TCR_TG0_SHIFT
#define TCR_TG0_4K (0UL << TCR_TG0_SHIFT)
#define TCR_TG0_64K (1UL << TCR_TG0_SHIFT)
#define TCR_TG0_16K (2UL << TCR_TG0_SHIFT)
#define TCR_TG0_MASK (3UL << TCR_TG0_SHIFT)
return ((reg >> TCR_TG0_SHIFT) & TG_MASK);