SDMMC_RINTSTS_SDIO
if (stat & SDMMC_RINTSTS_SDIO) {
HWRITE4(sc, SDMMC_RINTSTS, SDMMC_RINTSTS_SDIO);
HCLR4(sc, SDMMC_INTMASK, SDMMC_RINTSTS_SDIO);
HSET4(sc, SDMMC_INTMASK, SDMMC_RINTSTS_SDIO);
HCLR4(sc, SDMMC_INTMASK, SDMMC_RINTSTS_SDIO);
HSET4(sc, SDMMC_INTMASK, SDMMC_RINTSTS_SDIO);
HWRITE4(sc, SDMMC_RINTSTS, ~SDMMC_RINTSTS_SDIO);