[U-Boot-Users] Exception occurs while uncompressing linux kernel

[U-Boot-Users] Exception occurs while uncompressing linux kernel

[Farrah Rashid]

Sometimes while uncompressing the kernel image (gunzip), an illegal instruction program exception occurs.  U-boot displays the registers, reboots, and usually doesn't have any problems loading the kernel.  I'm having a hard time debugging the cause since the problem is intermittent.  Has anyone experienced this?  Is it due to a problem with the RAM?  Any suggestions are greatly appreciated.  Thanks, Farrah.

Hit any key to stop autoboot:  0
## Booting image at 00400000 ...
   Image Name:   Linux-2.6.15 daqNet H11764D
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    739864 Bytes = 722.5 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... NIP: 07FEB04C XER: 20000000 LR:
07FEB9E0 REGS8
MSR: 00021000 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00

GPR00: 00000000 07FA4FF0 000038B0 07FCE854 00000013 00000013 00000000
07FA4FF8
GPR08: FFFFFFFA 07FA5100 07FA4FF8 00000002 07FA50B4 00004340 08004800
07FA503C
GPR16: FFFFFFFF 00000000 00000006 000B4A0D 00000000 00000002 000B4A06
00000006
GPR24: 00000007 00400052 00000005 00000000 00000000 07FA5F58 080048B0
07FA5AE0
** Illegal Instruction **
Call backtrace:
Program Check Exception

[U-Boot-Users] Exception occurs while uncompressing linux kernel

[Wolfgang Denk]

In message <11405.1182268480@magma.ca> you wrote:
> Sometimes while uncompressing the kernel image (gunzip), an illegal instruction program exception occurs.  U-boot displays the registers, reboots, and usually doesn't have any problems loading the kernel.  I'm having a hard time debugging the cause sinc
> e the problem is intermittent.  Has anyone experienced this?  Is it due to a problem with the RAM?  Any suggestions are greatly appreciated.  Thanks, Farrah.

Yes, this smells like memory problems.

BTW: please restrict your line length to the usual 70 characters or so.

Best regards,

Wolfgang Denk

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