Hi,
I decided to start tracing down the issue. I'm debugging early stage
by adding primitive debug code ( I don't have a fancy cpu debugger,
sign)
foobar:
.long 0
start_:
lis r4, foobar at h
ori r4, r4, foobar at l
li r8, 0x1111
stw r8, 0(r4)
I found that the bootelf command actually jumped to _start(), and then
stoped inside load_kernel()@arch/ppc/boot/simple/misc.c. Because of
stupid debugging method, just slow progress.
- ken
On 3/23/07, Ken Sakurai <sakurken at gmail.com> wrote:
>
> Stephen,
>
> > I don't know the AVNET 440GX eval board. Is it _identical_ to the
> IBM/AMCC
> > Ocotea? If not you will most likely have no luck with this image. You
> will
> > have to port Linux to this special board.
>
> yeah, sounds like. I was so optimistic that Linux is kind of primary OS
> for
> any ppc board when I choosed this board :-)
>
> I was just using the elf image, instead of uimage.
> '6501A8C0.img' is refereing zImage.img which is Linux elf image.
> It looks to me that the bootelf command interprets ELF format corrently.
>
> As you sugested, I also made uImage and used bootm to boot it.
> But no luck. Here is the log.
>
> => setenv bootargs "console=ttyS0,19200 console=/dev/ttyS0"
> => tftp 0x100000 uImage
> Waiting for PHY auto negotiation to complete.. done
> ENET Speed is 100 Mbps - FULL duplex connection
> Using ppc_440x_eth2 device
> TFTP from server 192.168.1.1; our IP address is 192.168.1.101
> Filename 'uImage'.
> Load address: 0x100000
> Loading: #################################################################
>
> #################################################################
> ######
> done
> Bytes transferred = 695605 (a9d35 hex)
> => bootm
> ## Booting image at 00100000 ...
> Image Name: Linux-2.6.21-rc4
> Image Type: PowerPC Linux Kernel Image (gzip compressed)
> Data Size: 695541 Bytes = 679.2 kB
> Load Address: 00000000
> Entry Point: 00000000
> Verifying Checksum ... OK
> Uncompressing Kernel Image ... OK
> (freeze at this point)
>
> - Ken
>
> On 3/23/07, Stefan Roese <sr at denx.de> wrote:
> >
> > Ken,
> >
> > On Thursday 22 March 2007 20:34, Ken Sakurai wrote:
> > > I'm trying to boot Linux on AVNET 440gx eval board but no luck so
> > far.
> > > What I did are that I downloaded a plain 2.6.20 kernel from kernel.org
> > ,
> > > configured with 440GX, OCOTEA target (I'm not sure OCOTEA is correct
> > > target),
> >
> > I don't know the AVNET 440GX eval board. Is it _identical_ to the
> > IBM/AMCC
> > Ocotea? If not you will most likely have no luck with this image. You
> > will
> > have to port Linux to this special board.
> >
> > > then loaded the kernel image via tftp and tried to boot with bootelf
> > > command.
> > > But I had no output message from Linux.
> > >
> > > I suspected setting of Linux serial console. So I changed the kernel
> > > parameter to
> > > "ttyS0,19200" which I suppose correct becuase this is the minicom
> > setting.
> > > But still didn't work.
> > >
> > > The board comes with u-boot 1.0.2 with some fixes. I'm checking the
> > u-boot
> > > source code (might be some hint in there) and the serial device
> > > initialization code in Linux.
> > >
> > > Has anyone had experiece with Linux on AVNET 440GX board?
> > > Any advise would be appreciated !
> >
> > See below.
> >
> > > -
> > > Ken
> > >
> > > ------
> > >
> > > => tftp
> > > Waiting for PHY auto negotiation to complete.. done
> > > ENET Speed is 100 Mbps - FULL duplex connection
> > > *** Warning: no boot file name; using ' 6501A8C0.img'
> >
> > Hmmmm. That's a strange image name. Normally you should boot the uImage
> > file
> > from U-Boot.
> >
> > > Using ppc_440x_eth2 device
> > > TFTP from server 192.168.1.1 ; our IP address is 192.168.1.101
> > > Filename '6501A8C0.img'.
> > > Load address: 0x100000
> > > Loading:
> > #################################################################
> >
> > > #################################################################
> > > #################################
> > > done
> > > Bytes transferred = 832121 (cb279 hex)
> > > => bootelf
> > > Loading .text @ 0x01000000 (15316 bytes)
> > > Loading .data @ 0x01004000 (700416 bytes)
> > > Clearing .bss @ 0x010af000 (8500 bytes)
> > > ## Starting application at 0x01000000 ...
> >
> > And use the "bootm" command to boot the uImage.
> >
> > Best regards,
> > Stefan
> >
> > =====================================================================
> > DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
> > Office: Kirchenstr. 5, D-82194 Groebenzell, Germany
> > =====================================================================
> >
>
>
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