CONFIG_NIOS2_KERNEL_MMU_REGION_BASE   30 arch/nios2/include/asm/pgtable.h #define VMALLOC_START		CONFIG_NIOS2_KERNEL_MMU_REGION_BASE
CONFIG_NIOS2_KERNEL_MMU_REGION_BASE   81 arch/nios2/include/asm/pgtable.h 	(CONFIG_NIOS2_KERNEL_MMU_REGION_BASE / PGDIR_SIZE)