On Thursday 24 April 2008, Josh Boyer wrote: > > > Hard to define "works fine" - this is the same 440EPx platform I'm > > > asking about over in the embedded Linux mailing list. I'm pretty sure > > > the kernel doesn't flag SDRAM as Guarded, > > > > Yes, and the 4xx code to dynamically set the SDRAM TLB's in the SPD code > > doesn't set it either. So it really isn't needed. > > Actually, that's not true for kernel memory. We pin 256MiB TLBs to > cover lowmem in AS0, and the Guarded bit is set. We set it to prevent > speculative access to memory holes where the 256MiB TLB covers more > address space than there is physical DRAM.
I wasn't aware of this. Thanks for the explanation. Best regards, Stefan ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
