Hi Raffaele,
Thanks for the suggestion.
(1) Console is fine. I am able to communicate with the u-boot (115200,n8).
Also if I use printascii (a kernel function) I am able to output on console.
(2) There is no message, after the kernel decompression (because console is
not up). Here is what I see.
Load address: 0x82000000
Loading: ####T ###################T
##########################################
##################################################################
######################T
############################################
#################################################################
###################T
##############################################T ##
######T ########################################
done
Bytes transferred = 1898828 (1cf94c hex)
## Booting image at 82000000 ...
Image Name: Linux-2.6.32-rc2-davinci1
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1898764 Bytes = 1.8 MB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
OK
Starting kernel ...
Uncompressing
Linux...........................................................................................................................
done, booting the kernel.
/* AND THEN NOTHING BECAUSE CONSOLE IS NOT FUNCTIONAL, but booting goes on
*/
Regards,
kunal
On Wed, Sep 29, 2010 at 5:38 PM, Raffaele Recalcati
<[email protected]>wrote:
> On Wed, Sep 29, 2010 at 4:48 AM, kunal singh <[email protected]>
> wrote:
> > Hi,
> >
> > MY SETUP
> > -----------------
> > We have a dm6446 based board & we have been using 2.6.18 (MV) Linux.
> > Recently I tried upgrading to kernel 2.6.32 (PSP 03.01).
> >
> > PROBLEM
> > -------------------
> > When the kernel boots I can not see any boot messages on the serial
> > console. I assume that if the boot flow passes beyond console_init (in
> > init/main.c) I should start to receive printk messages on the console.
> But
> > it does not happen so.
> >
> > ADDITIONAL INFORMATION
> > ---------------------
> > (1) If use the printascii function (low level debug print) in the
> > init/main.c, I can get messages on serial console. So, I assume that
> nothing
> > is wrong with hardware.
> > (2) The command line arguments (printed from kernel using printascii)
> > show that console=ttyS0,115200n8
> >
> > Any idea what could be wrong?
>
> First
> Check your setup.
> I mean, with the same PC and serial port cable you can read and write
> to another device with 115200n8 comfiguration?
>
> Second
> You need to copy, in the mail, every messages you have on the serial
> line, from power up
>
> Third
> Check info here http://processors.wiki.ti.com/index.php/Category:DM644x
>
> Good work,
> Raffaele
>
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