[U-Boot] having trouble booting a simple kernel on a TQM860 board

[Robert P. J. Day <rpjday@crashcourse.ca>]

On Fri, 2 Dec 2011, Scott Wood wrote:

> On 12/02/2011 05:19 PM, Robert P. J. Day wrote:
> >   and, at this point, i would think that all i need to do is:
> >
> > => bootm 400000
> > ## Booting image at 00400000 ...
> >    Image Name:   Linux-2.6.37
> >    Created:      2011-12-02  23:08:06 UTC
> >    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
> >    Data Size:    1301506 Bytes =  1.2 MB
> >     Load Address: 00000000
> >    Entry Point:  00000000
> >    Verifying Checksum ... OK
> >    Uncompressing Kernel Image ... OK
>
> You need to use a cuImage, just as you did with lite5200.

  i believe i've solved this issue, at least.  i downloaded ELDK 4.2
and installed the ppc_8xx- toolchain.  with that, i managed to compile
u-boot 2010.12 and flashed it to my TQM860, reset and, lo and behold,
i have a 2010.12 u-boot.  so my u-boot issue seems to be resolved.

> Or update U-Boot and pass a device tree.
>
> > and that's where it hangs.
> >
> >   i have no idea if it's still booting properly but i've simply
> > screwed up the serial port setting.
> >
> >   does this set of steps look reasonable?  the configuration, the
> > building, the TFTP, the verification steps, the "bootm" command?  this
> > is what's printed when the board resets:
> >
> > U-Boot 0.4.0 (Apr 13 2004 - 15:01:22)
> >
> > CPU:   XPC860xxZPnnD4 at 80 MHz: 16 kB I-Cache 8 kB D-Cache FEC
> > present
> > Board: TQM860LDB0A3-P80.208
> > DRAM:  16 MB
> > FLASH:  8 MB
> > In:    serial
> > Out:   serial
> > Err:   serial
> > Net:   SCC ETHERNET [PRIME], FEC ETHERNET
> > PCMCIA:   No Card found
> >
> >   am i just missing something obvious?  what should i use for the
> > kernel console setting?  i'm open to suggestions.
>
> console=ttyCPM0

  ok, i'm still having trouble getting a bootable kernel so here's
what i did.  using 2.6.37 version of kernel source, i followed your
advice and first just configured for the 860 with:

  $ make ARCH=powerpc tqm8xx_defconfig

then

  $ make ARCH=powerpc uImage

which generated a uImage file.  but as i understand it, i want a
cuImage-format file as i used with my lite5200, so i edited the file
arch/powerpc/boot/wrapper (as you suggested) and made the following
change:

case "$platform" in
*-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc|*-tqm8xx)
                                            ^^^^^^^^^ added

which now allows me to do the following:

  $ make ARCH=powerpc cuImage.tqm8xx

and it's my understanding that this is the file i'll TFTP down to the
TQM860 board and boot, correct?

  here's a look at that file:

$ mkimage -l /var/lib/tftpboot/cuImage.tqm8xx
Image Name:   Linux-2.6.37
Created:      Sun Dec  4 20:51:56 2011
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    1258640 Bytes = 1229.14 kB = 1.20 MB
Load Address: 0x00400000
Entry Point:  0x0040055C
$

  look reasonable?  so i download to the board to address 200000,
check it:

=> imi 200000

## Checking Image at 00200000 ...
   Legacy image found
   Image Name:   Linux-2.6.37
   Created:      2011-12-05   1:51:56 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1258640 Bytes = 1.2 MiB
   Load Address: 00400000
   Entry Point:  0040055c
   Verifying Checksum ... OK
=>

but at this point, any attempt to "bootm 200000" gives me (as before):

## Booting kernel from Legacy Image at 00200000 ...
   Image Name:   Linux-2.6.37
   Created:      2011-12-05   1:51:56 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1258640 Bytes = 1.2 MiB
   Load Address: 00400000
   Entry Point:  0040055c
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

immediately followed by a long line of diamonds with question marks
inside them.  i would assume i've just screwed up the console setting,
but i've tried various combinations of tty0, ttyS0 and ttyCPM0, with
different baud rates.  any hint as to what i should be looking at?

  i suspect i'm close, i just have this last issue to deal with.
thanks.

rday