kernel boot on mpc8245

Hi,
I have a board which is close to Sandpoints mpc8245 cpu board. (using internal DUARTs, EPIC_MODE_SERIAL)

Trying to get it working, I got until:

Filename 'pImage'.
Load address: 0x1000000
Loading: ################################T ###################T
##############

         ###T
##############################################################
         ##T #########################

done
Bytes transferred = 801369 (c3a59 hex)
=> bootm 1000000
## Booting image at 01000000 ...

   Image Name:   Linux-2.4.20
   Created:      2003-03-04  23:57:29 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    801305 Bytes = 782 kB = 0 MB

Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
id mach(): done
MMU:enter
MMU:hw init
MMU:mapin
MMU:mapin_ram done
MMU:setio
MMU:exit
setup_arch: enter
setup_arch: bootmem
mpc10x:enter
mpc10x:exit
arch: exit
openpic: enter
openpic: timer
openpic: external
openpic: spurious
openpic: exit

then it stops. Any idea what it is waiting for ?

And another question, I don't see any of the "printk ()" outputs I put in the code, did I missed a flag ?

Cheers & thanks for any help

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Hi,

I was some experience for similar problem on past time. It was happened on kernel porting process (to other board).
For my problem, It caused by ppc_md.calibrate_decr = todc_calibrate_decr; . i forgot to initialize external real time clock( so rtc was stopped). that means it does not work and stop on same point.... If you use another calibrate_decr (based on bus clock or another clock), maybe it caused by other problem...

Best Regards,
Yuji Nishimura - Tokyo, Japan.

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My recommendation for a first step is to look at your printk data. You didn't miss a flag, you're simply crapping out before the console is set up to dump out the printk data.

Go into the System.map file associated with the kernel your running, search for 'log_buf', subtract 0xc0000000 to get the physical addr of 'log_buf', hook up a BDI or something similar (and hopefully, your board has an appropriate connector), and dump the [printk] data at that address.

Mark
--

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I have the connector, but not a BDI2000 :(

And the log_buf ends with:

0019f544: 20617263 682c2062 65666f72 65206669 arch, before fi

0019f554: 6e645f62 72696467 6573200a 3c363e45    nd_bridges .<6>E
0019f564: 63756275 65726f20 50383234 35205369    cubuero P8245 Si
0019f574: 6e676c65 20426f61 72642043 6f6d7075    ngle Board Compu
0019f584: 7465720a 3c363e50 6f727420 62792065    ter.<6>Port by e
0019f594: 6d750a3c 343e4f6e 206e6f64 65203020    mu.<4>On node 0
0019f5a4: 746f7461 6c706167 65733a20 33323736    totalpages: 3276
0019f5b4: 380a3c34 3e7a6f6e 65283029 3a203332    8.<4>zone(0): 32
0019f5c4: 37363820 70616765 732e0a3c 343e7a6f    768 pages..<4>zo
0019f5d4: 6e652831 293a2030 20706167 65732e0a    ne(1): 0 pages..
0019f5e4: 3c343e7a 6f6e6528 32293a20 30207061    <4>zone(2): 0 pa
0019f5f4: 6765732e 0a3c343e 4b65726e 656c2063    ges..<4>Kernel c
0019f604: 6f6d6d61 6e64206c 696e653a 20636f6e    ommand line: con
0019f614: 736f6c65 3d747479 53302c31 31353230    sole=ttyS0,11520
0019f624: 3020636f 6e736f6c 653d7474 79302072    0 console=tty0 r
0019f634: 6f6f743d 2f646576 2f72616d 2072770a    oot=/dev/ram rw.
0019f644: 00000000 00000000 00000000 00000000    ................

Cheers & thanks

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Trying to figure out what is going wrong, I tried to locate the driver for the internal DUART of the MPC8245 ...

So, probably a stupid question, but where is the link/information, or where do I provide it, that the MPC8245 should use the internal UART as a console on linux ?

Thanks a lot in advance, but I guess I got lost ...

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