On Mar 26, 2008, at 4:16 AM, Stefan Roese wrote: > If CFG_MEM_TOP_HIDE is defined in the board config header, this > specified > memory area will get subtracted from the top (end) of ram and won't > get > "touched" at all by U-Boot. By fixing up gd->ram_size the Linux kernel > should gets passed the now "corrected" memory size and won't touch it > either. This should work for arch/ppc and arch/powerpc. Only Linux > board > ports in arch/powerpc with bootwrapper support, that recalculate the > memory size from the SDRAM controller setup will have to get fixed. > > This patch enables this config option on some PPC440EPx boards as a > workaround > for the CHIP 11 errata. Here the description from the AMCC > documentation:
If you reduce the memory size this way does the 44x kernel have issues with the TLBs that are used to mapped pin kernel lowmem? I know on 85xx this would be a bad thing and rather than changing gd- >ram_size, i'd add a memreserve in the device tree that the kernel got passed. - k ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
