[U-Boot-Users] RAMDISK image in flash not getting mounted - Memec Powerpc405 board

Shamile Khan shamile at yahoo.com
Thu Nov 6 22:33:06 CET 2003


I tried pRamdisk for ppc_4xxFP and ppc_4xx. I am not sure
of the difference between ppc_4xxFP and ppc_4xx. But just a
heads up. With ppc_4xxFP, I get the same results as for the
Simple Ramdisk-Image I used before i.e. after the boot
process I get no prompt on the screen. 
VFS: Mounted root (ext2 filesystem). 

With ppc_4xx, I get these messages

Freeing unused kernel memory: 52k init
serial console detected.  Disabling virtual terminals.
Oops: kernel access of bad area, sig: 11
NIP: C00112C8 XER: 00000000 LR: C00112AC SP: C19CFF10 REGS:
c19cfe60 TRAP: 0800    Not tainted
MSR: 00009030 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DEAR: 39600410, ESR: 00000000
TASK = c19ce000[12] 'xinetd' Last syscall: 3
last math 00000000 last altivec 00000000
GPR00: ED0001FE C19CFF10 C19CE000 00009030 00001030
C0101AE8 C1E44260 00000000
GPR08: C0101AE8 09B003ED C00F8030 396003F0 00000001
10043878 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 00001032
019CFF40 00000000 C00049E0
GPR24: C000608C 10024CB0 30025ACC 10025A48 C1E86000
C0104C80 00000000 C19CFF10
Call backtrace:
0EC82E3A C0004A04 10007570 10007614 10009714 1000C134

I also have a question concerning Linux debugging with
abatron. I can set an instruction breakpoint (e.g at
start_here in the kernel) when I use a zImage.elf image but
the same breakpoint doesnt work when I use u-boot to boot
vmlinux.PPCBoot image. 


--- Wolfgang Denk <wd at denx.de> wrote:
> In message
> <20031106032345.68783.qmail at web11603.mail.yahoo.com> you
> wrote:
> > 
> > Yeah that was the problem. So now it boots all the way.
> I
> > am not sure what this Simple Ramdisk-Image is composed
> of
> > as I do not get to a promt. I get nothing on the
> terminal.
> This old MPC8xx-only ramdisk image is really causing more
>  harm  than
> being helpful. I removed it from the FTP server now.
> Please use instead an image that was build for a 4xx
> system.
> You can find SELF based images in
> ftp://ftp.denx.de/pub/LinuxPPC/usr/src/SELF/images/
> Best regards,
> Wolfgang Denk
> -- 
> Software Engineering:  Embedded and Realtime Systems, 
> Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88 
> Email: wd at denx.de
> Life would be so much easier if we could  just  look  at 
> the  source
> code.                                                  
> -- Dave Olson

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