linux booting issue

Hi,
     I am trying to boot linux-2.6.25 on mpc837x board using u-boot.
     but linux hangs with following message. Please help..

bootm 0xfc100000
*  kernel: cmdline image address = 0xfc100000
## Booting kernel from Legacy Image at fc100000 ...
   Image Name:   linux-2.6
   Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
   Data Size:    2857358 Bytes =  2.7 MB
   Load Address: 00000000
   Entry Point:  00000000
   Contents:
      Image 0: 1595336 Bytes =  1.5 MB
      Image 1: 1262010 Bytes =  1.2 MB
   Verifying Checksum ... OK
   kernel data at 0xfc10004c, len = 0x001857c8 (1595336)
   Uncompressing Multi-File Image ... OK
   kernel loaded at 0x00000000, end = 0x0031f9c0
## Current stack ends at 0x0ff41c70
## Flattened Device Tree from multi component Image at FC100000
## No Flattened Device Tree
## cmdline at 0x007fff00 ... 0x007fff00
## kernel board info at 0x007ffeb0
bd address  = 0x0FF41FBC
memstart    = 0x00000000
memsize     = 0x10000000
flashstart  = 0xFC000000
flashsize   = 0x04000000
flashoffset = 0x00032000
sramstart   = 0x00000000
sramsize    = 0x00000000
bootflags   = 0x00000001
intfreq     = 533.333 MHz
busfreq     = 266.666 MHz
ethaddr     = 00:00:00:00:00:00
eth1addr    = 00:04:9F:EF:04:02
IP addr     = 10.0.0.2
baudrate    = 115200 bps
## Loading init Ramdisk from multi component Legacy Image at fc100000 ...
   ramdisk start = 0xfc285814, ramdisk end = 0xfc3b99ce
## initrd_high = 0xffffffff, copy_to_ram = 1
   Loading Ramdisk to 0fe0d000, end 0ff411ba ... OK
   ramdisk load start = 0x0fe0d000, ramdisk load end = 0x0ff411ba
## Transferring control to Linux (at address 00000000) ...






	   
					
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On 06/22/2010 04:16 AM, patwardhan wrote:
> Hi,
>       I am trying to boot linux-2.6.25 on mpc837x board using u-boot.
>       but linux hangs with following message. Please help..
>
> bootm 0xfc100000
> *  kernel: cmdline image address = 0xfc100000
> ## Booting kernel from Legacy Image at fc100000 ...
>     Image Name:   linux-2.6
>     Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
>     Data Size:    2857358 Bytes =  2.7 MB
>     Load Address: 00000000
>     Entry Point:  00000000
>     Contents:
>        Image 0: 1595336 Bytes =  1.5 MB
>        Image 1: 1262010 Bytes =  1.2 MB
>     Verifying Checksum ... OK
>     kernel data at 0xfc10004c, len = 0x001857c8 (1595336)
>     Uncompressing Multi-File Image ... OK
>     kernel loaded at 0x00000000, end = 0x0031f9c0
> ## Current stack ends at 0x0ff41c70
> ## Flattened Device Tree from multi component Image at FC100000
> ## No Flattened Device Tree
> ## cmdline at 0x007fff00 ... 0x007fff00
> ## kernel board info at 0x007ffeb0
> bd address  = 0x0FF41FBC
> memstart    = 0x00000000
> memsize     = 0x10000000
> flashstart  = 0xFC000000
> flashsize   = 0x04000000
> flashoffset = 0x00032000
> sramstart   = 0x00000000
> sramsize    = 0x00000000
> bootflags   = 0x00000001
> intfreq     = 533.333 MHz
> busfreq     = 266.666 MHz
> ethaddr     = 00:00:00:00:00:00
> eth1addr    = 00:04:9F:EF:04:02
> IP addr     = 10.0.0.2
> baudrate    = 115200 bps
> ## Loading init Ramdisk from multi component Legacy Image at fc100000 ...
>     ramdisk start = 0xfc285814, ramdisk end = 0xfc3b99ce
> ## initrd_high = 0xffffffff, copy_to_ram = 1
>     Loading Ramdisk to 0fe0d000, end 0ff411ba ... OK
>     ramdisk load start = 0x0fe0d000, ramdisk load end = 0x0ff411ba
> ## Transferring control to Linux (at address 00000000) ...

Disclaimer: I'm no embedded Linux expert...

That last message looks like the boot loader is signing off, and is 
about to jump to the Linux image.  Either your Linux kernel is hosed -- 
early, before it gets a chance to say anything -- or there's something 
wrong with your setup.

Keeping in mind that I know nothing, is the Linux kernel _really_ 
supposed to start up at address 0x00000000?  The bottom mumble-mumble 
kilobytes of memory in a PowerPC is exception-handler-land.  Unless the 
image is designed to run from flash without a loader (0x00000000 is the 
reset exception handler address) that's not a good place for it to be.

Do you have _any_ embedded Linux system that works?  Comparing it's boot 
process with this one would be informative, particularly if it's also a 
PowerPC.

-- 
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com

patwardhan wrote:
>      I am trying to boot linux-2.6.25 on mpc837x board using u-boot.
>      but linux hangs with following message. Please help..
> 
> bootm 0xfc100000
> *  kernel: cmdline image address = 0xfc100000
> ## Booting kernel from Legacy Image at fc100000 ...
>    Image Name:   linux-2.6
>    Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
>    Data Size:    2857358 Bytes =  2.7 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Contents:
>       Image 0: 1595336 Bytes =  1.5 MB
>       Image 1: 1262010 Bytes =  1.2 MB
>    Verifying Checksum ... OK
>    kernel data at 0xfc10004c, len = 0x001857c8 (1595336)
>    Uncompressing Multi-File Image ... OK
>    kernel loaded at 0x00000000, end = 0x0031f9c0
> ## Current stack ends at 0x0ff41c70
> ## Flattened Device Tree from multi component Image at FC100000
> ## No Flattened Device Tree
     ^^^^^^^^^^^^^^^^^^^^^^^^
Does your kernel uses arch 'powerpc' or 'ppc'? If 'powerpc' you will need a
device tree. Without it the kernel has no clue about the system it is
running on.

jbe