Greetings! Thanks to anyone who might have attempted to help out! The problem turned out to by too low SDRAM refresh interval.
Best regards, -Arun. On Tuesday 11 June 2002 03:22 pm, adharankar at attbi.com wrote: > Greetings, > > I am trying to getup a Scout based board with > 64MB SDRAM, and could use any recommendations > to fix this problem: > > If I set the refresh-enable bit in the PSDMR, > the chipselect for flash and other devices > vanishes: consequently, this startup code > ends up executing junk. At this point if I try > to look at the flash from the BDI2000, the > flash cannot be seen. > > > > On the other hand, if I initialize the SDRAM > without setting this refresh-enable bit, ppcboot > (the code using it) comes up and am able to run > commands etc. However, the problem now is that > without the SDRAM refresh we run into memory > corruption problem (mtest will fail) and a system > hang. > > Its interesting to note that as long as memory > is accessed frequently (say via mtest), the > corruption is not see at that address. Also, an > idle system almost hangs in a very short time, > whereas an active one with mtest will continue on. > > > > Best regards, > -Arun. > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
