[U-Boot-Users] prob. faced in UBoot with 64MB SDRAM
nethra_gmit at yahoo.co.in
Tue Apr 10 14:32:18 CEST 2007
I m using U-Boot 1.1.2 for custom board similar to MPC8272ADS board.
On board it has 64MB Micron SDRAm and 16MB AMD flash.
When Uboot is configured for 16MB SDRAM it works fine.
A)But the same Uboot after doing necessary changes in OR1 to configure it
for 64MB SDRAM.it fails to comeup properly.
So for 16MB
and other SDRAM register value remain the same
when we debugged the Uboot through BDI we found that it always hangs after
relocating the code in SDRAM.
but we ar not sure what could be the reason.....
B) Also we found that same uboot for second board with same SDRAM and FLASH
it comes up properly.
And after configuring boot arguements environment variables.It will download
the kermel image
and after uncompressing kernel image and mount NFS properly.
But when the root prompt comes board will get reset and again start
and this get repeated in a loop.
C) One more observation on the second board where uboot comes up properly
and kernel +Ramdisk boot arguments are configured.
both kernel +Ramdisk image will be copied from tftp and start executing
properly without any problem.
As far as HW is concerned both the board is same w.r.t to components
kindly help in this respect with possible solution.
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