RISCV_IOMMU_FSC_BARE
riscv_iommu_iodir_update(iommu, dev, RISCV_IOMMU_FSC_BARE, 0);
riscv_iommu_iodir_update(iommu, dev, RISCV_IOMMU_FSC_BARE, RISCV_IOMMU_PC_TA_V);