Hi all, I'm making quite good progress porting U-Boot (2009.03) to my custom PPC440GX board. Right now I'm trying to solve a little problem I have with board start-up time when I enable ECC on DDR RAM. The board literally takes minutes to initialize RAM. I'm guessing this is due to the fact that ecc_init() fills the entire RAM (the comments already suggest some performance enhancements can be implemented).
I've tried solving this by shortly enabling the D cache before writing RAM and disabling the D cache afterwards, using the function change_tlb(). However, if I enable the D cache using change_tlb() and supply it with the same parameters ecc_init() receives, I get an exception when change_tlb() invalidates the cache. Commenting out that call (just to try it) solves the exception problem, but the RAM initialization time does not really seem to improve. What can I do to speed up this ECC initialization? Have I forgotten something when I try to enable the D cache? Any suggestions are welcome. Kind regards, Met vriendelijke groet, Wouter Eckhardt Engineer wouter.eckha...@prodrive.nl tel. +31 40 2676187 Prodrive B.V. Postbus 28030 5602 JA Eindhoven Ekkersrijt 5025 5692 EB Son The Netherlands tel. +31 40 2676200 fax: +31 40 2676201 www.prodrive.nl Disclaimer: The information contained in this email, including any attachments is confidential and is for the sole use of the intended recipient(s). Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify the sender immediately by replying to this message and destroy all copies of this message and any attachments. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
