JZ_EFU_READ_SIZE
buf, JZ_EFU_READ_SIZE / sizeof(u32));
size_t start = offset & ~(JZ_EFU_READ_SIZE - 1);
size_t chunk = min(bytes, (start + JZ_EFU_READ_SIZE)
char buf[JZ_EFU_READ_SIZE];
| ((JZ_EFU_READ_SIZE - 1) << EFUCTRL_LEN_SHIFT)