Help!Some memory doesn't work on PPC405Ex based board!
sr at denx.de
Tue Apr 14 19:23:02 EST 2009
On Monday 13 April 2009, SunNeo wrote:
> I'm porting Linux-2.6.29 on PPC405Ex based board, it's very similar to AMCC
> "Kilauea" evb.
> In my board, two 512MB DDRII memory is connected to 2 ranks of the 405Ex
> CPU. This 1GB memory works well at U-Boot-2009.01, but when I boot
> Linux-2.6.29, the kernel hangs somewhere.
Does it just hang "somewhere", or always at the same location? A random hangup
could mean that you are having a memory problem (hardware, or wrong
> What interesting is, if I
> configured the system to use only 512MB memory at U-Boot, the Linux can
> boot normally.
Are you using DIMM's on your platform? Or soldered chips? Which memory
initialization code are you using in U-Boot? And which autocalibration code?
Did you do some intensive memory test?
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