[U-Boot-Users] problems with serial console

Suresh Chandra Mannava msuresh at gamebox.net
Thu Jan 20 18:54:15 CET 2005


I had successfully ported u-boot-1.1.1 for MPC8260 based custom SBC. 
Every thing is fine.
I want to thank Mr. Wolfgang Denk and all the people who contributed to 

My interested is to boot Linux on this board. I downloaded linux-2.6.6.
I followed EST8260 board in the kernel and made changes accordingly for 
my board.

I did not add board define in  "arch/ppc/boot/simple/embed_config.c"  
because u-boot-1.1.1 passes clock speed in
Hz and so as the kernel versions from 2.4.5 (DULG FAQ) accepts in Hz.

After successful compilation. I tried to boot the kernel. Here I am 
encountering problem with serial console.

We are using serial port on SMC

u-boot baud rate is set at 115200. I am using hyper terminal for serial 

Before booting the kernel, my display is ok. I can interact with the 
console normally
After uncompressing the image and before loading the Linux.
Many characters are skipped, And display can not be interpreted.

I tried to change the baud rate using "setenv baud rate 9600". But 
u-boot in hanging.

I am pasting the text capture for your reference.

kindly help in overcoming this Issue. Does  reducing baud rate helps?

   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

n ro2.(rhus cvso .. 0327(elwDgLnx303222_) 3TuJn2 00:0IT20
Cre ehSC20Pr
O oe0ttlae:378  M oe 26 ae,LF ac:
 Nra oe  ae,LF ac:
 HgMmzn:0pgs IObth1 ul  oeit
Kre omn ie osl=tS,120cnoety ot/e/a w I ahtbeetis 04(re 0 12bts
Wrig eltm lc em tc!Mmy13kvll(0kn d 4kdt,5kii,0 ihe)
lri l o...91oMSerchhhaeni:64(re:4 53 ye)neaea b te 12(re:3 26 ye)otaea 
al nre:52(re:0 06bts
S nrn sigb NFXccniigi iaststncoac o kaitd
enit my4krdixoT0oLu26
cthovalmo ir1
RMSdv iaz:6Adko49Ksz 04bokie

Thanks in advance.

Suresh Chandra Mannava.

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