MMC_RES
uint32_t h = CSR_READ_4(sc, MMC_RES) & 0xffff;
uint32_t l = CSR_READ_4(sc, MMC_RES) & 0xffff;
uint32_t h = CSR_READ_4(sc, MMC_RES) & 0xffff;
uint32_t m = CSR_READ_4(sc, MMC_RES) & 0xffff;
uint32_t l = CSR_READ_4(sc, MMC_RES) & 0xffff;