I am bringing u-boot-2009.03-rc1 up on an MPC8536 target, and I am having some problems reading DDR, suggestions would be greatly appreciated. I am using this particular u-boot, because the client succeeded in getting that working on an MPC8536DS (that I do not have access to). I can not even get the serial port working on the target with newer versions of u-boot. This target is much simpler than the MPC8526DS and I have disabled everything but Serial, DDR, and NOR in the board configuration file. The only thing that must work is booting linux. This board has no PIXIS, no ISC307, and the DDR does not have SPD. I now appear to have everything but DDR working. I can not get u-boot to relocate to ram. Writing to RAM seems to work - in the sense there are no faults and writes do not hang, but reading RAM stalls the instruction forever without error. I am using a BDI3000 - which I am not fluent in. The BDI3000 configuration is minimal - only enough to read/write/erase NOR, and manipulate the processor. The BDI3000 faults when reading DDR - but it is not setup for that. The MPC8536DS code to setup DDR without SPD would not compile as it was, but I beleive I have fixed that. I have played with myriads of DDR controller register value changes without change in behavior. As this is a total read failure - rather than just unreliable operation I am leaning towards looking for other culprits - though the DDR configuration is still high on the list as u-boot works ont he development system and the remaining difference of consequence is that the DDR is manually programmed on the target. Access to the hardware is severely limited - it is two hours away in a secure facility, and I must try as much as possible during the limited time I have access.
-- Dave Lynch DLA Systems Software Development: Embedded Linux 717.587.7774 dh...@dlasys.net http://www.dlasys.net Over 25 years' experience in platforms, languages, and technologies too numerous to list. "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction." Albert Einstein _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
