[U-Boot-Users] U-boot AMCC yosemite board 440EP

[Föll, Tobias]

Hi,

i have a hardware which is very near to the yosemite board called JC-670.
The yosemite board has 4 DDR chips and my hardware has only two chips (2*Micron 64V16M16 has 256Mbit...),
because i need only 256MBit*2Chips=512MBit=64Mbyte.

It seem that i have problems with the DDR interface. 
I downloaded the u-boot bin file from the AMCC -> denx page, and programmed it into
the flash on my hardware called JC-670.
On the serial output i saw that the system starts up. But then it hangs...

Here is the first output hardware JC-670:
===========================================
U-Boot 1.1.4-ga2c95a72 (Jul 28 2006 - 19:32:28)

CPU:   AMCC PowerPC 440EP Rev. B at 666.666 MHz (PLB=266, OPB=133, EBC=133 MHz)
       I2C boot EEPROM enabled
       Internal PCI arbiter disabled, PCI async ext clock used
       32 kB I-Cache 32 kB D-Cache
Board: Yosemite - AMCC PPC440EP Evaluation Board
I2C:   ready
DRAM:

Software has not detected the DRAM !

Here is the second output hardware JC-670:
==========================================

U-Boot 1.1.4-ga2c95a72 (Jul 28 2006 - 19:32:28)

CPU:   AMCC PowerPC 440EP Rev. B at 666.666 MHz (PLB=266, OPB=133, EBC=133 MHz)
       I2C boot EEPROM enabled
       Internal PCI arbiter disabled, PCI async ext clock used
       32 kB I-Cache 32 kB D-Cache
Board: Yosemite - AMCC PPC440EP Evaluation Board
I2C:   ready
DRAM:  256 MB

U-boot software has detected the DRAM's.



I can try this several times the difference is that sometimes i got the DRAM size(like first output) and somtimes not (like second output).
Thats all. Must i change the u-boot code if i only use two DDR Chips ?

On the moment i can not generate a new u-boot bin , because it will not work with cygwin under windows.I tried it. 
And i'am not a linux expert, because of this i can not do this work under linux on the moment.

Has anybody an idea why sometimes the "256 MB" text will not come ?

For me it looks like the sdram_init() function in yosemite.c sometimes hangs.

Regards

Tobias