51+0000) multi-call =20
binary
Starting pid 682, console /dev/ttyS0: '/etc/init.d/rcS'
Starting pid 690, console /dev/ttyS0: '/sbin/ge
Welcome to Linux on MPC85xxSK board!
MPC85xxSK login:


-> After this i login as root and type ls but no output on the =20
screen, pwd and env throw output.
-> I also see that in 2.4 booting messages :"Freeing initrd =20
memory........" is displayed" but not in 2.6.12, eventhough i have =20
enabled CONFIG_BLK_DEV_INITRD
-> Should i enter something for CONFIG_INITRAMFS_SOURCE as of now =20
it is blank ?

Thanks and Regards,
Prashant



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