FIX_IMMR_SIZE 63 arch/powerpc/include/asm/fixmap.h FIX_IMMR_BASE = __ALIGN_MASK(FIX_IMMR_START, FIX_IMMR_SIZE - 1) - 1 + FIX_IMMR_SIZE 64 arch/powerpc/include/asm/fixmap.h FIX_IMMR_SIZE, FIX_IMMR_SIZE 17 arch/powerpc/mm/nohash/8xx.c #define IMMR_SIZE (FIX_IMMR_SIZE << PAGE_SHIFT)