I'm running 2.6.11 on a Freescale 8555 with 1GB of DDR memory. Looking in arch/ppc/mm/fsl_booke_mmu.c, I see that at most 3 TLB entries will be used to map memory. Since the max tlb size on Freescale Book E is 256 MB, this caps mapped in memory at 768 MB.
I've modified fsl_booke_mmu.c to use a 4th TLB, thus mapping the full 1 GB of memory. However, I'm new to linux memory management, so I'd appreciate any comments as to whether there are tradeoffs or dangers here that I am missing. Thanks, Kylo
