Sun, On Wednesday 15 April 2009, SunNeo wrote: > I tried to add auto-calibration related configuration to my configuation > file, but Linux still hangs at the same location. It seems error happened > when threads of Linux Kernel tried to access the high 512m memory.
I suggest you debug this further, either by adding some printk's or using a debugger to see where exactly the crash happens. > Just like the Kilauea evb, there is no ECC on my board, and I use the same > regisger setting for DDR Controller as Kilauea. Maybe you know, Kilauea > uses the "MT47H64M16HR" DDRII SDRAM and only one rank. My board uses the > "MT47H256M8THN" and two ranks. So, I changed setting of MB0CF & MB1CF. When using the 2nd rank you need to change the termination settings as well (SDRAM0_MODT0, SDRAM_MODT1, SDRAM0_CODT). Using the original values from Kilauea is definitely a problem which could lead to all kind of problems. > I think I can confirm all 1024M memory can work well at U-Boot. Again, you don't really know if the whole memory is working correctly just because you are able to boot to the U-Boot prompt. Intensive memory tests (with and without burst access) are necessary here. > And if I > add the parameter "mem=512M" to bootargs, and set "initrd_high" to > "20000000", Linux can boot normally. Understood. I still think that this is a problem with incorrect SDRAM configuration. Take a look at the termination registers mentioned above and configure them correctly. Best regards, Stefan ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [email protected] ===================================================================== _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
