SH4_MMUCR_TI
#define SH4_MMU_DISABLE() _reg_write_4(SH4_MMUCR, SH4_MMUCR_TI)
#define SH4_TLB_DISABLE *(volatile uint32_t *)SH4_MMUCR = SH4_MMUCR_TI
cr |= SH4_MMUCR_TI; /* TLB invalidate */