SLB_ADDR_LIMIT_DEFAULT   14 arch/powerpc/include/asm/book3s/64/slice.h #define SLB_ADDR_LIMIT_DEFAULT	DEFAULT_MAP_WINDOW_USER64
SLB_ADDR_LIMIT_DEFAULT   16 arch/powerpc/include/asm/nohash/32/slice.h #define SLB_ADDR_LIMIT_DEFAULT	DEFAULT_MAP_WINDOW